JP2023005861A - Power management device, power management system, and power management method - Google Patents

Abstract

To provide a power management device, a power management system, and a power management method that can appropriately control the supply-demand balance in an electric power system.SOLUTION: A power management device comprises: a management unit that manages two or more facilities connected with an electric power system and having distributed power supplies; a receiving unit that, in a predetermined period for adjusting the supply-demand balance in the electric power system, receives a demand message including an information element indicating power demand in each of the two or more facilities from each of the two or more facilities; a transmission unit that, in the predetermined period, transmits a control instruction for controlling the distributed power supply included in a second facility that can receive the demand message, while excluding a first facility that cannot receive the demand message; and a control unit that, assuming that the power demand in the first facility is adjusted according to a specific behavior, determines the details of the control instruction based on the demand message.SELECTED DRAWING: Figure 3

Description

The present invention relates to a power management device, a power management system, and a power management method.

BACKGROUND ART Conventionally, a system (VPP; Virtual Power Plant) is known that adjusts the supply and demand balance of a power system by controlling distributed power sources such as power storage devices installed in facilities. In VPP, control instructions are sent from a power management device such as an aggregator to distributed power sources.

Furthermore, in preparation for an abnormality in communication between the power management apparatus and the distributed power sources, the operation of the distributed power sources in a case where a communication abnormality occurs in a state where the communication between the power management apparatus and the distributed power sources is normal. A technology has also been proposed in which the power management device gives instructions in advance (for example, Patent Document 1).

JP 2017-38467 A

By the way, since the supply and demand balance of the power system depends on the power demand of the facility, the facility that participates in the adjustment of the supply and demand balance of the power system should transmit a message including an information element indicating the power demand of the facility to the power management device. is preferred.

Under this assumption, the operation of the distributed power sources in the event of a communication failure is instructed in advance by the power management device to the distributed power sources, and the power demand notified from the facility to the power management device is appropriately adjusted. It may not be reflected, and it may not be possible to properly control the supply and demand balance of the power system.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-described problems, and provides a power management device, a power management system, and a power management method that enable appropriate control of the supply and demand balance of a power system. With the goal.

A power management apparatus according to the disclosure includes a management unit that manages two or more facilities having distributed power sources connected to a power system; a receiving unit configured to receive a demand message including an information element indicating power demand from each of the two or more facilities; a transmission unit that transmits a control instruction for controlling the distributed power sources of a second facility; and a transmission unit that transmits the content of the control instruction based on the demand message on the assumption that the power demand of the first facility is adjusted by a specific behavior. and a control unit for determining.

A power management system according to the disclosure includes a management unit that manages two or more facilities having distributed power sources connected to a power system; a receiving unit configured to receive a demand message including an information element indicating power demand from each of the two or more facilities; a transmission unit that transmits a control instruction for controlling the distributed power sources of a second facility; and a transmission unit that transmits the content of the control instruction based on the demand message on the assumption that the power demand of the first facility is adjusted by a specific behavior. and a control unit for determining.

A disclosed power management method includes the steps of managing two or more facilities having distributed power sources connected to an electric power system, and controlling the demand of each of the two or more facilities during a predetermined period of adjusting the supply and demand balance of the electric power system. receiving a demand message including an information element indicating electric power from each of the two or more facilities; A step of transmitting a control instruction for controlling the distributed power sources owned by a facility, and a step of determining the content of the control instruction based on the demand message on the assumption that the power demand of the first facility is adjusted in a specific manner. And prepare.

Advantageous Effects of Invention According to the present invention, it is possible to provide a power management device, a power management system, and a power management method capable of appropriately controlling the supply and demand balance of a power system.

FIG. 1 is a diagram showing a power management system 100 according to an embodiment. FIG. 2 is a diagram showing a facility 300 according to an embodiment. FIG. 3 is a diagram showing the power management server 200 according to the embodiment. FIG. 4 is a diagram of a local controller 360 according to an embodiment. FIG. 5 is a diagram illustrating a power management method according to an embodiment. FIG. 6 is a diagram illustrating a power management method according to an embodiment. FIG. 7 is a diagram illustrating a power management method according to Modification 1. In FIG.

Embodiments will be described below with reference to the drawings. In addition, in the following description of the drawings, the same or similar reference numerals are given to the same or similar parts. However, the drawings are schematic.

[Embodiment]
(power management system)
The power management system will be described below.

As shown in FIG. 1 , the power management system 100 has a power management server 200 , facilities 300 and a power company 400 . In FIG. 1, as the facility 300, facilities 300A to 300C are illustrated.

Each facility 300 is connected to the power grid 110 . Hereinafter, the power flow from the power system 110 to the facility 300 is referred to as power flow, and the power flow from the facility 300 to the power system 110 is referred to as reverse power flow.

