JP2020089147A - Power management server and power management method - Google Patents

Abstract

To provide a power management server and a power management method that can improve the accuracy in controlling a charged power in a storage battery device using a surplus power.SOLUTION: A power management server comprises a control unit that selects, from two or more facilities having a distributed power supply and a storage battery device, candidates for a first facility to which predetermined control is to be applied. The predetermined control is control of controlling a charged power of the storage battery device using a surplus power of the distributed power supply. The control unit excludes, from the candidates for the first facility, facilities having the amount of controllable charged power is smaller than a threshold.SELECTED DRAWING: Figure 3

Description

The present invention relates to a power management server and a power management method.

2. Description of the Related Art In recent years, a technique for suppressing the amount of power flow from a power system to a facility is known in order to maintain a balance between power supply and demand of the power system. A technique of using a storage battery device provided in a facility in order to maintain the power supply and demand balance of a power system has also been proposed (for example, Patent Documents 1 and 2).

International Publication No. 2015/041010 Pamphlet International Publication No. 2016/084396 Pamphlet

By the way, regarding a facility having a solar battery device and a storage battery device, the storage battery device is charged using the output power of the solar battery device at a time when power can be output from the solar battery device (for example, in the daytime), and the solar battery device is also used. Therefore, it is conceivable to perform the operation of discharging the storage battery device during a time when power cannot be output (for example, at night). For example, it is assumed that such operation is performed when the fixed price purchase system (FIT; Feed-in Tariff) for purchasing the power output from the solar cell device at a fixed price is abolished.

In such a case, it is possible to maintain the supply and demand balance of the power system by suppressing the charging power of the storage battery device using the surplus power of the solar cell device.

However, since the storage battery device is charged using the surplus power of the solar battery device, an error may occur due to variations in output power and power consumption.

Therefore, the present invention has been made to solve the above-described problems, and provides a power management server and a power management method that can improve the accuracy of suppression of charging power of a storage battery device using surplus power. The purpose is to provide.

The power management server according to the first feature includes a control unit that selects a candidate for the first facility to which the predetermined control should be applied from two or more facilities having the distributed power source and the storage battery device. The predetermined control is control that suppresses charging power of the storage battery device using surplus power of the distributed power source. The control unit excludes, from the candidates for the first facility, a facility whose chargeable power suppression amount is smaller than a threshold value.

The power management method according to the second feature includes Step A of selecting a candidate for the first facility to which the predetermined control is to be applied, from two or more facilities having a distributed power source and a storage battery device. The predetermined control is control that suppresses charging power of the storage battery device using surplus power of the distributed power source. The step A includes a step of excluding, from the candidates for the first facility, a facility whose chargeable power suppression amount is smaller than a threshold value.

According to one aspect, it is possible to provide a power management server and a power management method that can improve the accuracy of suppressing charging power of a storage battery device using surplus power.

FIG. 1 is a diagram showing a power management system 100 according to the embodiment. FIG. 2 is a diagram showing a facility 300 according to the embodiment. FIG. 3 is a diagram showing the power management server 200 according to the embodiment. FIG. 4 is a diagram showing the local control device 360 according to the embodiment. FIG. 5 is a diagram for explaining the down DR control in the embodiment. FIG. 6 is a diagram for explaining the down DR control in the embodiment. FIG. 7 is a diagram showing a power management method according to the embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are designated by the same or similar reference numerals.

However, it should be noted that the drawings are schematic and the ratio of each dimension may be different from the actual one. Therefore, specific dimensions should be determined in consideration of the following description. Moreover, it is needless to say that the drawings may include portions having different dimensional relationships or ratios.

[Embodiment]
(Power management system)
The power management system according to the embodiment will be described below.

As illustrated in FIG. 1, the power management system 100 includes a power management server 200, a facility 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 electric power system 110. Hereinafter, the flow of power from the power system 110 to the facility 300 will be referred to as a tidal current, and the flow of power from the facility 300 to the power system 110 will be referred to as a reverse power flow.

