WO2018052117A1

WO2018052117A1 - Electric power management method, electric power management server, local control device, and electric power management system

Info

Publication number: WO2018052117A1
Application number: PCT/JP2017/033466
Authority: WO
Inventors: 一尊中村; 啓晃金内
Original assignee: 京セラ株式会社
Priority date: 2016-09-15
Filing date: 2017-09-15
Publication date: 2018-03-22
Also published as: JPWO2018052117A1

Abstract

Provided is an electric power management method, provided with step A in which a local control device provided to a facility connected to an electric power system performs an operation for charging a storage cell device, which is one of distributed power sources provided to the facility, if reverse flow from the facility to the electric power system is not possible, and does not perform an operation for charging the storage cell device if the reverse flow is possible.

Description

Power management method, power management server, local control device, and power management system

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

2. Description of the Related Art In recent years, in order to maintain the power supply / demand balance of a power system, a technique for suppressing a tidal flow from the power system to the facility or a reverse flow from the facility to the power system is known (for example, Patent Documents 1 and 2). . Further, a system that uses a distributed power source provided in a plurality of facilities as a power source for supplying power to an electric power system (hereinafter referred to as VPP: Virtual Power Plant) has attracted attention.

JP 2013-169104 A JP 2014-128107 A

In the power management method according to the first disclosure, when the reverse power flow from the facility to the power system is possible, the reverse operation is performed without performing the charging operation of the storage battery device which is one of the distributed power sources provided in the facility. Step A is provided for performing a charging operation of the storage battery device when a power flow is not possible.

The power management server according to the second disclosure manages facilities connected to the power system. The power management server includes a transmission unit that transmits a power command message for controlling a distributed power source provided in the facility to a local control device provided in the facility. The power command message includes a charging message instructing charging of a storage battery device provided in the facility. The charging message instructs to charge the storage battery device when a reverse power flow from the facility to the power system is not possible, and when the reverse power flow is possible, the charging operation of the storage battery device Including a first message for instructing to forbid.

The local control device according to the third disclosure is a distributed power source provided in the facility when the local control device provided in the facility connected to the power system can reversely flow from the facility to the power system. The control part which performs the charge operation of the said storage battery apparatus when the said reverse power flow is not possible without performing the charge operation of the storage battery apparatus which is one of these is provided.

A power management system according to a fourth disclosure includes a power management server that manages a facility connected to a power system, and a local control device provided in the facility. When the local control device is capable of reverse power flow from the facility to the power system, the local control device can perform the reverse power flow without performing a charging operation of a storage battery device that is one of the distributed power sources provided in the facility. Otherwise, the storage battery device is charged.

FIG. 1 is a diagram illustrating a power management system 1 according to the embodiment. FIG. 2 is a diagram illustrating the power management server 300 according to the embodiment. FIG. 3 is a diagram illustrating the local control device 400 according to the embodiment. FIG. 4 is a diagram illustrating a power management method according to the embodiment. FIG. 5 is a diagram illustrating a power management method according to the embodiment. FIG. 6 is a diagram illustrating the facility 100 according to the first modification. FIG. 7 is a diagram illustrating a facility 100 according to the third modification.

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

However, it should be noted that the drawings are schematic and ratios of dimensions may differ from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships or ratios are included between the drawings.

[Embodiment]
(Power management system)
Hereinafter, the power management system according to the embodiment will be described. In the embodiment, a VPP is taken as an example of a system that uses the storage battery device 140 provided in the facility 100 as a distributed power source.

As shown in FIG. 1, the power management system 1 includes a facility 100, a network 200, and a power management server 300. In the embodiment, the facility 100A to the facility 100C are illustrated as the facility 100. However, since the facility 100B and the facility 100C have the same configuration as the facility 100A, only the facility 100A will be described here.

The facility 100 is connected to the power system 10 and includes an EMS 110, a power consuming device 120, a solar cell device 130, and a storage battery device 140. In the embodiment, the device provided in the facility is connected to the main trunk line 20 that branches from the power system 10. The solar cell device 130 and the storage battery device 140 are connected to the in-home trunk line 20 in the order of the solar cell device 130 and the storage battery device 140 in the order from the power system 10.

