Air Conditioning Equipment

Abstract

Compared to a configuration in which the air conditioning device does not operate according to the magnitude of the input voltage, this configuration prevents voltages outside a predetermined magnitude range from being input to the air conditioning device. [Solution] An air conditioning device comprising a voltage information acquisition means for acquiring voltage information regarding an input voltage input to the device itself, a supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the device itself, and a control means for controlling the supply means, wherein the control means has a first supply mode in which fundamental wave reactive power is supplied from the supply means to the receiving point depending on the magnitude of the input voltage identified from the voltage information acquired by the voltage information acquisition means.

Description

[Technical field]

[0001] The present disclosure relates to air conditioning apparatus and control systems. [Background technology]

[0002] Patent Document 1 describes a method of providing a current source capable of generating a first compensation current for at least one of reducing harmonic currents in an air conditioning system and improving the fundamental power factor, and when the surplus current of the current source is larger than a second compensation current for at least one of reducing harmonic currents in the power receiving path of a distribution board and improving the fundamental power factor, a current that is a superposition of the second compensation current and the first compensation current is generated in the current source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6299831 Summary of the Invention [Problem to be solved by the invention]

[0004] A voltage within a predetermined range of magnitude is input to an air conditioner, thereby supplying power to the air conditioner. Here, the magnitude of the voltage input to the air conditioner may fluctuate, and in this case, if the air conditioner does not operate according to the magnitude of the input voltage, a voltage outside the predetermined range of magnitude may be input to the air conditioner. The present disclosure aims to prevent voltages outside a predetermined magnitude range from being input to an air conditioning unit, compared to a configuration in which the air conditioning unit does not operate according to the magnitude of the input voltage. [Means for solving the problem]

[0005] The air conditioning apparatus of the present disclosure includes a voltage information acquisition means for acquiring voltage information related to an input voltage input to the apparatus itself, a supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the apparatus itself, and a control means for controlling the supply means, and the control means supplies fundamental wave reactive power from the supply means to the receiving point in accordance with the magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means. and changing the fundamental wave reactive power or the reactive current according to the result of supplying the fundamental wave reactive power. In this case, compared to a configuration in which the air conditioning device does not operate according to the magnitude of the input voltage, it is possible to prevent a voltage outside a predetermined range of magnitude from being input to the air conditioning device. The air conditioner of the present disclosure includes a voltage information acquisition means for acquiring voltage information related to an input voltage input to the air conditioner, a reactive power identification means for identifying reactive power at a power receiving point of a power consuming facility, a supply means for supplying fundamental wave reactive power to the power receiving point of the input voltage in the air conditioner, and a control means for controlling the supply means, the control means having a first supply mode for supplying fundamental wave reactive power from the supply means to the power receiving point according to the magnitude of the input voltage identified from the voltage information acquired by the voltage information acquisition means, and a second supply mode for supplying reactive current from the supply means to the power receiving point of the power consuming facility according to the reactive power identified by the reactive power identification means, and the air conditioner changes the fundamental wave reactive power or reactive current according to the result of supplying the reactive current. In this case, the power factor can be improved. The air conditioner of the present disclosure includes a voltage information acquisition means for acquiring voltage information on an input voltage input to the air conditioner, a power line information acquisition means for acquiring power line information on apparent power, a supply means for supplying fundamental reactive power to a power receiving point of the input voltage in the air conditioner, and a control means for controlling the supply means, the control means having a first supply mode for supplying fundamental reactive power from the supply means to the power receiving point according to the magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means, and a third supply mode for supplying fundamental reactive power from the supply means to the power receiving point based on the power line information, and the air conditioner changes the fundamental reactive power or reactive current according to the result of supplying the fundamental reactive power. In this case, the voltage input to the air conditioner can be adjusted in the first supply mode or the third supply mode according to the situation. The air conditioner of the present disclosure includes a voltage information acquisition means for acquiring voltage information on an input voltage input to the air conditioner, a power information acquisition means for acquiring power information on an apparent power to be output by the air conditioner, a supply means for supplying fundamental reactive power to a receiving point of the input voltage in the air conditioner, and a control means for controlling the supply means, the control means having a first supply mode for supplying fundamental reactive power from the supply means to the receiving point according to the magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means, and a fourth supply mode for supplying fundamental reactive power from the supply means to the receiving point based on the power information, and the air conditioner changes the fundamental reactive power or reactive current according to the result of supplying the fundamental reactive power. In this case, the voltage input to the air conditioner can be adjusted in the first supply mode or the fourth supply mode according to the situation. [Brief description of the drawings]

[0006] [Figure 1] 1 is a diagram illustrating an example of a voltage adjustment system according to an embodiment of the present invention. [Diagram 2] FIG. 13 is a diagram showing an air conditioning management table. [Diagram 3] 11 is a diagram showing the relationship between an input voltage and a value determined by a supply amount determining unit as a reactive power index. FIG. [Figure 4] 13 is a flowchart showing the flow of a setting process. [Diagram 5] 13 is a diagram showing the relationship between the input voltage and the value determined by the supply amount determination unit as the reactive power index when the setting process is performed. FIG. [Figure 6] 13 is a flowchart showing the flow of a mode determination process. [Figure 7] 11 is a flowchart showing the flow of an adjustment process. [Figure 8] 13 is a flowchart showing the flow of an adjustment process as a modified example. [Figure 9] FIG. 13 is a diagram illustrating an example of a voltage regulating system according to a second embodiment. [Figure 10] FIG. 2 is a diagram showing the hardware configuration of a control server. [Figure 11] FIG. 2 is a diagram showing a functional configuration of a control server. [Figure 12] 4 is a flowchart showing a flow of an air conditioning control process. [Figure 13] 10 is a flowchart showing the flow of a mode control process. [Figure 14] 11 is a diagram showing an example of a method in which a supply amount determination unit determines a reactive power index for a target device. FIG. [Figure 15] 13 is a diagram showing another example of a method in which the supply amount determination unit determines a reactive power index for a target device. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] (First embodiment) The first embodiment will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an example of a voltage regulating system 1 according to the present embodiment. The voltage regulating system 1 is a system for regulating voltage. The voltage regulating system 1 is provided with a power plant 10 and a power consuming facility 20. The power plant 10 is a facility that generates electricity. The power consuming facility 20 is a facility that receives and consumes the power generated by the power plant 10. The power consuming facility 20 is provided with a facility sensor 20S, an air conditioning device 30, and a load 40. Both the air conditioning device 30 and the load 40 receive and consume power through the power consuming facility 20.

[0008] The facility sensor 20S is a sensor that detects reactive power at a power receiving point 20P of the power consuming facility 20. The power receiving point 20P of the power consuming facility 20 is a location where the power consuming facility 20 receives power. The power receiving point 20P of the power consuming facility 20 is, for example, a switchboard (not shown) provided in the power consuming facility 20. The facility sensor 20S detects reactive power at predetermined time intervals. The predetermined time may be any time, but is, for example, one hour. When the facility sensor 20S detects reactive power, it transmits information indicating the detected reactive power to the air conditioning device 30. Hereinafter, the information indicating the reactive power detected by the facility sensor 20S may be referred to as facility sensor information.

[0009] The air conditioner 30 is a device that conditions air by consuming the received power to adjust the temperature and humidity. Moreover, the air conditioner 30 of this embodiment adjusts the voltage input to the air conditioner 30. More specifically, the air conditioner 30 adjusts the voltage input to the air conditioner 30 by supplying fundamental wave reactive power to a power receiving point 30P of the air conditioner 30 according to the magnitude of the voltage input to the air conditioner 30. The power receiving point 30P of the air conditioner 30 is the point where the air conditioner 30 receives power. Moreover, hereinafter, the voltage input to the air conditioner 30 may be referred to as the input voltage. The input voltage is the voltage at the power receiving point 30P of the air conditioning device 30. Therefore, the power receiving point 30P of the air conditioning device 30 can also be regarded as the power receiving point of the input voltage.

[0010] The air conditioner 30 is provided with an air conditioning sensor 30S, an adjustment unit 31, a power conversion device 32, and an active filter (AF) 33. The air conditioning sensor 30S, which is an example of a detection means, is a sensor that detects the voltage and current in the air conditioner 30. The air conditioning sensor 30S detects the voltage and current at predetermined intervals. The predetermined interval may be any time, but is, for example, one hour. When the air conditioning sensor 30S detects the voltage and current, it transmits information indicating the detected voltage and current to the AF 33. Hereinafter, the information indicating the voltage and current detected by the air conditioning sensor 30S may be referred to as air conditioning sensor information. The adjustment unit 31 adjusts temperature and humidity by consuming active power. The adjustment unit 31 is provided with a motor (not shown) that operates by consuming active power. The adjustment unit 31 is, for example, a compressor.

[0011] The power conversion device 32, which is an example of a conversion unit, has an inverter (not shown) and a converter (not shown). The power conversion device 32 converts the power received via the power receiving path 321 into power having a specific voltage and a specific frequency using the inverter and converter. The power receiving path 321 is a path through which the power received by the power conversion device 32 in the air conditioning device 30 passes. The specific voltage and specific frequency are the voltage and frequency required for the operation of a motor provided in the adjustment unit 31. The power conversion device 32 supplies the converted power to the adjustment unit 31. The power receiving point 30P of the air conditioning device 30 described above is, for example, the end of the power receiving path 321. The voltage and current of the target detected by the air conditioning sensor 30S described above are the voltage and current in the power receiving path 321, and are the voltage and current that constitute the power after conversion by the power conversion device 32. However, the voltage and current of the target detected by the air conditioning sensor 30S may also be the voltage and current that constitute the power before conversion by the power conversion device 32.

[0012] The AF33 is electrically connected in parallel with the power conversion device 32 to the power receiving path 321. The AF33 supplies a current to the power receiving path 321 to suppress outflow of harmonic current from the air conditioning device 30. In addition, harmonic current may be generated due to the power conversion by the power conversion device 32. In this case, the AF33 supplies a current to the power receiving path 321 to reduce the harmonic current in the power receiving path 321, thereby suppressing outflow of harmonic current from the air conditioning device 30. In addition, the AF33 adjusts the power factor at the power receiving point 20P of the power consuming facility 20 by supplying a current to the power receiving point 20P of the power consuming facility 20.

[0013] An example of a method for suppressing harmonic current by AF 33 will be described. When harmonic current is generated in power receiving path 321 of power consuming facility 20, AF 33 supplies current having an opposite phase to the harmonic current in power receiving path 321 to power receiving path 321, thereby reducing the harmonic current in power receiving path 321. This suppresses harmonic current from flowing out from air conditioning device 30. Note that the harmonic current to be suppressed by AF 33 may be a harmonic current of any order. An example of a method in which the AF 33 adjusts the power factor at the power receiving point 20P of the power consuming facility 20 will be described. When reactive power is generated at the power receiving point 20P of the power consuming facility 20, the AF 33 supplies a current constituting reactive power that is in opposite phase to the reactive power at the power receiving point 20P to the power receiving point 20P, thereby reducing the reactive power at the power receiving point 20P. Then, as the reactive power at the power receiving point 20P decreases, the power factor at the power receiving point 20P improves.

[0014] Moreover, the AF 33 of this embodiment adjusts the voltage input to the air conditioner 30 by supplying fundamental reactive power to the power receiving point 30P of the air conditioner 30. More specifically, the AF 33 adjusts the voltage input to the air conditioner 30 by supplying a current constituting fundamental reactive power to the power receiving point 30P of the air conditioner 30 according to the magnitude of the input voltage. An example of a method in which AF33 adjusts the voltage input to the air conditioner 30 will be described. When AF33 supplies leading reactive power to the power receiving point 30P of the air conditioner 30, the voltage at the power receiving point 30P increases. Also, when AF33 supplies lagging reactive power to the power receiving point 30P of the air conditioner 30, the voltage at the power receiving point 30P decreases. In this way, the voltage at the power receiving point 30P is adjusted by AF33 supplying leading reactive power or lagging reactive power to the power receiving point 30P of the air conditioner 30. Also, as the voltage at the power receiving point 30P of the air conditioner 30 is adjusted, the voltage input to the air conditioner 30 is also adjusted. Note that leading reactive power is reactive power in which the phase of the current is leading with respect to the voltage. Also, lagging reactive power is reactive power in which the phase of the current is lagging with respect to the voltage.

[0015] The AF 33 includes an acquisition unit 331, a storage unit 332, a measurement unit 333, a mode determination unit 334, an adjustment determination unit 335, a harmonic identification unit 336, a reactive power identification unit 337, and an input voltage identification unit 338. The AF 33 also includes a supply amount determination unit 339, a supply unit 340, and a suppression unit 341. The acquisition unit 331, the mode determination unit 334, the adjustment determination unit 335, the harmonic identification unit 336, the reactive power identification unit 337, the input voltage identification unit 338, the supply amount determination unit 339, the supply unit 340, and the suppression unit 341 are realized by, for example, a microcomputer. The storage unit 332 is realized by, for example, a storage device such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The measurement unit 333 is realized by, for example, a real-time clock (RTC: Real-Time Clock).

[0016] The acquisition unit 331, which is an example of a voltage information acquisition means, acquires information transmitted to the air conditioning apparatus 30. Examples of the information transmitted to the air conditioning apparatus 30 include facility sensor information and air conditioning sensor information. The acquisition unit 331 also acquires information about the position of the air conditioning device 30. Hereinafter, information about the position of the air conditioning device 30 may be referred to as position information. Therefore, the acquisition unit 331 can also be regarded as a position information acquisition means for acquiring position information. The position information includes information indicating the relationship between the position of an adjustment means (not shown) that is connected to an electric circuit through which the power supplied from the power plant 10 passes and adjusts the voltage, and the position of the air conditioning device 30. More specifically, the position information includes information indicating the relationship between the position of the electric circuit to which the adjustment means is connected and the position of the electric circuit to which the air conditioning device 30 is connected. Examples of the adjustment means include a substation, a transformer, an automatic voltage regulator (SVR: Step Voltage Regulator), a static var compensator (SVC: Static Var Compensator), and the like. Note that the adjustment means may be any device other than the above-mentioned devices as long as it is a means for adjusting voltage. In addition, an energy system that generates renewable energy, such as a solar power generation system or a wind power generation system, may be connected to the electric circuit through which the power supplied from the power plant 10 passes. In this case, information indicating the relationship between the position of the electric circuit to which the energy system is connected and the position of the electric circuit to which the air conditioning device 30 is connected may be position information. In this embodiment, a user of the voltage regulating system 1 may use a computer (not shown) to create position information and transmit the created position information to the air conditioning device 30. However, the position information may be created by any method, and may be acquired by the acquisition unit 331 by any method. The acquiring unit 331 stores the acquired information in the storage unit 332 .

[0017] The storage unit 332 stores information. The information stored in the storage unit 332 will be described in detail later. The measurement unit 333 measures time. Each time the supply unit 340 operates, the measurement unit 333 measures the time during which the supply unit 340 has operated, and stores the measured time in the memory unit 332. Furthermore, if the time during which the supply unit 340 has previously operated has already been stored in the memory unit 332, the measurement unit 333 adds the time during which the supply unit 340 has newly operated to the time stored in the memory unit 332. As a result, the memory unit 332 stores the cumulative time during which the supply unit 340 has operated. The measurement unit 333 also indicates the time.