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

The power management server 200 is a server managed by a power business operator such as a power generation business, a power transmission/distribution business or a retail business, and a resource aggregator. The resource aggregator is a power provider that provides reverse flow power to a power generation provider, a power transmission and distribution provider, a retailer, and the like in VPP (Virtual Power Plant). The resource aggregator may be an electric power company that produces surplus power (negative power) by reducing the power consumption of the facility 300 managed by the resource aggregator. Such surplus power may be regarded as generated power. The resource aggregator may be a power provider that maintains a power supply and demand balance of the power grid 110 by suppressing or increasing the power consumption of the facility 300 managed by the resource aggregator (for example, suppressing or increasing the charging power of the storage battery device). Good. In the embodiment, the power management server 200 is an example of a reverse flow power purchase entity. The power management server 200 is an example of a power management server.

The power management server 200 instructs the local control device 360 provided in the facility 300 to control the distributed power sources (for example, the solar cell device 310, the storage battery 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 send a reverse power flow control message requesting control of reverse power flow. Furthermore, the power management server 200 may send a power control message that controls the operating state of the distributed power sources. The degree of control of the tidal current or the reverse tidal current may be represented by an absolute value (for example, XX kW) or a relative value (for example, XX%). Alternatively, the degree of control of the tidal current or the reverse tidal current may be represented by two or more levels. The degree of control of the tidal current or the reverse power flow may be represented by a power rate (RTP; Real Time Pricing) determined by the current power supply and demand balance, or a power rate determined by the past power supply and demand balance (TOU; Time Of Use). May be represented by

As shown in FIG. 2, the facility 300 includes a solar cell device 310, a storage battery device 320, a fuel cell device 330, a load device 340, a local control device 360, and a power meter 380.

The solar cell device 310 is a distributed power source that generates power according to light such as sunlight. The solar cell device 310 is an example of a specific distributed power source to which a predetermined purchase price is applied. For example, the solar cell device 310 includes a PCS (Power Conditioning System) and a solar panel.

The storage battery device 320 is a distributed power source that charges electric power and discharges electric power. The storage battery device 320 is an example of a distributed power source to which a predetermined purchase price is not applied. For example, the storage battery device 320 includes a PCS and a storage battery cell.

The fuel cell device 330 is a distributed power source that generates electricity using fuel. The fuel cell device 330 is an example of a distributed power supply to which a predetermined purchase price is not applied, and is a distributed power supply having a rated operation mode that outputs rated power. For example, the fuel cell device 330 includes a PCS and a fuel cell.

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

In the embodiment, the solar cell device 310, the storage battery device 320, and the fuel cell device 330 may be power sources used for VPP.

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 storage battery device 320 provided in the facility 300, and may operate the operating state of the fuel cell device 330 provided in the facility 300. May be controlled. Details of the local control device 360 will be described later (see FIG. 4).

In the embodiment, the communication between the power management server 200 and the local control device 360 is performed according to the first protocol. On the other hand, communication between the local control device 360 and the distributed power source (solar cell device 310, storage battery device 320 or fuel cell device 330) is performed according to a second protocol different from the first protocol. For example, as the first protocol, a protocol based on Open ADR (Automated Demand Response) or an original dedicated protocol can be used. For example, as the second protocol, a protocol conforming to ECHONET Lite, SEP (Smart Energy Profile) 2.0, KNX, or an original dedicated protocol can be used. It should be noted that the first protocol and the second protocol may be different, and for example, both may be unique dedicated protocols as long as they are protocols created according to different rules.

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

Here, the power meter 380 transmits to the local control device 360 a message including an information element indicating a measurement result (amount of tidal current or reverse tidal current (Wh)) for each unit time (for example, 30 minutes). .. The power meter 380 may send a message autonomously, or may send a message in response to a request from the local control device 360.

The electric power company 400 is an entity that provides infrastructure such as the electric power system 110, and is, for example, an electric power company such as a power generation company or a power transmission and distribution company. The electric power company 400 may entrust various operations to an entity that manages the electric power management server 200.

(Power management server)
The power management server according to the embodiment will be described below. As illustrated in FIG. 3, the power management server 200 includes a management unit 210, a communication unit 220, and a control unit 230. The power management server 200 is an example of a VTN (Virtual Top Node).