The EMS 110 is an apparatus (Energy Management System) that manages the power of equipment provided in the facility 100. The EMS 110 may be a cloud server via the network 200. The EMS 110 is an example of a local control device, and is an example of a virtual end node (VEN; Virtual End Node) device.

The power consuming device 120 is a facility or device that consumes power. The power consuming device 120 includes equipment or devices such as a refrigerator, a freezer, lighting, an air conditioner, or a television, for example. The power consuming device 120 may include a single facility or device, or may include a plurality of facilities or devices.

Solar cell device 130 is an example of a distributed power source used in VPP and an example of a power generation device. The solar cell device 130 includes a solar cell 131 and a PCS 132. The solar cell 131 is a device that generates power in response to light reception. The PCS 132 is a device (Power Conditioning System) that converts direct current (hereinafter referred to as DC) power discharged from the storage battery 141 into alternating current (hereinafter referred to as AC) power.

In the embodiment, a wattmeter 138 is provided on a power line (first power line) that connects the home trunk 20 and the solar cell device 130. The wattmeter 138 is a wattmeter that measures the generated power of the solar cell device 130, and is, for example, at least one of CT (Current Transformer) and VT (Voltage Transformer). Therefore, the wattmeter 138 is provided closer to the solar cell device 130 than the connection point P1 between the first power line and the home trunk line 20. The PCS 132 is connected to the wattmeter 138 by a wired or wireless signal line, and controls the solar cell 131 by, for example, the MPPT (Maximum Power Point Tracking) method based on the measurement result of the wattmeter 138. The PCS 132 optimizes the operating point (the point determined by the operating point voltage value and the power value, or the point determined by the operating point voltage value and the current value) of the solar cell 131. In the embodiment, the power meter 138 is connected to the PCS 142 by a wired or wireless signal line.

The storage battery device 140 is an example of a distributed power source used in VPP. The storage battery device 140 includes a storage battery 141 and a PCS 142. The storage battery 141 is a device that charges power or discharges power. The PCS 142 is a device (Power Conditioning System) that converts DC power discharged from the storage battery 141 into AC power and converts AC power into DC power charged in the storage battery 141.

In the embodiment, a wattmeter 148 is provided on the home trunk 20. The wattmeter 148 is a wattmeter that measures the power consumption of a downstream device (here, the EMS 110, the power consuming device 120, and the storage battery device 140) provided on the downstream side of the connection point P1, and includes, for example, at least CT and VT. Either. The downstream means a flow in a direction away from the power system 10. Therefore, the wattmeter 138 is provided between the connection point P1 and the connection point P2. The connection point P <b> 2 is a connection point between the home main line 20 and the power line (second power line) connecting the home main line 20 and the storage battery device 140. The PCS 142 is connected to the power meter 148 via a wired or wireless signal line, and controls the storage battery 141 so as not to perform a reverse power flow from the storage battery device 140 to the power system 10 based on the measurement result of the power meter 148. . Specifically, the power meter 148 measures the power obtained by adding the charging power of the storage battery device 140 to the power consumption of the EMS 110 and the power consuming device 120, or uses the power consumption of the EMS 110 and the power consuming device 120. Measure the power minus the discharge power. Therefore, the PCS 142 controls the storage battery 141 so that the measurement result of the wattmeter 148 does not become a negative value.

The network 200 is a communication line that connects the facility 100 and the power management server 300. The network 200 may be, for example, a public line such as the Internet or a mobile communication network, or may be a dedicated line such as a VPN (Virtual Private Network). As the public line, for example, a B route line that does not pass through the smart meter provided in the facility 100 may be used. As the dedicated line, an A route line passing through a smart meter provided in the facility 100 may be used. The smart meter is a power meter that is managed by a power generation company such as an electric power company and is used for calculating the incentive for charging or selling electric power used by the facility 100. A plurality of smart meters may be installed in the facility 100.

