Control device, control method, control program, and uninterruptible power supply system

Abstract

To perform demand response using an existing uninterruptible power supplies.SOLUTION: A control device of an embodiment is a control device that receives power from a commercial power source, is connected to a storage battery that can charge the power input from the commercial power source, and is capable of communicating with an uninterruptible power supply that can supply power to a load from the commercial power source or the storage battery. The control device includes an acquisition unit that acquires a demand response command that instructs execution of demand response, and an output unit that controls the amount of power input from the commercial power source to the uninterruptible power supply by outputting an instruction to the uninterruptible power supply to adjust the charge or discharge amount of the storage battery in accordance with the demand response command.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a control device, a control method, a control program, and an uninterruptible power supply system. [Background technology]

[0002] Traditionally, the balance between supply and demand for electricity has been adjusted using a demand response mechanism. For example, when demand is tight, large-scale facility managers implement demand response measures (downward DR) such as power saving and operating private generators. On the other hand, when the amount of power generated by renewable energy sources exceeds demand due to weather or other factors, demand response measures (upward DR) are implemented to increase demand. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-148679 Summary of the Invention [Problem to be solved by the invention]

[0004] Whether or not the initial installation costs of equipment to respond to demand response requests are profitable when compared with the rewards obtained through demand response depends on factors such as the balance between the current state of affairs, electricity rates, the amount of renewable energy generated, which is affected by weather fluctuations, and electricity usage, which is also easily affected by weather fluctuations. This makes it difficult to determine whether or not to install the equipment. To further popularize demand response, it would be desirable to be able to apply existing systems to demand response.

[0005] An object of the present invention is to provide a control device, a control method, a control program, and an uninterruptible power supply system that are capable of executing demand response using an existing uninterruptible power supply device. [Means for solving the problem]

[0006] According to an embodiment, a control device is a control device that receives power from a commercial power source, is connected to a storage battery that can charge the power input from the commercial power source, and is capable of communicating with an uninterruptible power supply that can supply power to a load from the commercial power source or the storage battery. The control device includes an acquisition unit and an output unit. The acquisition unit acquires a demand response command that instructs the uninterruptible power supply to execute a demand response. The output unit controls the amount of power input from the commercial power source to the uninterruptible power supply by outputting an instruction to the uninterruptible power supply to adjust the charge or discharge amount of the storage battery in accordance with the demand response command. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a block diagram showing an example of the overall configuration of the power supply and demand system according to the first embodiment. [Figure 2] FIG. 2 is a block diagram illustrating an example of a functional configuration of the control device according to the first embodiment. [Figure 3] FIG. 3 is a sequence diagram showing an example of a processing flow in the uninterruptible power supply system of the first embodiment. [Figure 4] FIG. 4 is a block diagram showing an example of the overall configuration of the power supply and demand system according to the second embodiment. [Figure 5] FIG. 5 is a block diagram illustrating an example of a functional configuration of a control device according to the second embodiment. [Figure 6] FIG. 6 is a flowchart showing an example of a processing flow in the control device of the second embodiment. [Figure 7] FIG. 7 is a block diagram showing an example of the overall configuration of the power supply and demand system according to the third embodiment. [Figure 8] FIG. 8 is a sequence diagram showing an example of a processing flow in the uninterruptible power supply system of the third embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of an electricity supply and demand system according to the fourth embodiment. [Figure 10] FIG. 10 is a block diagram showing an example of the overall configuration of the power supply and demand system according to the fifth embodiment. [Figure 11] FIG. 11 is a flowchart showing an example of a processing flow in the control device of the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Embodiment 1] Hereinafter, the first embodiment will be described with reference to FIGS.

[0009] 1 is a block diagram showing the overall configuration of an electricity supply and demand system 1A according to embodiment 1. The electricity supply and demand system 1A according to embodiment 1 includes an uninterruptible power supply system 10A, a commercial power source 11, a power measurement device 12, a frequency measurement device 13A, and a load 14. The uninterruptible power supply system 10A, the power measurement device 12, the frequency measurement device 13A, and the load 14 are installed in a building B managed by an electricity facility manager.

[0010] The commercial power source 11 is a power supply source. The commercial power source 11 includes a power generation facility, a power transmission facility, and the like, and transmits AC power to the building B via the power transmission facility.

