Power system

Abstract

To provide a power system capable of supplying primary adjustment power when performing power control using a guidance command value.SOLUTION: The power system S1 includes a plurality of power control devices B1 that calculate, using the guidance command value, a device target that is a target value of power outputted by the connected power device X, and a processing device B1 that generates control information for each of the plurality of power control devices A1 to perform distributed power control of the power device X. The plurality of power control devices B1 include a delivery device B11 capable of performing delivery control of primary adjustment power and a non-delivery device B12 not capable of performing delivery control of primary adjustment power. The delivery device B11 includes the adjustment amount calculation unit 22 that calculates the individual adjustment amount, which is the power value to be adjusted in order to deliver the primary adjustment power, and the target calculation unit 25 that calculates the device target by adjusting the pre-delivery target value calculated from the guidance command value by the individual adjustment amount. The non-provided equipment B12 includes the target calculation unit 45 that calculates, as the equipment target, a value calculated from the guidance command value.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to power systems. [Background technology]

[0002] Power systems that manage multiple power control devices connected to a power grid and control power reception from the power grid are becoming more common. For example, Patent Document 1 discloses an example of a power system that includes multiple power control devices and a processing device. The processing device calculates an induction command value for setting node power to a target power. The node power is the power at a node between the power system (multiple power control devices) and the power grid. Each power control device controls output power in a distributed manner using the induction command value calculated by the processing device. At this time, each power control device calculates a target value for output power based on an optimization problem using the induction command value. Then, the output power is controlled so that the output power reaches the target value. In this way, energy management of the power system is performed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-150690 Summary of the Invention [Problem to be solved by the invention]

[0004] General electricity transmission and distribution companies (T&D companies) adjust the balance between electricity supply and demand (supply and demand balance) to ensure a stable supply of electricity. If the supply and demand balance is disrupted, the frequency of the power supplied from the power grid may fluctuate, potentially affecting the operation of factory production machinery or causing large-scale power outages. To address this issue, supply and demand balancing markets have been partially established as a market for general electricity transmission and distribution companies to procure balancing capacity. Adjustment capacity is the power used for frequency regulation and supply and demand adjustment. Adjustment capacity handled in the supply and demand balancing market is classified as primary adjustment capacity, secondary adjustment capacity (1, 2), or tertiary adjustment capacity (1, 2) based on requirements such as response time and output duration. Companies providing adjustment capacity in the supply and demand balancing market must meet the requirements for primary adjustment capacity, secondary adjustment capacity, and tertiary adjustment capacity, respectively. For example, companies providing primary adjustment capacity must be equipped with the ability to detect fluctuating frequency deviations at their own end and respond to reduce the frequency deviations.

[0005] The present disclosure has been devised in consideration of the above circumstances, and its purpose is to provide a power system that is capable of providing primary control capacity when performing power control using an induction command value. [Means for solving the problem]

[0006] The power system provided by the present disclosure is a power system that controls connection point power at a connection point with a power grid, and includes a plurality of power control devices that are connected to the power grid via the connection points and calculate device targets, which are target values ​​for the output power of connected power devices, using induced command values, and a processing device that generates control information for each of the plurality of power control devices to control the output of the power devices in a distributed manner, and the plurality of power control devices include at least one supply device that is capable of controlling the supply of primary control capacity and at least one non-supply device that is not capable of controlling the supply of primary control capacity, and the connection point power, which is the power at the connection points, is calculated based on the primary control capacity and , and system power, which is the output power of the entire system when the primary control capacity is not provided, the induced command value is generated using the control information and is a value for making the system power an overall target, which is a target value of the system power, and each of the at least one providing device includes an adjustment range calculation unit that calculates an individual adjustment range, which is a power value to be adjusted to provide the primary control capacity, and a first target calculation unit that calculates the equipment target by adjusting the pre-providing target value calculated from the induced command value by the individual adjustment range, and each of the at least one non-providing device includes a second target calculation unit that calculates a value calculated from the induced command value as the equipment target.

[0007] In a preferred embodiment of the power system, the processing device generates the difference value between the overall target and the connection point power value as the control information, the induced command value is calculated from the pre-adjustment control value that takes into account the control information and an overall adjustment range, and the overall adjustment range is the sum of the individual adjustment ranges of each of the at least one supply device.

[0008] In a preferred embodiment of the power system, each of the at least one supply device includes an estimation unit that estimates the overall adjustment range from the individual adjustment range calculated by the adjustment range calculation unit, and in each of the at least one supply device, the estimation unit estimates the overall adjustment range by multiplying the individual adjustment range by the ratio of a total capacity, which is the sum of the individual capacities of the power equipment connected to each of the at least one supply device, to an individual capacity, which is the rated capacity of the power equipment connected to the supply device.

[0009] In a preferred embodiment of the power system, each of the at least one supply device includes a first command value calculation unit that calculates the induced command value, and in each of the at least one non-supply device, the second target calculation unit uses the induced command value calculated by the first command value calculation unit.

[0010] In a preferred embodiment of the power system, each of the at least one non-supply device includes a second command value calculation unit that calculates the induced command value using the overall adjustment range estimated by the estimation unit, and in each of the at least one non-supply device, the second target calculation unit uses the induced command value calculated by the second command value calculation unit.

[0011] In a preferred embodiment of the power system, the power system further comprises an overall adjustment width calculation unit that calculates an overall adjustment width using a deviation of a connection point frequency, which is the frequency of the voltage at the connection point, from a reference frequency of the connection point frequency, and the overall adjustment width is the sum of the individual adjustment widths of each of the at least one supply device. [Effects of the Invention]

[0012] In the power system of the present disclosure, each of the at least one supply device includes an adjustment range calculation unit that calculates an individual adjustment range, which is a power value adjusted to supply primary control reserve, and a target calculation unit that calculates an equipment target by adjusting a pre-supply target value calculated from an induced command value by the individual adjustment range. Each of the at least one non-supply device includes a target calculation unit that calculates a value calculated from the induced command value as an equipment target. Here, the induced command value is generated using control information and is a value for adjusting the system power to an overall target, which is a target value for the system power. With this configuration, the output power of each supply device includes power for adjusting the system power to the overall target and primary control reserve. Furthermore, the output power of each non-supply device is power for adjusting the system power to the overall target. Therefore, with the power system of the present disclosure, it is possible to supply primary control reserve by each supply device while performing power control of each power control device (each supply device and each non-supply device) in a decentralized manner using the induced command value. In other words, the power system of the present disclosure is capable of providing primary control reserve when performing power control using an induction command value. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a functional block diagram showing a configuration example of a power system according to a first embodiment. [Figure 2] FIG. 3 is a functional block diagram showing a configuration example of a power system according to a first modified example of the first embodiment. [Figure 3] FIG. 10 is a functional block diagram showing a configuration example of a power system according to a second modification of the first embodiment. [Figure 4] FIG. 10 is a functional block diagram showing a configuration example of a power system according to a second embodiment. [Figure 5] FIG. 10 is a functional block diagram showing a configuration example of a power system according to a modified example of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the power system of the present disclosure will be described below with reference to the accompanying drawings. In the following, identical or similar components will be designated by the same reference numerals, and redundant description will be omitted.