[0018] The mode determination unit 334 determines a mode for controlling the operation of the AF33. The mode determination unit 334 of this embodiment has an internal mode. The internal mode is a mode in which the AF33 supplies fundamental reactive power to the power receiving point 30P of the air conditioning device 30 based on information from a sensor provided inside the power consuming facility 20. In addition, examples of sensors provided inside the power consuming facility 20 include a facility sensor 20S and an air conditioning sensor 30S. In the internal mode, the AF33 of this embodiment supplies a current constituting fundamental reactive power to the power receiving point 30P of the air conditioning device 30. In this embodiment, a voltage adjustment mode and a voltage non-adjustment mode are provided as modes for controlling the operation of AF 33. The voltage adjustment mode is a mode in which AF 33 adjusts the voltage input to the air conditioner 30. The voltage non-adjustment mode is a mode in which AF 33 does not adjust the voltage input to the air conditioner 30. The operation of AF 33 is controlled depending on whether the mode determination unit 334 is in the voltage adjustment mode or the voltage non-adjustment mode. In this embodiment, the AF33 suppresses harmonic currents regardless of whether the mode determination unit 334 is in the voltage regulation mode or the voltage non-regulation mode. When the mode determination unit 334 is in the voltage regulation mode, the AF33 does not adjust the power factor at the power receiving point 20P of the power consuming facility 20. On the other hand, when the mode determination unit 334 is in the voltage non-regulation mode, the AF33 adjusts the power factor at the power receiving point 20P of the power consuming facility 20. The mode determination unit 334 switches between the voltage regulation mode or the voltage non-regulation mode based on a predetermined condition.

[0019] The adjustment decision unit 335 decides whether or not to have AF33 adjust the voltage input to the air conditioning device 30. The adjustment decision unit 335 decides whether or not to have AF33 adjust the voltage input to the air conditioning device 30, depending on whether the mode decision unit 334 is in the voltage adjustment mode or the voltage non-adjustment mode. Furthermore, the adjustment decision unit 335 decides whether or not to have AF33 adjust the voltage input to the air conditioning device 30, depending on the magnitude of the input voltage.

[0020] The harmonic identifying unit 336 identifies the harmonic current in the power receiving path 321. More specifically, the harmonic identifying unit 336 identifies the harmonic current in the power receiving path 321 from the air conditioning sensor information stored in the storage unit 332. The harmonic identifying unit 336 also calculates a current that needs to be supplied from the AF 33 to reduce the identified harmonic current. Hereinafter, the current that needs to be supplied from the AF 33 to reduce the harmonic current in the power receiving path 321 may be referred to as a current required for reduction. The harmonic identifying unit 336 identifies the harmonic current in the power receiving path 321 and calculates the current required for reduction every time the air conditioning sensor information is newly stored in the storage unit 332. Moreover, the harmonic identifying unit 336 stores the calculated value of the current required for reduction in the storage unit 332 every time the harmonic identifying unit 336 calculates the current required for reduction.

[0021] The reactive power identifying unit 337 identifies reactive power at the power receiving point 20P of the power consuming facility 20. More specifically, the reactive power identifying unit 337 identifies reactive power at the power receiving point 20P of the power consuming facility 20 from the facility sensor information stored in the storage unit 332. The reactive power identifying unit 337 also calculates a current that needs to be supplied from the AF 33 to reduce the identified reactive power. The current that needs to be supplied from the AF 33 to reduce the reactive power at the power receiving point 20P of the power consuming facility 20 may be referred to as a reduced required current below. The reactive power identifying unit 337 identifies reactive power at the power receiving point 20P of the power consuming facility 20 and calculates the reduced required current every time the facility sensor information is newly stored in the storage unit 332. The reactive power identifying unit 337 also stores the calculated reduced required current value in the storage unit 332 every time the reactive power identifying unit 337 calculates the reduced required current.

[0022] The input voltage identifying unit 338 identifies the input voltage from the air conditioning sensor information stored in the memory unit 332. More specifically, the input voltage identifying unit 338 identifies the input voltage by calculating the voltage before conversion by the power conversion device 32 from the voltage of the power receiving path 321 indicated in the air conditioning sensor information. In addition, the input voltage identifying unit 338 calculates the fundamental wave reactive power that needs to be supplied from the AF 33 to adjust the voltage input to the air conditioning device 30 from the identified input voltage. The fundamental wave reactive power that needs to be supplied from the AF 33 to adjust the voltage input to the air conditioning device 30 may be referred to as the adjustment required power below. The input voltage identifying unit 338 identifies the input voltage and calculates the adjustment required power every time the air conditioning sensor information is newly stored in the memory unit 332. The air conditioning sensor information can also be regarded as voltage information related to the input voltage. The air conditioning sensor 30S can also be regarded as voltage information acquisition means for acquiring voltage information.

[0023] The supply amount determination unit 339 determines the supply amount when the AF 33 is caused to supply a current or a fundamental wave reactive power. The supply amount determination unit 339 determines the required current to be reduced calculated by the harmonic identification unit 336 as a current to be supplied to AF33 in order to reduce the harmonic current in the power receiving path 321. Furthermore, the supply amount determination unit 339 calculates a value obtained by subtracting the required current to be reduced from the capacity of the current that AF33 can supply. The capacity of the current that AF33 can supply is the maximum current that AF33 can supply. Furthermore, hereinafter, the value obtained by subtracting the required current to be reduced from the capacity of the current that AF33 can supply may be referred to as a subtraction value.

[0024] When AF33 is caused to adjust the power factor at the power receiving point 20P of the power consuming facility 20, the supply amount determination unit 339 determines the current to be supplied by AF33 depending on whether the subtraction value is greater than the reduced required current. More specifically, when the subtraction value is greater than the reduced required current, the supply amount determination unit 339 determines the current to be supplied by AF33 to adjust the power factor at the power receiving point 20P to be the reduced required current. When the subtraction value is smaller than the reduced required current, the supply amount determination unit 339 determines the current to be supplied by AF33 to adjust the power factor at the power receiving point 20P to be the subtraction value.

[0025] Furthermore, when the voltage input to the air conditioning device 30 is adjusted by AF33, the supply amount determination unit 339 determines a reactive power index depending on whether or not the subtraction value is greater than the current constituting the power required for adjustment. The reactive power index is an index related to the fundamental wave reactive power supplied by AF33. An example of the reactive power index is the fundamental wave reactive power supplied by AF33. Another example of the reactive power index is the reactive current supplied by AF33. When the subtraction value is greater than the current constituting the power required for adjustment, the supply amount determination unit 339 determines the reactive power index based on the power required for adjustment or the reactive current constituting the power required for adjustment. When the subtraction value is smaller than the current constituting the power required for adjustment, the supply amount determination unit 339 determines the reactive power index based on the subtraction value or the fundamental wave reactive power converted from the subtraction value. Note that, hereinafter, an index used as a reference when the supply amount determination unit 339 determines the reactive power index may be referred to as a reference index. The reference index is an index related to fundamental wave reactive power. Examples of the reference index include fundamental wave reactive power and reactive current. A method for determining the reactive power index by the supply amount determination unit 339 will be described in detail later.

[0026] In addition, there are cases where AF33 does not supply a current for reducing harmonic current when adjusting the power factor at the power receiving point 20P of the power consuming facility 20. In this case, the supply amount determination unit 339 determines the current to be supplied by AF33 to adjust the power factor at the power receiving point 20P depending on whether the capacity of the current that AF33 can supply is larger than the required current to be reduced. Furthermore, there are cases where the AF 33 does not supply a current for reducing harmonic current when adjusting the voltage input to the air conditioning device 30. In this case, the supply amount determination unit 339 determines the reactive power index depending on whether the capacity of the current that the AF 33 can supply is greater than the current that constitutes the power requiring adjustment.

[0027] Furthermore, when AF33 supplies a current to the power receiving path 321 in order to reduce harmonic current, there may be no remaining capacity of current that AF33 can supply. In this case, regardless of the mode of the mode determination unit 334 or the magnitude of the input voltage, the supply amount determination unit 339 does not allow AF33 to supply fundamental reactive power or current for the purpose of adjusting the voltage input to the air conditioning device 30 or adjusting the power factor at the power receiving point 20P of the power consuming facility 20.

[0028] The supply unit 340, which is an example of a supply means, supplies a current. More specifically, the supply unit 340 supplies a current of a magnitude determined by the supply amount determination unit 339. When instructed by the supply amount determination unit 339 to reduce harmonic current in the power receiving path 321, the supply unit 340 supplies a current to the power receiving path 321. Furthermore, when instructed by the supply amount determination unit 339 to adjust the power factor at the power receiving point 20P of the power consuming facility 20, the supply unit 340 supplies a current to the power receiving point 20P of the power consuming facility 20. Furthermore, when instructed by the supply amount determination unit 339 to adjust the voltage input to the air conditioning device 30, the supply unit 340 supplies a current constituting fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30.

[0029] When supplying fundamental reactive power to the power receiving point 30P of the air conditioning device 30, the supply unit 340 may increase the fundamental reactive power to be supplied stepwise over time, and finally supply fundamental reactive power of the magnitude determined by the supply amount determination unit 339. In other words, the supply unit 340 may supply fundamental reactive power having a first power magnitude at a specific time after starting the supply of fundamental reactive power, and supply fundamental reactive power having a second power magnitude greater than the first power at a time after the specific time. In this case, compared to a configuration in which the supply unit 340 supplies fundamental reactive power of a magnitude determined by the supply amount determination unit 339 as soon as the supply of fundamental reactive power begins, the fundamental reactive power of the determined magnitude is supplied to the power receiving point 30P of the air conditioning device 30 all at once, thereby suppressing unintended voltage fluctuations at the power receiving point 30P.

[0030] The suppression unit 341 suppresses the consumption of active power by the air conditioning device 30. More specifically, the suppression unit 341 instructs the power conversion device 32 to reduce the power that the power conversion device 32 supplies to the adjustment unit 31, based on a predetermined condition. When the power conversion device 32 receives the instruction from the suppression unit 341, it reduces the power that it supplies to the adjustment unit 31. This suppresses the consumption of active power by the adjustment unit 31. The mode determination unit 334, the adjustment determination unit 335, the supply amount determination unit 339, and the suppression unit 341 can also be regarded as control means for controlling the air conditioning device 30.

[0031] In this embodiment, the facility sensor 20S and the air conditioning apparatus 30 are connected via a network (not shown). The network connecting the facility sensor 20S and the air conditioning apparatus 30 may be capable of transmitting and receiving data. Furthermore, the communication line used for transmitting and receiving data may be wired or wireless. Furthermore, a configuration in which the facility sensor 20S and the air conditioning apparatus 30 are connected to a communication destination via multiple networks or communication lines may be used.

[0032] 1 shows an example in which the number of air conditioners 30 and loads 40 provided in the power consuming facility 20 is one each, but this is not limited to this. Two or more air conditioners 30 may be provided in the power consuming facility 20. Two or more loads 40 may be provided in the power consuming facility 20.

[0033] 2 is a diagram showing an air conditioning management table. The air conditioning management table is a table for managing the air conditioners 30. The air conditioning management table is stored in the storage unit 332. In the air conditioning management table, the input voltage is shown in "input voltage". "Input voltage" is the latest input voltage identified by input voltage identification unit 338. Every time the input voltage identification unit 338 identifies the latest input voltage, the "input voltage" in the air conditioning management table is overwritten with the latest identified input voltage.

[0034] Furthermore, in the air conditioning management table, the accumulated time that the supply unit 340 has operated is indicated in "operating time". "Operating time" is the time measured by the measuring unit 333 as the accumulated time that the supply unit 340 has operated. Each time the supply unit 340 newly operates, the newly operated time is measured by the measuring unit 333, and the measured time is added to the "operating time" in the air conditioning management table. Note that the time measured by the measuring unit 333 as the operation time of the supply unit 340 is the time that the supply unit 340 performed the operation of supplying current.

[0035] Moreover, in the air conditioning management table, the location information acquired by the acquisition unit 331 is indicated in the "location information" field. Furthermore, in the air conditioning management table, the mode of the mode determination unit 334 is shown in "mode". "Mode" is the latest mode determined by the mode determination unit 334. "Adjustment" shown in "mode" means that the mode determination unit 334 is in the voltage adjustment mode. Furthermore, "Non-adjustment" shown in "mode" means that the mode determination unit 334 is in the voltage non-adjustment mode. Each time the latest mode is determined by the mode determination unit 334, the latest mode determined is overwritten in "mode" in the air conditioning management table.

[0036] Furthermore, in the air conditioning management table, the capacity of the current that AF33 can supply is indicated in "capacity". In this embodiment, a user of the voltage regulating system 1 uses a computer (not shown) to transmit information indicating the capacity of the current that AF33 can supply to the air conditioning device 30, and the information transmitted from the computer is stored in "capacity" in the air conditioning management table. The information indicated in "capacity" is used by the supply amount determination unit 339 to specify the subtraction value. Furthermore, in the air conditioning management table, the current required to be reduced is shown in "current required to be reduced." The "current required to be reduced" is the latest current required to be reduced identified by the harmonic identifying unit 336. Every time the harmonic identifying unit 336 identifies the latest current required to be reduced, the "current required to be reduced" in the air conditioning management table is overwritten with the latest identified current required to be reduced.

[0037] In the illustrated example, in the air conditioning management table, "Input voltage" is shown as "V1," "Operating time" is shown as "T1," "Location information" is shown as "P1," "Mode" is shown as "Adjustment," "Capacity" is shown as "C1," and "Reduced current required" is shown as "N1."

[0038] Fig. 3 is a diagram showing the relationship between the input voltage and the value determined by the supply amount determination unit 339 as the reactive power index. In Fig. 3, the vertical axis represents the reactive power index, and the horizontal axis represents the input voltage. Fig. 3 also shows a Volt-Var curve L. The Volt-Var curve L is a line that defines the relationship between the input voltage and the value determined by the supply amount determination unit 339 as the reactive power index. In addition, a lag reference index Qa and a lead reference index Qb are defined as reactive power indices in the Volt-Var curve L. The lag reference index Qa is a reference index for lag reactive power or a reactive current constituting lag reactive power. The lead reference index Qb is a reference index for lag reactive power or a reactive current constituting lag reactive power.

[0039] Further, on the Volt-Var curve L, a rated value Va, an unnecessary upper limit value Vb, a maximum lag value Vc, an unnecessary lower limit value Vd, and a maximum lead value Ve are defined as input voltage values. The rated value Va is a rated value of the input voltage. In this embodiment, the rated value Va is determined by a user of the voltage regulating system 1. The rated value Va may be any value, but is, for example, 202V.

[0040] The unnecessary upper limit value Vb is an upper limit value of the input voltage determined by the supply amount determination unit 339 when it is unnecessary for the supply unit 340 to supply fundamental wave reactive power. The unnecessary upper limit value Vb may be any value, but is, for example, a value 5% higher than the rated value Va. The maximum delay value Vc is an input voltage determined by the supply amount determination unit 339 to cause the supply unit 340 to supply the maximum fundamental wave reactive power that the supply unit 340 can supply as the delay reactive power. The maximum delay value Vc may be any value, but is, for example, a value 10% higher than the rated value Va.

[0041] The unnecessary lower limit value Vd is a lower limit value of the input voltage determined by the supply amount determination unit 339 as being unnecessary for the supply unit 340 to supply fundamental wave reactive power. The unnecessary lower limit value Vd may be any value, for example, a value 5% lower than the rated value Va. Note that the unnecessary upper limit value Vb and the unnecessary lower limit value Vd may have different ratios to the rated value Va. The maximum lead value Ve is an input voltage determined by the supply amount determination unit 339 to cause the supply unit 340 to supply the maximum fundamental wave reactive power that the supply unit 340 can supply as leading reactive power. The maximum lead value Ve may be any value, and is, for example, a value 10% lower than the rated value Va. Note that the maximum lag value Vc and the maximum lead value Ve may have different ratios to the rated value Va.

[0042] The supply amount determination unit 339 of this embodiment determines the reactive power index to be a value corresponding to the coordinates on the Volt-Var curve L at which the input voltage is located. 0% is shown for the reactive power index corresponding to the coordinates at which the input voltage is equal to or greater than the unnecessary lower limit Vd and equal to or less than the unnecessary upper limit Vb on the Volt-Var curve L. This means that when the input voltage is equal to or greater than the unnecessary lower limit Vd and equal to or less than the unnecessary upper limit Vb, the supply amount determination unit 339 does not cause the supply unit 340 to supply fundamental reactive power to adjust the voltage input to the air conditioning device 30. On the other hand, when the input voltage is less than the unnecessary lower limit Vd or greater than the unnecessary upper limit Vb, the supply amount determination unit 339 causes the supply unit 340 to supply fundamental reactive power to adjust the voltage input to the air conditioning device 30.