The management unit 210 is configured by a storage medium such as a non-volatile memory or/and an HDD, and manages data regarding the facility 300 managed by the power management server 200. The facility 300 managed by the power management server 200 may be a facility 300 having a contract with an entity that manages the power management server 200. For example, the data regarding the facility 300 may be the demand power supplied from the power system 110 to the facility 300, and is reduced at each facility 300 in response to a reduction request (DR; Demand Response) of the demand power of the entire power system 110. It may be the generated power. The data on the facility 300 includes the type of distributed power source (solar cell device 310, storage battery device 320 or fuel cell device 330) installed in the facility 300, and distributed power source (solar cell device 310, storage battery device 320 or fuel cell) installed in the facility 300. It may be the specifications of the device 330). The specifications may be the rated generated power (W) of the solar cell device 310, the maximum output power (W) of the storage battery device 320, and the maximum output power (W) of the fuel cell device 330. Further, the data regarding the facility 300 may be the output power (Wh) instructed to the distributed power sources in the past. For example, when the distributed power source is the storage battery device 320, the data regarding the facility 300 may be the discharge power (Wh) instructed to the storage battery device 320. The data regarding the facility 300 may be the degree of deterioration of the distributed power source. For example, when the distributed power source is the storage battery device 320, the data regarding the facility 300 may be SOH (State Of Health) of the storage battery device 320.

The communication unit 220 includes a communication module. The communication module may be a communication module that can be connected to a WAN (Wide Area Network) such as the Internet, LTE, or an optical communication line. The communication module may be a wired communication module that complies with a standard such as IEEE802.3. The communication module may be a wireless communication module that complies with standards such as IEEE 802.11a/b/g/n, ZigBee, and Wi-SUN. The communication unit 220 communicates with the local control device 360 via the network 120. The communication unit 220 communicates according to the first protocol, as described above. For example, the communication unit 220 transmits the first message to the local control device 360 according to the first protocol. The communication unit 220 receives the first message response from the local control device 360 according to the first protocol.

In the embodiment, the communication unit 220 receives, from the facility 300 (for example, the local control device 360 or the power meter 380), a message including an information element indicating the demand power supplied from the power grid 110 to the facility 300. The power demand may be a value measured by the power meter 380 described above. The power demand may be a value obtained by subtracting the output power of the distributed power sources (solar cell device 310, storage battery device 320, fuel cell device 330) from the power consumption of the load device 340.

The control unit 230 may include at least one processor. According to various embodiments, at least one processor may be implemented as a single integrated circuit (IC), or multiple communicatively connected integrated circuits ICs and/or discrete circuits. ). The control unit 230 controls each component provided in the power management server 200. For example, the control unit 230 controls the local control device 360 provided in the facility 300 by controlling the distributed power sources (the solar cell device 310, the storage battery device 320, or the fuel cell device 330) provided in the facility 300 by transmitting the control message. Instruct. As described above, the control message may be a power flow control message, a reverse power flow control message, or a power supply control message.

(Local control device)
The local control device according to the embodiment will be described below. As shown in FIG. 4, the local control device 360 includes a first communication unit 361, a second communication unit 362, and a control unit 363. The local control device 360 is an example of a VEN (Virtual End Node).

The first communication unit 361 is composed of a communication module. The communication module may be a communication module that can be connected to a WAN (Wide Area Network) such as the Internet, LTE, or an optical communication line. The communication module may be a wired communication module that complies with a standard such as IEEE802.3. The communication module may be a wireless communication module that complies with standards such as IEEE 802.11a/b/g/n, ZigBee, and Wi-SUN. The first communication unit 361 communicates with the power management server 200 via the network 120. The first communication unit 361 communicates according to the first protocol, as described above. 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 composed of a communication module. The communication module may be a wireless communication module complying with standards such as IEEE 802.11a/b/g/n, ZigBee, Wi-SUN, or a wired communication module complying with standards such as IEEE 802.3. Good. The second communication unit 362 communicates with the distributed power source (solar cell device 310, storage battery device 320 or fuel cell device 330). The second communication unit 362 communicates according to the second protocol, as described above. For example, the second communication unit 362 transmits the second message to the distributed power source according to the second protocol. The second communication unit 362 receives the second message response from the distributed power source according to the second protocol.

The control unit 363 may include at least one processor. According to various embodiments, at least one processor may be implemented as a single integrated circuit (IC), or multiple communicatively connected integrated circuits ICs 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 device to set the operating state of the distributed power source by transmitting the second message and receiving the second message response. The control unit 363 may instruct the distributed power sources to report information on the distributed power sources by transmitting the second message and receiving the second message response in order to manage the power of the facility 300.