Power management server 200 , facility 300 and power company 400 are connected to network 120 . Network 120 may provide the circuits between these entities. For example, network 120 is the Internet. Network 120 may include a dedicated line such as a VPN (Virtual Private Network).

The power management server 200 is a server managed by businesses such as a power generation business, a power transmission and distribution business, a retail business, and a resource aggregator. The resource aggregator may be a power company that adjusts the power supply and demand balance of the power system 110 in a VPP (Virtual Power Plant). Adjustment of the power supply and demand balance may include trading (hereinafter, negawatt trading) in which the reduced power of the tidal power supplied from the power system 110 to the facility 300 (also referred to as the power demand of the facility 300) is exchanged for value. Balancing power supply and demand may include trading increased power for reverse flow power supplied from facility 300 to power system 110 for value. In the following, the request for adjusting the power supply and demand balance may be referred to as a power saving request. The resource aggregator may be an electric power company that provides reverse flow power to power generation companies, power transmission/distribution companies, retailers, and the like in the VPP.

The power management server 200 sends a control message that instructs the local control device 360 provided in the facility 300 to control the distributed power supply (for example, the solar cell device 310, the power storage device 320, or the fuel cell device 330) provided in the facility 300. to send. For example, the power management server 200 may transmit a power flow control message (for example, DR; Demand Response) requesting control of power flow, or may transmit a reverse power flow control message requesting control of reverse power flow. good. In addition, the power management server 200 may transmit power control messages that control the operating state of the distributed power sources. The degree of control of tidal power or reverse power flow is defined as an absolute value (e.g., , XX kW decrease or XX kW increase), and a relative value that represents the difference from the reference value (e.g., baseline power) (e.g., XX% decrease, XX% increase) may be represented by Alternatively, the degree of control of tidal power or reverse tidal power may be represented by two or more levels. The degree of control of tidal power or reverse tidal power may be represented by a power rate (RTP; Real Time Pricing) determined by the current power supply and demand balance, or may be represented by a power rate (TOU; Time Of Pricing) determined by the past power supply and demand balance. Use).

The facility 300 includes a solar cell device 310, a power storage device 320, a fuel cell device 330, a load device 340, a local control device 360, a power meter 380, and a power meter 390, as shown in FIG. have.

The solar cell device 310 is a distributed power source that generates power according to light such as sunlight. The solar cell device 310 may be an example of a distributed power supply that allows reverse power flow. The solar cell device 310 may be an example of a distributed power source to which a Feed-in Tariff (FIT) may be applied. The solar cell device 310 may be a distributed power source for which the feed-in tariff period has expired. For example, the solar cell device 310 is composed of a PCS (Power Conditioning System) and a solar panel.

Here, the power output from the solar cell device 310 may fluctuate depending on the amount of received light such as sunlight. Therefore, when considering the power generation efficiency of the solar cell device 310, the power output from the solar cell device 310 is variable power that can fluctuate depending on the amount of light received by the solar panel.

The power storage device 320 is a distributed power source that charges and discharges power. Power storage device 320 may be an example of a distributed power source in which reverse power flow is not allowed. The power storage device 320 may be an example of a distributed power source to which the fixed purchase price cannot be applied. For example, the power storage device 320 is composed of a PCS and power storage cells.

The fuel cell device 330 is a distributed power source that uses fuel to generate power. Fuel cell device 330 may be an example of a distributed power source in which reverse power flow is not allowed. Fuel cell device 330 may be an example of a distributed power source to which feed-in tariffs do not apply. For example, the fuel cell device 330 is composed of PCS and fuel cells.

For example, the fuel cell device 330 may be a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEFC), or a phosphoric acid fuel cell. It may be a type fuel cell (PAFC; Phosphoric Acid Fuel Cell) or a molten carbonate type fuel cell (MCFC; Molten Carbonate Fuel Cell).

In embodiments, the solar cell device 310, the power storage device 320 and the fuel cell device 330 may be a regulated power source used for VPP. A regulated power supply is a power supply that contributes to the VPP among distributed power supplies provided in the facility 300 .

The load device 340 is a device that consumes power. For example, the load device 340 is an air conditioner, a lighting device, an AV (Audio Visual) device, or the like.

The local control device 360 is a device (EMS; Energy Management System) that manages the power of the facility 300 . The local control device 360 may control the operating state of the solar cell device 310, may control the operating state of the power storage device 320 provided in the facility 300, and may control the operating state of the fuel cell device 330 provided in the facility 300. may be controlled. Details of the local controller 360 will be described later (see FIG. 4).