[0015] Fig. 1 shows a power system S1 according to the first embodiment. As shown in Fig. 1, the power system S1 includes a power line 90, a processing device A1, a plurality of power control devices B1, and a power receiving facility C1.

[0016] The power system S1 is connected to the power system D via a connection point Y. The power system S1 can receive power from the power system D. The power system S1 can also transmit power to the power system D (capable of reverse power flow). In the present disclosure, when power is being output from the power system S1 to the power system D (i.e., when reverse power flow is occurring), the connection point power is assumed to be a positive value. On the other hand, when power is being output from the power system D to the power system S1, the connection point power is assumed to be a negative value. The connection point power refers to the power at the connection point Y between the power system S1 and the power system D.

[0017] The power system S1 performs power control in cooperation with the processing device A1 and multiple power control devices B1 so that the system power, which is the output power of the power system S1, reaches a target value for the system power (hereinafter referred to as the "overall target"). Examples of the power control performed by the power system S1 include output reduction control, peak cut control, reverse flow avoidance control, and schedule control. Output reduction control reduces the power output from the power system S1 to the power grid D (power to be sold) in accordance with an output reduction command issued by the power company. Peak cut control reduces the peak value of the power supplied from the power grid D (power to be purchased). Reverse flow avoidance control reduces the occurrence of reverse flow. Schedule control sets the output power of the power system S1 to a power value set by the user. The power system S1 performs one of these power controls depending on the control mode set in the processing device A1.

[0018] Furthermore, the power system S1 provides primary control reserve to the power system D by adjusting the output power to the power system D in accordance with fluctuations in the frequency of the voltage at the connection point Y. When the balance between power supply and demand (supply and demand balance) in the power system D is disrupted, the voltage frequency of the power system D fluctuates. For example, when demand exceeds supply in the power system D, the power frequency in the power system D decreases. In this case, the power system S1 adjusts the power supply and demand balance by increasing the power supplied to the power system D, thereby suppressing a decrease in the voltage frequency in the power system D. On the other hand, when demand falls below supply in the power system D, the power frequency in the power system D increases. In this case, the power system S1 adjusts the power supply and demand balance by reducing the power supplied to the power system D, thereby suppressing an increase in the voltage frequency in the power system D. Primary control reserve is power that is adjusted in response to frequency fluctuations to adjust the power supply and demand balance. In the present disclosure, the frequency fluctuations that occur in response are "very short-period" fluctuations, which are demand fluctuations of, for example, several seconds to several minutes. Therefore, the power system S1 adjusts the supply and demand balance of the power grid D by providing a primary regulation reserve in response to frequency fluctuations of the voltage at the node Y.

[0019] The power system S1 trades primary control reserve with a supply-demand balancing market (not shown) using a trading system (not shown). The supply-demand balancing market is operated, for example, by a general electricity transmission and distribution company. In the supply-demand balancing market, the time is divided into, for example, three-hour blocks (from 0:00 to 3:00, from 3:00 to 6:00, ..., from 21:00 to 24:00), and the control reserve (ΔkW) for each three-hour block is traded as a commodity block. Note that the above three-hour block is an example and may be changed according to the regulations of the supply-demand balancing market. When a transaction with the supply-demand balancing market is concluded, the power system S1 provides primary control reserve to the power grid D in the commodity block for which the transaction was concluded. Note that the power system S1 does not provide primary control reserve during time periods other than the commodity block for which the transaction was concluded. In a commodity block for which a transaction has been concluded, the power system S1 performs power control so that the system power reaches the overall target, while also performing control to provide primary control reserve. In a commodity block for which a transaction has been concluded, the connection point power includes system power and primary control reserve. In time periods other than the commodity block for which a transaction has been concluded, the power system S1 performs power control so that the system power reaches the overall target, and does not perform control to provide primary control reserve. In time periods other than the commodity block for which a transaction has been concluded, the connection point power includes system power but does not include primary control reserve.

[0020] The power load L consumes the supplied power. The power load L can receive power from the power system D or each power control device B1 via the power receiving equipment C1. The power load L includes general loads and important loads. The general load is, for example, an electrical device that is relatively unaffected even if power is cut off during a disaster, such as air conditioning equipment. The important load is an important load that requires a continuous supply of power even during a disaster, such as an emergency elevator, electrical equipment that requires continuous operation, and building lighting. The power load L may be configured to include only either a general load or an important load.

[0021] The power lines 90 constitute a power network in the power system S1. The power system S1 is connected to a power grid D by the power lines 90. As shown in FIG. 1 , the power lines 90 include a line connecting the power receiving facility C1 to a power load L and a line connecting the power receiving facility C1 to each power control device B1.

[0022] The power receiving equipment C1 is configured to include a distribution board and a power distribution panel. The power receiving equipment C1 also includes various protection devices for connecting the power system S1 to the power grid D. The power receiving equipment C1 can receive power input via a power line 90 from the power grid D and each of the multiple power control devices B1. The power receiving equipment C1 can supply the received power to the power grid D, the multiple power control devices B1, power loads L, and the like. The power receiving equipment C1 can communicate with the processing device A1.

[0023] As shown in FIG. 1, the power receiving facility C1 includes a measurement unit 31 and a communication unit 32. The measurement unit 31 is installed at a connection point Y between the power system S1 and the power grid D, and measures the connection point power. The connection point power is power obtained by superimposing primary control capacity on the system power. The measurement unit 31 is, for example, a power transducer. The communication unit 32 transmits the measurement result of the measurement unit 31, i.e., the measurement value of the connection point power, to the processing device A1.