The power management server 300 is a server managed by a business operator such as a power generation business, a power transmission / distribution business, or a retail business. The power management server 300 may be managed by an aggregator corresponding to a power transmission / distribution business or a retail business. The aggregator is a business operator that manages the power supply / demand balance of the facility 100 contracted with the aggregator. The aggregator may be entrusted with the management of the power supply-demand balance from a power generation company such as an electric power company. The power management server 300 is an example of a virtual top node (VTN; Virtual Top Node) device.

The power management server 300 may transmit a power command message for controlling a distributed power source provided in the facility 100. The power command message may be a power control message for requesting control of the operation of the distributed power source installed in the facility 100. The power command message may be a power flow control message for requesting control (increase, decrease or maintenance) of power flow from the power system 10 to the facility 100, and control of reverse power flow from the facility 100 to the power system 10 ( It may be a reverse power flow control message requesting (increase, decrease or maintain).

As the format of the power command message, a unique format may be used, or a format that conforms to an automatic demand response (ADR) may be used. More specifically, the power command message can use a method based on the OpenADR2.0 standard.

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

As illustrated in FIG. 2, the power management server 300 includes a communication unit 310, a management unit 320, and a control unit 330.

The communication unit 310 includes a communication module and the like, and communicates with the facility 100. For example, the communication unit 310 transmits a power command message to the facility 100. The communication unit 310 receives distributed power supply information, which will be described later, from the facility 100.

The management unit 320 is configured by a storage medium such as a non-volatile memory and / or HDD, and manages a plurality of facilities 100 connected to the power system 10.

The control unit 330 includes a CPU, a memory, and the like, and controls the communication unit 310 and the management unit 320. The control unit 330 adjusts the power supply / demand balance of the plurality of facilities 100 managed by the management unit 320 as a whole.

In the embodiment, the power command message includes a message for controlling the storage battery device 140. Such a message includes a charging message instructing a charging operation of the storage battery device 140, a discharging message instructing a discharging operation of the storage battery device 140, and a standby message instructing a standby operation of the storage battery device 140. Here, the charging message will be mainly described. The charging message may be a quick charging message instructing a quick charging operation in which the charging time is shorter than normal charging in the storage battery device 140. The power command message may include a test message for instructing a test operation for confirming the operation of the storage battery device 140, an automatic message for instructing an automatic operation of the storage battery device 140, and the storage battery device 140. May be included, and an effective capacity recalculation processing message that is an instruction to recalculate the effective capacity of the storage battery device 140 may be included.

The charging message instructs to perform the charging operation of the storage battery device 140 when the reverse flow from the facility 100 to the power system 10 is not possible, and prohibits the charging operation of the storage battery device 140 when the reverse flow is possible A first message instructing to do so. The charging message may include a second message that instructs to perform the charging operation of the storage battery device 140 regardless of whether or not a reverse power flow from the facility 100 to the power system 10 is possible. “A reverse power flow is possible” may be a state where reverse power flow is actually performed, or a state where reverse power flow is not actually performed but reverse power flow is allowed.

For example, the first message indicates the charging operation of the storage battery device 140 when the charging power of the storage battery device 140 exceeds the power flow from the power system 10 to the facility 100 while the storage battery device 140 is performing the charging operation. It may be a message instructing to stop. The first message may be a message instructing to start the charging operation of the storage battery device 140 when there is a power flow from the power system 10 to the facility 100 in a state where the storage battery device 140 is not performing the charging operation. Good.

Here, the power of the facility 100 is represented by the relationship of “P_GRID + P_PV = P_BT + P_LOAD”. P_GRID represents the tidal power from the power system 10 to the facility 100, and P_PV represents the generated power of the solar cell device 130. P_BT represents charging power (or discharging power) of the storage battery device 140, and P_LOAD represents power consumption of the EMS 110 and the power consuming device 120. The charging power of the storage battery device 140 is represented by a positive value, and the discharging power of the storage battery device 140 is represented by a negative value. Therefore, the tidal current power (P_GRID) can be obtained from the measurement result (P_PV) of the wattmeter 138 and the measurement result (P_BT + P_LOAD) of the wattmeter 148. The charge power (discharge power) of the storage battery device 140 can be acquired by the PCS 142.