In an embodiment, communication between power management server 200 and local controller 360 occurs according to a first protocol. On the other hand, communication between the local controller 360 and distributed power sources is performed according to a second protocol different from the first protocol. For example, as the first protocol, a protocol conforming to Open ADR (Automated Demand Response) or a unique dedicated protocol can be used. For example, the second protocol can use a protocol conforming to ECHONET Lite (registered trademark), SEP (Smart Energy Profile) 2.0, KNX, or a unique dedicated protocol. The first protocol and the second protocol may be different. For example, even if both are proprietary protocols, they may be protocols created according to different rules. However, the first protocol and the second protocol may be protocols created according to the same rules.

The wattmeter 380 is an example of a trunk wattmeter that measures tidal power from the power system 110 to the facility 300 and reverse power from the facility 300 to the power system 110 . For example, power meter 380 is a smart meter belonging to power company 400 .

Here, the wattmeter 380 transmits to the local control device 360 a message including an information element indicating the integrated value of the power flow or reverse power flow per unit time (for example, 30 minutes). Power meter 380 may transmit messages autonomously or may transmit messages at the request of local controller 360 . The power meter 380 may transmit to the power management server 200 a message including an information element indicating the power flow power or the reverse power flow power in each unit time.

The wattmeter 390 is an example of an individual wattmeter that measures the power of each distributed power supply. The power meter 390 may be provided at the output of the PCS of the distributed power supply and may be considered part of the distributed power supply. In FIG. 2 , a wattmeter 391 , a wattmeter 392 , and a wattmeter 393 are provided as the wattmeter 390 . A power meter 391 measures the output power of the solar cell device 310 . Power meter 392 measures the discharged power of power storage device 320 . Power meter 392 may measure the charging power of power storage device 320 . A power meter 393 measures the individual output power of the fuel cell device 330 .

Here, the power meter 390 may transmit a message including an information element indicating the power of the distributed power supply to the local controller 360 at intervals shorter than the unit time (for example, 1 minute). The individual output power of distributed power sources may be represented by an instantaneous value or an integrated value. Power meter 390 may transmit messages autonomously or may transmit messages at the request of local controller 360 .

Returning to FIG. 1, power company 400 is an entity that provides infrastructure such as power system 110, and is, for example, a power generator or a power transmission and distribution company. The power company 400 may entrust various operations to an entity that manages the power management server 200 . The power company 400 may send a request message to the power management server 200 requesting adjustment of the supply and demand balance of the power system 110 .

(power management server)
The power management server will be described below. As shown in FIG. 3 , the power management server 200 has a management section 210 , a communication section 220 and a control section 230 . The power management server 200 may be an example of a VTN (Virtual Top Node). In embodiments, the power management server 200 is an example of a power management device.

The management unit 210 is configured by a storage medium such as a non-volatile memory and/or HDD, and manages information regarding the facility 300 . For example, the information about the facility 300 includes the types of distributed power sources provided in the facility 300, the specifications of the distributed power sources provided in the facility 300, and the like. The specifications may include the rated power generation of the solar cell device 310 , the rated charging power of the power storage device 320 , the rated discharging power of the power storage device 320 , and the rated output power of the fuel cell device 330 . The specifications may include the rated capacity of power storage device 320, the maximum charge/discharge power, and the like.

In the embodiment, the management unit 210 constitutes a management unit that manages two or more facilities 300 having distributed power sources connected to the power grid 110 .

The communication unit 220 is configured by a communication module and communicates with the local control device 360 via the network 120 . The communication module can be a wireless communication module conforming to standards such as IEEE802.11a/b/g/n, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., and a wired communication module conforming to standards such as IEEE802.3 It may be a communication module.

As described above, the communication unit 220 communicates according to the first protocol. For example, communication unit 220 transmits a first message to local controller 360 according to a first protocol. Communication unit 220 receives a first message response from local controller 360 according to a first protocol.

In the embodiment, the communication unit 220 receives, from each of the two or more facilities 300, a demand message including an information element indicating the power demand of each of the two or more facilities 300 during a predetermined period for adjusting the supply and demand balance of the power system 110. configure a receiver that The communication unit 220 may receive the demand message at the distributed power supply control cycle (for example, 1 minute).

The predetermined period may be a DR period in which suppression of tidal power (demand power) is requested, or an output suppression period in which suppression of reverse tidal power (output power) is requested. The power demand of facility 300 may be the current power measured by power meter 380 . The demand message may be received from power meter 380 and may be received from local controller 360 .

In the embodiment, the communication unit 220 constitutes a transmission unit that transmits a control instruction to control the distributed power sources of the second facility that can receive the demand message while excluding the first facility that cannot receive the demand message for a predetermined period of time. do. The communication unit 220 may transmit the control instruction at a distributed power source control cycle (for example, one minute).