[0011] The power measuring device 12 and the frequency measuring device 13A are provided in a power receiving unit (not shown) of the building B. The power measuring device 12 measures the amount of AC power input from the commercial power source 11. The frequency measuring device 13A measures the frequency of the AC input from the commercial power source 11.

[0012] The load 14 is an electrical device that consumes power as required power. The load 14 can receive power from an uninterruptible power supply 200A and a storage battery 203A, which will be described later.

[0013] The uninterruptible power supply system 10A is provided between a commercial power supply 11 and a load 14, and includes a control device 100A and an uninterruptible power supply 200A.

[0014] The uninterruptible power supply 200A is a power supply that receives AC power input from the commercial power supply 11 and supplies the required power to the load 14. The uninterruptible power supply 200A includes a rectifier 201A that converts the AC power input from the commercial power supply 11 into DC power, and an inverter 202 that converts the DC power into AC power. The uninterruptible power supply 200A has a storage battery 203A connected between the rectifier 201A and the inverter 202. The storage battery 203A is a rechargeable lithium-ion battery or the like.

[0015] For example, under normal circumstances, the uninterruptible power supply 200A performs normal operation in which it supplies the required power from the commercial power supply 11 to the load 14 via the rectifier 201A and the inverter 202, and in the event of a power outage in the commercial power supply 11, it performs power outage operation in which it discharges the storage battery 203A and supplies the required power from the storage battery 203A to the load 14 via the inverter 202.

[0016] Rectifier 201A is configured to be able to control the charging and discharging of storage battery 203A by adjusting its conversion output. For example, lowering the DC voltage or output current as the conversion output of rectifier 201A promotes DC / AC conversion of power, and storage battery 203A is discharged. On the other hand, increasing the DC voltage or output current of rectifier 201A promotes AC / DC conversion of power, and storage battery 203A is charged.

[0017] When storage battery 203A discharges, the discharged power is supplied to load 14 via inverter 202. As a result, at least a portion of the power required by load 14 is compensated for by the power supplied from storage battery 203A, and the amount of power supplied from commercial power source 11 to load 14 decreases. In other words, the amount of input power input from commercial power source 11 to uninterruptible power supply 200A decreases. On the other hand, when storage battery 203A is charged, the power required by load 14 is compensated for by the power supplied from commercial power source 11, and the amount of input power from commercial power source 11 to uninterruptible power supply 200A increases by the amount of charge.

[0018] The rectifier 201A can adjust the conversion output as described above in response to an input power control command received from the control device 100A. The input power control command will be described in detail later.

[0019] The control device 100A is a computer capable of communicating with the uninterruptible power supply 200A. The control device 100A includes a CPU, a storage device, a communication I / F, and the like, all of which are not shown. The CPU is a processor that controls the overall operation of the control device 100A. The storage device is, for example, a ROM, and stores various data and programs required to realize various functions in the control device 100A. The communication I / F is an interface for communicating with external devices such as the uninterruptible power supply 200A.

[0020] The control device 100A is also configured to be able to communicate with a power supply control center A via a network. The power supply control center A is an organization that adjusts the supply and demand of electricity. The power supply control center A transmits a demand response command to the control device 100A, which is managed by a facility manager that submitted a bid for the demand response, to instruct the control device 100A to execute the demand response.

[0021] When bidding for demand response, the load dispatching center A presents to the facility manager bidding conditions, such as the response time from when the demand response command is sent until the demand response is executed, the duration for which the demand response continues, and the minimum bid energy amount. The bidding conditions are divided into categories called primary control capacity, tertiary control capacity, and so on, depending on the response time. In this embodiment, the bidding conditions presented are primary control capacity with a response time of 10 seconds or less. Furthermore, for primary control capacity, the duration is 5 minutes or more, and the minimum bid energy amount is 5 MW.

[0022] When the control device 100A receives a demand response command from the power supply control center A, it transmits an input power control command to the rectifier 201A to instruct the rectifier 201A to adjust the conversion output according to the amount of power to be adjusted. When the rectifier 201A adjusts the conversion output, it becomes possible to adjust the charge / discharge amount of the storage battery 203A, and it becomes possible to control the amount of input power input from the commercial power source 11 to the uninterruptible power supply 200A.

[0023] Next, the configuration of the control device 100A will be described in more detail.