[0024] Each of the multiple power control devices B1 is connected to power equipment X connected to the power receiving facility C1 and controls the output of the power equipment X. Similar to the power system described in Patent Document 1, the power equipment X is, for example, a solar cell, a storage battery, an electric vehicle, or a generator. In the power system S1, each of the multiple power control devices B1 is one of a solar power conditioner connected to a solar cell as the power equipment X, a storage battery power conditioner connected to a storage battery as the power equipment X, an electric vehicle (EV) stand connected to an electric vehicle as the power equipment X, and a generator control device connected to a generator as the power equipment X. The storage battery is, for example, a secondary battery such as a lithium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, or a lead-acid battery, or a capacitor such as an electric double-layer capacitor. An electric vehicle is a vehicle that can run using an electric motor as a power source and includes vehicles equipped with an internal combustion engine (for example, a plug-in hybrid vehicle). The electric motor is operated by power stored in a storage battery provided in the electric vehicle. A generator converts thermal energy contained in fuels such as oil, coal, and gas into mechanical energy and generates electricity using this mechanical energy. Note that the generator may also be a power generation device that uses renewable energy other than solar energy (e.g., wind power, hydropower, biomass, geothermal energy, etc.). For example, all of the multiple power control devices B1 may be configured with solar power conditioners or storage battery power conditioners. Furthermore, the multiple power control devices B1 may be configured with at least one solar power conditioner and at least one storage battery power conditioner. In other words, the multiple power control devices B1 may include any one of a solar power conditioner, a storage battery power conditioner, an EV stand, or a generator control device. Note that the solar power conditioner controls the power generated by a solar cell as power equipment X. The storage battery power conditioner controls the charging and discharging of a storage battery as power equipment X. The EV stand controls the charging and discharging of an electric vehicle as power equipment X. The generator control device controls the power generated by power equipment X.The plurality of power control devices B1 may also include a load control device that uses a power load L as power equipment X, similar to the power system described in Patent Document 1. The load control device controls the power load L connected to the power receiving facility C1, and is, for example, a building energy management system (BEMS) or a factory energy management system (FEMS).

[0025] In this embodiment, the multiple power control devices B1 include multiple supply devices B11 each capable of controlling the supply of primary control reserve and multiple non-supply devices B12 each incapable of controlling the supply of primary control reserve. The number of supply devices B11 and the number of non-supply devices B12 may each be one. Each of the multiple supply devices B11 is, for example, a battery power conditioner or a generator control device among the types of power control device B1 described above (such as a solar power conditioner, a battery power conditioner, an EV stand, a generator control device, and a load control device), but is not limited thereto and may also be a solar power conditioner, an EV stand, or a load control device. Each of the multiple non-supply devices B12 is, for example, a solar power conditioner, an EV stand, or a load control device among the types of power control device B1 described above, but is not limited thereto and may also be a battery power conditioner or a generator control device.

[0026] Each of the multiple supply devices B11 can communicate with the processing device A1. Each of the multiple supply devices B11 controls its own output power using information (control information, described below) received from the processing device A1. The output power control performed by each supply device B11 includes power control for setting the system power to an overall target (hereinafter referred to as "system power control") and power control for providing primary control reserve (hereinafter referred to as "primary control reserve control"). Each supply device B11 performs system power control and primary control reserve control in a product block for which a transaction has been concluded. On the other hand, each supply device B11 only performs system power control (does not perform primary control reserve control) in time periods other than the product block for which a transaction has been concluded. In primary control reserve control, each supply device B11 measures the frequency of the output voltage at its own end and calculates the frequency deviation from a reference frequency. The reference frequency is a frequency specified in the power grid D, for example, 50 Hz in eastern Japan and 60 Hz in western Japan. The "own end" refers to the output end of the output power in each supply device B11. Then, the output power is adjusted according to the calculated frequency deviation so as to reduce the frequency deviation. The specific configuration of each supply device B11 will be described later.

[0027] Each of the multiple non-supply devices B12 can communicate with at least one of the multiple supply devices B11. Each of the multiple non-supply devices B12 controls its own output power using information (guidance command value, described below) received from at least one of the supply devices B11 with which it can communicate. The output power control performed by each non-supply device B12 includes the above-mentioned system power control, but does not include primary regulation reserve control. Each of the multiple non-supply devices B12 performs system power control both in commodity blocks in which transactions have been successful and in time periods other than those commodity blocks. The specific configuration of each non-supply device B12 will be described later.

[0028] The processing device A1 generates information (control information described below) for each of the multiple power control devices B1 to control output power. The processing device A1 can communicate with each of the multiple power supply devices B11 and the power receiving equipment C1 among the multiple power control devices B1. This communication may be wireless or wired. As shown in FIG. 1, the processing device A1 includes a first acquisition unit 11, a second acquisition unit 12, a generation unit 13, a reception unit 14, a transmission unit 15, and a total capacity calculation unit 16.

[0029] The first acquisition unit 11 acquires the node power. In the present embodiment, the first acquisition unit 11 receives a measurement value of the node power from the power receiving facility C1 via the receiver 14, thereby acquiring the value (measurement value) of the node power.

[0030] The second acquisition unit 12 acquires the overall target. For example, the second acquisition unit 12 acquires the overall target by receiving the overall target via the receiving unit 14 from a computer (not shown) of a power company or a computer (not shown) that inputs settings of the processing device A1. Note that the computer that acquires the overall target is not limited to these. Alternatively, the second acquisition unit 12 may acquire the overall target by reading out the overall target stored in a memory unit (not shown) provided in the processing device A1. For example, the second acquisition unit 12 acquires the overall target according to the control mode set in the processing device A1.

[0031] The generation unit 13 generates control information using the measurement value of the connection point power acquired by the first acquisition unit 11 and the overall target acquired by the second acquisition unit 12. The control information is information for controlling the connection point power. In this embodiment, the generation unit 13 generates the difference between the measurement value of the connection point power and the overall target as the control information. That is, the control information includes a difference value ΔP, which is the difference between the measurement value of the connection point power and the overall target. In this embodiment, the difference value ΔP is a value obtained by subtracting the connection point power value P from the overall target Pc (ΔP=Pc-P).

[0032] The total capacity calculation unit 16 acquires information on the rated capacity of the power equipment X connected to each supply device B11 from each supply device B11 via the receiving unit 14. Hereinafter, the rated capacity of each supply device B11 may be referred to as an "individual capacity." The total capacity calculation unit 16 adds up the acquired rated capacities (individual capacities) of the power equipment X to calculate a total value of the individual capacities. This total value may be referred to as a "total capacity."

[0033] The receiver 14 receives the measured value of the connection point power from the power receiving equipment C1 through communication with the power receiving equipment C1. The receiver 14 also receives the overall target from the aforementioned power company computer or a computer that inputs the settings of the aforementioned processing device A1. The receiver 14 also receives information on the rated capacity (individual capacity) of the connected power equipment X from each supply device B11. The receiver 14 may receive the measured value of the connection point power, the overall target, and the rated capacity information in a common module or in different modules. The transmitter 15 transmits control information and total capacity information to each supply device B11 through communication with the respective supply devices B11. The transmitter 15 may transmit the control information and total capacity information in a common module or in different modules.

[0034] 1, each of the plurality of supply devices B11 includes a receiving unit 211, a transmitting unit 212, an adjustment width calculating unit 22, a control value calculating unit 23, a command value calculating unit 24, a target calculating unit 25, a power control unit 27, and an estimation unit 29. These components described below are common to each supply device B11 unless otherwise specified.