(Applicable scene)
The application scenes of the embodiment will be described below. A case will be described in which the power management server 200 receives a demand reduction request (hereinafter, DR request) of the power system 110 from the power company 400, which is a higher node of the power management server 200. Here, a case will be mainly described in which the DR request is performed for the demand response period in which the electric power of the electric power system 110 is insufficient in the first time zone (for example, daytime) in which the electric power can be output from the solar cell device 310.

In such a case, the power management server 200 may reduce the power corresponding to the contracted power as a whole of the facility 300 managed by the power management server 200 from the baseline power. In the embodiment, the electric power is reduced from the baseline electric power by the predetermined control (hereinafter, the DR reduction control) that suppresses the charging electric power of the storage battery device 320 using the surplus electric power of the solar cell device 310.

The surplus power of the solar cell device 310 is the power obtained by subtracting the power consumption of the facility 300 from the output power of the solar cell device 310. For example, the power consumption of the facility 300 may be the power consumption of the load device 340. Alternatively, when the fuel cell device 330 is provided, the power consumption of the facility 300 may be the power obtained by subtracting the output power of the fuel cell device 330 from the power consumption of the load device 340.

The contracted power may be the power determined between the power management server 200 and the power company 400 in the negawatt transaction. Baseline power is the power demand that would be expected if no reduction request was made. The baseline electric power may be an average value of the electric power demand for a certain period before the notification of activation of the reduction request. The certain period may be set according to the substance of the negawatt transaction, or may be set between the power management server 200 and the power company 400.

In FIG. 5 and FIG. 6, the meaning of each symbol is as follows. (A) shows the amount of electric power (tidal current amount) supplied from the electric power system to the facility 300, and (b) shows the amount of electric power charged to the storage battery device 320 using the surplus electric power of the solar battery device 310. (C) shows the reverse flow rate using the surplus power of the solar cell device 310, and (d) shows the power consumption of the facility 300 covered by the output power of the solar cell device. , (E) show the amount of electric power discharged from the storage battery device 320, (f) show the amount of electric power demanded from the facility 300, and (g) show the remaining amount of electricity stored in the storage battery device 320. .. The units of (a) to (f) are represented by electric energy (kWh) for 30 minutes, and the unit of (g) is represented by BT remaining amount (kWh).

First, a case where the DR request is not made will be described with reference to FIG. In such a case, the down DR control is not performed. As shown in FIG. 5, the output power of the solar cell device 310 covers the power consumption of the facility 300 and is used to charge the storage battery device 320. Furthermore, when the output power amount of the solar cell device 310 is larger than the power consumption amount of the facility 300 and the charging power amount of the storage battery device 320, reverse power flow using the surplus power of the solar cell device 310 is performed. The reverse flow rate is the power obtained by subtracting the power consumption of the facility 300 and the charging power of the storage battery device 320 from the output power of the solar cell device 310.

Secondly, a case where the DR request is performed will be described with reference to FIG. In such a case, the down DR control is performed. For example, the lowering DR control is performed between about 9:00 and 12:00. As shown in FIG. 6, as compared with FIG. 5, the charging power amount of the storage battery device 320 using the surplus power of the solar cell device 310 is suppressed between about 9:00 and 12:00. Therefore, as shown in FIG. 6, as compared with FIG. 5, the amount of increase in the remaining charge amount of the storage battery device 320 decreases between about 9:00 and 12:00.

Under such a background, the power management server 200 (the control unit 230) selects a candidate for the first facility to which the down DR control should be applied, from two or more facilities having the solar cell device 310 and the storage battery device 320. To do. Here, the power management server 200 excludes, from the candidates for the first facility, a facility whose chargeable power suppression amount (hereinafter, DR possible amount) is smaller than a threshold value. The power management server 200 selects the first facility from the candidates for the first facility for the demand response period of the first time zone.

The facility 300 selected as the first facility from the candidates for the first facility performs the DR reduction control in the demand response period of the first time zone. The facility 300 selected as the first facility charges the storage battery device 320 using the surplus power of the solar cell device 310 without performing the DR reduction control during the period other than the demand response. The facility 300 that has not been selected as the first facility from the candidates for the first facility charges the storage battery device 320 using the surplus power of the solar cell device 310 without performing the DR reduction control.