Although not particularly limited, factors that prevent the demand message from being received may include factors resulting from an abnormality in network 120, and may include factors resulting from an abnormality in facility 300 (local controller 360, etc.). The reason why the demand message cannot be received is due to an abnormality in communication within the facility 300 (for example, an abnormality in communication between the local control device 360 and the power meter 380, an abnormality in communication between the local control device 360 and distributed power sources, etc.). may include a factor resulting from an abnormality in the power meter 380, or may include a factor resulting from an abnormality in a distributed power supply.

Control unit 230 may include at least one processor. The at least one processor may be composed of a single integrated circuit (IC) or may be composed of a plurality of communicatively connected circuits (such as integrated circuits and/or discrete circuits).

The control unit 230 controls each component provided in the power management server 200 . For example, the control unit 230 instructs the local control device 360 provided in the facility 300 to control distributed power sources provided in the facility 300 by transmitting a control message. The control message may be a power flow control message, a reverse power flow control message, or a power control message, as described above.

In an embodiment, the controller 230 may determine the content of the control instruction based on the demand message on the assumption that the power demand of the first facility will be adjusted in a specific manner. The specific behavior may be any behavior that affects power demand, and may be the behavior of distributed power sources (for example, power storage device 320).

For example, the control unit 230 selects the adjusted power expected to be adjusted at the first facility by a specific behavior (for example, Based on the adjustment power (ZZ (=XX-YY) kW, ZZ (=XX-YY)%, etc.) excluding YYkW reduction, YY% reduction, etc.), determine the control content of the control instruction for the second facility You may That is, the control unit 230 sets the adjusted power (ZZ (=XX-YY) kW, ZZ (=XX-YY) %, etc.) excluding the adjusted power assumed to be adjusted in the first facility by the specific behavior to the first facility. The content of control is determined so that the costs are shared by the two facilities. As a method of assuming the specific behavior, the following method can be considered.

First, the control unit 230 may assume specific behavior based on the power demand plan of the first facility. The power demand plan of the first facility may be notified from the first facility before starting the predetermined period, or may be determined in advance. The power demand plan for the first facility may include an operation plan for distributed power sources. The distributed power supply operation plan may include a charge/discharge plan for power storage device 320 . The charge/discharge plan for the power storage device 320 may include a plan for maintaining the power demand of the facility 300 at the target power (for example, 0 kW). The target power may be different for each time slot. Note that the specific behavior may be considered as a behavior of adjusting the power demand of the first facility according to the plan of the power demand of the first facility.

Secondly, the control unit 230 may assume a specific behavior based on the control details instructed before the start of the predetermined period for the distributed power sources of the first facility. The content of control may include the content of maintaining the power demand of the facility 300 at the target power (for example, 0 kW). The target power may be different for each time slot. It should be noted that the specific behavior may be considered to be the behavior of adjusting the power demand of the first facility according to the control content instructed before the start of the predetermined period.

Here, for the second facility, the control unit 230 determines the control content of the control instruction for controlling the distributed power sources of the second facility based on the demand message received from the second facility. In other words, the control unit 230 sequentially controls the distributed power sources by transmitting a control instruction based on the demand message in each control cycle. Such sequential control may be considered feedback control. According to such a configuration, the difference between the target value of the total power demand requested by the request message and the actual value of the total power demand of each facility 300 as a whole of the facilities 300 to be managed by the power management server 200 is sequentially calculated. can be effectively absorbed.

(local controller)
In the following, the local controller will be described. As shown in FIG. 4 , the local control device 360 has a first communication section 361 , a second communication section 362 and a control section 363 . The local controller 360 may be an example of a VEN (Virtual End Node).

The first communication unit 361 is configured by a communication module and communicates with the power management server 200 via the network 120 . The communication module can be a wireless communication module conforming to standards such as IEEE802.11a/b/g/n, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., and a wired communication module conforming to standards such as IEEE802.3 It may be a communication module.

As described above, the first communication unit 361 communicates according to the first protocol. For example, the first communication unit 361 receives the first message from the power management server 200 according to the first protocol. The first communication unit 361 transmits the first message response to the power management server 200 according to the first protocol.

The second communication unit 362 is configured by a communication module and communicates with distributed power sources. The communication module can be a wireless communication module complying with standards such as IEEE802.11a/b/g/n, ZigBee, Wi-SUN, LTE, 5G, 6G, etc., such as IEEE802.3 or proprietary proprietary protocols. It may be a standard-compliant wired communication module.

As described above, the second communication unit 362 communicates according to the second protocol. For example, the second communication unit 362 transmits the second message to the distributed power sources according to the second protocol. The second communication unit 362 receives the second message response from the distributed power sources according to the second protocol.

