JP6975125B2 - Power management server and power management method - Google Patents

Description

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

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

International Publication No. 2015/0410110 Pamphlet International Publication No. 2016/084396 Pamphlet

By the way, in a facility having a solar cell device and a storage battery device, the storage battery device is charged using the output power of the solar cell device during a time when power can be output from the solar cell device (for example, in the daytime), and the solar cell device is charged. It is conceivable to discharge the storage battery device at a time when electric power cannot be output (for example, at night). For example, it is assumed that such an operation will be performed when the feed-in tariff (FIT), which purchases the electric power output from the solar cell device at a fixed price, is abolished.

In such a case, it is conceivable to maintain the supply-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 cell device, an error may occur due to fluctuations in output power and power consumption.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides a power management server and a power management method capable of improving the accuracy of suppressing the charging power of the 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 a predetermined control is applied from two or more facilities having a distributed power source and a storage battery device. The predetermined control is a control for suppressing the charging power of the storage battery device using the surplus power of the distributed power source. The control unit excludes facilities in which the amount of chargeable power that can be suppressed is smaller than the threshold value from the candidates for the first facility.

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

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 the charging power of the storage battery device using the surplus power.

FIG. 1 is a diagram showing a power supply 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 a power management server 200 according to an embodiment. FIG. 4 is a diagram showing a local control device 360 according to an embodiment. FIG. 5 is a diagram for explaining the lowered DR control according to the embodiment. FIG. 6 is a diagram for explaining the lowered DR control according to the embodiment. FIG. 7 is a diagram showing a power management method according to an embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the description of the drawings below, 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 differ from the actual one. Therefore, the specific dimensions should be determined in consideration of the following explanation. In addition, it goes without saying that there may be a portion where the relations or ratios of the dimensions of the drawings are different from each other.

[Embodiment]
(Power management system)
Hereinafter, the power supply management system according to the embodiment will be described.

As shown 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, facility 300A to facility 300C are exemplified as facility 300.

Each facility 300 is connected to the power system 110. In the following, the flow of electric power from the electric power system 110 to the facility 300 is referred to as a power flow, and the flow of electric power from the facility 300 to the electric power system 110 is referred to as 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 electric power management server 200 is a server managed by an electric power company such as a power generation company, a power transmission and distribution company, a retail company, or a resource aggregator. A resource aggregator is an electric power company that provides reverse power flow to a power generation company, a power transmission and distribution company, a retail company, and the like in a VPP (Virtual Power Plant). The resource aggregator may be an electric power company that produces surplus electric power (negawatt) 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 operator that maintains the power supply-demand balance of the power system 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 an embodiment, the power management server 200 is an example of a reverse power flow purchasing 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 source (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 power flow control, or may send a reverse power flow control message requesting reverse power flow control. Further, the power management server 200 may send a power control message for controlling the operating state of the distributed power source. The degree of control of power flow or reverse power flow may be expressed by an absolute value (for example, XX kW) or a relative value (for example, XX%). Alternatively, the degree of control of power flow or reverse power flow may be expressed at two or more levels. The degree of control of power flow or reverse power flow may be expressed by the power charge (RTP; Real Time Pricing) determined by the current power supply and demand balance, and the power charge (TOU; Time Of Use) determined by the past power supply and demand balance. 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 electricity in response 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 is composed of a PCS (Power Conditioning System) and a solar panel.

The storage battery device 320 is a distributed power source that charges 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 is composed of 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 source to which a predetermined purchase price is not applied, and is a distributed power source having a rated operation mode for outputting rated power. For example, the fuel cell device 330 is composed of a PCS and a fuel cell.

For example, the fuel cell device 330 may be a solid oxide fuel cell (SOFC: Solid Oxide Fuel Cell), a solid polymer fuel cell (PEFC: Polymer Electrolite Fuel Cell), or a phosphoric acid. 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 the embodiment, the solar cell device 310, the storage battery device 320, and the fuel cell device 330 may be the power source used for the VPP.