The facility 300 (second facility) excluded from the candidates for the first facility charges the storage battery device 320 using the surplus power of the solar cell device 310 without performing the DR reduction control. The second facility reduces the demand power of the facility 300 during a second time period (for example, at night) when power cannot be output from the solar cell device 310, targeting a demand response period when the power of the power system 110 is insufficient. May be.

The facility 300 that is not selected as the first facility from the candidates for the first facility may be considered to be the same as the second facility described above.

In the embodiment, the power management server 200 may exclude, from the candidates for the first facility, the facility 300 in which the prediction accuracy of the chargeable power suppression amount (that is, the DR possible amount) is lower than the predetermined accuracy. The prediction accuracy of the DR possible amount is determined based on at least one of the prediction accuracy of the output power of the solar cell device 310, the prediction accuracy of the power consumption of the facility 300, and the prediction accuracy of the remaining power storage amount of the storage battery device 320. For example, the prediction accuracy of the output power of the solar cell device 310 may be determined based on the reliability of the solar radiation amount information (including the weather forecast) acquired from an external server or the like. The prediction accuracy of the power consumption of the facility 300 may be set based on the degree of change in the past power consumption. The prediction accuracy of the remaining charge of the storage battery device 320 may be determined based on the reliability of the solar radiation amount information and the degree of change in the past power consumption.

In such a case, the power management server 200 may select, as the first facility, a facility whose DR prediction amount is smaller than the threshold value and whose prediction accuracy is higher than the predetermined accuracy. For example, the power management server 200 may additionally select, as the first facility, a facility whose prediction accuracy is higher than a predetermined accuracy when the secured power is smaller than the contracted power. For example, the secured power may be the total DR possible amount of the first facility, or a value obtained by subtracting the offset from the total DR possible amount of the first facility, or the DR possible amount of the first facility. It may be a value obtained by adding an offset to the sum of the above.

In the embodiment, the two or more facilities 300 may be facilities controlled based on a message transmitted from the power management server 200 based on feedback information transmitted to the power management server 200. The feedback information may be information indicating the suppression status of the charging power of the storage battery device 320 using the surplus power of the solar cell device 310. For example, the feedback information may be information indicating an error in the actual value of the possible DR amount reduction with respect to the predicted value of the possible DR amount decrease. The message may be a message instructing to increase or decrease the charging power of the storage battery device 320. For example, the transmission of the feedback information and the message may be repeated in a predetermined cycle (for example, 1 minute).

The power management server 200 may exclude, from the candidates for the first facility, a facility whose control error using the message is larger than a predetermined error. The control error may be determined based on the time until the control using the message is reflected. For example, the control error may be determined based on the delay time of a message that occurs in the network between the facility 300 and the power management server 200, or may be determined based on the processing speed of the local control device 360 of the facility 300. Good. The control error may be determined based on the past control error using the message.

In such a case, the power management server 200 may select, as the first facility, a facility whose DR available amount is smaller than the threshold value or whose control error is smaller than a predetermined error. For example, the power management server 200 may additionally select a facility having a control error smaller than a predetermined error as the first facility when the secured power is smaller than the contracted power.

(Power management method)
The power management method according to the embodiment will be described below.

As shown in FIG. 7, in step S10, the power management server 200 specifies the DR possible amount for two or more facilities 300. The DR possible amount calculated in step S10 is based on at least one of the prediction accuracy of the output power of the solar cell device 310, the prediction accuracy of the power consumption of the facility 300, and the prediction accuracy of the remaining power storage amount of the storage battery device 320. It is a predicted value that is set.

In step S11, the power management server 200 identifies the control error using the message.

In step S12, the power management server 200 selects a candidate for the first facility to which the reduced DR control should be applied. The power management server 200 excludes, from the candidates for the first facility, the facility whose DR available amount is smaller than the threshold value. The power management server 200 may exclude, from the candidates for the first facility, the facility 300 whose prediction accuracy of the DR possible amount is lower than the predetermined accuracy. The power management server 200 may exclude, from the candidates for the first facility, a facility whose control error using the message is larger than a predetermined error.