[0024] Fig. 2 is a block diagram showing the functional configuration of the control device 100A of embodiment 1. As shown in Fig. 2, the control device 100A includes, as its functional configuration, a measurement unit 110, a bidding unit 111, an acquisition unit 112, a calculation unit 113, and an output unit 114.

[0025] The measurement unit 110 acquires the amount of AC power input from the commercial power supply 11 from the measurement results of the power measurement device 12. The measurement unit 110 also acquires the frequency of the AC input from the commercial power supply 11 from the measurement results of the frequency measurement device 13A.

[0026] The bidding unit 111 submits a bid for a demand response to the power dispatching center A. Specifically, the bidding unit 111 transmits bidding information including information regarding the execution time of the demand response once a week based on the bidding conditions presented by the power dispatching center A.

[0027] Prior to transmitting the bidding information, the bidding unit 111 calculates the amount of surplus power of the uninterruptible power supply 200A from the difference between the amount of power used by the uninterruptible power supply 200A and the rated power of the uninterruptible power supply 200A. The bidding unit 111 transmits the bidding information if the calculated amount of surplus power satisfies the minimum bid power amount of the bidding conditions presented by the power supply dispatch center A. After transmitting the bidding information, when the bidding unit 111 receives information from the power supply dispatch center A indicating that the bid has been accepted, the conclusion of the demand response contract is completed.

[0028] The acquisition unit 112 acquires a demand response command that instructs the execution of a demand response from the power supply control center A. The demand response command includes information regarding the execution time of the demand response specified in the bidding information. For example, the acquisition unit 112 acquires information such as "It is now 1:00 p.m. Please execute a demand response." as the demand response command. Note that the demand response command does not include information regarding the amount of power that should be adjusted for supply and demand.

[0029] The calculation unit 113 calculates the amount of power to be adjusted based on predetermined information that is not included in the demand response command. Specifically, the calculation unit 113 calculates the amount of power to be adjusted based on the frequency of the AC input from the commercial power source 11, which is acquired by the measurement unit 110. For example, if the frequency is lower than a reference value, the amount of power to be adjusted is a negative value corresponding to the amount of frequency decrease (a side that reduces demand). On the other hand, for example, if the frequency is higher than the reference value, the amount of power to be adjusted is a positive value corresponding to the amount of frequency increase (a side that increases demand).

[0030] When the acquisition unit 112 acquires a demand response command, the output unit 114 outputs an input power control command to the rectifier 201A to instruct the rectifier 201A to adjust the conversion output in accordance with the amount of power for which supply and demand adjustment is to be made. Specifically, the output unit 114 instructs the rectifier 201A to adjust the conversion output by transmitting the amount of power for which supply and demand adjustment is to be made, calculated by the calculation unit 113. In this way, by outputting the input power control command, the output unit 114 causes the rectifier 201A to adjust the charge / discharge amount of the storage battery 203A and control the amount of input power input from the commercial power source 11 to the uninterruptible power supply 200A.

[0031] Upon receiving the input power control command, rectifier 201A adjusts the conversion output in accordance with the amount of power to be adjusted, and adjusts the charge / discharge amount of storage battery 203A, thereby controlling the amount of input power input from commercial power source 11 to uninterruptible power supply 200A. Hereinafter, the control of the amount of input power performed based on the demand response command as described above may be referred to as a demand response operation.

[0032] Here, the time from when the demand response command is acquired by the acquisition unit 112 until the demand response operation is executed by the uninterruptible power supply 200A is within 10 seconds, which is the first predetermined time. This corresponds to the response time presented as a bidding condition by the power dispatch center A. Furthermore, the uninterruptible power supply 200A continues the demand response operation for at least 5 minutes, which is the second predetermined time. In other words, the uninterruptible power supply 200A continues the demand response operation for at least the time corresponding to the duration presented as a bidding condition by the power dispatch center A. Note that the values ​​of the response time, duration, and minimum bid energy presented as bidding conditions are merely examples and are not limited to these.

[0033] FIG. 3 is a sequence diagram showing the flow of processing in the uninterruptible power supply system 10A of the first embodiment.