The load device 340 is a device that consumes electric power. For example, the load device 340 is an air conditioning device, 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 electric 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, or 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 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 compliant with Open ADR (Automated Demand Response) or a proprietary dedicated protocol can be used. For example, as the second protocol, an ECHONET Lite-compliant protocol, SEP (Smart Energy Profile) 2.0, KNX, or a proprietary dedicated protocol can be used. It should be noted that the first protocol and the second protocol may be different, for example, even if both are original dedicated protocols, they may be protocols made 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 a message including an information element indicating a measurement result (amount of power flow or reverse power flow (Wh)) in the unit time to the local control device 360 every unit time (for example, 30 minutes). .. The power meter 380 may autonomously transmit a message or may transmit a message in response to a request from the local controller 360.

The electric power company 400 is an entity that provides an infrastructure such as an 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 outsource various operations to the entity that manages the electric power management server 200.

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

The management unit 210 is composed of a non-volatile memory and / and a storage medium such as an HDD, and manages data related to 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 demand reduction request (DR; Demand Response) of the entire power system 110. It may be the power supplied. The data regarding the facility 300 includes the type of the distributed power source (solar battery device 310, storage battery device 320 or fuel cell device 330) provided in the facility 300, and the distributed power source (solar battery device 310, storage battery device 320 or fuel cell) provided in the facility 300. It may be the specifications of the device 330). The specifications may be the rated power generation 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 source 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 about 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 the SOH (State Of Health) of the storage battery device 320.

The communication unit 220 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, and an optical communication line. The communication module may be a wired communication module conforming to a standard such as IEEE802.3. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n, ZigBee, and Wi-SUN. The communication unit 220 communicates with the local control device 360 via the network 120. As described above, the communication unit 220 communicates according to the first protocol. 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 a message from the facility 300 (for example, a local control device 360 or a power meter 380) including an information element indicating the demand power supplied from the power system 110 to the facility 300. The demand power may be a value measured by the above-mentioned power meter 380. The required power 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, the at least one processor may be implemented as a single integrated circuit (IC), or multiple communicably connected integrated circuit ICs and / or discrete circuits. ) May be realized. The control unit 230 controls each configuration provided in the power management server 200. For example, the control unit 230 controls the local control device 360 provided in the facility 300 with respect to the distributed power source (solar cell device 310, storage battery device 320, or fuel cell device 330) provided in the facility 300 by transmitting a control message. To 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 controller)
Hereinafter, the local control device according to the embodiment will be described. As shown in FIG. 4, the local control device 360 has a first communication unit 361, a second communication unit 362, and a control unit 363. The local control device 360 is an example of VEN (Visual 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, and an optical communication line. The communication module may be a wired communication module conforming to a standard such as IEEE802.3. The communication module may be a wireless communication module conforming to standards such as IEEE802.11a / b / g / n, ZigBee, and Wi-SUN. The first communication unit 361 communicates with the power management server 200 via the network 120. 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 composed of a communication module. The communication module may be a wireless communication module conforming to a standard such as IEEE802.11a / b / g / n, ZigBee, Wi-SUN, or a wired communication module conforming to a standard such as IEEE802.3. good. The second communication unit 362 communicates with a distributed power source (solar cell device 310, storage battery device 320, or fuel cell device 330). 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 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, the at least one processor may be implemented as a single integrated circuit (IC), or multiple communicably connected integrated circuit ICs and / or discrete circuits. ) May be realized. The control unit 363 controls each configuration provided in the local control device 360. Specifically, 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 in order to control the electric power of the facility 300. The control unit 363 may instruct the distributed power source to report the information of the distributed power source by transmitting the second message and receiving the second message response in order to manage the power of the facility 300.

(Applicable scene)
Hereinafter, the application scene of the embodiment will be described. A case will be described in which the power management server 200 receives a request for reducing the required power of the power system 110 (hereinafter referred to as a DR request) from the power company 400, which is an upper node of the power management server 200. Here, a case where a DR request is made for a demand response period in which the power of the power system 110 is insufficient in the first time zone (for example, daytime) when the power can be output from the solar cell device 310 will be mainly described.

In such a case, the power management server 200 may reduce the power corresponding to the contract power of the facility 300 managed by the power management server 200 from the baseline power. In the embodiment, power is reduced from the baseline power by a predetermined control (hereinafter referred to as lower DR control) for suppressing the charging power of the storage battery device 320 using the surplus 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 consumption obtained by subtracting the output power of the fuel cell device 330 from the power consumption of the load device 340.