[0043] Furthermore, when the input voltage is equal to or greater than the maximum lag value Vc, the supply amount determination unit 339 determines the reactive power index to be the lag reference index Qa. In other words, when the input voltage is equal to or greater than the maximum lag value Vc, the supply amount determination unit 339 determines to have the supply unit 340 supply the maximum fundamental reactive power that the supply unit 340 can supply as the lag reactive power. Furthermore, when the input voltage is greater than the unnecessary upper limit value Vb and less than the maximum lag value Vc, the supply amount determination unit 339 determines the reactive power index to be a ratio to the lag reference index Qa that is greater than 0% and less than 100%. In this case, the supply amount determination unit 339 determines a reactive power index whose ratio to the lag reference index Qa is greater as the input voltage is greater.

[0044] Furthermore, when the input voltage is equal to or less than the maximum leading value Ve, the supply amount determination unit 339 determines the reactive power index to be the leading reference index Qb. In other words, when the input voltage is equal to or less than the maximum leading value Ve, the supply amount determination unit 339 determines to have the supply unit 340 supply the maximum fundamental reactive power that the supply unit 340 can supply as leading reactive power. Furthermore, when the input voltage is less than the unnecessary lower limit Vd and greater than the maximum lead value, the supply amount determination unit 339 determines the reactive power index to be a ratio to the lead reference index Qb that is greater than 0% and less than 100%. In this case, the smaller the input voltage, the greater the ratio of the reactive power index determined by the supply amount determination unit 339 to the lead reference index Qb.

[0045] In this embodiment, when the input voltage is equal to or greater than the unnecessary lower limit Vd and equal to or less than the unnecessary upper limit Vb, the mode determination unit 334 may be in the voltage adjustment mode. In this case, the supply amount determination unit 339 does not allow the supply unit 340 to supply fundamental reactive power for adjusting the voltage input to the air conditioning device 30. There are also cases where the mode determination unit 334 is in the voltage non-adjustment mode. In this case, even if the input voltage is less than the unnecessary lower limit value Vd or greater than the unnecessary upper limit value, the supply amount determination unit 339 does not allow the supply unit 340 to supply fundamental reactive power for adjusting the voltage input to the air conditioning device 30.

[0046] 4 is a flowchart showing the flow of the setting process. In the setting process, the supply amount determination unit 339 sets the unnecessary upper limit value Vb, the maximum delay value Vc, the unnecessary lower limit value Vd, and the maximum advance value Ve. In this embodiment, when the adjustment process (see FIG. 7) described later is performed, the setting process is started before the adjustment process is performed.

[0047] The supply amount determination unit 339 judges whether or not the current time is a high pressure period (step (hereinafter referred to as "S") 101). The high pressure period is a period determined as a period when a voltage higher than the rated value Va is likely to be input to the air conditioning device 30. The high pressure period is, for example, from 7 PM to 7 AM. At night, compared to daytime, the air conditioners 30 and the loads 40 of the power consuming facilities 20 are less likely to be used, and therefore a voltage higher than the rated value Va is more likely to be input to the air conditioners 30. Therefore, in this embodiment, the nighttime is defined as a high pressure period.

[0048] If the current time is the high pressure period (YES in S101), the supply amount determination unit 339 resets the unnecessary upper limit value Vb and the delay maximum value Vc to values ​​that are a first percentage lower than the set values ​​(S102). The first percentage may be any percentage, but is, for example, 2%. On the other hand, if the current time is not the high pressure period (NO in S101), the unnecessary upper limit value Vb and the delay maximum value Vc do not change from the set values. In a period when a voltage higher than the rated value Va is likely to be input to the air conditioner 30, the unnecessary upper limit value Vb becomes lower than in a period other than this period, so that the input voltage is more likely to exceed the unnecessary upper limit value Vb. In this case, the supply unit 340 is more likely to supply fundamental reactive power. Also, in a period when a voltage higher than the rated value Va is likely to be input to the air conditioner 30, the maximum delay value Vc becomes lower than in a period other than this period, so that the input voltage is more likely to reach the maximum delay value Vc. In this case, the voltage input to the air conditioner 30 is more likely to be adjusted by the supply unit 340.

[0049] The supply amount determination unit 339 judges whether or not the current time is a low voltage period (S103). The low voltage period is a period determined as a period during which a voltage lower than the rated value Va is likely to be input to the air conditioning device 30. The low voltage period is, for example, from 10:00 a.m. to 4:00 p.m. During the day, compared to the nighttime, the air conditioners 30 and the loads 40 of the power consuming facilities 20 are more likely to be used, and therefore a voltage lower than the rated value Va is more likely to be input to the air conditioners 30. Therefore, in this embodiment, the daytime is defined as a low-voltage period.

[0050] If the current time is a low pressure period (YES in S103), the supply amount determination unit 339 resets the unnecessary lower limit value Vd and the advance maximum value Ve to values ​​that are a second percentage higher than the set values ​​(S104). The second percentage may be any percentage, but is, for example, 2%. On the other hand, if the current time is not a low pressure period (NO in S103), the unnecessary lower limit value Vd and the advance maximum value Ve do not change from the set values. In a period when a voltage lower than the rated value Va is likely to be input to the air conditioning device 30, the unnecessary lower limit value Vd becomes higher than in a period other than this period, making it easier for the input voltage to become less than the unnecessary lower limit value Vd. In this case, it becomes easier for the supply unit 340 to supply fundamental wave reactive power. Also, in a period when a voltage lower than the rated value Va is likely to be input to the air conditioning device 30, the leading maximum value Ve becomes lower than in a period other than this period, making it easier for the input voltage to reach the leading maximum value Ve. In this case, it becomes easier for the supply unit 340 to adjust the voltage input to the air conditioning device 30.

[0051] The supply amount determination unit 339 judges whether or not the air conditioning device 30 is located at a high pressure position (S105). The high pressure position is a position of the air conditioning device 30 that is determined as a position where a voltage higher than the rated value Va is likely to be input to the air conditioning device 30. In this embodiment, the high pressure position is a position of the air conditioning device 30 that is within a predetermined distance from the energy system. The predetermined distance may be any distance, but is, for example, 10 km. The supply amount determination unit 339 judges whether or not the air conditioning device 30 is located at a high pressure position from the "position information" shown in the air conditioning management table (see FIG. 2). When the air conditioning device 30 is located near an energy system, reverse power flow of the electricity generated by the energy system may cause a rise in voltage near the energy system, which may then cause a rise in the voltage input to the air conditioning device 30. Therefore, in this embodiment, the vicinity of the energy system is defined as a high voltage location.

[0052] If the air conditioning device 30 is located in the high pressure position (YES in S105), the supply amount determination unit 339 resets the unnecessary upper limit value Vb and the maximum delay value Vc to values ​​that are a third percentage lower than the set values ​​(S106). The third percentage may be any percentage, but is, for example, 2%. On the other hand, if the air conditioning device 30 is not located in the high pressure position (NO in S105), the unnecessary upper limit value Vb and the maximum delay value Vc do not change from the set values.

[0053] The supply amount determination unit 339 judges whether or not the air conditioning device 30 is located at a low pressure position (S107). The low pressure position is a position of the air conditioning device 30 that is determined as a position where a voltage lower than the rated value Va is likely to be input to the air conditioning device 30. In this embodiment, the low pressure position is a position of the air conditioning device 30 where a predetermined number or more of loads 40 are provided within a predetermined distance. The predetermined number may be any value, for example, 100. The predetermined distance may be any value, for example, 100 m. The supply amount determination unit 339 specifies whether or not the air conditioning device 30 is located at a low pressure position from the "position information" shown in the air conditioning management table. When a large number of loads 40 are provided near the air conditioning apparatus 30, the voltage near the loads 40 tends to drop when these loads 40 are used, and as a result, a voltage lower than the rated value Va tends to be input to the air conditioning apparatus 30. Therefore, in this embodiment, the position of the air conditioning apparatus 30 near which a large number of loads 40 are provided is defined as a low-voltage position.

[0054] If the air conditioning device 30 is located in a low pressure position (YES in S107), the supply amount determination unit 339 resets the unnecessary lower limit value Vd and the advance maximum value Ve to values ​​that are a fourth percentage higher than the set values ​​(S108). The fourth percentage may be any percentage, but is, for example, 2%. On the other hand, if the air conditioning device 30 is not located in a low pressure position (NO in S107), the unnecessary lower limit value Vd and the advance maximum value Ve remain unchanged from the set values.

[0055] FIG. 5 is a diagram showing the relationship between the input voltage and the value determined by the supply amount determining unit 339 as the reactive power index when the setting process (see FIG. 4) is performed. In the following, it is assumed that in the setting process, the unnecessary upper limit value Vb and the maximum lag value Vc are set to values ​​that are the first percentage lower (see S102 in FIG. 4), and the unnecessary lower limit value Vd and the maximum lead value Ve are set to values ​​that are the fourth percentage higher (see S108 in FIG. 4). In this case, as shown in FIG. 5, the relationship between the input voltage and the value determined by the supply amount determination unit 339 as the reactive power index changes from the Volt-Var curve L' before the setting process is performed to the Volt-Var curve L after the setting process is performed.

[0056] An unnecessary upper limit value Vb', a maximum lag value Vc', an unnecessary lower limit value Vd', and a maximum lead value Ve' are defined on the Volt-Var curve L' before the setting process is performed. Also, an unnecessary upper limit value Vb, a maximum lag value Vc, an unnecessary lower limit value Vd, and a maximum lead value Ve are defined on the Volt-Var curve L after the setting process is performed. The lag reference indicator Qa, the lead reference indicator Qb, and the rated value Va are the same in the Volt-Var curve L' before the setting process is performed and in the Volt-Var curve L after the setting process is performed. However, the lag reference indicator Qa and the lead reference indicator Qb may be different in the Volt-Var curve L' before the setting process is performed and in the Volt-Var curve L after the setting process is performed.

[0057] The unnecessary upper limit value Vb and maximum delay value Vc after the setting process are lower than the unnecessary upper limit value Vb' and maximum delay value Vc' before the setting process. Moreover, the unnecessary lower limit value Vd and maximum lead value Ve after the setting process are higher than the unnecessary lower limit value Vd' and maximum lead value Ve' before the setting process. Moreover, the slope of the value determined by the supply amount determination unit 339 as the reactive power index relative to the input voltage is greater in the Volt-Var curve L after the setting process than in the Volt-Var curve L' before the setting process.

[0058] Here, when the input voltage is equal to or greater than the unnecessary upper limit value Vb and less than the maximum delay value Vc, the supply amount determination unit 339 determines a larger value as the reactive power index after the setting process is performed than before the setting process is performed. In addition, when the input voltage is less than the unnecessary lower limit value Vd and higher than the maximum lead value Ve, the supply amount determination unit 339 determines a larger value as the reactive power index after the setting process is performed than before the setting process is performed.

[0059] 6 is a flowchart showing the flow of the mode determination process. The mode determination process is a process in which the mode determination unit 334 determines the operation mode of the AF 33. In this embodiment, the mode determination process is started at predetermined time intervals. The predetermined time may be any time, but is, for example, one hour.

[0060] The mode determination unit 334 judges whether the current time is an unnecessary period (S201). The unnecessary period is a period in which the mode determination unit 334 determines that adjustment by AF33 of the voltage input to the air conditioning device 30 is unnecessary. The unnecessary period is, for example, any period from April to June, October, or November. In spring and autumn, the air conditioner 30 is used less frequently than in summer and winter. When the air conditioner 30 is used less frequently, the voltage input to the air conditioner 30 is less likely to fluctuate than when the air conditioner 30 is used more frequently. For this reason, the periods when the air conditioner 30 is used less frequently are defined as periods when adjustment of the voltage input to the air conditioner 30 by AF33 is not necessary.

[0061] If the current time is not an unnecessary period (NO in S201), the mode determination unit 334 judges whether or not the cumulative time during which the supply unit 340 has operated has reached the upper limit time (S202). The upper limit time is a threshold value at which the mode determination unit 334 determines that the AF33 will not adjust the voltage input to the air conditioning device 30, and is a threshold value for the operating time of the supply unit 340. The upper limit time is determined from the perspective of preventing malfunctions in the AF33. The upper limit time may be any time, but is, for example, 5000 hours. As the cumulative operation time of the supply unit 340 becomes longer and the life of the supply unit 340 approaches, a malfunction is likely to occur in the AF 33. In other words, as the limit at which the supply unit 340 can continue to operate even if it changes over time approaches, a malfunction is likely to occur in the AF 33. For this reason, a specific operation time of the supply unit 340 is determined in relation to the life of the supply unit 340 as a threshold value at which the mode determination unit 334 determines that the AF 33 will not adjust the voltage input to the air conditioning device 30.

[0062] If the cumulative operation time of the supply unit 340 has reached the upper limit time (YES in S202), the mode determination unit 334 judges whether or not the current time is a necessary period (S203). The necessary period is a period when the mode determination unit 334 determines that adjustment by AF33 of the voltage input to the air conditioning device 30 is necessary. The necessary period is, for example, from 10:00 AM to 4:00 PM from July to September, or from 7:00 PM to 12:00 PM from December to March. During the day in summer, the temperature tends to be higher than at night in summer or in seasons other than summer, so the air conditioner 30 is more likely to be used to lower the room temperature. Also, during the night in winter, the temperature tends to be lower than at daytime in winter or in seasons other than winter, so the air conditioner 30 is more likely to be used to raise the room temperature. When the air conditioner 30 is more likely to be used, the voltage input to the air conditioner 30 is more likely to fluctuate than when the air conditioner 30 is less likely to be used. For this reason, the period when the air conditioner 30 is more likely to be used is defined as the period when the voltage input to the air conditioner 30 needs to be adjusted by AF33.

[0063] If the current time is not the necessary time (NO in S203), or if a positive result is obtained in step 201, the mode determination unit 334 judges whether or not the air conditioner 30 is located at a necessary position (S204). The necessary position is the position of the air conditioner 30 at which the mode determination unit 334 determines that the voltage input to the air conditioner 30 needs to be adjusted by the AF33. An example of the necessary position is a position of the air conditioner 30 that is farther away from the adjustment means than a predetermined distance. Another example of the necessary position is a position of the air conditioner 30 that is within a predetermined distance from the energy system. The predetermined distance may be any distance, but is, for example, 10 km. The mode determination unit 334 judges whether or not the air conditioner 30 is located at a necessary position from the "position information" shown in the air conditioning management table (see FIG. 2).

[0064] When the air conditioner 30 is located near the adjustment means, as the adjustment means adjusts the voltage, the voltage near the adjustment means is also adjusted, making it difficult for the voltage input to the air conditioner 30 to fluctuate. In contrast, when the air conditioner 30 is located at a position away from the adjustment means, the adjustment means' voltage adjustment is unlikely to have an effect on the air conditioner 30, so even if the adjustment means adjusts the voltage, fluctuations in the voltage input to the air conditioner 30 are unlikely to be suppressed. In this case, AF33 needs to adjust the voltage input to the air conditioner 30. Furthermore, when the air conditioner 30 is located near the energy system, reverse power flow of the electricity generated by the energy system may cause a rise in the voltage near the energy system, which may lead to a rise in the voltage input to the air conditioner 30. In this case as well, the AF 33 needs to adjust the voltage input to the air conditioner 30. Therefore, the positions of air conditioning devices 30 that are far from the adjustment means or that are close to the energy system are defined as the positions of air conditioning devices 30 where adjustment of the voltage input to the air conditioning devices 30 by AF33 is required.