[0034] As shown in FIG. 3, the bidding unit 111 submits a bid for a demand response to the power dispatching center A (step S11). Next, the acquisition unit 112 acquires a demand response command from the power dispatching center A (step S12). Upon acquiring the demand response command, the measurement unit 110 acquires the frequency of the AC input from the commercial power source 11 from the measurement results of the frequency measurement device 13A (step S13). The calculation unit 113 calculates the amount of power to be adjusted for supply and demand based on the frequency of the commercial power source 11 (step S14). Next, the output unit 114 outputs an input power control command based on the amount of power to be adjusted for supply and demand to the uninterruptible power supply 200A (step S15).

[0035] When the rectifier 201A of the uninterruptible power supply 200A receives the input power control command, the rectifier 201A charges or discharges the storage battery 203A by adjusting the conversion output (step S16). This starts the demand response operation. This completes the processing in the uninterruptible power supply system 10A.

[0036] [Summary] The control device 100A of the first embodiment includes an acquisition unit 112 that acquires a demand response command that instructs the execution of a demand response, and an output unit 114 that outputs an input power control command to the rectifier 201A that instructs the rectifier 201A to adjust the conversion output according to the amount of power to be adjusted for supply and demand. This adjusts the charge / discharge amount of the storage battery 203A, making it possible to control the amount of input power input from the commercial power source 11 to the uninterruptible power supply 200A. That is, the uninterruptible power supply 200A performs a demand response operation when it acquires a demand response command, in addition to normal operation and operation during a power outage. In this way, demand response can be realized using an existing uninterruptible power supply 200A.

[0037] Furthermore, in the past, information on the amount of power that needed to be adjusted for demand response was transmitted to the facility manager via power supply control center A. However, when transmitting via power supply control center A, it could take time to obtain the necessary information due to factors such as communication delays. In order to respond to power supply and demand adjustments that require a response on the order of seconds, it was desirable for the demand response operation to be carried out on the order of seconds after receiving a demand response command.

[0038] According to the control device 100A of the first embodiment, the amount of power to be adjusted for demand is calculated based on the frequency of the commercial power source 11 measured by the frequency measurement device 13A. In this way, the necessary information can be obtained offline without going through the load dispatch center A, so that the control device 100A can execute a demand response within 10 seconds, which corresponds to the response time presented as a bidding condition, after receiving a demand response command from the load dispatch center A.

[0039] [Embodiment 2] Hereinafter, the second embodiment will be described with reference to FIGS.

[0040] 4 is a block diagram showing the overall configuration of a power supply and demand system 1B of embodiment 2. The power supply and demand system 1B of embodiment 2 differs from the above-described embodiment 1 in that a control device 100B is provided in an uninterruptible power supply 200B. Note that, in the following, when a configuration and function similar to those of embodiment 1 are present, the same reference numerals are used and the description thereof may be omitted.

[0041] As shown in FIG. 4, the power supply and demand system 1B of the second embodiment includes a commercial power source 11, a power measurement device 12, an uninterruptible power supply 200B, and a load .

[0042] The uninterruptible power supply 200B includes a rectifier 201B that converts AC input from the commercial power supply 11 into DC, and an inverter 202 that converts DC into AC. The uninterruptible power supply 200B has a storage battery 203A connected between the rectifier 201B and the inverter 202. A frequency measurement device 13B is provided at an input section (not shown) of the uninterruptible power supply 200B.

[0043] The rectifier 201B includes a control device 100B. The control device 100B is a computer including a CPU, a storage device, and a communication I / F (not shown). The CPU is a processor that controls the overall operation of the rectifier 201B. The storage device is, for example, a ROM, and stores various data and programs required to realize various functions in the rectifier 201B. The communication I / F is an interface for communicating with external devices.

[0044] Fig. 5 is a block diagram showing the functional configuration of the control device 100B of embodiment 2. As shown in Fig. 5, the control device 100B includes, as its functional configuration, a measurement unit 110, a bidding unit 111, an acquisition unit 112, a calculation unit 113, and a control unit 115.

[0045] Control unit 115 controls the conversion output of rectifier 201B based on the amount of power to be adjusted for supply and demand calculated by calculation unit 113. This adjusts the charge / discharge amount of storage battery 203A, and controls the amount of power input from commercial power source 11 to uninterruptible power supply 200B.

[0046] FIG. 6 is a flowchart showing the flow of processing in the control device 100B of the second embodiment.