For example, the second communication unit 362 may receive a message from the power meter 380 that includes an information element specifying the tidal power or the reverse tidal power. The second communication unit 362 may receive from the power meter 390 a message including an information element specifying the power of each distributed power source.

Control unit 363 may include at least one processor. The at least one processor may be composed of a single integrated circuit (IC) or may be composed of a plurality of communicatively connected circuits (such as integrated circuits and/or discrete circuits).

The control unit 363 controls each component provided in the local control device 360 . Specifically, in order to control the power of the facility 300 , the control unit 363 instructs the equipment to set the operating state of the distributed power sources by transmitting the second message and receiving the second message response. The control unit 363 may instruct the distributed power sources to report the information of the distributed power sources by sending the second message and receiving the second message response in order to manage the power of the facility 300 .

In the embodiment, the control unit 363 may control the distributed power sources with the specific behavior described above when the control instruction cannot be received from the power management server 200 .

(Power management method)
The power management method is described below. Here, a case in which the predetermined period is the DR period is exemplified.

First, a case where a specific behavior is assumed based on the power demand plan of the first facility will be described with reference to FIG.

As shown in FIG. 5, in step S10, the power management server 200 receives a request message. The request message may be received from power company 400 .

In step S11A, the power management server 200 receives the power demand plan for the facility 300A from the facility 300A. In step S11B, the power management server 200 receives the power demand plan for the facility 300B from the facility 300B. In step S11C, the power management server 200 receives the power demand plan for the facility 300C from the facility 300C.

Here, the processes of steps S11A to S11C may be performed before the process of step S10 or after the process of step S10. The processing of steps S11A to S11C may be performed before the start of the DR period or after the start of the DR period.

In step S20A, power management server 200 receives a demand message from facility 300A during the DR period, and in step S20B, power management server 200 receives a demand message from facility 300B during the DR period. On the other hand, in step S20C, the power management server 200 cannot receive demand messages from the facility 300C during the DR period.

In FIG. 5, facility 300A and facility 300B are examples of the second facility, and facility 300C is an example of the first facility.

In step S21X, the power management server 200 assumes a specific behavior of the facility 300C based on the power demand plan received from the facility 300C.

In step S22X, the power management server 200 determines the content of the control instruction based on the demand message, assuming that the power demand of the facility 300C is adjusted with a specific behavior.

In step S23A, power management server 200 transmits a control instruction to facility 300A, and in step S23B, power management server 200 transmits a control instruction to facility 300B. The facility 300C regulates the power demand of the facility 300C by controlling the distributed power sources based on specific behaviors.

Although omitted in FIG. 5 for simplification of explanation, the processing of steps S20A to S20C, steps S21X, steps S22X, and steps S23A to S23B may be repeated during the DR period. In such cases, control instructions may be sent to facility 300C when demand messages can be received from facility 300C.

Secondly, a case in which a specific behavior is assumed based on the control contents instructed before the start of the predetermined period for the distributed power sources of the first facility will be described with reference to FIG. 6 .

As shown in FIG. 6, in step S10, the power management server 200 receives a request message. The request message may be received from power company 400 .

In step S12A, the power management server 200 transmits to the facility 300A a control instruction for the distributed power sources of the facility 300A. In step S12B, the power management server 200 transmits to the facility 300B a control instruction for the distributed power sources of the facility 300B. In step S12C, the power management server 200 transmits to the facility 300C a control instruction for the distributed power sources of the facility 300C.

Here, the processing of steps S12A to S12C may be performed before the processing of step S10 or after the processing of step S10. The processing of steps S12 to S12C is performed before the start of the DR period.

In step S20A, power management server 200 receives a demand message from facility 300A during the DR period, and in step S20B, power management server 200 receives a demand message from facility 300B during the DR period. On the other hand, in step S20C, the power management server 200 cannot receive demand messages from the facility 300C during the DR period.

In FIG. 6, facility 300A and facility 300B are examples of the second facility, and facility 300C is an example of the first facility.

In step S21Y, the power management server 200 assumes a specific behavior of the facility 300C based on the control details instructed before the start of the DR period for the distributed power sources of the facility 300C.

In step S22Y, the power management server 200 determines the content of the control instruction based on the demand message, assuming that the power demand of the facility 300C is adjusted by a specific behavior.

In step S23A, power management server 200 transmits a control instruction to facility 300A, and in step S23B, power management server 200 transmits a control instruction to facility 300B. The facility 300C regulates the power demand of the facility 300C by controlling the distributed power sources based on specific behaviors.

Although omitted in FIG. 6 for simplification of explanation, the processes of steps S20A to S20C, steps S21Y, S22Y, and steps S23A to S23B may be repeated during the DR period. In such cases, control instructions may be sent to facility 300C when demand messages can be received from facility 300C.