In the embodiment, the power command message may include a continuation condition for continuing control by the power command message. When the distributed power source is the storage battery device 140, the continuation conditions are the time condition (from XX hour to XX hour), the discharge condition (until the power of XX kWh is discharged, or the remaining amount of charge is XX kWh. Charging condition (until the remaining amount of electricity exceeds OO kWh until the power of OO kWh is charged). The time condition and the discharge condition may be combined, and the time condition and the charging condition may be combined. The time condition may be specified by the duration (or remaining time) from the reception of the power command message, may be specified by the duration (or remaining time) from a predetermined start time, or only the end time May be specified. In such a case, the discharge condition and the charge condition may be specified in kW.

(Local control device)
Hereinafter, a local control device according to the embodiment will be described. The local control device may be a device that controls the storage battery device 140 in the facility 100. The local control device may be the EMS 110 described above or the PCS 142 described above. The local control device may be configured by both the EMS 110 and the PCS 142. However, when considering the immediacy of the control of the storage battery device 140, the local control device may be considered to be the PCS 142. As shown in FIG. 3, the local control device 400 includes a communication unit 410 and a control unit 420.

The communication unit 410 includes a communication module and the like, and communicates with the power management server 300. For example, the communication unit 410 receives a power command message from the power management server 300. As described above, the power command message includes at least the first message as the charging message.

The control unit 420 includes a CPU and a memory, and controls the communication unit 410. The control unit 420 controls the storage battery device 140 in the facility 100.

In the embodiment, the control unit 420 controls the storage battery device 140 according to at least the first message. The control unit 420 performs the charging operation of the storage battery device 140 when the reverse flow from the facility 100 to the power system 10 is not possible in the operation according to the first message, and when the reverse flow is possible, the storage battery device 140 charging operation is not performed.

(Power management method)
Hereinafter, a power management method according to the embodiment will be described. In FIG. 4, only one local control device 400 is illustrated, but actually, a plurality of local control devices 400 may exist.

In step S10, the power management server 300 transmits a power command message to the local control device 400. Here, the power command message includes the first message described above.

In step S11, the local control device 400 controls the operating state of the distributed power source according to the power command message. The local control device 400 continues control by the power command message until the control period expires. The control period is defined by the continuation condition described above.

In step S12, the power management server 300 transmits a message (result request) requesting the operation control result of the storage battery device 140 to the local control device 400.

In step S <b> 13, the local control device 400 transmits a message (result response) including the operation control result of the storage battery device 140 to the power management server 300.

In step S14, the power management server 300 gives an incentive accompanying a change in the local operation plan optimized in the facility 100. The incentive may be a monetary reward, a reward based on an intangible object such as a gift certificate or a coupon, or a reward based on a tangible object such as a prize.

Subsequently, the operation of the local control device 400 in step S12 will be described. As shown in FIG. 5, in step S <b> 20, the local control device 400 determines whether or not the storage battery device 140 is operating. Examples of the state in which the storage battery device 140 is not in operation include a standby operation or a discharge operation of the storage battery device 140. If the determination result is YES, the process of step S21 is performed, and if the determination result is NO, the process of step S23 is performed.

In step S21, the local control device 400 determines whether or not the charging power (P_BT) exceeds the tidal power (P_GRID). If the determination result is YES, the process of step S22 is performed, and if the determination result is NO, the process of step S25 is performed. The state where the charging power (P_BT) exceeds the tidal power (P_GRID) is a state where reverse power flow from the facility 100 to the power system 10 is possible unless the storage battery device 140 performs the charging operation.

In step S22, the local control device 400 stops the charging operation of the storage battery device 140. Local control device 400 instructs standby operation of storage battery device 140.