[0047] As shown in FIG. 6, the bidding unit 111 submits a bid for a demand response to the power dispatching center A (step S21). Next, the acquisition unit 112 acquires a demand response command from the power dispatching center A (step S22). Upon acquiring the demand response command, the measurement unit 110 acquires the frequency of the AC input from the commercial power source 11 from the measurement results of the frequency measurement device 13B (step S23). Next, the calculation unit 113 calculates the amount of power to be adjusted based on the frequency of the commercial power source 11 (step S24). Next, the control unit 115 controls the conversion output of the rectifier 201B based on the amount of power to be adjusted (step S25). This completes the processing in the control device 100B.

[0048] According to the power supply and demand system 1B of the second embodiment, it is possible to achieve the same effects as those of the first embodiment described above.

[0049] [Embodiment 3] Hereinafter, the third embodiment will be described with reference to FIGS.

[0050] 7 is a block diagram showing the overall configuration of an electricity supply and demand system 1C of embodiment 3. The electricity supply and demand system 1C of embodiment 3 differs from the above-described embodiment 1 in that it includes a battery monitoring device 204. Note that, in the following, when the system has the same configuration and function as those of the above-described embodiments, the same reference numerals are used and the description thereof may be omitted.

[0051] As shown in Fig. 7, the storage battery 203B includes a storage battery monitoring device 204. The storage battery monitoring device 204 is a computer including a CPU, a storage device, a communication I / F, etc. (not shown). The CPU controls the overall operation of the storage battery monitoring device 204. The storage device stores various data and programs required to realize various functions of the storage battery monitoring device 204.

[0052] The battery monitoring device 204 calculates the minimum amount of power that must be secured for the uninterruptible power supply 200A to supply the required power to the load 14 in the event of a power outage of the commercial power source 11, and sets this as the minimum required amount of power. Specifically, the battery monitoring device 204 calculates the amount of power based on the required power of the load 14, the time that the uninterruptible power supply 200A should supply power to the load 14, the operating state of the uninterruptible power supply 200A, the load factor, etc.

[0053] Battery monitoring device 204 constantly monitors the remaining energy of battery 203B and determines whether the remaining energy is equal to or less than the minimum required energy. If it is determined that the remaining energy of battery 203B is equal to or less than the minimum required energy during a demand response operation, battery monitoring device 204 outputs a discharge stop command to rectifier 201A to instruct it to stop discharging battery 203B.

[0054] Upon receiving the discharge stop command, the rectifier 201A ignores the input power control command received from the control device 100A and cancels the adjustment of the conversion output. Then, the rectifier 201A increases the conversion output to stop the discharge of the storage battery 203B. This starts normal operation in which the required power is supplied from the commercial power source 11 to the load 14, and the demand-response operation stops.

[0055] 8 is a sequence diagram showing the flow of processing in the uninterruptible power supply system 10A of embodiment 3. It is assumed that a demand-response operation has been executed prior to the processing of step S31.

[0056] The battery monitoring device 204 calculates the minimum amount of power that the battery 203B should have available and sets it as the minimum required amount of power (step S31). Next, the battery monitoring device 204 acquires the remaining amount of power in the battery 203B (step S32). Next, the battery monitoring device 204 determines whether the remaining amount of power in the battery 203B is equal to or less than the minimum battery amount of power (step S33).

[0057] When the remaining energy of the storage battery 203B becomes equal to or less than the minimum battery energy, the storage battery monitoring device 204 outputs a discharge stop command to the rectifier 201A (step S34). When the rectifier 201A of the uninterruptible power supply 200A receives the discharge stop command, it cancels the adjustment of the conversion output to stop discharging the storage battery 203B (step S35). This completes the processing in the uninterruptible power supply system 10A.

[0058] As described above, the battery monitoring device 204 of the third embodiment stops discharging the storage battery 203B when the remaining energy of the storage battery 203B falls below the minimum battery energy level. This prevents the storage battery 203B from discharging too much during demand response operation. This allows the uninterruptible power supply 200A to supply sufficient power to the load 14, even in the event of a power outage of the commercial power source 11, for example. The power supply and demand system 1C of the third embodiment can also achieve other effects similar to those of the first embodiment.

[0059] In the third embodiment, the battery monitoring device 204 sets the minimum required amount of power and outputs a command to stop discharging in accordance with the determination result of whether the remaining amount of power in the battery 203B is equal to or less than the minimum amount of power. However, this is not limiting. For example, the control device 100A may perform the above-described processing instead of the battery monitoring device 204.