In step S13, the power management server 200 receives a notice of activation of the reduction request (DR notice). For example, the DR notice is issued by the electric power company 400. Here, a case where the DR notice is issued for the demand response period of the first time zone is illustrated.

In step S14, the power management server 200 selects the first facility from the candidates for the first facility for the demand response period of the first time zone.

In step S15, the power management server 200 determines whether the secured power is larger than the contracted power. The power management server 200 performs the process of step S17 when the determination result is YES. The power management server 200 performs the process of step S16 when the determination result is NO.

For example, the secured power may be the total DR possible amount of the first facility, or a value obtained by subtracting the offset from the total DR possible amount of the first facility, or the DR possible amount of the first facility. It may be a value obtained by adding an offset to the sum of the above.

Here, the power management server 200 may repeat the processes of step S14 and step S15 until the secured power exceeds the contracted power. In such a case, the power management server 200 may select the first facility from the candidates for the first facility in ascending order of the DR possible amount. The power management server 200 may select the first facility from the candidates for the first facility in the order in which the DR accuracy prediction accuracy is good. The power management server 200 may select the first facility from the candidates for the first facility in ascending order of control error using the message.

In step S16, the power management server 200 additionally selects the first facility from the facilities 300 excluded from the first facility candidates. The power management server 200 may additionally select, as the first facility, a facility whose prediction accuracy is higher than a predetermined accuracy. The power management server 200 may additionally select a facility having a control error smaller than a predetermined error as the first facility.

In step S17, the power management server 200 performs the down DR control for the first facility. For example, the power management server 200 transmits, to the facility 300, a message instructing to increase or decrease the charging power of the storage battery device 320, based on the feedback information received from the facility 300.

(Action and effect)
In the embodiment, the power management server 200 excludes the facility 300 having a small DR possible amount from the first facility to which the downdraft DR control should be applied. According to such a configuration, the facility 300 that causes an error in the down DR control is excluded from the first facility although the contribution to the down DR control is small. Therefore, the accuracy of suppressing the charging power of the storage battery device 320 using the surplus power of the solar cell device 310 can be improved.

[Other Embodiments]
Although the present invention has been described by the above-described embodiments, it should not be understood that the description and drawings forming a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operation techniques will be apparent to those skilled in the art.

In the embodiment, the facility 300 including the solar cell device 310 and the storage battery device 320 is mainly described. However, the embodiment is not limited to this. The facility 300 managed by the power management server 200 may include the facility 300 having the storage battery device without the solar cell device 310. In such a case, the facility 300 that does not have the solar cell device 310 but has the storage battery device sets the target value of the purchased electric power purchased by the facility 300 from the electric power supplier during the demand response period, and purchases the purchased electric power. The storage battery device 320 may be discharged so that is the target value.

In the embodiment, the case where the facility 300 has the fuel cell device 330 is illustrated. However, the embodiment is not limited to this. The facility 300 may not have the fuel cell device 330.

In the embodiment, the solar cell device 310 is illustrated as the distributed power source. However, the embodiment is not limited to this. The distributed power source may be the fuel cell device 330.

In the embodiment, the down DR control for transmitting the message based on the feedback information has been illustrated. However, the embodiment is not limited to this. The first facility may autonomously perform the DR control by setting the target value in the first facility by the power management server 200.

Although not particularly mentioned in the embodiment, the electric power may be an instantaneous electric power (kW) or an integrated electric energy (kWh) for a certain period (for example, 30 minutes). For example, the power information message may include an information element indicating the instantaneous power (kW) or may include an information element indicating the integrated power amount (kWh).

In the embodiment, the case where the process of selecting the first facility is performed before the start of the demand response period is illustrated. However, the embodiment is not limited to this. The process of selecting the first facility may be performed for the demand response period. Therefore, the process of selecting the first facility may be performed during the demand response period. In such a case, the process of selecting the first facility may be performed based on the absolute amount or the variation amount of real-time demand power during the demand response period. Further, the shortage amount and the excess amount of the reduced power may be calculated in the demand response period, and the process of selecting the first facility may be performed based on the calculated shortage amount and the excess amount.