[0035] The receiving unit 211 receives control information (difference value ΔP) from the processing device A1 through communication with the processing device A1. The control information received by the receiving unit 211 is output to the control value calculation unit 23. Furthermore, the receiving unit 211 receives information on the total capacity from the processing device A1 through communication with the processing device A1. The information on the total capacity received by the receiving unit 211 is output to the estimation unit 29. The receiving unit 211 may receive the control information and the information on the total capacity in a common module or in different modules.

[0036] The transmitting unit 212 transmits information on the rated capacity (individual capacity) of the power device X to the processing device A1 through communication with the processing device A1. The information on the individual capacity transmitted by the transmitting unit 212 may be stored in the connected power device X and acquired from the power device X, or may be stored in the corresponding supply device B11. The transmitting unit 212 also transmits an induced command value calculated by a command value calculation unit 24 (described later) to each non-supply device B12. The transmitting unit 212 may transmit the information on the rated capacity (individual capacity) of the power device X and the induced command value via a common module or via different modules.

[0037] The adjustment range calculation unit 22 calculates an adjustment range, which is the power value adjusted for the provision of primary control capacity. Since each supply device B11 reduces the frequency deviation by providing primary control capacity, the calculated adjustment range is the magnitude of the power adjusted to reduce the frequency deviation at the output end of the power control unit 27. The adjustment range (absolute value) can also be said to be the control target of the primary control capacity in primary control capacity control. The adjustment range calculation unit 22 calculates an adjustment range according to the frequency deviation at the output end of the power control unit 27. The adjustment range calculation unit 22 calculates the adjustment range in primary control capacity control. Therefore, the adjustment range is not calculated (or the adjustment range is set to 0) in time periods other than those of product blocks in which transactions are completed. The adjustment range calculation unit 22 outputs the calculated adjustment range to the control value calculation unit 23. Hereinafter, the adjustment range calculated by the adjustment range calculation unit 22 will be referred to as the "individual adjustment range."

[0038] For example, the adjustment range calculation unit 22 calculates the individual adjustment range as follows. First, the adjustment range calculation unit 22 measures the frequency of the output voltage of the power control unit 27 as the output frequency using a measuring instrument (not shown). Next, the adjustment range calculation unit 22 calculates the frequency deviation of the output frequency from the aforementioned reference frequency (output frequency - reference frequency). The reference frequency is stored in advance in the adjustment range calculation unit 22. Next, the adjustment range calculation unit 22 calculates the individual adjustment range according to the frequency deviation.

[0039] When demand exceeds supply in power system D, the frequency of power in power system D decreases. As a result, the measured output frequency value becomes smaller than the reference frequency, and the calculated frequency deviation (output frequency - reference frequency) becomes a negative value. When the calculated frequency deviation is a negative value, adjustment range calculation unit 22 calculates, for example, a positive individual adjustment range to increase the output power of power control unit 27. On the other hand, when demand falls below supply in power system D, the frequency of power in power system D increases. As a result, the measured output frequency value becomes larger than the reference frequency, and the calculated frequency deviation (output frequency - reference frequency) becomes a positive value. When the calculated frequency deviation is a positive value, adjustment range calculation unit 22 calculates, for example, a negative individual adjustment range to decrease the output power of power control unit 27. Furthermore, when demand and supply in power system D are equal, the measured output frequency value becomes the same as the reference frequency, and the calculated frequency deviation (output frequency - reference frequency) becomes 0 (zero). When the calculated frequency deviation is 0 (zero), adjustment width calculation section 22 sets, for example, the individual adjustment width to 0 (zero) in order to maintain the current output power of power control section 27.

[0040] The adjustment range calculation unit 22 may calculate the individual adjustment range by taking into consideration predetermined setting items in addition to the frequency deviation. The predetermined setting items include the adjustment rate, the reference frequency, the rated output and reference frequency of the power control unit 27, etc. These setting items may be stored in advance in the adjustment range calculation unit 22, or may be acquired from other components as necessary. The adjustment range calculation unit 22 calculates the individual adjustment range by performing the calculation of the following equation (1), for example. In the following equation (1), P ctl_t1 is the individual adjustment width, dF is the frequency deviation (preferably the frequency deviation with an upper limit constraint), Pc is the rated output of the power control unit 27, and F ref is the reference frequency, and R is the adjustment ratio. In this way, by taking the above-mentioned setting items into consideration, the individual adjustment width can be calculated with higher accuracy. Note that the setting items are not limited to the above-mentioned example. Furthermore, the calculation performed by the adjustment width calculation unit 22 is not limited to the following equation (1).

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[0041] The estimation unit 29 estimates and outputs the overall adjustment range from the individual adjustment range. The overall adjustment range corresponds to the primary control capacity provided to the connection point Y when each supply device B11 provides the primary control capacity. The estimation unit 29 estimates the overall adjustment range by multiplying the individual adjustment range by an estimation coefficient. The estimation unit 29 calculates the individual adjustment range as P ctl_t1 , the overall adjustment range is P ctl_t2 , and performs calculation of the following equation (2) with an estimation coefficient K. The estimation coefficient K is the ratio of the total capacity to the individual capacity. The individual capacity is the rated capacity (individual capacity) of the power equipment X connected to the supply device B11 including the estimation unit 29, and the total capacity is the sum of the rated capacities of the power equipment X connected to each of the multiple supply devices B11. Therefore, if the individual capacity of the i-th power control device B1 is Wi, the estimation coefficient K is given by the following equation (3) (i is a positive integer, and n is the number of supply devices B11). In other words, the estimation unit 29 calculates the overall adjustment range by multiplying the individual adjustment range by the ratio of the total capacity to the individual capacity. For example, in a configuration in which the power system S1 includes two supply devices B11, the estimation coefficient K is given by the following equation (4) from the following equation (3). Therefore, the estimation unit 29 of the first supply device B11 calculates the overall adjustment range P by calculating the following equation (5). ctl_t2 As can be seen from these calculation formulas, the overall adjustment range corresponds to the sum of the individual adjustment ranges calculated by each supply device B11. When the individual capacities of the power devices X are the same, the number of supply devices B11 to which the power devices X are connected may be used as the estimation coefficient K. The estimation unit 29 outputs the estimated overall adjustment range to the control value calculation unit 23.

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[0042] The control value calculation unit 23 calculates the pre-adjustment control value by adding the overall adjustment range to the control information. In this embodiment, the receiving unit 211 receives the difference value ΔP as the control information, and the control value calculation unit 23 calculates the pre-adjustment control value by subtracting the overall adjustment range from the difference value ΔP. In other words, the pre-adjustment control value = difference value ΔP - overall adjustment range.