[0065] If a negative result is obtained in step 202, if a positive result is obtained in step 203, or if a positive result is obtained in step 204, the mode determination unit 334 determines the operation mode of the AF 33 to be the voltage adjustment mode (S205). Furthermore, if the air conditioning device 30 is not located in a required position (NO in S204), the mode determination unit 334 determines the operation mode of the AF 33 to be the voltage non-adjustment mode (S206).

[0066] Note that the operation mode of the AF 33 is the internal mode before and after the mode determination process. In other words, regardless of whether the voltage adjustment mode or the voltage non-adjustment mode is determined in the mode determination process, the AF 33 continues the internal mode.

[0067] 7 is a flowchart showing the flow of the adjustment process. The adjustment process is a process in which AF 33 adjusts the voltage input to the air conditioning device 30. In this embodiment, when AF 33 is in the internal mode and air conditioning sensor information is newly acquired by the acquisition unit 331, the adjustment process is started. The adjustment determination unit 335 determines whether the mode determination unit 334 is in the voltage adjustment mode (S301). The adjustment determination unit 335 determines whether the mode determination unit 334 is in the voltage adjustment mode by referring to the "mode" indicated in the air conditioning management table (see FIG. 2). Furthermore, if the mode determination unit 334 is in the voltage non-adjustment mode (NO in S301), the adjustment process ends. In this case, the adjustment determination unit 335 determines not to cause AF33 to supply fundamental reactive power for adjusting the voltage input to the air conditioning device 30.

[0068] On the other hand, when the mode determination unit 334 is in the voltage adjustment mode (YES in S301), the adjustment determination unit 335 determines whether or not the subtraction value is greater than 0 (S302). In step 302, the adjustment determination unit 335 calculates the subtraction value from the difference between the "capacity" and the "required reduction current" shown in the air conditioning management table. The adjustment determination unit 335 also determines whether or not the subtraction value calculated by the input voltage specification unit 338 is greater than 0. When the subtraction value is 0 (NO in S302), the adjustment process ends. In this case, the adjustment determination unit 335 determines not to cause AF33 to supply fundamental reactive power for adjusting the voltage input to the air conditioning device 30.

[0069] On the other hand, if the subtracted value is greater than 0 (YES in S302), input voltage identification unit 338 identifies the input voltage (S303). The adjustment determination unit 335 determines whether the input voltage satisfies the adjustment condition (S304). In this embodiment, the adjustment condition is that the input voltage is less than the unnecessary lower limit value Vd or greater than the unnecessary upper limit value Vb. If the input voltage does not satisfy the adjustment condition (NO in S304), the adjustment process ends. In this case, the adjustment determination unit 335 determines not to cause AF33 to supply fundamental reactive power for adjusting the voltage input to the air conditioning device 30.

[0070] On the other hand, if the input voltage satisfies the adjustment condition (YES in S304), the adjustment determination unit 335 determines to cause the AF 33 to supply fundamental wave reactive power in order to adjust the voltage input to the air conditioning device 30. In this case, the input voltage identification unit 338 calculates the power required for adjustment (S305). The supply amount determination unit 339 determines the reactive power index (S306). In this case, the supply amount determination unit 339 first calculates a reference index. Then, the supply amount determination unit 339 determines the ratio of the reactive power index to the reference index based on the relationship between the input voltage and the set Volt-Var curve L (see FIG. 3 and FIG. 5). The supply amount determination unit 339 instructs the supply unit 340 to supply fundamental reactive power (S307). In this case, the supply amount determination unit 339 transmits a reactive power index as a value of the instruction regarding the supply of fundamental reactive power to the supply unit 340. The supply unit 340 supplies fundamental reactive power according to the reactive power index to the power receiving point 30P of the air conditioner 30 (S308).

[0071] The suppression unit 341 determines whether the input voltage is equal to or less than the leading maximum value Ve (S309). The suppression unit 341 determines whether the input voltage is equal to or less than the leading maximum value Ve by referring to "input voltage" in the air conditioning management table. If the input voltage is greater than the leading maximum value Ve (NO in S309), the adjustment process ends. Moreover, when the input voltage is equal to or less than the leading maximum value Ve (YES in S309), the suppression unit 341 instructs the power conversion device 32 to reduce the power supplied from the power conversion device 32 to the adjustment unit 31 (S310). When the input voltage is equal to or lower than the maximum leading value Ve, the supply unit 340 may not be able to sufficiently adjust the voltage input to the air conditioning device 30 simply by supplying fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30. Therefore, in this embodiment, when the input voltage is equal to or lower than the maximum leading value Ve, not only is the supply of fundamental wave reactive power by the supply unit 340 suppressed, but the consumption of active power by the air conditioning device 30 is also suppressed, thereby suppressing a drop in the voltage input to the air conditioning device 30.

[0072] Regardless of whether or not the voltage input to the air conditioning device 30 is adjusted by AF33 in the adjustment process, the supply amount determination unit 339 instructs the supply unit 340 to supply a current required to be reduced in order to reduce the harmonic current in the power receiving path 321. Furthermore, upon receiving the instruction, the supply unit 340 supplies the current required to be reduced to the power receiving path 321.

[0073] Furthermore, in this embodiment, as described above, the adjustment process is started each time the air conditioning sensor information is newly acquired by the acquisition unit 331. Here, after the supply amount determination unit 339 causes the supply unit 340 to supply fundamental reactive power corresponding to the input voltage in the adjustment process, the input voltage may be the same magnitude in the new adjustment process as the input voltage when the previous adjustment process was performed. In this case, the magnitude of the reactive power index determined by the supply amount determination unit 339 in the new adjustment process is the same as the magnitude determined in the previous adjustment process, and the supply unit 340 continues to supply a constant fundamental reactive power to the power receiving point 30P of the air conditioning device 30. However, due to the setting process (see FIG. 4), the relationship between the input voltage and the value determined by the supply amount determination unit 339 as the reactive power index may differ between the previous adjustment process and the new adjustment process. In this case, even if the input voltage is the same value between the previous adjustment process and the new adjustment process, the value determined by the supply amount determination unit 339 as the reactive power index is different.

[0074] In addition, there may be cases where the reduction required current is greater when a new adjustment process is performed than when the previous adjustment process was performed. In this case, in the new adjustment process, the subtraction value is smaller than in the previous adjustment process, and the value determined by the supply amount determination unit 339 as the reactive power index is accordingly lower.

[0075] As described above, in this embodiment, the AF 33 has an internal mode in which fundamental reactive power is supplied from the supply unit 340 to the power receiving point 30P of the input voltage in the air conditioning device 30 according to the magnitude of the input voltage specified from the air conditioning sensor information acquired by the acquisition unit 331. 。 child In this case, even if the magnitude of the voltage input to the air conditioning device 30 fluctuates, the voltage input to the air conditioning device 30 is adjusted. Therefore, compared to a configuration in which the air conditioning device 30 does not operate according to the magnitude of the input voltage, it is possible to prevent a voltage that deviates from the range of equal to or more than the maximum lead voltage Ve and equal to or less than the maximum lag voltage Vc from being input to the air conditioning device 30.

[0076] In addition, in the internal mode, AF33 performs a first control that causes the supply unit 340 to suppress the harmonic current generated by the air conditioning device 30, or performs a second control that performs the first control and also causes the supply unit 340 to supply fundamental reactive power depending on the magnitude of the input voltage. In this case, even if it is necessary to suppress the flow of harmonic current from the air conditioning device 30 but there is no need to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30, it is possible to prevent fundamental reactive power from being supplied to the power receiving point 30P.

[0077] Particularly, in this embodiment, in the internal mode, the AF 33 performs the first control when the magnitude of the input voltage does not satisfy the adjustment condition, and performs the second control when the magnitude of the input voltage satisfies the adjustment condition. In this case, when the supply unit 340 is caused to suppress the outflow of harmonic current from the air conditioning device 30, it is possible to switch whether or not to cause the supply unit 340 to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30 depending on the magnitude of the input voltage.

[0078] In addition, in the internal mode, AF33 has a voltage adjustment mode in which the supply unit 340 is caused to supply fundamental wave reactive power in accordance with the magnitude of the input voltage when the magnitude of the input voltage satisfies the adjustment condition, and a voltage non-adjustment mode in which the supply unit 340 is not caused to supply fundamental wave reactive power in accordance with the magnitude of the input voltage even when the magnitude of the input voltage satisfies the adjustment condition. Here, the voltage regulated mode is regarded as a first supply mode, and the voltage unregulated mode is regarded as a second supply mode. In this case, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 always supplies fundamental reactive power according to the magnitude of the input voltage when the magnitude of the input voltage satisfies the adjustment condition.

[0079] Particularly, in this embodiment, the mode determination unit 334 switches in the internal mode to either the voltage regulation mode or the voltage non-regulation mode depending on the time. In this case, it is possible to suppress the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the time.

[0080] In addition, in the internal mode, the mode determination unit 334 switches to a voltage regulation mode or a voltage non-regulation mode depending on the relationship between the operation of the supply unit 340 and the time. In this case, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the operation time of the supply unit 340.

[0081] In addition, in the internal mode, the mode determination unit 334 switches between a voltage adjustment mode or a voltage non-adjustment mode according to the position information. In this case, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the position relative to the air conditioning device 30, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power.

[0082] Furthermore, the supply amount determination unit 339 determines the reactive power index in consideration of the current that needs to be supplied by the supply unit 340 in order to suppress the outflow of harmonic current from the air conditioning device 30. In other words, in the internal mode, the supply amount determination unit 339 controls the supply of fundamental reactive power by the supply unit 340 based on the suppression of harmonic current by the supply unit 340. In this case, compared to a configuration in which the supply of fundamental reactive power by supply unit 340 is controlled regardless of the suppression of harmonic currents by supply unit 340, the impact of supplying fundamental reactive power by supply unit 340 on the suppression of harmonic currents by supply unit 340 can be reduced.

[0083] Particularly, in this embodiment, the supply amount determination unit 339 determines the reactive power index from a value obtained by subtracting the required reduction current from the capacity of the current that can be supplied by the AF 33. In other words, the supply amount determination unit 339 determines an index related to the fundamental reactive power to be supplied by the supply unit 340 in accordance with the remaining capacity of the supply unit 340 for supplying the fundamental reactive power when the supply unit 340 suppresses the harmonic current in the internal mode. In this case, the voltage input to the air conditioner 30 can be adjusted while ensuring the capacity of the supply unit 340 required to suppress harmonic currents.

[0084] In this embodiment, in the setting process (see FIG. 4), the supply amount determination unit 339 sets the relationship between the input voltage and the reactive power index according to the time period to which the current time belongs (see FIG. 5). Then, the supply amount determination unit 339 determines the reactive power index from the set relationship. In other words, in the internal mode, the supply amount determination unit 339 determines the index related to the fundamental reactive power to be supplied by the supply unit 340 according to the time period related to the supply of fundamental reactive power by the supply unit 340. In this case, the voltage input to the air conditioner 30 can be adjusted depending on the degree of adjustment according to the timing of the supply of fundamental reactive power by the supply unit 340.

[0085] Furthermore, in the internal mode, the supply amount determination unit 339 determines an index related to the fundamental reactive power to be supplied by the supply unit 340 in accordance with the position information. In this case, the voltage input to the air conditioner 30 can be adjusted depending on the degree of adjustment according to the position relative to the air conditioner 30.

[0086] Furthermore, in the internal mode, the suppression unit 341 suppresses the consumption of active power by the air conditioner 30 when the input voltage identified from the air conditioning sensor information is equal to or lower than the leading maximum value Ve. In this case, compared to a configuration in which the air conditioning device 30 adjusts the voltage input to the air conditioning device 30 by only supplying fundamental wave reactive power, it is possible to prevent a voltage less than the maximum lead value Ve from being input to the air conditioning device 30.

[0087] The air conditioning sensor information is information created from the results of detection of the voltage in the air conditioner 30 by the air conditioning sensor 30S. In this case, it is possible to realize the supply of fundamental reactive power by the air conditioning device 30 according to the magnitude of the input voltage without using a detection means separate from the air conditioning device 30 to detect the voltage in the air conditioning device 30.

[0088] Moreover, the supplying means for supplying the fundamental wave reactive power is the AF 33 that suppresses the harmonic current generated by the operation of the power conversion device 32 . In this case, even when the adjustment unit 31 and the power conversion device 32 are not operating, it is possible to realize the supply of fundamental reactive power to the power receiving point 30P of the air conditioner 30.

[0089] In this embodiment, the magnitude of the fundamental reactive power supplied by the supply unit 340 to the power receiving point 30P in accordance with the input voltage is determined in advance from the relationship between the reference index, the input voltage, and the Volt-Var curve L. In other words, the fundamental reactive power supplied by the supply unit 340 is determined in advance in accordance with the magnitude of the input voltage. In this case, if the voltage input to the air conditioning device 30 is not adjusted even when the supply unit 340 supplies fundamental wave reactive power, it is possible to prevent the supply unit 340 from approaching its operating limit, compared to a configuration in which the amount of fundamental wave reactive power supplied by the supply unit 340 is increased.

[0090] (Modification of Adjustment Process) Next, a modified example of the adjustment process will be described. In this embodiment, it has been described that AF33 operates to prioritize suppression of harmonic current outflow from air conditioning device 30 over adjustment of the voltage input to air conditioning device 30, regardless of the input voltage, but this is not limited to the above. FIG. 8 is a flowchart showing the flow of an adjustment process according to a modified example. In FIG. 8, steps 401, 402, 403, and 404 are the same as steps 301, 303, 304, and 305 in the adjustment process shown in FIG. 7, respectively, and therefore their explanation will be omitted.

[0091] The supply amount determination unit 339 judges whether the input voltage satisfies the priority condition (S405). The priority condition is a condition used by the supply amount determination unit 339 to judge whether to prioritize suppression of harmonic current in the air conditioner 30 or adjustment of the voltage input to the air conditioner 30. In this embodiment, the priority condition is determined from the viewpoint of the supply amount determination unit 339 determining whether to prioritize suppression of harmonic current in the air conditioner 30 or adjustment of the voltage input to the air conditioner 30 according to the magnitude of the input voltage. Also, in this embodiment, the priority condition is determined such that the input voltage is equal to or less than the leading maximum value Ve or equal to or more than the lagging maximum value Vc.

[0092] If the input voltage satisfies the priority condition (YES in S405), the supply amount determination unit 339 determines the reactive power index by prioritizing adjustment of the voltage input to the air conditioner 30 over suppression of harmonic current in the air conditioner 30 (S406). In this case, the supply amount determination unit 339 may determine the power requiring adjustment or the reactive current constituting the power requiring adjustment as the reactive power index. Then, the supply amount determination unit 339 may determine the current to be supplied by the supply unit 340 in order to suppress harmonic current in the air conditioner 30, depending on the capacity remaining in the supply unit 340 when the supply unit 340 is made to supply the power requiring adjustment. Moreover, if the input voltage does not satisfy the priority condition (NO in S405), the supply amount determination unit 339 determines the reactive power index by prioritizing suppression of harmonic current in the air conditioner 30 over adjustment of the voltage input to the air conditioner 30 (S407). In this case, the supply amount determination unit 339 may determine the reactive power index by the same method as the adjustment process shown in FIG.

[0093] When the input voltage is less than the rated value Va, the lower the input voltage, the greater the power required for adjustment. Also, when the input voltage is higher than the rated value Va, the higher the input voltage, the greater the power required for adjustment. In these cases, even if the input voltage is equal to or less than the maximum leading value Ve or equal to or more than the maximum lagging value Vc, if suppression of harmonic current in the air conditioning device 30 is prioritized over adjustment of the voltage input to the air conditioning device 30, the adjustment of the voltage input to the air conditioning device 30 is likely to be insufficient. Therefore, in this embodiment, when the input voltage is equal to or less than the maximum leading value Ve or equal to or more than the maximum lagging value Vc, adjustment of the voltage input to the air conditioning device 30 is prioritized over suppression of harmonic current. In this case, even if the power required for adjustment is large, the voltage input to the air conditioning device 30 is more likely to be adjusted.