(Action and effect)
In the embodiment, the power management server 200 determines the content of the control instruction based on the demand message on the assumption that the power demand of the first facility, which cannot receive the demand message, is adjusted by a specific behavior, and determines the content of the control instruction, and the demand message cannot be received. A control instruction is sent to control the distributed power sources of a second facility that can receive the demand message, excluding the first facility. According to such a configuration, the power management server 200 grasps the power demand of the facility 300 to be adjusted by the power management server 200 based on the demand message, and transmits a control instruction based on the demand message at each control cycle. By doing so, it is possible to appropriately control the supply and demand balance of the power system 110 under the premise that the distributed power sources are controlled sequentially, even if a case is assumed in which the demand message cannot be received.

In the embodiment, it is assumed that the power demand of the first facility, which cannot receive the demand message, is adjusted by a specific behavior, and the content of the control instruction for the distributed power sources of the second facility is determined. The first facility can be counted as the facility corresponding to .

[Modification 1]
Modification 1 of the embodiment will be described below. In the following, mainly the differences with respect to the embodiments will be described.

In Modification 1, the power management server 200 limits control of distributed power sources (for example, the power storage device 320) based on whether the deviation between the planned value and the actual value is equal to or less than a threshold before the start of the predetermined period. determine whether or not to

The limit on the control of the distributed power sources may be a limit on the magnitude of the regulated power with respect to the demand power that is regulated by the control of the distributed power sources. The level of restriction may vary depending on the magnitude of the divergence. For example, the restriction level may be determined such that the greater the divergence, the smaller the magnitude of the adjustment power.

In such a case, the following options are conceivable as deviations.

In the first option, the divergence may be the divergence between the planned value for demand power and the actual value for demand power. The power management server 200 does not limit the control of the distributed power sources of the third facility for a predetermined period of time, for which the deviation between the planned value for power demand and the actual value for power demand is equal to or less than a threshold before a predetermined period of time. may On the other hand, the power management server 200 controls the distributed power sources of the fourth facility for a predetermined period of time for the fourth facility where the difference between the planned power demand value and the actual power demand value before the predetermined period is larger than the threshold. may be restricted.

The power demand is affected by the power consumption of the facility 300, by the output power of the distributed power sources (eg, the solar cell device 310), and by the control of the distributed power sources (eg, the power storage device 320).

For example, the planned value for demand power may be a target value for demand power targeted in the control of distributed power sources. Therefore, the divergence may be the divergence between the actual value and the target value of the power demand achieved by controlling the distributed power sources. The divergence may be represented by an absolute value (deviation value) of the difference between the actual value and the planned value, or may be represented by a ratio (deviation rate) of the difference between the actual value and the planned value. The divergence may be the mean value of the divergence value or the divergence rate in the observation period before the start of the predetermined period.

In the first option, the third facility is the facility that is controlled for a given period of time and is included in the second facility described above. Similarly, the fourth facility is a facility that is controlled for a predetermined period of time and is included in the above-described second facility.

In the second option, the divergence may be the divergence between the planned value for controlling the distributed power sources and the actual value for controlling the distributed power sources. The power management server 200 restricts the control of the first distributed power sources for a predetermined period of time for which the deviation between the planned value for controlling the distributed power sources and the actual value for controlling the distributed power sources is equal to or less than a threshold before a predetermined period of time. You don't have to. The power management server 200 restricts the control of the second distributed power sources for a predetermined period of time, with respect to the second distributed power sources in which the difference between the planned value for the control of the distributed power sources and the actual value for the control of the distributed power sources before the predetermined period of time is greater than a threshold. You may

For example, the planned value for controlling distributed power sources may be a target value for controlling distributed power sources. Therefore, the divergence may be the divergence between the actual value and the target value of the control of the distributed power sources. The divergence may be represented by an absolute value (deviation value) of the difference between the actual value and the planned value, or may be represented by a ratio (deviation rate) of the difference between the actual value and the planned value. The divergence may be the mean value of the divergence value or the divergence rate in the observation period before the start of the predetermined period.

In the second option, the first distributed power source is a distributed power source that can be controlled in a predetermined period of time, and is the distributed power source that the second facility described above has. The second distributed power source is a distributed power source that can be controlled in a predetermined period, and is a distributed power source that the above-described second facility has.

A third option may combine the first and second options. For example, in the third option, the control of the second distributed power sources whose deviation regarding the second option is greater than the second threshold may be restricted for the fourth facility where the deviation regarding the first option is greater than the first threshold.