The contracted electric power may be any electric power defined between the electric power management server 200 and the electric power company 400 in the negawatt transaction. Baseline power is the power demand that is expected if a reduction request is not made. The baseline power may be the average value of the power demand for a certain period before the announcement of the activation of the reduction request. The fixed 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 FIGS. 5 and 6, the meaning of each reference numeral is as shown below. (A) shows the electric energy (power flow electric energy) supplied from the electric power system to the facility 300, and (b) shows the charging electric energy of the storage battery device 320 using the surplus electric energy of the solar battery device 310. (C) shows the reverse power flow using the surplus power of the solar battery device 310, and (d) shows the electric energy consumption of the facility 300 covered by the output power of the solar cell device. , (E) show the electric energy discharged from the storage battery device 320, (f) shows the electric energy demanded by the facility 300, and (g) shows the remaining electric energy stored in the storage battery device 320. .. The units of (a) to (f) are represented by the electric energy (kWh) for 30 minutes, and the unit of (g) is represented by the remaining amount of BT (kWh).

First, the case where the DR request is not made will be described with reference to FIG. In such a case, the lower 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 for charging the storage battery device 320. Further, 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 power flow 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.

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

Against this background, the power management server 200 (control unit 230) selects a candidate for the first facility to which the lowered DR control is applied from among two or more facilities having the solar cell device 310 and the storage battery device 320. do. Here, the power management server 200 excludes facilities whose chargeable power can be suppressed (hereinafter, DR possible amount) is smaller than the threshold value from the candidates for the first facility. 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 lowered DR control during 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 lower DR control during the period other than the demand response. The facility 300, which is not 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 lower DR 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 lower DR control. The second facility reduces the power demand of the facility 300 for the demand response period in which the power of the power system 110 is insufficient in the second time zone (for example, at night) when the power cannot be output from the solar cell device 310. You may.

The facility 300 that was 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 the facility 300 whose predictive accuracy of the suppressable amount (that is, the DR possible amount) of the charging power is worse than the predetermined accuracy from the candidates of the first facility. 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 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 determined based on the degree of fluctuation of the power consumption in the past. The accuracy of predicting the remaining amount of electricity stored in the storage battery device 320 may be determined based on the reliability of the solar radiation amount information and the degree of fluctuation in the past power consumption.

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

In the embodiment, the two or more facilities 300 may be a facility controlled based on a message transmitted from the power management server 200 based on the feedback information transmitted to the power management server 200. The feedback information may be any 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 of the actual value of the reduced DR possible amount with respect to the predicted value of the lowered DR possible amount. The message may be a message instructing an increase / decrease in the charging power of the storage battery device 320. For example, the transmission of feedback information and messages may be repeated in a predetermined cycle (eg, 1 minute).

The power management server 200 may exclude a facility whose control error using a message is larger than a predetermined error from the candidates of the first facility. 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 the message generated 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 controller 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 a facility having a control error smaller than a predetermined error as the first facility even if the DR possible amount is smaller than the threshold value. 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 contract power.

(Power management method)
Hereinafter, the power management method according to the embodiment will be described.

As shown in FIG. 7, in step S10, the power management server 200 specifies a 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 storage amount of the storage battery device 320. It is a fixed predicted value.

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

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

In step S13, the power management server 200 receives a notice of activation (DR notice) of the reduction request. For example, the DR notice is issued by the electric power company 400. Here, a case where a 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 or not the secured power is larger than the contract 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, may be a value obtained by subtracting the offset from the total DR possible amount of the first facility, and may be the DR possible amount of the first facility. It may be a value obtained by adding an offset to the total of.

Here, the power management server 200 may repeat the processes of steps S14 and S15 until the secured power exceeds the contract 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 possible DR capacity. The power management server 200 may select the first facility from the candidates for the first facility in the order of the accuracy of predicting the DR possible amount. The power management server 200 may select the first facility from the candidates for the first facility in ascending order of control error using messages.