[0043] The command value calculation unit 24 calculates a guiding command value using the pre-adjustment control value. The guiding command value is a value used by each power control device B1 (each supply device B11 and each non-supply device B12) to calculate an equipment target. For example, the command value calculation unit 24 calculates a guiding command value pr(t) by solving the state equations (simultaneous differential equations) shown in the following equations (6) and (7). In the following equations (6) and (7), Px is the pre-adjustment control value (ΔP-total adjustment range), λ(t) is a state variable, pr(t) is the guiding command value, and ε is a gradient coefficient. This state equation is set in each supply device B11. The command value calculation unit 24 calculates the guiding command value every predetermined time (for example, 1 [sec]). The guiding command value calculated by the command value calculation unit 24 is output to the target calculation unit 25. The guidance command value calculated by the command value calculation unit 24 is transmitted via the transmission unit 212 to each non-supply device B12.

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[0044] The target calculation unit 25 calculates a target value (device target) of the output power of the corresponding power device X. The target calculation unit 25 performs a calculation using the input induction command value and adjusts the calculation result using the individual adjustment width to calculate the device target. As shown in FIG. 1, the target calculation unit 25 includes a calculation unit 251 and an adjustment unit 252.

[0045] The calculation unit 251 calculates a pre-supply target value of the output power of the corresponding power device X based on an optimization problem using the induction command value. The pre-supply target value is the output power value expected when individual output adjustment (adjustment in primary control capability) according to the frequency deviation is not performed, and corresponds to the output power value for controlling the system power to the overall target. This optimization problem includes an evaluation function and constraint conditions. The evaluation function is the same as that described in Patent Document 1, for example. In this embodiment, the calculation unit 251 performs the calculation of the following equations (8) and (9) derived from the evaluation function, as described in Patent Document 1. In the following equations (8) and (9), Pref is the output reference value of the power control device B1, pr is the induction command value, prlmt is the induction command value limit, and a1 to a4 are design parameters, respectively. The induction command value limit prlmt and the design parameters a1 to a4 are the same as those described in Patent Document 1. Then, as described in Patent Document 1, the calculation result is corrected using the constraint conditions to calculate the output reference value. The constraint conditions are the same as those described in Patent Document 1. Alternatively, the calculation unit 251 may calculate the pre-supply target value by solving the evaluation function under the constraint conditions.

number

[0046] The adjustment unit 252 calculates the equipment target by adjusting the calculation result (pre-supply target value) of the calculation unit 251 using the individual adjustment range. In this embodiment, the adjustment unit 252 calculates the equipment target by adding the individual adjustment range to the pre-supply target value. In other words, equipment target = pre-supply target value + individual adjustment range. Through this adjustment, the equipment target calculated by the target calculation unit 25 becomes a combination of the power target for making the system power the total power and the power target for providing primary control power. The equipment target calculated by the target calculation unit 25 is output to the power control unit 27.

[0047] The power control unit 27 controls the device power of the connected power device X so that the output power (hereinafter referred to as "device power") of the power device X becomes a device target. When the device target is a positive value, the power control unit 27 supplies power from the power device X to the power receiving facility C1, and when the device target is a negative value, the power control unit 27 supplies power from the power receiving facility C1 to the power device X.

[0048] 1, each of the non-supply devices B12 includes a receiving unit 411, a target calculation unit 45, and a power control unit 47. These components described below are common to each non-supply device B12 unless otherwise specified.

[0049] The receiving unit 411 receives a guidance command value from at least one of the plurality of supply devices B11 through communication with the supply device B11.

[0050] The target calculation unit 45 calculates a target value (device target) of the output power of the corresponding power device X. The target calculation unit 45 calculates the device target by performing calculation using the guidance command value received via the receiving unit 411. At this time, in a configuration in which the corresponding non-supply device B12 receives a guidance command value from any one of the multiple supply devices B11, the target calculation unit 45 uses the guidance command value received from the communicable supply device B11. In a configuration in which the corresponding non-supply device B12 receives a guidance command value from any two or more of the multiple supply devices B11, the target calculation unit 45 may use the guidance command value received from any one of the two or more communicable supply devices B11, or may use the average value of the guidance command values ​​received from the two or more communicable supply devices B11. The target calculation unit 45 calculates the device target by calculation similar to that of the calculation unit 251 of the target calculation unit 25. In other words, the target calculation unit 45 performs calculations of the above equations (8) and (9). However, unlike the target calculation unit 25, the target calculation unit 45 uses the calculation results of the above equations (8) and (9) as the device target.

[0051] The power control unit 47 controls the device power of the corresponding power device X so that the output power (device power) of the power device X becomes a device target. When the device target is a positive value, the power control unit 47 supplies power from the power device X to the power receiving facility C1, and when the device target is a negative value, the power control unit 47 supplies power from the power receiving facility C1 to the power device X.

[0052] In the power system S1, the processing device A1 acquires the value of the connection point power and the overall target, and generates control information (in this embodiment, the difference value ΔP). Then, the processing device A1 transmits the control information to each supply device B11. Each supply device B11 calculates a pre-adjustment control value by adding an overall adjustment range to the control information received from the processing device A1. In this embodiment, each supply device B11 calculates a pre-adjustment control value by subtracting the overall adjustment range from the difference value ΔP. The pre-adjustment control range calculated here is a value obtained by subtracting the primary control capacity supplied from each supply device B11 from the connection point power. Then, each supply device B11 uses the calculated pre-adjustment control value to calculate a induced command value according to the predetermined state equations (the above equations (6) and (7)). The induced command value calculated here is a value for bringing the system power to the overall target. Each supply device B11 uses the calculated induction command value to calculate a pre-supply target value of the power device X to be controlled based on a preset optimization problem, and calculates the device target by adding an individual adjustment range to the pre-supply target value. In this embodiment, each supply device B11 calculates the device target by adding the individual adjustment range to the pre-supply target value. Then, each supply device B11 controls the output power so that the output power of the power device X to be controlled becomes the device target. As a result, each supply device B11 controls the output power to reduce the frequency deviation while setting the system power to the overall target. Meanwhile, each non-supply device B12 uses the induction command value calculated by at least one of the multiple supply devices B11 to calculate the device target of the power device X to be controlled based on a preset optimization problem. Then, it controls the output power so that the output power of the power device X to be controlled becomes the device target. As a result, each non-supply device B12 controls the output power so that the system power becomes the overall target. That is, the power system S1 performs power control with the system power as an overall target, and provides primary regulation reserve in response to frequency fluctuations.

[0053] In the power system S1 configured as described above, the multiple power control devices B1 include at least one supply device B11 capable of controlling the supply of primary control reserve and at least one non-supply device B12 incapable of controlling the supply of primary control reserve. Each of the at least one supply device B11 includes an adjustment range calculation unit 22 that calculates an individual adjustment range, which is the power value adjusted to supply primary control reserve, and a target calculation unit 25 that calculates an equipment target by adjusting a pre-supply target value calculated from an induced command value by the individual adjustment range. Each of the at least one non-supply device B12 includes a target calculation unit 45 that calculates a value calculated from the induced command value as an equipment target. Here, the induced command value is generated using control information and is a value for adjusting the system power to an overall target, which is the target value of the system power. According to this configuration, the output power of each supply device B11 includes the power for adjusting the system power to the overall target and the primary control reserve. Furthermore, the output power of each non-supply device B12 is the power for adjusting the system power to the overall target. Therefore, in the power system S1, it is possible to perform power control of each power control device B1 (each supply device B11 and each non-supply device B12) in a decentralized manner using the induced command value, while allowing each supply device B11 to supply primary control reserve. In other words, the power system S1 is able to supply primary control reserve when performing power control using the induced command value.