[0094] The supply amount determination unit 339 instructs the supply unit 340 to supply fundamental wave reactive power (S408). In this case, the supply amount determination unit 339 transmits a reactive power index as a value of the instruction regarding the supply of fundamental wave reactive power to the supply unit 340. The supply unit 340 supplies fundamental reactive power according to the reactive power index to the power receiving point 30P of the air conditioner 30 (S409).

[0095] The suppression unit 341 determines whether or not the fundamental reactive power identified from the reactive power index is less than the power requiring adjustment (S410). If a negative result is obtained (NO in S410), the adjustment process ends. On the other hand, if the fundamental reactive power identified from the reactive power index is less than the power required for adjustment (YES in S410), the suppression unit 341 instructs the power conversion device 32 to reduce the power that the power conversion device 32 supplies to the adjustment unit 31 (S411).

[0096] As described above, in the modified example, in the internal mode, if the adjustment condition set for the magnitude of the input voltage is satisfied but the priority condition set for the magnitude of the input voltage is not satisfied, the first control is prioritized over the third control, and if the priority condition is satisfied, the third control is prioritized over the first control. Here, the first control is, as described above, a control that causes the supply unit 340 to suppress harmonic currents generated by the air conditioning device 30. Also, the third control is a control that causes the supply unit 340 to supply fundamental reactive power according to the magnitude of the input voltage. In this case, it is possible to switch between prioritizing control that causes the supply unit 340 to suppress the harmonic current generated by the air conditioning device 30, and control that causes the supply unit 340 to supply fundamental reactive power depending on the magnitude of the input voltage, depending on the magnitude of the input voltage.

[0097] In this disclosure, it has been explained that in the setting process (see FIG. 4), the supply amount determination unit 339 does not change the unnecessary upper limit value Vb and the maximum delay value Vc from the set values ​​when the current time is not a high pressure period, but this is not limited to this. The supply amount determination unit 339 may reset the unnecessary upper limit value Vb and the delay maximum value Vc to values ​​that are a first percentage higher than the set values ​​and reset the delay reference indicator Qa to a value that is a first percentage lower than the set values ​​when the current time is not a high pressure period. Furthermore, the supply amount determination unit 339 may reset the unnecessary lower limit value Vd, the advance maximum value Ve, and the advance reference indicator Qb to values ​​that are a second percentage lower than the set values ​​when the current time is not a low pressure period. Furthermore, the supply amount determination unit 339 may reset the unnecessary upper limit value Vb and the delay maximum value Vc to values ​​that are a third percentage higher than the set values ​​and reset the delay reference indicator Qa to a value that is a third percentage lower than the set values ​​when the air conditioning device 30 is not located in a high pressure position. Furthermore, the supply amount determination unit 339 may reset the unnecessary lower limit value Vd, the advance maximum value Ve, and the advance reference indicator Qb to values ​​that are a fourth percentage lower than the set values ​​when the air conditioning device 30 is not located in a low pressure position.

[0098] In addition, in the present disclosure, it has been described that the unnecessary upper limit value Vb, the maximum delay value Vc, and the delay reference index Qa are determined in the setting process depending on whether the current time is a high pressure period or not. Also, in the setting process, it has been described that the unnecessary lower limit value Vd, the maximum advance value Ve, and the advance reference index Qb are determined in the setting process depending on whether the current time is a low pressure period or not, but this is not limiting. The supply amount determination unit 339 may set the unnecessary upper limit value Vb, the delay maximum value Vc, and the delay reference indicator Qa depending on whether the current time is a holiday or not. The supply amount determination unit 339 may also set the unnecessary lower limit value Vd, the advance maximum value Ve, and the advance reference indicator Qb depending on whether the current time is a weekday or not.

[0099] Further, in the present disclosure, it has been described that the fundamental reactive power supplied by the supply unit 340 is determined in advance according to the magnitude of the input voltage, but this is not limiting. The supply amount determination unit 339 may determine the reactive power index according to the result of the supply unit 340 supplying fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30. More specifically, the supply amount determination unit 339 may change the reactive power index so that the voltage input to the air conditioning device 30 when the supply unit 340 is caused to supply fundamental wave reactive power approaches the rated value Va.

[0100] In addition, in the present disclosure, the supply amount determination unit 339 determines the reactive power index in accordance with the reference index, the input voltage, and the Volt-Var curve L, but this is not limiting. The supply amount determination unit 339 may determine the reactive power index so as to be proportional to the magnitude of the difference between the input voltage and the rated value Va.

[0101] Also, in the present disclosure, it has been described that when the input voltage satisfies the priority condition, the supply amount determination unit 339 prioritizes adjustment of the voltage input to the air conditioning device 30 over suppression of harmonic current in the air conditioning device 30, but this is not limited to the above. The supply amount determination unit 339 may determine whether to prioritize suppression of harmonic current in the air conditioner 30 or adjustment of the voltage input to the air conditioner 30, depending on the current required to be reduced and the input voltage. As an example, when the current required to be reduced is equal to or greater than a predetermined value, the supply amount determination unit 339 may prioritize suppression of harmonic current in the air conditioner 30 over adjustment of the voltage input to the air conditioner 30, even if the input voltage satisfies the priority condition. Furthermore, when the current required to be reduced is less than a predetermined value and the input voltage satisfies the priority condition, the supply amount determination unit 339 may prioritize adjustment of the voltage input to the air conditioner 30 over suppression of harmonic current in the air conditioner 30.

[0102] Further, in the present disclosure, it has been described that the supply amount determination unit 339 determines the reactive power index depending on the magnitude of the input voltage, but this is not limiting. When the input voltage satisfies the adjustment condition, the supply amount determination unit 339 may cause the supply unit 340 to supply fundamental reactive power having a predetermined magnitude regardless of the magnitude of the input voltage. In other words, the supply amount determination unit 339 may be configured to determine whether or not to cause the supply unit 340 to supply fundamental reactive power depending on the magnitude of the input voltage, and may not need to determine the reactive power index depending on the magnitude of the input voltage.

[0103] Further, in the present disclosure, it has been described that the input voltage identifying unit 338 identifies the input voltage from air conditioning sensor information, but this is not limiting. The input voltage identifying unit 338 may calculate the input voltage from the voltage at the power consuming facility 20. In this case, the facility sensor 20S may detect the voltage at the power receiving point 20P of the power consuming facility 20, and transmit facility sensor information indicating the detected voltage to the air conditioning device 30. In this case, the facility sensor information is regarded as voltage information related to the input voltage. Furthermore, a detection means different from the facility sensor 20S may be provided in the voltage regulating system 1, and this detection means may detect the voltage at the power receiving point 20P of the power consuming facility 20, and transmit facility sensor information indicating the detected voltage to the air conditioning device 30. Then, the input voltage identifying unit 338 may identify the input voltage from the acquired facility sensor information. Furthermore, a detection means for detecting a voltage outside the power consuming facility 20 may be provided in the voltage regulating system 1, and this detection means may detect a voltage outside the power consuming facility 20, and transmit outside-facility information indicating the detected voltage to the air conditioning device 30. Then, the input voltage identifying unit 338 may identify the input voltage from the acquired outside-facility ... In these cases, the information detected by the detection means is taken as voltage information regarding the input voltage.

[0104] Also, in the present disclosure, it has been described that the voltage information used by the input voltage identification unit 338 to identify the input voltage is air conditioning sensor information, facility sensor information, or the like. Here, the voltage information may be information indicating a DC voltage in the power receiving path 321, or may be information indicating an AC voltage in the power receiving path 321. Furthermore, the voltage information may be information indicating a DC voltage in AF33, or may be information indicating an AC voltage in AF33. In addition, the voltage information may be any information related to the input voltage, as long as it is information used for identifying the input voltage by the input voltage identifying unit 338. Furthermore, the air conditioning sensor 30S may detect the input voltage, and create air conditioning sensor information including information indicating the detected input voltage. In other words, the voltage information may be information indicating the input voltage.

[0105] Further, in the present disclosure, it has been described that the location information is information indicating the location of the air conditioning device 30, but this is not limited to this. The location information may also be information indicating the location of the power consuming facility 20 in which the air conditioning device 30 is installed. In other words, the location of the object indicated in the location information may be the location of the power consuming facility 20 in which the air conditioning device 30 is installed. In addition, the location information may be information indicating the location of an object other than the air conditioning device 30, so long as it is information related to the location of the air conditioning device 30.

[0106] In addition, in the present disclosure, the acquisition unit 331 has been described as acquiring both the voltage information and the position information, but this is not limited thereto. An acquisition means different from the acquisition unit 331 may be provided in the AF 33, and one of the acquisition unit 331 and the acquisition means different from the acquisition unit 331 may acquire the voltage information, and the other may acquire the position information. In other words, the voltage information acquisition means and the position information acquisition means may be different functional units.

[0107] Also, in the present disclosure, it has been described that a plurality of air conditioning apparatuses 30 may be provided in the power consuming facility 20. Here, the plurality of air conditioning apparatuses 30 provided in the power consuming facility 20 may each supply fundamental reactive power to a power receiving point 30P of one air conditioning apparatus 30 provided in the power consuming facility 20, thereby adjusting the voltage input to this one air conditioning apparatus 30. In this case, a management server (not shown) that manages the plurality of air conditioning apparatuses 30 may instruct each of the plurality of air conditioning apparatuses 30 to select the air conditioning apparatus 30 as the supply destination of the fundamental reactive power. In this case, the voltage input to the air conditioner 30 is easier to adjust compared to when adjusting the voltage input to the air conditioner 30 using only one air conditioner 30. Therefore, when adjusting the voltage input to the air conditioner 30, even if adjustment of the voltage input to the air conditioner 30 cannot be achieved by the operation of one air conditioner 30, it is sufficient that the air conditioner 30 is configured to supply fundamental reactive power.

[0108] Further, in the present disclosure, the AF 33 has been described as supplying fundamental wave reactive power to the power receiving point 30P of the air conditioning apparatus 30, but the present invention is not limited to this. The power conversion device 32 provided with a PWM converter or a matrix converter may supply fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30. The PWM converter is a converter that controls the waveform of an input current. The matrix converter is a converter that converts AC power having a specific frequency into AC power having a frequency different from the specific frequency. In addition, the power conversion device 32 may have the functions of an acquisition unit 331, a storage unit 332, a measurement unit 333, a mode determination unit 334, an adjustment determination unit 335, a harmonic determination unit 336, a reactive power determination unit 337, an input voltage determination unit 338, a supply amount determination unit 339, a supply unit 340, and a suppression unit 341. The power conversion device 32 may supply fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30 according to the magnitude of the input voltage. In this case, the power conversion device 32 is also regarded as a supply means that supplies fundamental wave reactive power.

[0109] Second embodiment The second embodiment will be described below. The second embodiment is common to the first embodiment in that the air conditioning device 30 supplies fundamental reactive power to the power receiving point 30P of the air conditioning device 30. On the other hand, the second embodiment differs from the first embodiment in the control mode of AF 33. More specifically, the second embodiment differs from the first embodiment in that AF 33 has not only an internal mode but also a mode in which fundamental reactive power is supplied to the power receiving point 30P of the air conditioning device 30 based on information from a sensor provided outside the power consuming facility 20. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and the description of the components similar to those in the first embodiment may be omitted.

[0110] FIG. 9 is a diagram showing an example of a voltage regulating system 1 according to the second embodiment. A voltage regulating system 1, which is an example of a control system, is provided with a power grid DS, a plurality of power consuming facilities 20, and a control server 50. The electric power system DS is a system equipped with facilities for supplying electric power to electric power consumers. The electric power system DS includes a power plant 10, a transmission line 12, a supply-side substation 13, a supply-side distribution line 14, an automatic voltage regulator (SVR: Step Voltage Regulator) 15, a receiving-side substation 16, a receiving-side distribution line 17, a pole transformer 18, and a consumer-side distribution line 19.

[0111] The power plant 10 is a facility that generates electric power. Examples of the power plant 10 include a thermal power plant, a hydroelectric power plant, a nuclear power plant, a solar power plant, a wind power plant, and a geothermal power plant. The power transmission line 12 is a line through which current that constitutes the power generated in the power plant 10 flows. The power transmission line 12 is installed from the power plant 10 to a supply-side substation 13.

[0112] The supply-side substation 13 is a facility that converts voltage. The supply-side substation 13 is provided on the power supply side of the power-receiving substation 16. In this embodiment, the facility located closest to the power supply side is the power plant 10. Moreover, the facilities located closest to the power receiving side are two power consumption facilities 20 connected to the customer-side distribution line 19. Supply-side substation 13 converts the voltage supplied through transmission line 12. Examples of supply-side substation 13 include a substation that converts a voltage of 500,000 V to 154,000 V, a substation that converts a voltage of 154,000 V to 66,000 V, a substation that converts a voltage of 66,000 V to 22,000 V, and the like.

[0113] Supply-side distribution line 14 is a line through which a current flows when a converted voltage is applied to supply-side substation 13. Supply-side distribution line 14 is provided from supply-side substation 13 to receiving-side substation 16. Supply-side distribution line 14 is provided on the power supply side of receiving-side distribution line 17. The SVR 15 adjusts the voltage supplied to the supply-side distribution line 14. More specifically, the SVR 15 detects the voltage supplied to the supply-side distribution line 14. If the detected voltage is not within a predetermined range, the SVR 15 adjusts the voltage so that the voltage falls within the predetermined range. Note that the voltage regulating system 1 may be provided with a static var compensator (SVC) instead of the SVR 15. The SVC adjusts the voltage supplied to the supply-side distribution line 14. More specifically, the SVC continuously adjusts reactive power from the lagging direction to the leading direction so that the voltage in the supply-side distribution line 14 falls within a predetermined range. Note that the voltage regulating system 1 may be provided with both the SVR 15 and the SVC. The receiving-side substation 16 is a facility that converts the voltage supplied through the supply-side distribution line 14. An example of the receiving-side substation 16 is a substation that converts the supplied voltage to 6600V.

[0114] The receiving-side distribution line 17 is a line through which a current flows when a converted voltage is applied to the receiving-side substation 16. The receiving-side distribution line 17 is provided from the receiving-side substation 16 to the pole transformer 18. In this embodiment, two receiving-side distribution lines 17 are provided. Pole transformer 18, which is an example of a distribution transformer, is equipment that converts the voltage supplied through receiving-side distribution line 17. Examples of pole transformer 18 include a transformer that converts a voltage of 6600 V to 200 V, and a transformer that converts a voltage of 6600 V to 100 V. In this embodiment, two pole transformers 18 are provided.

[0115] The consumer-side distribution line 19 is a line through which a current flows when a voltage converted by the pole transformer 18 is applied to the consumer-side distribution line 19. In this embodiment, two consumer-side distribution lines 19 are provided. As described above, the power grid DS is a system for distributing generated electricity to electricity consumers. Therefore, the power grid DS can also be considered as a distribution system. When the transmission line 12, the supply side distribution line 14, the receiving side distribution line 17, and the consumer side distribution line 19 are described without making any particular distinction, they may be simply referred to as "electric lines." Furthermore, in this embodiment, the power supplied from the power plant 10 is received by the air conditioning device 30 of the power consumption facility 20 via the supply side distribution line 14, the receiving side distribution line 17, and the consumer side distribution line 19. Therefore, the supply side distribution line 14, the receiving side distribution line 17, and the consumer side distribution line 19 can be regarded as electric circuits of the power system DS that are electrically connected to the air conditioning device 30.