The first threshold used in the third option may be different than the threshold used in the first option. The second threshold used in the third option may be different than the threshold used in the second option. The second threshold may be changed according to the degree of divergence with respect to the first option. For example, the greater the divergence regarding the first option, the greater the value set as the second threshold. According to such a configuration, in the fourth facility where the deviation between the planned value and the actual value of the demand power is large, the control of the distributed power supply is less likely to be restricted, so the factor of the large deviation between the planned value and the actual value of the demand power is eliminated. easier to analyze.

(Power management method)
The power management method is described below. Here, a case in which the predetermined period is the DR period is exemplified.

As shown in FIG. 7 , in step S<b>30 , the power management server 200 transmits to each facility 300 a control instruction for the distributed power sources of each facility 300 .

In step S<b>31 , the power management server 200 receives performance information from each facility 300 . The performance information may include performance values related to power demand, and may include performance values related to control of distributed power sources.

At step S10, the power management server 200 receives the request message. The request message may be received from power company 400 .

In step S40A, power management server 200 receives a demand message from facility 300A during the DR period, and in step S40B, power management server 200 receives a demand message from facility 300B during the DR period. On the other hand, in step S40C, the power management server 200 cannot receive demand messages from the facility 300C during the DR period.

In FIG. 7, facility 300A and facility 300B are examples of the second facility, and facility 300C is an example of the first facility.

In step S41, the power management server 200 assumes specific behavior of the facility 300C based on the power demand plan received from the facility 300C.

In step S42, the power management server 200 limits control of distributed power sources (for example, the power storage device 320) based on whether the deviation between the planned value and the actual value is equal to or less than a threshold value before the start of the predetermined period. Determine whether or not As described in Option 1 to Option 3, the deviation may be related to demand power, may be related to control of distributed power sources, or may be a combination thereof.

Here, a case is exemplified in which the control of the distributed power sources is restricted for the facility 300B without restricting the control of the distributed power sources for the facility 300A. Facility 300A is an example of a third facility, and facility 300B is an example of a fourth facility. The distributed power sources of the facility 300A are an example of a first distributed power source, and the distributed power sources of the facility 300B are an example of a second distributed power source.

In step S43, the power management server 200 determines the content of the control instruction based on the demand message, assuming that the power demand of the facility 300C is adjusted by a specific behavior. Furthermore, the power management server 200 determines the content of the control instruction based on whether or not to limit the control of the distribution declaration.

In step S44A, the power management server 200 transmits to the facility 300A a control instruction including control details that do not limit the control of the distributed power sources. In step S44B, the power management server 200 transmits to the facility 300B a control instruction including details of control that restricts the control of the distributed power sources. The facility 300C regulates the power demand of the facility 300C by controlling the distributed power sources based on specific behaviors.

Although omitted in FIG. 7 for simplification of explanation, the processes of steps S40A to S40C, steps S41, S42, S43, and steps S44A to S44B may be repeated during the DR period. In such cases, control instructions may be sent to facility 300C when demand messages can be received from facility 300C. Whether or not to limit the control of the distributed power sources of the facility 300C is determined based on whether or not the deviation between the planned value and the actual value is equal to or less than a threshold value before the start of the predetermined period.

(Action and effect)
In Modification 1, the power management server 200 limits control of distributed power sources (for example, power storage device 320) when the deviation between the planned value and the actual value is greater than a threshold before the start of the predetermined period. According to such a configuration, the distributed power supply or the second distributed power supply of the fourth facility where the difference between the planned value and the actual value is larger than the threshold does not follow the control instruction. It is possible to reduce the risk that the balance adjustment will not be carried out as planned.

[Other embodiments]
Although the present invention has been described by the above-described embodiments, the statements and drawings forming part of this disclosure should not be construed as limiting the present invention. Various alternative embodiments, implementations and operational techniques will become apparent to those skilled in the art from this disclosure.

In the disclosure above, the power management server 200 may assume certain behaviors based on the plan for the power demand of the first facility. In such cases, a plan for the power demand of the first facility may be identified using a predictive model generated by learning the power demand of the first facility. Note that the specific behavior may be considered behavior that is identified using a predictive model.

In the disclosure described above, the power management server 200 may assume a specific behavior based on the control details instructed before the start of the predetermined period for the distributed power sources of the first facility. In such a case, the content of control may be determined based on the prediction result of the power demand of the first facility. The predicted power demand of the first facility may be identified using a prediction model generated by learning the power demand of the first facility. Note that the specific behavior may be considered behavior that is identified using a predictive model.

In these cases, the forecast model may be generated by learning the power demand performance information and learning parameters that affect the power demand. The learning parameters may include at least a parameter specifying time. Learning parameters may include parameters specifying the day of the week, month, season, weather, temperature, humidity, and the like. The prediction model may be generated by learning the performance information of the generated power of the solar cell device 310 and learning parameters that affect the generated power. The learning parameters may include parameters specifying the weather, temperature, humidity, amount of solar radiation, etc. that affect the power generated by the solar cell device 310 .