[0054] In the power system S1 configured as described above, the processing device A1 generates the difference value ΔP between the overall target and the node power value as control information, and the induction command value is calculated from a pre-adjustment control value that takes into account the overall adjustment range in addition to the control information. Here, the overall adjustment range is the sum of the individual adjustment ranges of at least one supply device B11. With this configuration, even if at least one supply device B11 individually supplies primary control reserve in response to frequency fluctuations in the output voltage at its own end, the control value calculation unit 23 can calculate a pre-adjustment control value for when no primary control reserve is provided. In other words, even if each of the multiple power control devices B1 provides primary control reserve in response to frequency fluctuations in the output power at its own end, the power system S1 can individually control system power control and primary control reserve control, thereby appropriately providing primary control reserve.

[0055] In the power system S1 configured as described above, each of the at least one supply equipment B11 includes an estimation unit 29 that estimates an overall adjustment range from the individual adjustment range calculated by the adjustment range calculation unit 22, and the estimation unit 29 estimates the overall adjustment range by multiplying the individual adjustment range by the ratio of the total capacity, which is the sum of the individual capacities of the power equipment X connected to each of the at least one supply equipment B11, to the individual capacity, which is the rated capacity of the power equipment X connected to the supply equipment B11. According to this configuration, each of the at least one supply equipment B11 estimates the sum of the primary control capacity provided from the at least one supply equipment B11 as the overall adjustment range, and therefore the value of the connection point power in the case where the primary control capacity is not provided can be calculated as the pre-adjustment control range.

[0056] In the power system S1 configured as described above, each of the at least one supply device B11 includes a command value calculation unit 24 that calculates a induced command value. In each of the at least one non-supply device B12, the target calculation unit 45 uses the induced command value calculated by the command value calculation unit 24 of one of the at least one supply device B11. With this configuration, the processing device A1 only generates control information for calculating the induced command value and transmits it to each supply device B11. Therefore, the power system S1 can reduce the computational load of the processing device A1 compared to the power system described in Patent Document 1.

[0057] In the power system S1 configured as described above, each of the at least one non-supplying device B12 calculates an equipment target using a induced command value received from at least one supplying device B11. In a different configuration, each of the at least one non-supplying device B12 receives control information (in this embodiment, the difference value ΔP between the overall target and the node power value) from the processing device A1 and calculates an induced command value from the control information. This allows each non-supplying device B12 to calculate an equipment target from the induced command value calculated by itself. However, each non-supplying device B12 cannot calculate a primary control capability (individual adjustment range) corresponding to the frequency fluctuation of the output voltage at its own end, and therefore cannot calculate a pre-adjustment control range that takes into account the primary control capability superimposed on the node power. As a result, the equipment target calculated by each non-supplying device B12 does not correspond to a power value in system power control, preventing appropriate system power control. On the other hand, in the power system S1, each non-supply device B12 can use a guide command value calculated from the pre-adjustment control width by receiving a guide command value from at least one supply device B11. Therefore, the equipment target calculated by each non-supply device B12 becomes an appropriate power value for system power control, so the power system S1 can appropriately perform system power control. In other words, the power system S1 can perform system power control even when multiple power control devices B1 include at least one non-supply device B12.

[0058] 2 shows a power system S11 according to a first modification of the first embodiment. The power system S11 differs from the power system S1 in the following respects. First, the processing device A1 of the power system S11 transmits an induction command value to each power control device B1. Second, each power control device B1 (each supply device B11 and each non-supply device B12) of the power system S11 calculates an equipment target using the received induction command value.

[0059] In the power system S11, the measurement unit 31 of the power receiving equipment C1 measures the frequency of the voltage at the connection point as well as the connection point power. Hereinafter, the voltage at the connection point will be referred to as the "system voltage," and the frequency of the voltage at the connection point (system voltage) will be referred to as the "connection point frequency." Then, the communication unit 32 communicates the measurement value of the connection point power as well as the measurement value of the connection point frequency f P is transmitted to the processing device A1.

[0060] In the power system S11, the processing device A1 receives the measurement result of the measurement unit 31 (measurement value of the connection point power) and the measurement value f of the connection point frequency. P The processing device A1 also receives the individual capacity from each supply device B11.

[0061] 2, the processing device A1 of the power system S11 includes an overall adjustment width calculation unit 17. The overall adjustment width calculation unit 17 calculates the overall adjustment width by the following process. The overall adjustment width calculation unit 17 receives the measured value f of the connection point frequency via the receiving unit 14. P Then, the measured value of the connection point frequency f PThe calculation of the system adjustment range is similar to the calculation of the individual adjustment range performed by, for example, the adjustment range calculation unit 22. Specifically, the overall adjustment range calculation unit 17 calculates the frequency deviation of the connection point frequency (connection point frequency - reference frequency) from the reference frequency for the connection point frequency. Then, the overall adjustment range calculation unit 17 calculates the system adjustment range according to the frequency deviation. Also, the overall adjustment range calculation unit 17 calculates the total capacity in the same way as the total capacity calculation unit 16. Then, it calculates an estimation coefficient using an individual capacity received from one of the multiple supply devices B11. The estimation coefficient can be calculated in the same way as the estimation unit 29. After calculating the system adjustment range and the estimation coefficient, the overall adjustment range calculation unit 17 calculates the overall adjustment range using the calculated system adjustment range and estimation coefficient. The overall adjustment range can be calculated in the same way as the estimation unit 29. At this time, the overall adjustment range calculation unit 17 uses the system adjustment range instead of the individual adjustment range. The overall adjustment width calculation unit 17 outputs the calculated overall adjustment width to the generation unit 13 .

[0062] In the power system S11, the generation unit 13 of the processing device A1 includes, as shown in FIG. 2 , a difference calculation unit 131, a control value calculation unit 132, and a command value calculation unit 133. The difference calculation unit 131 calculates the difference (difference value ΔP) between the measurement value of the connection point power and the overall target, using the measurement value of the connection point power acquired by the first acquisition unit 11 and the overall target acquired by the second acquisition unit 12. The control value calculation unit 132 calculates a pre-adjustment control value, using the overall adjustment range calculated by the overall adjustment range calculation unit 17 and the difference value ΔP calculated by the difference calculation unit 131. The pre-adjustment control value can be calculated in the same manner as the control value calculation unit 23. The command value calculation unit 133 calculates a guided command value using the pre-adjustment control value. The guided command value can be calculated in the same manner as the command value calculation unit 24. The generating unit 13 transmits the generated guidance command value as control information via the transmitting unit 15 to each power control device B1 (each of the plurality of supplying devices B11 and each of the plurality of non-supplying devices B12).