[0116] Further, a plurality of electric wire sensors 10S are provided in the voltage regulating system 1. In this embodiment, the electric wire sensors 10S are connected to the supply-side electric power distribution line 14, the receiving-side electric power distribution line 17, and the consumer-side electric power distribution line 19. In other words, the electric wire sensor 10S is provided for each of the supply-side electric power distribution line 14, the receiving-side electric power distribution line 17, and the consumer-side electric power distribution line 19.

[0117] The electric wire sensor 10S detects parameters related to apparent power in the connected electric wire. The parameters related to apparent power are parameters that affect the apparent power. Examples of the parameters related to apparent power include apparent power, reactive power, harmonic voltage, current, voltage, power factor, and the amount of apparent power and reactive power in a predetermined period. The current as a parameter related to apparent power includes harmonic current. The harmonic voltage and harmonic current may be harmonic voltage and harmonic current of a specific order. The specific order may be any order, for example, the fifth order. Examples of the parameters related to apparent power include total harmonic distortion (THD) of current and THD of voltage. Here, the THD of current is calculated from the following formula (1). The THD of voltage is calculated from the following formula (2). TIFF0007659197000001.tif28151

[0118] In the above formula (1), I1 is the fundamental current. nis the nth harmonic current. In the above formula (2), V1 is the fundamental wave voltage. n is the nth harmonic voltage. The electric wire sensor 10S detects the above parameters related to the apparent power, for example, at predetermined time intervals. The predetermined time may be any time, but is, for example, one hour. When the electric wire sensor 10S detects the parameters related to the apparent power, the electric wire sensor 10S creates information related to the apparent power based on the result of this detection. The information related to the apparent power created in the electric wire sensor 10S may be referred to as electric wire information hereinafter. The electric wire information may be information indicating parameters detected by the electric wire sensor 10S related to the apparent power in the electric wire. The electric wire information may also be information indicating a waveform of a current detected by the electric wire sensor 10S in the electric wire. When the electric wire sensor 10S creates the electric wire information, the electric wire sensor 10S transmits the created electric wire information to the control server 50 together with electric wire identification information for identifying the electric wire that is the subject of the electric wire information.

[0119] Moreover, in this embodiment, four power consuming facilities 20 are provided. In this embodiment, a power consuming facility 20 is connected to each of the two receiver-side power distribution lines 17, and a power consuming facility 20 is connected to each of the two customer-side power distribution lines 19. Each power consuming facility 20 is provided with a facility sensor 20S, an air conditioning device 30, and a load 40, similar to the example shown in FIG. 1 .

[0120] Moreover, the AF33 of the air conditioning device 30 of this embodiment adjusts parameters related to the apparent power in the electric wire by supplying a current to the electric wire. Examples of parameters related to the apparent power in the electric wire include harmonic current in the electric wire, reactive power in the electric wire, power factor of the electric wire, and voltage of the electric wire. Here, the apparent power in the electric wire also changes as the parameters related to the apparent power in the electric wire change. Therefore, the adjustment of the above parameters related to the apparent power in the electric wire can be broadly understood as adjustment of the apparent power. Hereinafter, the parameters related to the apparent power to be adjusted may be collectively referred to as "apparent power."

[0121] The numbers of power plants 10, transmission lines 12, supply side substations 13, receiving side substations 16, pole transformers 18, and consumer side distribution lines 19 provided in the power system DS are not limited to the illustrated example. The numbers of power plants 10, transmission lines 12, supply side substations 13, receiving side substations 16, pole transformers 18, and consumer side distribution lines 19 provided in the power system DS may be greater than or less than the illustrated example. In addition, when the number of target facilities among the power plants 10, transmission lines 12, supply side substations 13, receiving side substations 16, pole transformers 18, and consumer side distribution lines 19 is less than the illustrated example, this also includes the case where the target facilities are not provided. Furthermore, the number of supply-side distribution lines 14 and receiving-side distribution lines 17 is not limited to the example shown in the figure. The power system DS may be provided with more supply-side distribution lines 14 and receiving-side distribution lines 17 than those shown in the figure. In this case, the electric wire sensor 10S may be provided for each supply-side distribution line 14, or the electric wire sensor 10S may be provided for each receiving-side distribution line 17. Furthermore, the number of power consuming facilities 20 is not limited to the illustrated example. The voltage regulating system 1 may be provided with more power consuming facilities 20 than the illustrated number. Furthermore, each power consuming facility 20 may be provided with a plurality of air conditioning devices 30.

[0122] Furthermore, the parameter detected by the electric wire sensor 10S is not limited to one type of parameter related to apparent power. The electric wire sensor 10S may detect multiple types of parameters among the above-mentioned parameters. Then, electric wire information indicating each of the multiple types of detected parameters may be transmitted to the control server 50. Furthermore, an electric wire sensor 10S may be provided for each type of parameter to be detected.

[0123] The control server 50 is a server device that controls the operation of the air conditioning device 30. More specifically, the control server 50 controls the operation of the air conditioning device 30 to adjust the apparent power in the power lines. The control server 50 is realized, for example, by a computer. The control server 50 may be configured by a single computer, or may be realized by distributed processing using multiple computers. In addition, the control server 50 may be realized on virtual hardware provided by cloud computing.

[0124] In this embodiment, the control server 50, the electric wire sensors 10S, and the air conditioning devices 30 are connected via a network (not shown). The network connecting the control server 50, the electric wire sensors 10S, and the air conditioning devices 30 may be capable of transmitting and receiving data. Furthermore, the communication line used for transmitting and receiving data may be wired or wireless, or may be power line communication (PLC). Furthermore, a configuration in which the communication destination is connected via multiple networks or communication lines may be used. Furthermore, the number of control servers 50 is not limited to the example shown in the figure. Two or more control servers 50 may be provided in the voltage regulating system 1. Furthermore, a control server 50 may be provided for each power consuming facility 20, for example.

[0125] FIG. 10 is a diagram showing the hardware configuration of the control server 50. As shown in FIG. The control server 50 is provided with a CPU 51, a ROM (Read Only Memory) 52, and a RAM (Random Access Memory) 53. The control server 50 is also provided with a storage device 55 that is configured with a hard disk device or the like and stores information. The control server 50 is also provided with a communication device 54 (communication I / F) that communicates with the outside. In addition, the control server 50 is provided with input devices such as a keyboard and a mouse used for inputting information, and a display device such as a liquid crystal display.

[0126] The ROM 52 and the storage device 55 store programs executed by the CPU 51. The CPU 51 reads out the programs stored in the ROM 52 or the storage device 55, and executes the programs using the RAM 53 as a working area. The CPU 51 executes programs stored in the ROM 52 and the storage device 55 to realize each of the functional units described below.

[0127] Here, the program executed by the CPU 51 can be provided to the control server 50 in a state where it is stored in a computer-readable recording medium such as a magnetic recording medium (magnetic tape, magnetic disk, etc.), an optical recording medium (optical disk, etc.), a magneto-optical recording medium, a semiconductor memory, etc. Also, the program executed by the CPU 51 may be provided to the control server 50 using a communication means such as the Internet.

[0128] FIG. 11 is a diagram showing the functional configuration of the control server 50. As shown in FIG. The control server 50 includes an information acquisition unit 501 , a storage unit 502 , a mode control unit 503 , an index calculation unit 504 , and an instruction unit 505 .

[0129] The information acquiring unit 501, which is an example of an acquiring means, acquires information transmitted to the control server 50. As an example, the information acquiring unit 501 acquires electric wire information transmitted from the electric wire sensor 10S to the control server 50. The information acquired by the information acquiring unit 501 is stored in the storage unit 502. The memory unit 502 stores information.

[0130] The mode control unit 503 determines a mode for controlling the operation of the AF33 in the air conditioning device 30. The mode control unit 503 has an internal mode and an external mode. The external mode is a mode in which the AF33 supplies fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30 based on information from a sensor provided outside the power consuming facility 20. In addition, an example of a sensor provided outside the power consuming facility 20 is the electric wire sensor 10S. In addition, the mode control unit 503 of this embodiment determines the mode for controlling the operation of the AF33 to be either the internal mode or the external mode based on a predetermined condition.

[0131] When the mode control unit 503 is in the external mode, the control server 50 calculates an index related to the power that needs to be supplied to the electric wire to improve the apparent power in the electric wire, based on the electric wire information acquired from the electric wire sensor 10S. Then, the control server 50 instructs the air conditioning device 30 to supply apparent power by transmitting the calculated index to the air conditioning device 30 as an instruction value for the supply of apparent power. Note that, hereinafter, an index related to the power that needs to be supplied to the electric wire to improve the apparent power in the electric wire may be referred to as an adjustment necessity index. Examples of the adjustment necessity index include power, current, etc. that need to be supplied to the electric wire to improve the apparent power in the electric wire. Furthermore, when the mode control unit 503 is in the internal mode, the control server 50 does not calculate the adjustment necessity index based on the power line information. In this case, the control server 50 instructs the air conditioning device 30 to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30 based on information from a sensor installed inside the power consuming facility 20.

[0132] The index calculation unit 504 calculates an adjustment necessity index when the mode control unit 503 is in the external mode. The index calculation unit 504 calculates an adjustment necessity index for the electric wire to be adjusted based on the latest electric wire information for the electric wire. The following describes an example of a method for calculating the adjustment necessity index by the index calculation unit 504. The index calculation unit 504 calculates the adjustment necessity index to be larger as the difference between the apparent power indicated in the latest electric wire information for the electric wire to be adjusted and a predetermined reference value for the apparent power of the electric wire to be adjusted is larger. When the mode control unit 503 is in the internal mode, the index calculation unit 504 does not calculate the adjustment necessary index.

[0133] When the mode control unit 503 is in the external mode, the instruction unit 505 transmits the adjustment necessity index calculated by the index calculation unit 504 to the air conditioning device 30 as an instruction value for the supply of apparent power, thereby instructing the air conditioning device 30 to supply apparent power. Also, when the mode control unit 503 is in the internal mode, the instruction unit 505 instructs the air conditioning device 30 to supply fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30, based on information from a sensor provided inside the power consuming facility 20.

[0134] FIG. 12 is a flowchart showing the flow of the air conditioning control process. The air conditioning control process is a process in which the control server 50 controls the air conditioner 30. In this embodiment, the air conditioning control process is started when a predetermined time has elapsed. The predetermined time may be any time, but is, for example, one hour. The air conditioning control process is performed for each electric wire. Note that, hereinafter, an electric wire that is the target of the air conditioning control process may be referred to as a target electric wire.

[0135] The mode control unit 503 determines whether an information condition is satisfied (S501). The information condition is a condition determined for the mode control unit 503 to determine whether to control to the external mode or the internal mode. The information condition is determined for electric wire information. In this embodiment, two conditions are determined as the information condition.

[0136] The first information condition is that the latest electric wire information about the target electric wire is acquired by the information acquisition unit 501. If an abnormality occurs in the network connecting the control server 50 and the electric wire sensor 10S, the electric wire information transmitted from the electric wire sensor 10S may not be received by the control server 50. If the information acquisition unit 501 has not acquired the latest electric wire information at the time when the electric wire information about the target electric wire should be received by the control server 50, the mode control unit 503 determines that the information condition is not satisfied.

[0137] The second information condition is that the index calculation unit 504 is able to calculate the adjustment necessity index based on the latest electric wire information. Even if an abnormality occurs in the network connecting the control server 50 and the electric wire sensor 10S, part of the electric wire information transmitted from the electric wire sensor 10S may be received by the control server 50. On the other hand, in this case, the content of the electric wire information received by the control server 50 may not be normal because not all of the electric wire information is received by the control server 50, etc. Then, when the content of the electric wire information is abnormal and therefore the index calculation unit 504 is not able to calculate the adjustment necessity index based on the electric wire information, the mode control unit 503 determines that the information condition is not satisfied.

[0138] It should be noted that if either of the two conditions defined as the information conditions is not satisfied, the adjustment necessity index based on the latest power wire information is not transmitted to the air conditioning device 30. Therefore, the information condition can also be understood as the adjustment necessity index being acquired by the acquisition unit 331 of the air conditioning device 30. In other words, the information condition can also be understood as a condition defined for the adjustment necessity index.

[0139] When the mode control unit 503 determines that the information condition is satisfied (YES in S501), the mode control unit 503 determines the mode for controlling the operation of the AF 33 to be the external mode (S502). The index calculation unit 504 determines whether or not the apparent power of the target electric wire needs to be adjusted (S503). The index calculation unit 504 determines whether or not the apparent power of the target electric wire needs to be adjusted based on whether or not the difference between the apparent power indicated in the latest electric wire information for the target electric wire and a reference value set for the apparent power of the target electric wire is equal to or greater than a predetermined value. If the index calculation unit 504 determines that adjustment of the apparent power in the target electric line is not necessary (NO in S503), the air conditioning control process ends. In this case, the air conditioner 30 does not adjust the apparent power in the electric line.

[0140] On the other hand, if the index calculation unit 504 determines that the apparent power in the target electric wire needs to be adjusted (YES in S503), the index calculation unit 504 calculates an adjustment necessity index based on the latest electric wire information (S504). The instruction unit 505 transmits an instruction to the air conditioner 30 for controlling the air conditioner 30 in the external mode (S505). An instruction for controlling the air conditioner 30 in the external mode may be referred to below as an external instruction. Furthermore, the air conditioner 30 to which the instruction unit 505 gives an instruction may be referred to below as a target device. The external instruction includes an instruction to set the mode for controlling the operation of the AF 33 to the external mode. Furthermore, the external instruction includes the adjustment necessity index calculated by the index calculation unit 504 as an instruction value for the supply of apparent power.

[0141] Furthermore, when the mode control unit 503 determines that the information condition is not satisfied (NO in S501), the mode control unit 503 determines the mode for controlling the operation of the AF 33 to be the internal mode (S506). The instruction unit 505 transmits an instruction to the air conditioner 30 for controlling the air conditioner 30 in the internal mode (S507). An instruction for controlling the air conditioner 30 in the internal mode may be referred to as an internal instruction below. The internal instruction includes an instruction to set the mode for controlling the operation of the AF 33 to the internal mode.

[0142] Furthermore, in this embodiment, the air conditioning apparatus 30 to be instructed by the instruction unit 505 is the air conditioning apparatus 30 in the power consuming facility 20 connected to the target electric line. The air conditioning apparatus 30 to be instructed by the instruction unit 505 may be an air conditioning apparatus 30 provided on the power receiving side of the target electric line. In this case, in the air conditioning control process in which the receiving-side electric power distribution line 17 is the target electric line, the air conditioning apparatus 30 to be instructed by the instruction unit 505 is the air conditioning apparatus 30 connected to the target electric line and the air conditioning apparatus 30 connected to the target electric line via the consumer-side electric power distribution line 19. In addition, in the air conditioning control process in which the supply-side electric power distribution line 14 is the target electric line, the air conditioning apparatus 30 to be instructed by the instruction unit 505 is the air conditioning apparatus 30 connected to the target electric line via the receiving-side electric power distribution line 17 and the consumer-side electric power distribution line 19. In other words, in the illustrated example, in the air conditioning control process in which the supply-side electric power distribution line 14 is the target electric line, the air conditioning apparatus 30 to be instructed by the instruction unit 505 is all the air conditioning apparatuses 30 provided in the voltage adjustment system 1. Furthermore, the air conditioning apparatus 30 to be instructed by the instructing unit 505 may be an air conditioning apparatus 30 provided on the power supply side of the target power line. As an example, when the customer-side power distribution line 19 is the target power line, the instructing unit 505 may transmit an instruction to the air conditioning apparatus 30 of the power consuming facility 20 connected to the receiving-side power distribution line 17, thereby causing the air conditioning apparatus 30 to supply apparent power to the customer-side power distribution line 19.

[0143] In the present embodiment, the air conditioning control process is performed for each electric wire. In this case, the mode for controlling the operation of AF33 in the target device is determined to be the internal mode or the external mode for each electric wire. However, the mode for controlling the operation of AF33 in the target device may not be determined for each electric wire. The mode for controlling the operation of AF33 in the target device may be determined to be the internal mode or the external mode as a common mode for each electric wire.