In step S23, the local control device 400 determines whether or not there is a power flow from the power system 10 to the facility 100. Whether there is a reverse power flow can be determined by power flow power (P_GRID). If the determination result is YES, the process of step S24 is performed, and if the determination result is NO, the process of step S25 is performed. The state where there is a power flow is a state where reverse power flow from the facility 100 to the power system 10 is not possible even when the storage battery device 140 performs a charging operation.

In step S24, the local control device 400 starts the charging operation of the storage battery device 140. However, the charging operation of the storage battery device 140 is performed so that the charging power (P_BT) does not exceed the tidal power (P_GRID).

In step S25, the local control device 400 determines whether or not the control period has expired. If the determination result is YES, the process of step S26 is performed, and if the determination result is NO, the process returns to step S20.

In step S26, the local control device 400 controls the operation of the storage battery device 140 in order to optimize the power state in the facility 100 (hereinafter referred to as local optimization). The local optimization may be performed after a certain period has elapsed since the control period has expired. The storage battery device 140 performs a standby operation for a certain period.

(Function and effect)
In the embodiment, attention is paid to a case where the unit price of the generated power of the solar cell device 130 is higher than the unit price of the supplied power of the power system 10. In such a case, only the second message instructing to perform the charging operation of the storage battery device 140 is defined as the charging message regardless of whether or not the reverse power flow from the facility 100 to the power system 10 is possible. If this is the case, the storage battery device 140 will be charged with high-cost power (that is, the power generated by the solar cell device 130), and the user of the facility 100 may suffer a disadvantage.

Under such a point of view, in the embodiment, when a reverse power flow from the facility 100 to the power system 10 is not possible, an instruction is given to perform the charging operation of the storage battery device 140, and a reverse power flow is possible. The first message that instructs to prohibit the charging operation of the storage battery device 140 is defined as the charging message. According to such a structure, the user of the facility 100 mentioned above can suppress a disadvantage.

Further, it is conceivable that the power management server 300 dynamically transmits a power command message while taking into consideration the generated power of the solar cell device 130. According to such a configuration, the power command message may be transmitted frequently. There is a concern that there may be a delay associated with grasping the generated power of the solar cell device 130. In the embodiment, such a problem can be solved by defining the first message described above as a charging message.

[Modification 1]
Hereinafter, Modification Example 1 of the embodiment will be described. In the following, differences from the embodiment will be described.

In the embodiment, the tidal power (P_GRID) from the power system 10 to the facility 100 is acquired from the measurement result (P_PV) of the power meter 138 and the measurement result (P_BT + P_LOAD) of the power meter 148.

On the other hand, in the first modification, the tidal power (P_GRID) is acquired from the measurement result of the wattmeter 118 that measures the tidal power (P_GRID) as shown in FIG. The wattmeter 118 is provided on the in-home main line 20 upstream from the connection point P1, and is, for example, at least one of CT and VT. Therefore, the wattmeter 118 can measure the tidal power (P_GRID).

Furthermore, even if the wattmeter 118 is not provided, the tidal power (P_GRID) may be acquired from the above-described smart meter measurement result. Since the smart meter measures the power used or the power sold in the facility 100, the smart meter is provided at the same position as the power meter 118. Therefore, the smart meter can measure the tidal current power (P_GRID).

[Modification 2]
Hereinafter, a second modification of the embodiment will be described. In the following, differences from the embodiment will be described.

In the second modification, when the storage battery device 140 is performing the charging operation, the first message is generated when the power generation amount of the power generation device provided in the facility 100 exceeds the power consumption amount of the load provided in the facility 100. The message which instruct | indicates to stop the charging operation of the storage battery apparatus 140 may be sufficient. The first message is for charging the storage battery device 140 when the power generation amount of the power generation device provided in the facility 100 falls below the power consumption amount of the load provided in the facility 100 in a state where the storage battery device 140 is not performing the charging operation. It may be a message instructing to start the operation. Here, the load means a device excluding the storage battery device 140 among devices provided in the facility 100. In the example illustrated in FIG. 1, the load is the EMS 110 and the power consuming device 120. Here, the power amount means an instantaneous power value (W) or a power amount value (Wh) for a certain period. The electric energy may be an instantaneous current value (A) or a charge value (Ah) for a certain period.