[0060] [Embodiment 4] Hereinafter, the fourth embodiment will be described with reference to FIG.

[0061] 9 is a diagram illustrating an electric power supply and demand system 1D according to a fourth embodiment. The electric power supply and demand system 1D according to the fourth embodiment is a modification of the third embodiment, and differs from the third embodiment in that the rectifier 201A has a function of stopping the demand-response operation when the commercial power source 11 experiences a power outage. In the following description, when the system has the same configurations and functions as those of the above-described embodiments, the description thereof may be omitted.

[0062] 9, if a power outage occurs in commercial power supply 11 during demand response operation, rectifier 201A, which constantly monitors the input voltage from commercial power supply 11, detects a voltage abnormality and thereby detects the power outage in commercial power supply 11. When a power outage in commercial power supply 11 is detected, rectifier 201A stops operation.

[0063] The storage battery 203B starts discharging as a result of the operation of the rectifier 201A being stopped. In this way, the demand response operation is stopped, and the required power is supplied from the storage battery 203B to the load 14. In other words, operation during a power outage is started.

[0064] In this way, when the rectifier 201A detects a power outage of the commercial power supply 11, it stops its operation. As a result, the uninterruptible power supply 200A stops its demand-response operation and starts power outage operation. As a result, the uninterruptible power supply 200A can continue to supply the necessary power to the load 14 even during a power outage of the commercial power supply 11. The power supply and demand system 1D of the fourth embodiment can also achieve other effects similar to those of the first embodiment described above.

[0065] [Embodiment 5] Hereinafter, the fifth embodiment will be described with reference to FIGS.

[0066] 10 is a block diagram showing the overall configuration of an electric power supply and demand system 1E of embodiment 5. The electric power supply and demand system 1E of embodiment 5 is a modification of embodiment 3, and differs from embodiment 3 in that a plurality of uninterruptible power supplies are connected to a load 14. In the following, when the electric power supply and demand system 1E has the same configuration and functions as those of the above-described embodiments, the description thereof may be omitted.

[0067] 10, in a power supply and demand system 1E of the fifth embodiment, an uninterruptible power supply system 10B includes a control device 100C and a plurality of uninterruptible power supplies 200A-1 to 200A-n (n is an integer equal to or greater than 1) connected in parallel to a load 14. Each of the plurality of uninterruptible power supplies 200A-1 to 200A-n is connected to a respective one of storage batteries 203B-1 to 203B-n. Each of the storage batteries 203B-1 to 203B-n includes a storage battery monitoring device 204-1 to 204-n.

[0068] The control device 100C calculates the minimum amount of power that should be secured in order for the plurality of uninterruptible power supplies 200A-1 to 200A-n to supply the necessary power to the load 14 in the event of a power outage of the commercial power supply 11. The control device 100C also specifies the number of operating uninterruptible power supplies from the plurality of uninterruptible power supplies 200A-1 to 200A-n.

[0069] The control device 100C calculates the minimum amount of power that each uninterruptible power supply should have available, based on the number of operating uninterruptible power supplies and the calculated minimum amount of power that should be available. The control device 100C transmits the minimum amount of power that each uninterruptible power supply should have available to each of the multiple battery monitoring devices 204-1 to 204-n.

[0070] Each of the plurality of battery monitoring devices 204-1 to 204-n sets the received amount of power as the minimum required amount of power. Each of the plurality of battery monitoring devices 204-1 to 204-n constantly monitors the remaining amount of power in each of the plurality of batteries 203B-1 to 203B-n, and if the remaining amount of power is equal to or less than the minimum required amount of power, outputs a discharge stop command to each of the rectifiers 201A-1 to 201A-n.

[0071] FIG. 11 is a flowchart showing the flow of processing in the control device 100B of the fifth embodiment.

[0072] 11, the control device 100C calculates the minimum amount of power that should be secured by the plurality of uninterruptible power supplies 200A-1 to 200A-n (step S41). Next, the control device 100C identifies the number of operating uninterruptible power supplies (step S42). Based on the number of operating uninterruptible power supplies and the calculated amount of power, the control device 100C calculates the minimum amount of power that should be secured by each uninterruptible power supply (step S43).