In the above disclosure, the power storage device 320 is mainly illustrated as a distributed power source (adjusted power source) controlled by the power management server 200 . However, the above disclosure is not so limited. A distributed power source controlled by the power management server 200 may include a fuel cell device 330 .

In the above disclosure, the solar cell device 310 was exemplified as a distributed power supply that allows reverse power flow. However, the above disclosure is not so limited. Distributed power sources that allow reverse power flow may include distributed power sources that output power using renewable energy. Such distributed power sources may include one or more distributed power sources selected from among wind power plants, hydro power plants, geothermal power plants and biomass power plants. A reverse power flow of the discharged power of the power storage device 320 may be allowed, and a reverse power flow of the output power of the fuel cell device 330 may be allowed.

Although not specifically mentioned in the above disclosure, power storage device 320 may include a stationary power storage device or may include a power storage device mounted on an electric vehicle.

The above disclosure exemplifies the case where the local control device 360 is provided in the facility 300 . However, the above disclosure is not so limited. Local controller 360 may be provided by a cloud service implemented by a server or the like provided on network 120 .

Although not specifically mentioned in the disclosure above, the power may be an instantaneous value (kW) or an integrated value (kWh) per unit time.

DESCRIPTION OF SYMBOLS 100... Power management system, 110... Power system, 120... Network, 200... Power management server, 210... Management part, 220... Communication part, 230... Control part, 300... Facility, 310... Solar battery device, 320... Power storage device , 330... Fuel cell device, 340... Load device, 360... Local control device, 361... First communication unit, 362... Second communication unit, 363... Control unit, 380... Power meter, 390... Power meter, 392... Power total, 393... power meter, 400... electric power company

Claims (7)

a management unit that manages two or more facilities having distributed power sources connected to a power system;
a receiving unit configured to receive, from each of the two or more facilities, a demand message including an information element indicating the power demand of each of the two or more facilities during a predetermined period of time during which the supply and demand balance of the power system is adjusted;
a transmission unit configured to transmit a control instruction to control the distributed power sources of a second facility capable of receiving the demand message while excluding the first facility unable to receive the demand message during the predetermined period of time;
and a control unit that determines the content of the control instruction based on the demand message on the assumption that the power demand of the first facility is adjusted with a specific behavior. The power management apparatus according to claim 1, wherein said control unit assumes said specific behavior based on a power demand plan of said first facility. 2. The power management apparatus according to claim 1, wherein said control unit assumes said specific behavior based on control details instructed before the start of said predetermined period for said distributed power supply of said first facility. The control unit
For a third facility in which the difference between the planned value for the power demand and the actual value for the power demand before the predetermined period of time is equal to or less than a threshold, without restricting the control of the distributed power sources of the third facility for the predetermined period of time,
Limiting control of the distributed power sources of the fourth facility during the predetermined period of time for the fourth facility where the deviation between the planned value of the demanded power and the actual value of the demanded power before the predetermined period of time is greater than a threshold. The power management device according to any one of claims 1 to 3. The control unit
For a first distributed power source for which a deviation between a planned value for control of the distributed power source and an actual value for control of the distributed power source before the predetermined period of time is equal to or less than a threshold, the control of the first distributed power source is restricted during the predetermined period of time. figure,
Limiting the control of the second distributed power source during the predetermined period for a second distributed power source in which the difference between the planned value regarding the control of the distributed power source and the actual value regarding the control of the dispersed power source before the predetermined period is greater than a threshold. 4. The power management device according to any one of claims 1 to 3. a management unit that manages two or more facilities having distributed power sources connected to a power system;
a receiving unit configured to receive, from each of the two or more facilities, a demand message including an information element indicating the power demand of each of the two or more facilities during a predetermined period of time during which the supply and demand balance of the power system is adjusted;
a transmission unit configured to transmit a control instruction to control the distributed power sources of a second facility capable of receiving the demand message while excluding the first facility unable to receive the demand message during the predetermined period of time;
a control unit that determines the content of the control instruction based on the demand message on the assumption that the power demand of the first facility is adjusted with a specific behavior. managing two or more facilities having distributed power sources connected to a power grid;
receiving, from each of the two or more facilities, a demand message including an information element indicating the power demand of each of the two or more facilities during a predetermined period of time for adjusting the supply and demand balance of the power system;
transmitting a control instruction to control the distributed power sources of a second facility that can receive the demand message, excluding the first facility that cannot receive the demand message during the predetermined period;
determining the content of the control instruction based on the demand message, assuming that the demand power of the first facility is adjusted with a specific behavior.

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