[0144] Fig. 13 is a flowchart showing the flow of mode control processing. The mode control processing is processing in which the mode determination unit 334 of the air conditioning device 30 determines a mode for controlling the operation of the AF 33. In this embodiment, when the acquisition unit 331 of the air conditioning device 30 acquires an external instruction or an internal instruction (see Fig. 12), the mode control processing is started. The mode determination unit 334 determines whether or not the instruction acquired by the acquisition unit 331 is an external instruction (S601).

[0145] If the instruction acquired by the acquisition unit 331 is an external instruction (YES in S601), the mode determination unit 334 determines the mode for controlling the operation of the AF 33 to be the external mode (S602). The adjustment decision unit 335 restricts the adjustment process (see FIGS. 7 and 8) (S603). In other words, in the external mode, even if the air conditioning sensor information is newly acquired by the acquisition unit 331, the adjustment process is not executed.

[0146] When the instruction acquired by the acquisition unit 331 is an external instruction, this external instruction includes an adjustment necessity index. Then, the supply unit 340 supplies apparent power according to this adjustment necessity index to the power receiving point 30P of the air conditioning device 30 (S604). In this case, the apparent power supplied from the supply unit 340 is supplied to the target electric wire via the power receiving point 30P of the air conditioning device 30, thereby adjusting the apparent power of the target electric wire. Furthermore, as the apparent power of the target electric wire is adjusted, the voltage input to the air conditioning device 30 is adjusted. The adjustment necessity index can also be regarded as power information related to the apparent power that should be output by the air conditioning device 30. The acquisition unit 331 can also be regarded as power information acquisition means that acquires power information.

[0147] Furthermore, if the instruction acquired by the acquisition unit 331 is an internal instruction (NO in S601), the mode determination unit 334 determines the mode for controlling the operation of the AF 33 to be the internal mode (S605). The mode determination unit 334 determines whether the mode for controlling the operation of the AF 33 has switched from the external mode to the internal mode in the current mode control process (S606). The mode determination unit 334 determines whether the mode has switched from the external mode to the internal mode depending on whether the mode was the external mode until the current mode control process was performed. In other words, the mode determination unit 334 determines whether the mode has switched from the external mode to the internal mode in the current mode control process depending on whether the mode was determined to be the external mode in the previous mode control process.

[0148] If the internal mode was determined in the previous mode control process, in other words, if the current mode control process has not switched from the external mode to the internal mode (NO in S606), the mode control process ends. In this case, when the air conditioning sensor information is newly acquired by the acquisition unit 331, the adjustment process (FIGS. 7 and 8) is executed. Also, if the current mode control process has switched from the external mode to the internal mode (YES in S606), the process proceeds to the next step. In this case, the supply amount determination unit 339 determines the reactive power index based on the adjustment necessity index last used as the instruction value for the supply of apparent power when the target device was in the external mode in the next adjustment process (S607). Note that the adjustment necessity index last used as the instruction value for the supply of apparent power when the target device was in the external mode may be referred to as the last index below. The last index may also be regarded as the adjustment necessity index included in the external instruction most recently transmitted to the target device.

[0149] When the mode for controlling the operation of AF33 is determined to be the internal mode, as described in the first embodiment, the air conditioning device 30 determines a reactive power index based on air conditioning sensor information, and supplies fundamental wave reactive power according to the determined reactive power index to the power receiving point 30P. Even in this case, the voltage input to the air conditioning device 30 is adjusted. Furthermore, the fundamental wave reactive power supplied from the air conditioning device 30 is supplied to the electric wire via the power receiving point 30P, thereby adjusting the apparent power of the electric wire.

[0150] FIG. 14 is a diagram showing an example of a method in which the supply amount determination unit 339 determines a reactive power index for the target device. Next, an example of a method in which the supply amount determination unit 339 determines the reactive power index for the target device, which has been described in step 607 of the mode control process (see FIG. 13), will be described. In FIG. 14, a Volt-Var curve L is shown. In the following, it is assumed that the latest input voltage is identified as Vn in the adjustment process, and the last indicator is identified as Qr.

[0151] When the latest input voltage is the input voltage Vn, the supply amount determination unit 339 determines, from the relationship between this input voltage Vn and the Volt-Var curve L, the index corresponding to the input voltage Vn as the index Qn. In this example, the supply amount determination unit 339 determines the average value of the index Qn corresponding to the latest input voltage Vn and the last index Qr as the reactive power index. In the illustrated example, the reactive power index Qt is determined as the average value of the index Qn and the last index Qr. In addition, when the units of the final index and the reference index are different, the value of the final index converted into the same unit as the reference index may be used as the index Qr.

[0152] As described above, in this embodiment, the AF 33 further has an external mode in which fundamental wave reactive power is supplied from the supply unit 340 to the power receiving point 30P of the air conditioning device 30 based on the adjustment necessity index. 。 child In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode depending on the situation.

[0153] Furthermore, in this embodiment, the mode control unit 503, index calculation unit 504, and instruction unit 505 of the control server 50 have an internal mode in which fundamental reactive power is supplied from the air conditioning apparatus 30 to the power receiving point 30P in accordance with the magnitude of the input voltage input to the air conditioning apparatus 30, and an external mode in which fundamental reactive power is supplied from the air conditioning apparatus 30 to the power receiving point 30P based on the power line information. The mode control unit 503, index calculation unit 504, and instruction unit 505 of the control server 50 can be regarded as control means. Here, the external mode in which fundamental reactive power is supplied from the air conditioner 30 to the power receiving point 30P based on the power line information is regarded as a third supply mode. In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode depending on the situation.

[0154] In addition, in this embodiment, the AF 33 determines whether the mode for controlling the operation of the AF 33 is the internal mode or the external mode depending on whether the information condition is satisfied. In other words, the AF 33 performs control in the internal mode or the external mode based on the condition set for the adjustment necessity index. In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode, whichever mode is appropriate for the situation regarding the adjustment necessity index. Here, among the external modes, the mode according to the situation regarding the adjustment necessity index is regarded as a fourth supply mode.

[0155] In particular, in this embodiment, the information condition is defined for the acquisition of an adjustment necessity index by the acquisition unit 331 of the air conditioning apparatus 30. In this case, the voltage input to the air conditioning device 30 can be adjusted in either the internal mode or the external mode, whichever mode corresponds to the state in which the adjustment necessity index is acquired by the acquisition unit 331.

[0156] Furthermore, in this embodiment, when switching from the external mode to the internal mode, the AF 33 causes the supply unit 340 to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30 based on the adjustment necessity index. Here, the adjustment necessity index is information created in the control server 50 in the external mode. Therefore, the adjustment necessity index can also be regarded as mode information related to the external mode. In this case, the supply of fundamental reactive power by the supplying unit 340 in the external mode can be associated with the supply of fundamental reactive power by the supplying unit 340 in the internal mode.

[0157] In particular, in this embodiment, when switching from the external mode to the internal mode, the AF 33 determines the reactive power index according to the relationship between the final index and the reference index. In other words, when switching from the external mode to the internal mode, the AF 33 determines the reactive power index according to the relationship between the final index and the index related to the supply in the internal mode that is determined according to the magnitude of the input voltage. In this case, the supply of fundamental reactive power by the supplying unit 340 in the external mode and the supply of fundamental reactive power by the supplying unit 340 in the internal mode can be associated with each other according to the relationship between the final index and the reference index.

[0158] FIG. 15 is a diagram showing another example of a method in which the supply amount determination unit 339 determines a reactive power index for the target device. Next, regarding the method in which the supply amount determination unit 339 determines the reactive power index for the target device, which has been described in step 607 of the mode control process (see FIG. 13), another example different from the method shown in FIG. 14 will be described.

[0159] In this example, the supply amount determination unit 339 corrects the Volt-Var curve L based on the final index. In the following description, it is assumed that the latest input voltage is specified as Vn in the adjustment process, and the final indicator is the final indicator Qr. The slope of the portion of the Volt-Var curve L from the unnecessary lower limit Vd to the maximum value Ve before the Volt-Var curve L is corrected is referred to as the slope Lr.

[0160] In this example, the input voltage identifying unit 338 identifies the input voltage when the target device supplies apparent power according to the final index Qr. More specifically, the input voltage identifying unit 338 identifies the input voltage from the air conditioning sensor information about the target device acquired by the acquiring unit 331 when the target device supplies apparent power according to the final index Qr. In the illustrated example, this input voltage is identified as an input voltage Vr that is smaller than the unnecessary lower limit Vd and larger than the leading maximum value Ve. Furthermore, when the input voltage Vr is identified, a coordinate P is determined in FIG. 15, in which the horizontal axis is the input voltage Vr and the vertical axis is the final index Qr.

[0161] Next, the supply amount determination unit 339 corrects the slope Lr from the unnecessary lower limit Vd to the maximum value Ve, which is the slope of the range in which the input voltage Vr is located on the Volt-Var curve L. More specifically, the supply amount determination unit 339 corrects the slope Lr to a slope Lt, which is the slope of a line connecting the coordinates in which the unnecessary lower limit Vd is located on the Volt-Var curve L and the coordinate P. Then, the supply amount determination unit 339 determines the reactive power index Qt from the relationship between the corrected Volt-Var curve L and the input voltage Vn.

[0162] The method by which the supply amount determination unit 339 corrects the Volt-Var curve L is not limited to the example shown in FIG. The supply amount determination unit 339 may correct the Volt-Var curve L so as to move the Volt-Var curve L to the right in FIG. 15 until the Volt-Var curve L before correction in FIG. 15 reaches the coordinate P. The supply amount determination unit 339 may also correct the Volt-Var curve L so as to move the Volt-Var curve L to the lower side in FIG. 15 until the Volt-Var curve L before correction in FIG. 15 reaches the coordinate P. In this manner, the supply amount determination unit 339 may correct the entire Volt-Var curve L. In other words, when correcting the Volt-Var curve L, the supply amount determination unit 339 may not change the slope of the Volt-Var curve L.

[0163] In addition, in the present disclosure, when switching from the external mode to the internal mode, the supply amount determination unit 339 determines the reactive power index according to the relationship between the last index and the reference index, but is not limited to this. When switching from the external mode to the internal mode, the supply amount determination unit 339 may determine the reactive power index according to the relationship between the fundamental reactive power supplied by the supply unit 340 according to the last index and the reference index. In other words, when switching from the external mode to the internal mode, the information used to determine the reactive power index by the supply amount determination unit 339 may be the value of the fundamental reactive power supplied from the supply unit 340 according to the last index, rather than the last index. In this case, the value of the fundamental reactive power supplied from the supply unit 340 according to the last index is also taken as mode information related to the external mode.

[0164] Further, in the present disclosure, it has been described that the mode for controlling the operation of the AF 33 is determined to be the internal mode or the external mode for each air conditioning device 30, but this is not limited to this. When the target device is determined to be in internal mode or external mode in the mode control process, the control server 50 may send instructions to all air conditioning devices 30 provided in the voltage regulating system 1, so that all of these air conditioning devices 30 are controlled to the same mode as the target device.

[0165] Also, in the present disclosure, when the mode control process is switched from the external mode to the internal mode, the supply amount determination unit 339 determines the reactive power index based on the adjustment necessity index. Here, the adjustment necessity index used in determining the reactive power index may be an adjustment necessity index that targets the target electric wire and is the adjustment necessity index last used by the target device as the instruction value for the supply of apparent power. Also, the adjustment necessity index used in determining the reactive power index may be an adjustment necessity index that targets the target electric wire and is the adjustment necessity index last used by the target device as the instruction value for the supply of apparent power, regardless of whether it is an adjustment necessity index that targets the target electric wire and is the adjustment necessity index.

[0166] Also, in the present disclosure, it has been described that the acquisition unit 331 acquires both pieces of power information, but this is not limited to this. The power information may be acquired by a functional unit of the air conditioning device 30 that is different from the functional unit that acquires the voltage information and the position information. In other words, the voltage information acquisition means, the position information acquisition means, and the power information acquisition means may be the same functional unit in the air conditioning device 30, or may be different functional units.

[0167] Furthermore, the information conditions described in this disclosure are not limited to the examples given above. The information condition may be that the latest adjustment necessity index calculated by the control server 50 has been acquired by the acquisition unit 331 of the air conditioning apparatus 30. If an abnormality occurs in the network connecting the control server 50 and the air conditioning apparatus 30, the adjustment necessity index transmitted from the control server 50 may not be acquired by the acquisition unit 331 of the air conditioning apparatus 30. Then, if the acquisition unit 331 has not acquired the latest adjustment necessity index at the time when the adjustment necessity index would normally be received by the air conditioning apparatus 30, the mode control unit 503 of the control server 50 may determine that the information condition is not satisfied.

[0168] The information condition may also be that the supply unit 340 is able to supply fundamental reactive power based on the latest adjustment necessity indicator. Even if an abnormality occurs in the network connecting the control server 50 and the air conditioning apparatus 30, some of the adjustment necessity indicators transmitted from the control server 50 may be received by the air conditioning apparatus 30. On the other hand, in this case, the content of the adjustment necessity indicators received by the air conditioning apparatus 30 may not be normal because not all of the adjustment necessity indicators are received by the air conditioning apparatus 30. Then, if the content of the adjustment necessity indicator is abnormal and therefore it is not possible for the supply unit 340 to supply fundamental reactive power based on the adjustment necessity indicator, the mode control unit 503 may determine that the information condition is not satisfied. If the air conditioning device 30 is unable to receive a normal adjustment necessity indicator, the mode determination unit 334 may determine the mode for controlling the operation of the AF 33 to be the internal mode, regardless of instructions from the control server 50.

[0169] Further, in the present disclosure, an example in which the control server 50 is provided outside the power consuming facility 20 is illustrated (see FIG. 9), but the present invention is not limited to this. The control server 50 may be provided inside the power consuming facility 20. Also, the control server 50 may be provided inside each of the power consuming facilities 20 provided in the voltage regulating system 1.

[0170] In addition, in the present disclosure, it has been described that the control server 50 may be realized by distributed processing by a plurality of computers. As an example of the control server 50 being realized by distributed processing by a plurality of computers, a first control server and a second control server may be provided in the voltage adjustment system 1 instead of the control server 50. The first control server and the second control server are examples of a plurality of computers that realize the control server 50. Furthermore, the first control server is provided outside the power consumption facility 20, and the second control server is provided inside the power consumption facility 20. The first control server performs air conditioning control processing (see FIG. 12) based on the electric wire information acquired from the electric wire sensor 10S, and transmits an external instruction or an internal instruction to the second control server. Furthermore, the second control server may transmit the external instruction or the internal instruction received from the first control server to the air conditioning device 30, thereby causing the supply unit 340 of the air conditioning device 30 to supply fundamental reactive power to the power receiving point 30P. Furthermore, if the adjustment necessity index included in the external instruction transmitted from the first control server is not normally received by the second control server due to an abnormality or the like in the network connecting the first control server and the second control server, the second control server may transmit an internal instruction to the air conditioning device 30 regardless of the instruction from the first control server. In other words, the second control server may determine whether or not an information condition is satisfied, and transmit an external instruction or internal instruction to the air conditioning device 30 based on the result of the determination. In this case, the information condition used by the second control server for the determination may be any of the conditions described above.

[0171] In addition, in the present disclosure, the target electric line is any one of the supply side distribution line 14, the receiving side substation 16, and the consumer side distribution line 19, but is not limited thereto. The target electric line may be the transmission line 12.