[0063] In each supply device B11 of the power system S11, the target calculation unit 25 receives a induced command value as control information from the processing device A1 via the receiving unit 211. Then, similar to the power system S1, the calculation unit 251 calculates a pre-supply target value using the induced command value, and the adjustment unit 252 calculates an equipment target.

[0064] In each non-supply device B12 of the power system S11, the target calculation unit 45 receives the induction command value as control information from the processing device A1 via the receiving unit 411. Then, similar to the power system S1, the target of the device is calculated using the induction command value.

[0065] In the power system S11 configured as described above, similar to the power system S1, each of the at least one supply device B11 includes an adjustment range calculation unit 22 that calculates an individual adjustment range, which is the power value adjusted to supply primary control reserve, and a target calculation unit 25 that calculates an equipment target by adjusting a pre-supply target value calculated from an induced command value by the individual adjustment range. Each of the at least one non-supply device B12 includes a target calculation unit 45 that calculates a value calculated from the induced command value as an equipment target. Therefore, similar to the power system S1, the power system S11 can supply primary control reserve using each supply device B11 while performing power control of each power control device B1 (each supply device B11 and each non-supply device B12) in a decentralized manner using the induced command value. Therefore, the power system S11 can supply primary control reserve when performing power control using the induced command value. Furthermore, the power system S11 achieves the same effects as the power system S1 due to the configuration common to the power system S1.

[0066] In the power system S11 configured as described above, the processing device A1 calculates a pre-adjustment control width and calculates a guiding command value from the calculated pre-adjustment control width. The processing device A1 then transmits the calculated guiding command value to each power control device B1 as control information. Each power control device B1 receives the guiding command value (control information) and calculates an equipment target using the received guiding command value. With this configuration, since the processing device A1 calculates the guiding command value, each supply device B11 does not need to calculate the guiding command value. Therefore, the power system S11 can reduce the calculation load of each supply device B11 compared to the power system S1.

[0067] In the power system S11 configured as described above, the processing device A1 includes an overall adjustment range calculation unit 17. The overall adjustment range calculation unit 17 calculates the overall adjustment range using the deviation of the connection point frequency (the frequency of the voltage at the connection point) from the reference frequency of the connection point frequency. This configuration enables the processing device A1 to calculate the pre-control adjustment range.

[0068] 3 shows a power system S12 according to a second modification of the first embodiment. Power system S12 differs from power system S11 in the method of calculating the overall adjustment width.

[0069] In the power system S12, the adjustment range calculation unit 22 of each supply device B11 transmits the calculated individual adjustment range via the transmission unit 212 to the processing device A1.

[0070] In the processing device A1 of the power system S12, the overall adjustment range calculation unit 17 receives the individual adjustment ranges from each supply device B11 via the receiving unit 14. Then, the overall adjustment range is calculated by adding up the individual adjustment ranges of each supply device B11 that have been received.

[0071] The power system S12 has the same effects as the power system S11. Furthermore, in the power system S12, the overall adjustment range calculation unit 17 calculates the overall adjustment range by summing the individual adjustment ranges received from each supply device B11. With this configuration, the power system S12 can reduce the calculation load of the overall adjustment range calculation unit 17 compared to the power system S11.

[0072] In an example different from the above-described power systems S11 and S12, a part of the processing device A1 may be provided in an external device different from the processing device A1. For example, in the above-described power systems S11 and S12, an external device different from the processing device A1 may include the overall adjustment range calculation unit 17 and the generation unit 13. Furthermore, the external device may include only the overall adjustment range calculation unit 17.

[0073] 4 shows a power system S2 according to the second embodiment. The power system S2 differs from the power system S1 in the following respects. First, one of the multiple supply devices B11 transmits the overall adjustment range calculated by the estimation unit 29 to each non-supply device B12. Second, each of the multiple non-supply devices B12 receives the overall adjustment range and calculates a pre-adjustment control value using the received overall adjustment range.

[0074] In the power system S2, in at least one of the multiple supply devices B11, the estimation unit 29 transmits the calculated overall adjustment range to each non-supply device B12 via the transmission unit 212. Note that the transmission unit 212 may transmit information on the rated capacity (individual capacity) of the power device X in the supply device B11 and the overall adjustment range using a common module or different modules.

[0075] As shown in FIG. 4, in the power system S2, each non-supply device B12 includes a control value calculation unit 43 and a command value calculation unit 44.

[0076] The control value calculation unit 43 receives the control information (difference value ΔP) and the overall adjustment range via the receiving unit 411. The control value calculation unit 43 calculates the pre-adjustment control value in the same manner as the control value calculation unit 23 of each supply device B11. At this time, in a configuration in which the control value calculation unit 43 receives the overall adjustment range from any two or more of the plurality of supply devices B11, the control value calculation unit 43 may use the overall adjustment range received from any one of the two or more communication-capable supply devices B11, or may use the average value of the overall adjustment ranges received from the two or more communication-capable supply devices B11.

[0077] The command value calculation unit 44 receives the pre-adjustment control value calculated by the control value calculation unit 43. The command value calculation unit 44 calculates a guided command value, similar to the command value calculation unit 24 of each supply device B11. Then, the target calculation unit 45 calculates an equipment target using the guided command value calculated by the command value calculation unit 44.

[0078] In the power system S2 configured as described above, similar to the power system S1, each of the at least one supply device B11 includes an adjustment range calculation unit 22 that calculates an individual adjustment range, which is the power value adjusted to supply primary control reserve, and a target calculation unit 25 that calculates an equipment target by adjusting a pre-supply target value calculated from an induced command value by the individual adjustment range. Each of the at least one non-supply device B12 includes a target calculation unit 45 that calculates a value calculated from the induced command value as an equipment target. Therefore, similar to the power system S1, the power system S2 can supply primary control reserve using each supply device B11 while performing power control of each power control device B1 (each supply device B11 and each non-supply device B12) in a decentralized manner using the induced command value. Therefore, the power system S2 can supply primary control reserve when performing power control using the induced command value. Furthermore, the power system S2 achieves the same effects as the power system S1 due to the configuration common to the power system S1.

[0079] In the power system S2 configured as described above, each of the at least one non-supply device B12 includes a command value calculation unit 44 that calculates a induced command value using the overall adjustment range estimated by the estimation unit 29 of the at least one supply device B11. In each of the at least one non-supply device B12, the target calculation unit 45 uses the induced command value calculated by the command value calculation unit 44. With this configuration, the processing device A1 only generates control information for calculating the induced command value and transmits it to each supply device B11. Therefore, the power system S1 can reduce the computational load of the processing device A1 compared to the power system described in Patent Document 1.