[0073] The control device 100C transmits the minimum amount of power that each uninterruptible power supply should have available to each of the battery monitoring devices 204-1 to 204-n (step S44). Each of the battery monitoring devices 204-1 to 204-n sets the received amount of power as the minimum required amount of power. This completes the processing in the control device 100C.

[0074] As described above, the control device 100C of the fifth embodiment calculates the minimum amount of power that each uninterruptible power supply should have available, based on the number of operating uninterruptible power supplies, and transmits the calculation result to the battery monitoring device. As a result, even when multiple uninterruptible power supplies are connected in parallel to the load 14, each of the multiple battery monitoring devices can stop discharging its respective battery when the remaining power of the battery falls below the minimum battery power level. As a result, excessive discharging of each battery can be prevented during demand response operation. As a result, even in the event of a power outage or the like in the commercial power supply 11, a necessary and sufficient amount of power can be supplied to the load 14. The power supply and demand system 1E of the fifth embodiment can also achieve other effects similar to those of the first embodiment.

[0075] [Other embodiments] In the above-described embodiment and modified example, the control device receives a demand response command transmitted from the power supply control center A, but the source of the demand response command is not limited to the power supply control center A. For example, an aggregator related to demand response may transmit a demand response command to the control device.

[0076] In the above-described embodiment and modified example, the control device is described as automatically submitting a bid to the power supply control center A, but the bidding method is not limited to this. For example, the facility manager who manages the control device 100A may manually transmit bidding information to the power supply control center A and manually obtain information indicating a successful bid transmitted from the power supply control center A.

[0077] The control device of the embodiment has a processor such as a CPU, a storage device such as a ROM or RAM, an external storage device such as an HDD, SSD, or CD drive, a display device such as a display device, and input devices such as a keyboard and a mouse, and has a hardware configuration that uses a normal computer.

[0078] The control programs executed by the control devices of the above-described embodiments are provided in a state that they are pre-installed in a ROM or the like.

[0079] The control program executed by the control device of the above-described embodiment may be configured to be provided by being recorded in an installable or executable file format on a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, or a DVD (Digital Versatile Disk).

[0080] Furthermore, the control program executed by the control device of the above-described embodiment may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. Also, the control program executed by the control device of the above-described embodiment may be provided or distributed via a network such as the Internet.

[0081] The control program executed by the control device of the above-mentioned embodiment has a modular structure including each of the above-mentioned functional units, and in actual hardware, the CPU (processor) reads and executes the control program from the above-mentioned ROM, thereby loading each of the above-mentioned functional units (measurement unit 110, bidding unit 111, acquisition unit 112, calculation unit 113, output unit 114) onto the main memory device, and each functional unit is generated on the main memory device.

[0082] Although the embodiments of the present invention have been described above, they are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0083] 1A, 1B, 1C, 1D, 1E...power supply and demand system, 10A, 10B...uninterruptible power supply system, 11...commercial power supply, 12...power measuring device, 13A, 13B...frequency measuring device, 14...load, 100A, 100B, 100C...control device, 200A, 200B...uninterruptible power supply, 201A, 201B...rectifier, 202...inverter, 203A, 203B...storage battery, 204...storage battery monitoring device, A...power supply control center, B...building.

Claims

1. A control device that receives power from a commercial power source, is connected to a storage battery that can charge the power input from the commercial power source, and can communicate with an uninterruptible power supply that can supply power to a load from the commercial power source or the storage battery, an acquisition unit that acquires a demand response command that instructs execution of a demand response; an output unit that controls the amount of power input from the commercial power source to the uninterruptible power supply by outputting to the uninterruptible power supply an instruction to adjust the amount of charge or discharge of the storage battery in accordance with the demand response command; A control device comprising:

2. the power input from the commercial power supply to the uninterruptible power supply is AC, the uninterruptible power supply includes a rectifier that converts AC input from the commercial power supply into DC, the output unit outputs, to the rectifier, an input power control command that instructs the rectifier to adjust a conversion output according to an amount of power to be supplied and demand adjusted, as an instruction to adjust an amount of charge or discharge of the storage battery; a calculation unit that specifies the amount of power to be adjusted based on predetermined information that is not included in the demand response command, The control device according to claim 1 .

3. the predetermined information is the frequency of the AC input from the commercial power source, The control device according to claim 2 .