In the embodiment, the facility 300 not selected as the first facility candidate charges the storage battery device 320 using the surplus power of the solar battery device 310. In such a case, the facility 300 that has not been selected as a candidate for the first facility may perform control to suppress the charging power of the storage battery device 320 using the surplus power of the solar cell device 310. Such control is different from the above-described reduction DR control, and the suppression amount of charging power in such control is smaller than the suppression amount of charging power in the reduction DR control. The facility 300 that is not selected as a candidate for the first facility may not suppress the charging power of the storage battery device 320 that uses the surplus power of the solar cell device 310.

In the embodiment, the facility 300 selected as the first facility candidate charges the storage battery device 320 using the surplus power during the period other than the demand response period. In such a case, the facility 300 selected as the first facility candidate may perform control to suppress the charging power of the storage battery device 320 using the surplus power of the solar cell device 310. Such control is different from the above-described reduction DR control, and the suppression amount of charging power in such control is smaller than the suppression amount of charging power in the reduction DR control. The facility 300 selected as the first facility candidate may not suppress the charging power of the storage battery device 320 using the surplus power of the solar cell device 310 during the period other than the demand response period.

Although not particularly mentioned in the embodiment, the storage battery device 320 may be a storage battery device fixedly connected to the power line provided in the facility 300, or a storage battery device detachably connected to the power line provided in the facility 300. May be As a storage battery device detachably connected to the power line provided in the facility 300, a storage battery device provided in an electric vehicle can be considered.

Although not particularly mentioned in the embodiment, the local control device 360 provided in the facility 300 does not necessarily have to be provided in the facility 300. For example, some of the functions of the local control device 360 may be provided by a cloud server provided on the Internet. That is, it may be considered that the local control device 360 includes a cloud server.

In the embodiment, the case where the first protocol is a protocol compliant with Open ADR 2.0 and the second protocol is a protocol compliant with ECHONET Lite has been illustrated. However, the embodiment is not limited to this. The first protocol may be a protocol standardized as a protocol used for communication between the power management server 200 and the local control device 360. The second protocol may be a protocol standardized as a protocol used in the facility 300.

100... Power management system, 110... Electric power system, 120... Network, 200... Power management server, 210... Management part, 220... Communication part, 230... Control part, 300... Facility, 310... Solar cell device, 320... Storage battery 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, 400... Power company

Claims (10)

A control unit that selects a candidate for the first facility to which the predetermined control should be applied from two or more facilities having a distributed power source and a storage battery device,
The predetermined control is control for suppressing charging power of the storage battery device using surplus power of the distributed power source,
The power management server, wherein the control unit excludes, from the candidates for the first facility, a facility whose chargeable power suppression amount is smaller than a threshold value. The power management server according to claim 1, wherein the second facility, which is a facility excluded from the candidates for the first facility, charges the storage battery device using the surplus power. The power management server according to claim 1, wherein the distributed power source is a solar cell device. The control unit selects the first facility from the candidates for the first facility for a demand response period when the power of the power system is insufficient in a time period in which power can be output from the solar cell device. The power management server according to claim 3. The power management server according to claim 4, wherein the facility selected as the candidate for the first facility charges the storage battery device using the surplus power during a period other than the demand response period. The power management server according to claim 4 or 5, wherein the control unit excludes, from candidates for the first facility, a facility whose prediction accuracy of the controllable amount of charging power is lower than a predetermined accuracy. The power management server according to claim 6, wherein the control unit selects, as the first facility, a facility whose prediction accuracy is higher than the predetermined accuracy even if the chargeable power suppression amount is smaller than a threshold value. The two or more facilities are facilities controlled based on a message transmitted from the power management server based on feedback information transmitted to the power management server,
The power management server according to claim 4, wherein the control unit excludes a facility having a control error using the message that is greater than a predetermined error from candidates for the first facility. The power management server according to claim 8, wherein the control unit selects, as the first facility, a facility whose control error is smaller than the predetermined error even when the chargeable power suppression amount is smaller than a threshold value. A step A for selecting a candidate for the first facility to which the predetermined control is to be applied, from the two or more facilities having the distributed power source and the storage battery device
The predetermined control is control for suppressing charging power of the storage battery device using surplus power of the distributed power source,
The step A is a power management method including a step of excluding, from the candidates for the first facility, a facility whose chargeable power suppression amount is smaller than a threshold value.

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