[0080] As can be understood from the second embodiment, in the multiple power control devices B1, the induction command value is not limited to being calculated by at least one supply device B11, but not by at least one non-supply device B12. For example, it is also possible to have at least one supply device B11 and at least one non-supply device B12 calculate the induction command value separately.

[0081] 5 shows a power system S21 according to a modification of the second embodiment. The power system S21 differs from the power system S2 in the following respects. First, the processing device A1 of the power system S21 calculates an overall adjustment range and transmits the overall adjustment range together with control information to each power control device B1. Second, each power control device B1 receives the control information and the overall adjustment range and calculates a pre-adjustment control value.

[0082] 5, the processing device A1 of the power system S21 includes an overall adjustment range calculation unit 17 that calculates an overall adjustment range, similar to the processing devices A1 of the power systems S11 and S12. The overall adjustment range calculation unit 17 of the power system S21 may calculate the overall adjustment range similar to the overall adjustment range calculation unit 17 of the power system S11, or may calculate the overall adjustment range similar to the overall adjustment range calculation unit 17 of the power system S12. The calculated overall adjustment range is then transmitted to each power control device B1 via the transmission unit 15.

[0083] Each supply device B11 receives control information (difference value ΔP) and an overall adjustment range from the processing device A1. Then, a pre-control adjustment range is calculated by a control value calculation unit 23, and a guidance command value is calculated by a command value calculation unit 24. Also, each non-supply device B12 receives control information (difference value ΔP) and an overall adjustment range from the processing device A1. Then, a pre-control adjustment range is calculated by a control value calculation unit 43, and a guidance command value is calculated by a command value calculation unit 44.

[0084] In the power system S21 configured as described above, similar to the power system S2, each of the at least one supply device B11 includes an adjustment range calculation unit 22 that calculates an individual adjustment range, which is the power value adjusted to supply primary control reserve, and a target calculation unit 25 that calculates an equipment target by adjusting a pre-supply target value calculated from an induced command value by the individual adjustment range. Each of the at least one non-supply device B12 includes a target calculation unit 45 that calculates a value calculated from the induced command value as an equipment target. Therefore, similar to the power system S2, the power system S21 can supply primary control reserve using each supply device B11 while performing power control of each power control device B1 (each supply device B11 and each non-supply device B12) in a decentralized manner using the induced command value. Therefore, the power system S21 can supply primary control reserve when performing power control using the induced command value. Furthermore, the power system S21 achieves the same effects as the power system S2 due to the configuration common to the power system S2.

[0085] In an example different from the power system S21, a part of the processing device A1 may be provided in an external device different from the processing device A1. For example, in the above-described power system S21, an external device different from the processing device A1 may include the overall adjustment range calculation unit 17 and the generation unit 13. Furthermore, the external device may include only the overall adjustment range calculation unit 17.

[0086] In the above-described first and second embodiments (including their modified examples), an example has been shown in which the first acquisition unit 11 of the processing device A1 acquires a measured value of the power receiving equipment C1 as the value of the connection point power. In a configuration different from this example, the first acquisition unit 11 of the processing device A1 may receive, via communication, values ​​of device power (output power) from each power control device B1 and values ​​of power consumption from the power load L, and acquire an estimated value calculated from the received values ​​of each device power and power consumption. Note that either the measured value or the estimated value may be selectively used as the connection point power depending on the control mode set in the processing device A1.

[0087] The power system according to the present disclosure is not limited to the above-described embodiment, and the specific configuration of each part of the power system according to the present disclosure can be freely modified in various ways. [Explanation of symbols]

[0088] S1, S11, S12, S2, S21: power system, A1: processing device, B1: power control device, B11: supply device, B12: non-supply device, D: power system, X: power equipment, Y: connection point, 13: generation unit, 17: overall adjustment range calculation unit, 22: adjustment range calculation unit, 24: command value calculation unit (first command value calculation unit), 25: target calculation unit (first target calculation unit), 29: estimation unit, 44: command value calculation unit (second command value calculation unit), 45: target calculation unit (second target calculation unit)

Claims

1. An electric power system for controlling connection point power at a connection point with an electric power grid, a plurality of power control devices connected to the power grid via the connection points and configured to calculate device targets, which are target values ​​of output power of the connected power devices, using induced command values; a processing device that generates control information for each of the plurality of power control devices to perform output control of the power devices in a distributed manner; Equipped with the plurality of power control devices include at least one supply device capable of controlling the supply of primary control reserve and at least one non-supply device incapable of controlling the supply of primary control reserve, the node power, which is the power at the node, includes the primary control capacity and system power, which is the output power of the entire system when the primary control capacity is not provided; the induction command value is generated using the control information and is a value for making the system power an overall target, which is a target value of the system power; Each of the at least one supply device includes: an adjustment range calculation unit that calculates an individual adjustment range, which is a power value to be adjusted in order to supply the primary control power; and a first target calculation unit that calculates the equipment target by adjusting a pre-supply target value calculated from the induced command value by the individual adjustment range, A power system, wherein each of the at least one non-supply device includes a second target calculation unit that calculates a value calculated from the induced command value as the equipment target.

2. the processing device generates, as the control information, a difference value between the overall target and the value of the connection point power; the guidance command value is calculated from a pre-adjustment control value obtained by adding an overall adjustment range to the control information, The power system of claim 1 , wherein the total regulation range is a sum of the individual regulation ranges of each of the at least one delivery device.

3. Each of the at least one supply device includes an estimation unit that estimates the overall adjustment range from the individual adjustment range calculated by the adjustment range calculation unit, 3. The power system according to claim 2, wherein in each of the at least one supply device, the estimation unit estimates the overall adjustment range by multiplying the individual adjustment range by a ratio of a total capacity, which is the sum of the individual capacities of the power equipment connected to each of the at least one supply device, to an individual capacity, which is the rated capacity of the power equipment connected to the supply device.

4. Each of the at least one delivery device includes a first command value calculation unit that calculates the guidance command value, The power system according to claim 3 , wherein in each of the at least one non-supply device, the second target calculation unit uses the induced command value calculated by the first command value calculation unit.

5. Each of the at least one non-delivery device includes a second command value calculation unit that calculates the guidance command value using the overall adjustment range estimated by the estimation unit, The power system according to claim 3 , wherein in each of the at least one non-supply device, the second target calculation unit uses the induction command value calculated by the second command value calculation unit.

6. further comprising an overall adjustment width calculation unit that calculates an overall adjustment width using a deviation of a connection point frequency, which is a frequency of a voltage at the connection point, from a reference frequency of the connection point frequency; The power system of claim 1 , wherein the total regulation range is a sum of the individual regulation ranges of each of the at least one delivery device.

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