4. 1. A control device provided in an uninterruptible power supply that includes a rectifier that converts AC input from a commercial power source into DC, and an inverter that converts DC into AC, and a storage battery connected between the rectifier and the inverter, and that can supply required power from the commercial power source and the storage battery to a load, an acquisition unit that acquires a demand response command that instructs execution of a demand response; a control unit that controls the conversion output of the rectifier in accordance with the amount of power to be adjusted for supply and demand, thereby causing the rectifier to adjust the amount of charge and discharge of the storage battery and control the amount of AC input from the commercial power source to the uninterruptible power supply; A control device comprising:

5. A control method executed by a control device capable of communicating with an uninterruptible power supply that receives power from a commercial power source, is connected to a storage battery that can charge the power input from the commercial power source, and can supply power to a load from the commercial power source or the storage battery, an acquisition step of acquiring a demand response command instructing execution of a demand response; an output step of outputting an instruction to the uninterruptible power supply to adjust the charge amount or discharge amount of the storage battery in response to the demand response command, and controlling the amount of power input from the commercial power supply to the uninterruptible power supply; A control method comprising:

6. A control program to be executed by a computer of a control device capable of communicating with an uninterruptible power supply that receives power from a commercial power source, is connected to a storage battery that can charge the power input from the commercial power source, and can supply power to a load from the commercial power source or the storage battery, an acquisition step of acquiring a demand response command instructing execution of a demand response; an output step of outputting an instruction to the uninterruptible power supply to adjust the charge amount or discharge amount of the storage battery in response to the demand response command, and controlling the amount of power input from the commercial power supply to the uninterruptible power supply; A control program for causing the computer to execute the above.

7. An uninterruptible power supply system including a rectifier that converts AC input from a commercial power source into DC, an inverter that converts DC into AC, a storage battery connected between the rectifier and the inverter, and capable of supplying required power to a load from the commercial power source and the storage battery, and a control device that can communicate with the uninterruptible power supply, The control device an acquisition unit that acquires a demand response command that instructs execution of a demand response; an output unit that outputs an input power control command to the rectifier to instruct the rectifier to adjust the conversion output according to the amount of power to be adjusted for supply and demand, causing the rectifier to adjust the amount of charge and discharge of the storage battery and control the amount of AC input from the commercial power source to the uninterruptible power supply; Equipped with The uninterruptible power supply is the rectifier adjusts the conversion output based on the input power control command and adjusts the charge / discharge amount of the storage battery, thereby performing a demand response operation to control the amount of AC input from the commercial power source. Uninterruptible power supply system.

8. a time period from when the demand response command is acquired by the acquisition unit of the control device to when the demand response operation is executed in the uninterruptible power supply is within a first predetermined time period, and the uninterruptible power supply continues to execute the demand response operation for a second predetermined time period or more; 8. The uninterruptible power supply system according to claim 7.

9. The first predetermined time is 10 seconds, and the second predetermined time is 5 minutes.

9. The uninterruptible power supply system according to claim 8.

10. the storage battery includes a storage battery monitoring device that monitors the remaining energy of the storage battery; The battery monitoring device calculates a minimum amount of power that the uninterruptible power supply should reserve in order to supply the required power to the load in the event of a power outage of the commercial power supply, and sets the calculated amount as a minimum required amount of power, and when it is determined during the demand response operation that the remaining amount of power in the storage battery is equal to or less than the minimum required amount of power, outputs a discharge stop command to the rectifier to instruct the storage battery to stop discharging.

8. The uninterruptible power supply system according to claim 7.

11. The rectifier is When the uninterruptible power supply detects a power outage of the commercial power supply, the uninterruptible power supply stops the conversion output, thereby discharging the storage battery.

8. The uninterruptible power supply system according to claim 7.

12. The uninterruptible power supply system includes a plurality of uninterruptible power supply devices connected in parallel to the load, The control device identify the number of operating uninterruptible power supply devices among the plurality of uninterruptible power supply devices, calculate the minimum amount of power that each uninterruptible power supply device should have secured based on the minimum amount of power that the plurality of uninterruptible power supply devices should have secured in order to supply the required power to the load in the event of a power outage of the commercial power supply and the number of the operating uninterruptible power supply devices, and transmit the calculated amount of power to the battery monitoring device; 11. The uninterruptible power supply system according to claim 10.

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