[0172] Also, in the present disclosure, it has been described that the air conditioning apparatus 30 may, in the internal mode, specify an input voltage based on facility sensor information acquired from the facility sensor 20S, determine a reactive power index from the specified input voltage, and supply fundamental reactive power according to the determined reactive power index. Here, the network of the air conditioning apparatus 30 and the facility sensor 20S and the network of the control server 50 and each electric wire sensor 10S may be connected by different methods. As an example, the control server 50 and each electric wire sensor 10S may be connected wirelessly, while the air conditioning apparatus 30 and the facility sensor 20S may be connected by wire. In this case, even if an abnormality occurs in the connection between the control server 50 and each electric wire sensor 10S, the air conditioning apparatus 30 can realize the supply of fundamental reactive power according to the input voltage based on the facility sensor information acquired from the facility sensor 20S in the internal mode. In other words, compared to a configuration in which the method of connecting the network of the air conditioning device 30 and the facility sensor 20S to the network of the control server 50 and each power line sensor 10S is the same, it is possible to prevent the situation where adjustment of the voltage input to the air conditioning device 30 cannot be achieved in either external mode or internal mode.

[0173] The network of the air conditioning apparatus 30 and the facility sensor 20S may be connected using different methods from the network of the control server 50 and the air conditioning apparatus 30. The network of the air conditioning apparatus 30 and the facility sensor 20S may be connected using different methods from the network of the control server 50 and the electric wire sensors 10S and the network of the control server 50 and the air conditioning apparatus 30. The connection method of the first control server and the second control server described above may be connected using different methods from the second control server and the air conditioning apparatus 30.

[0174] Also, in the present disclosure, it has been described that the supply means of the air conditioning device 30 supplies apparent power to the power receiving point 30P of the air conditioning device 30. Here, the supply means supplying apparent power includes the supply means supplying each of the parameters described above regarding the apparent power.

[0175] Also, in the present disclosure, it has been described that the supply means of the air conditioner 30 supplies fundamental wave reactive power to the power receiving point 30P of the air conditioner 30. Here, when the supplying means supplies fundamental wave reactive power to the power receiving point 30P, a reactive current constituting this fundamental wave reactive power is supplied to the power receiving point 30P. Therefore, the supplying of fundamental wave reactive power by the supplying means includes the supplying of reactive current by the supplying means.

[0176] Also, in the present disclosure, it has been described that the control means of the air conditioning device 30 causes the supply means to supply fundamental wave reactive power to the power receiving point 30P of the air conditioning device 30. Examples of the specific parameters include power, reactive current, and voltage. Here, the control means of the air conditioning device 30 instructs the supply means to supply specific parameters related to apparent power, thereby realizing the supply of fundamental reactive power from the supply unit 340. Examples of the specific parameters include fundamental reactive power and reactive current. Therefore, when the control means causes the supply means to supply fundamental reactive power, this includes the control means instructing the supply means to supply fundamental reactive power and the control means instructing the supply means to supply reactive current. Also, when the control server 50 causes the supply means to supply fundamental reactive power, this includes the control server 50 instructing the supply means to supply fundamental reactive power and the control server 50 instructing the supply means to supply reactive current. Furthermore, the control means of the air conditioning device 30 controls specific parameters in the supply means, thereby realizing the supply of fundamental reactive power from the supply means. Examples of the specific parameters include fundamental reactive power, reactive current, and voltage. Therefore, the control means controlling the supply of fundamental reactive power by the supply means includes the control means controlling the fundamental reactive power of the supply means, the control means controlling the reactive current of the supply means, and the control means controlling the voltage of the supply means. Furthermore, the control server 50 controlling the supply of fundamental reactive power by the supply means includes the control server 50 controlling the fundamental reactive power of the supply means, the control server 50 controlling the reactive current of the supply means, and the control server 50 controlling the voltage of the supply means.

[0177] Furthermore, in the present disclosure, the control server 50 is configured to control the operation of the air conditioning device 30, but the present invention is not limited to this. For example, the air conditioning apparatus 30 may have the functions of the control server 50. In other words, the air conditioning apparatus 30 may be provided with a CPU 51 (see FIG. 10), a ROM 52, a RAM 53, a communication device 54, and a storage device 55 for implementing various functions. The air conditioning apparatus 30 may also have functions such as an information acquisition unit 501, a storage unit 502, a mode control unit 503, an index calculation unit 504, and an instruction unit 505. Then, when the air conditioning apparatus 30 acquires electric wire information from the electric wire sensor 10S in the external mode, it may determine an adjustment necessity index based on the acquired electric wire information, and supply fundamental wave reactive power to the power receiving point 30P according to the determined adjustment necessity index.

[0178] Here, each of the embodiments described above can be understood as follows. The control means of the present disclosure has an internal mode in which fundamental reactive power is supplied to the input voltage receiving point 30P in the air conditioner 30 according to the magnitude of the input voltage identified from the air conditioning sensor information acquired by the acquisition unit 331. In this case, even if the magnitude of the voltage input to the air conditioning device 30 fluctuates, the voltage input to the air conditioning device 30 is adjusted. Therefore, compared to a configuration in which the air conditioning device 30 does not operate according to the magnitude of the input voltage, it is possible to prevent a voltage that deviates from the range of equal to or more than the maximum lead voltage Ve and equal to or less than the maximum lag voltage Vc from being input to the air conditioning device 30.

[0179] Furthermore, in the internal mode, the control means performs a first control in which the supply unit 340 suppresses harmonic currents generated by the air conditioning device 30, or a second control in which the first control is performed and the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage. An example of the first control is control performed when the adjustment decision unit 335 decides not to adjust the voltage input to the air conditioning device 30. An example of the second control is control performed when the adjustment decision unit 335 decides to adjust the voltage input to the air conditioning device 30. In this case, even if it is necessary to suppress the flow of harmonic current from the air conditioning device 30 but there is no need to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30, it is possible to prevent fundamental reactive power from being supplied to the power receiving point 30P.

[0180] In addition, in the internal mode, the control means performs the first control when the magnitude of the input voltage does not satisfy a predetermined condition, and performs the second control when the magnitude of the input voltage satisfies the condition. The predetermined condition may be an adjustment condition. In this case, when the supply unit 340 is caused to suppress the outflow of harmonic current from the air conditioning device 30, it is possible to switch whether or not to cause the supply unit 340 to supply fundamental reactive power to the power receiving point 30P of the air conditioning device 30 depending on the magnitude of the input voltage.

[0181] In addition, in the internal mode, the mode determination unit 334 has a first mode in which the supply unit 340 supplies fundamental wave reactive power according to the magnitude of the input voltage when the magnitude of the input voltage satisfies a predetermined condition, and a second mode in which the supply unit 340 does not supply fundamental wave reactive power according to the magnitude of the input voltage even when the magnitude of the input voltage satisfies the condition. An example of the predetermined condition is an adjustment condition. An example of the first mode is a voltage adjustment mode. An example of the second mode is a voltage non-adjustment mode. In this case, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 always supplies fundamental reactive power according to the magnitude of the input voltage when the magnitude of the input voltage satisfies the adjustment condition.

[0182] Furthermore, in the internal mode, the mode determination unit 334 switches between the first mode and the second mode depending on the time. In this case, it is possible to suppress the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the time.

[0183] Furthermore, in the internal mode, the mode determination unit 334 switches between the first mode and the second mode depending on the relationship between the operation of the supply unit 340 and the time. In this case, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the operation time of the supply unit 340.

[0184] Furthermore, in the internal mode, the mode determination unit 334 switches between the first mode and the second mode depending on the position information acquired by the acquisition unit 331. In this case, compared to a configuration in which the supply unit 340 supplies fundamental reactive power according to the magnitude of the input voltage regardless of the position relative to the air conditioning device 30, it is possible to prevent the supply unit 340 from being used to supply fundamental reactive power.

[0185] Furthermore, in the internal mode, the control means controls the supply of fundamental reactive power by the supply unit 340 based on the suppression of harmonics by the supply unit 340. In this case, compared to a configuration in which the supply of fundamental reactive power by supply unit 340 is controlled regardless of the suppression of harmonic currents by supply unit 340, the impact of supplying fundamental reactive power by supply unit 340 on the suppression of harmonic currents by supply unit 340 can be reduced.

[0186] In addition, in the internal mode, the supply amount determination unit 339 determines an index related to the fundamental reactive power to be supplied by the supply unit 340 depending on the remaining capacity of the supply unit 340 for supplying fundamental reactive power when the supply unit 340 suppresses harmonic currents. In this case, the voltage input to the air conditioner 30 can be adjusted while ensuring the capacity of the supply unit 340 required to suppress harmonic currents.

[0187] In addition, in the internal mode, the control means performs a first control that causes the supply unit 340 to suppress harmonics generated by the air conditioning device 30, and a third control that causes the supply unit 340 to supply fundamental reactive power according to the magnitude of the input voltage, and prioritizes the first control over the third control when a first condition set for the magnitude of the input voltage is satisfied but a second condition set for the magnitude of the input voltage is not satisfied, and prioritizes the third control over the first control when the second condition is satisfied. An example of the first condition is an adjustment condition. An example of the second condition is a priority condition. In this case, it is possible to switch between prioritizing control that causes the supply unit 340 to suppress the harmonic current generated by the air conditioning device 30, and control that causes the supply unit 340 to supply fundamental reactive power depending on the magnitude of the input voltage, depending on the magnitude of the input voltage.

[0188] Furthermore, in the internal mode, the supply amount determination unit 339 determines an index related to the fundamental reactive power to be supplied by the supply unit 340, depending on the time related to the supply of the fundamental reactive power by the supply unit 340. In this case, the voltage input to the air conditioner 30 can be adjusted depending on the degree of adjustment according to the timing of the supply of fundamental reactive power by the supply unit 340.

[0189] Furthermore, in the internal mode, the supply amount determination unit 339 determines an index related to the fundamental reactive power to be supplied by the supply unit 340 in accordance with the position information acquired by the acquisition unit 331 . In this case, the voltage input to the air conditioner 30 can be adjusted depending on the degree of adjustment according to the position relative to the air conditioner 30.

[0190] Furthermore, in the internal mode, when the input voltage identified from the voltage information is equal to or lower than a predetermined value, the suppression unit 341 suppresses the consumption of active power by the air conditioning device 30. An example of the predetermined value is the maximum lead value Ve. In this case, compared to a configuration in which the air conditioning device 30 adjusts the voltage input to the air conditioning device 30 by only supplying fundamental wave reactive power, it is possible to prevent a voltage less than the maximum lead value Ve from being input to the air conditioning device 30.

[0191] Moreover, the voltage information is information created from the results of detection of the voltage in the air conditioner 30 by the air conditioning sensor 30S. In this case, it is possible to realize the supply of fundamental reactive power by the air conditioning device 30 according to the magnitude of the input voltage without using a detection means separate from the air conditioning device 30 to detect the voltage in the air conditioning device 30.

[0192] The supply means is an AF 33 that suppresses harmonic currents generated by the operation of the power conversion device 32. In this case, even when the adjustment unit 31 and the power conversion device 32 are not operating, it is possible to realize the supply of fundamental reactive power to the power receiving point 30P of the air conditioner 30.

[0193] Moreover, the fundamental reactive power supplied by the supply unit 340 is determined in advance according to the magnitude of the input voltage. In this case, if the voltage input to the air conditioning device 30 is not adjusted even when the supply unit 340 supplies fundamental wave reactive power, it is possible to prevent the supply unit 340 from approaching its operating limit, compared to a configuration in which the amount of fundamental wave reactive power supplied by the supply unit 340 is increased.

[0194] In addition, the AF 33 further has an external mode in which fundamental wave reactive power is supplied from the supply unit 340 to the power receiving point 30P based on the adjustment necessity index. In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode depending on the situation.

[0195] Further, the AF 33 performs control in the internal mode or the external mode based on the conditions set for the adjustment necessity index. In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode, whichever mode is appropriate for the situation regarding the adjustment necessity index.

[0196] Moreover, the conditions defined for the adjustment necessity index are defined for the acquisition of the adjustment necessity index by the acquisition unit 331. In this case, the voltage input to the air conditioning device 30 can be adjusted in either the internal mode or the external mode, whichever mode corresponds to the state in which the adjustment necessity index is acquired by the acquisition unit 331.

[0197] In addition, the AF 33 determines the reactive power index based on the adjustment need index when switching from the external mode to the internal mode. In this case, the supply of the fundamental reactive power by the supply unit 340 in the external mode can be associated with the supply of the fundamental reactive power by the supply unit 340 in the internal mode.

[0198] Furthermore, when switching from the external mode to the internal mode, the AF 33 determines the reactive power index according to the relationship between the adjustment necessity index and the reference index. In this case, the supply of the fundamental reactive power by the supply unit 340 in the external mode and the supply of the fundamental reactive power by the supply unit 340 in the internal mode can be associated according to the relationship between the adjustment necessity index and the reference index.

[0199] Also, from another perspective, the mode control unit 503, index calculation unit 504, and instruction unit 505 of the control server 50 of the present disclosure have an internal mode in which fundamental wave reactive power is supplied from the air conditioning unit 30 to the receiving point 30P of the input voltage at the air conditioning unit 30 in accordance with the magnitude of the input voltage input to the air conditioning unit 30, and an external mode in which fundamental wave reactive power is supplied from the air conditioning unit 30 to the receiving point 30P based on the power line information. In this case, the voltage input to the air conditioner 30 can be adjusted in either the internal mode or the external mode depending on the situation.

[0200] In addition, the configurations described above are not limited to the above embodiments, and can be modified without departing from the spirit of the invention. In other words, it is understood that various modifications of the form and details are possible without departing from the spirit and scope of the claims. The present invention is not limited to the above-described configurations, and some of the configurations described above may be omitted, or other functions may be added to the configurations described above. [Explanation of symbols]

[0201] 1... voltage regulation system, 10... power plant, 20... power consumption facility, 20S... facility sensor, 30... air conditioner, 30S... air conditioning sensor, 31... regulation unit, 32... power conversion device, 33... AF

Claims

1. a voltage information acquiring means for acquiring voltage information relating to an input voltage input to the device; A supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the device itself; A control means for controlling the supply means; Equipped with The control means supplies fundamental reactive power from the supply means to the power receiving point in accordance with a magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means, An air conditioner that changes the fundamental reactive power or the reactive current according to the result of supplying the fundamental reactive power.

2. A voltage information acquisition means for acquiring voltage information relating to an input voltage input to the device itself; A reactive power identification means for identifying reactive power at a receiving point of a power consuming facility; A supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the device itself; A control means for controlling the supply means; Equipped with The control means supplies fundamental wave reactive power from the supply means to the power receiving point in accordance with a magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means; and a second supply mode in which a reactive current is supplied from the supply means to a power receiving point of the power consuming facility in response to the reactive power identified by the reactive power identifying means, An air conditioning apparatus that changes the fundamental wave reactive power or the reactive current according to the result of supplying the reactive current.

3. A voltage information acquisition means for acquiring voltage information regarding an input voltage input to the device itself; An electric wire information acquiring means for acquiring electric wire information related to apparent power; A supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the device itself; A control means for controlling the supply means; Equipped with The control means supplies fundamental wave reactive power from the supply means to the power receiving point in accordance with a magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means; and a third supply mode in which fundamental wave reactive power is supplied from the supply means to the power receiving point based on the power line information, An air conditioner that changes the fundamental reactive power or the reactive current according to the result of supplying the fundamental reactive power.

4. A voltage information acquisition means for acquiring voltage information regarding an input voltage input to the device itself; A power information acquisition means for acquiring power information related to apparent power to be output by the device itself; A supply means for supplying fundamental wave reactive power to a receiving point of the input voltage in the device itself; A control means for controlling the supply means; Equipped with The control means supplies fundamental wave reactive power from the supply means to the power receiving point in accordance with a magnitude of the input voltage specified from the voltage information acquired by the voltage information acquisition means; and a fourth supply mode in which fundamental wave reactive power is supplied from the supply means to the power receiving point based on the power information, An air conditioner that changes the fundamental reactive power or the reactive current according to the result of supplying the fundamental reactive power.

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