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

In step S17, the power management server 200 performs lower DR control for the first facility. For example, the power management server 200 transmits a message instructing the increase / decrease of the charging power of the storage battery device 320 to the facility 300 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 lowered DR control is applied. According to such a configuration, the facility 300 that causes an error in the lower DR control is excluded from the first facility even though the contribution to the lower DR control is small. Therefore, it is possible to improve the accuracy of suppressing the charging power of the storage battery device 320 using the surplus power of the solar cell device 310.

[Other embodiments]
Although the invention has been described by embodiments described above, the statements and drawings that form part of this disclosure should not be understood as limiting the invention. This disclosure will reveal to those skilled in the art various alternative embodiments, examples and operational techniques.

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

In the embodiment, the case where the facility 300 has the fuel cell device 330 is illustrated. However, the embodiments are not limited to this. Facility 300 does not have to have the fuel cell device 330.

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

In the embodiment, a lower DR control for transmitting a message based on feedback information has been exemplified. However, the embodiments are not limited to this. By setting the target value in the first facility by the power management server 200, the first facility may autonomously perform the lower DR control.

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 instantaneous power (kW), or may include an information element indicating integrated electric energy (kWh).

In the embodiment, a case where the process of selecting the first facility is performed before the start of the demand response period is illustrated. However, the embodiments are 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, a process of selecting the first facility based on the absolute amount or the fluctuation amount of the real-time demand power in the demand response period may be performed. 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, which is not selected as a candidate for the first facility, charges the storage battery device 320 using the surplus power of the solar cell device 310. In such a case, the facility 300 not 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-mentioned lower DR control, and the amount of suppression of the charging power in such control is smaller than the amount of suppression of the charging power in the lower DR control. The facility 300, which is not selected as a candidate for the first facility, does not have to suppress the charging power of the storage battery device 320 using the surplus power of the solar cell device 310.

In the embodiment, the facility 300 selected as the candidate for the first facility charges the storage battery device 320 using the surplus electric power in a period other than the demand response period. In such a case, the facility 300 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-mentioned lower DR control, and the amount of suppression of the charging power in such control is smaller than the amount of suppression of the charging power in the lower DR control. The facility 300 selected as the candidate for the first facility does not have to suppress the charging power of the storage battery device 320 using the surplus power of the solar cell device 310 during a 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, and may be detachably connected to the power line provided in the facility 300. May be. As the 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 exemplified. However, the embodiments are not limited to this. The first protocol may be any 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 any protocol standardized as the protocol used in the facility 300.

100 ... power management system, 110 ... power system, 120 ... network, 200 ... power management server, 210 ... management unit, 220 ... communication unit, 230 ... control unit, 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 ... Electric power company

Claims (10)

A control unit for selecting a candidate for a first facility to which a predetermined control should be applied from two or more facilities having a distributed power source and a storage battery device is provided.
The predetermined control is a control for suppressing the charging power of the storage battery device using the surplus power of the distributed power source.
The control unit is a power management server that excludes facilities in which the amount of chargeable power that can be suppressed is smaller than the threshold value from the candidates for the first facility. 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 or 2, 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 the demand response period in which the power of the power system is insufficient in the time zone in which the 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 in a period other than the demand response period. The power management server according to claim 4 or 5, wherein the control unit excludes a facility whose predictable accuracy of the suppressable amount of charging power is worse than a predetermined accuracy from the candidates of the first facility. The power management server according to claim 6, wherein the control unit selects a facility whose prediction accuracy is better than the predetermined accuracy even if the suppressable amount of the charging power is smaller than the 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 any one of claims 4 to 7, wherein the control unit excludes a facility having a control error using the message larger than a predetermined error from the candidates for the first facility. The power management server according to claim 8, wherein the control unit selects a facility whose control error is smaller than the predetermined error even if the suppressable amount of the charging power is smaller than the threshold value. A step A is provided in which a candidate for a first facility to which a predetermined control is to be applied is selected from two or more facilities having a distributed power source and a storage battery device.
The predetermined control is a control for suppressing the charging power of the storage battery device using the surplus power of the distributed power source.
The step A is a power management method including a step of excluding a facility whose chargeable power can be suppressed is smaller than a threshold value from the candidates of the first facility.

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