As described above, the first message only needs to include a condition that can be determined by the local control device 400 as a condition for stopping the charging operation of the storage battery device 140. Such a condition is a condition that a reverse power flow from the facility 100 to the power system 10 is possible unless the storage battery device 140 is charged. Similarly, the first message only needs to include a condition that can be determined by the local control device 400 as a condition for starting the charging operation of the storage battery device 140. Such a condition is a condition that a reverse power flow from the facility 100 to the power system 10 is not possible even when the storage battery device 140 is charged.

[Modification 3]
Hereinafter, Modification Example 3 of the embodiment will be described. In the following, differences from the embodiment will be described.

In the embodiment, the case where the PCS of the solar battery 131 and the storage battery 141 is provided individually has been described.

On the other hand, in the third modification, the PCS of the solar cell 131 and the storage battery 141 is one PCS 152 connected to both the solar cell 131 and the storage battery 141 as shown in FIG. In such a case, the facility 100 includes a power meter 158 and a meter 160.

The power meter 158 is provided on the main trunk line 20 upstream of the connection point P3. The connection point P3 is a connection point between the home main line 20 and the power line (third power line) connecting the home main line 20 and the PCS 152 (meter 160). The wattmeter 158 is a wattmeter for controlling the storage battery device 140 so as not to perform reverse power flow from the storage battery 141 to the power system 10, and is, for example, at least one of CT and VT.

The meter 160 is a power meter installed by a business operator that manages the power management server 300, and measures the output power of the PCS 158. The meter 160 is connected to the power management server 300 via a wired or wireless signal line.

In such a case, the output power of the PCS 158 may be a mixture of the power derived from the solar battery 131 and the power derived from the storage battery 141. However, there is a need for the power management server 300 to distinguish and acquire the power derived from the solar battery 131 and the power derived from the storage battery 141 from the measurement result of the meter 160.

Therefore, in the modified example 3, when the power generation device (here, the solar cell device 130) provided in the facility 100 is generating power, the charging operation or discharging operation of the storage battery device (here, the storage battery 141) is performed. A third message instructing to prohibit is defined as a power command message. The third message may be a message instructing to prohibit both the charging operation and the discharging operation when the power generation apparatus is generating power.

[Modification 4]
Hereinafter, Modification Example 4 of the embodiment will be described. In the following, differences from the embodiment will be described.

In the modification example 4, in a self-supporting state in which the storage battery device (here, the storage battery 141) is disconnected from the power system 10, the charging operation of the storage battery 141 by the power generation of the power generation device provided in the facility 100 is permitted. In the reconnection state reconnected to the power system 10, a fourth message that allows reverse power flow after discharging the power charged in the storage battery 141 at least in a self-supporting state is defined as a power command message. For example, the fourth message may be a message that allows reverse power flow after discharging all of the power charged in the storage battery 141 in a self-supporting state in the reconnection state. In other words, the fourth message may be a message for prohibiting reverse power flow until the power charged in the storage battery 141 is discharged at least in a self-supporting state.

The fourth message may be used in combination with the third message described in the third modification. The third message and the fourth message may be realized by one message. For example, the power command message does not permit the charging operation of the storage battery 141 by the power generation of the power generation device when the storage battery 141 is connected to the power system 10, and the charging operation of the storage battery 141 by the power generation of the power generation device in the independent state. May be included. However, such a power command message does not allow reverse power flow until at least the power charged in the storage battery 141 is discharged in a self-supporting state, and at least reverse power flow after discharging the power charged in the storage battery 141 in a self-supporting state. It may be a message that allows

Here, “the power charged in the storage battery 141 in the self-supporting state” may be the generated power of the power generation device when the source power of the storage battery 141 can be identified. “The power charged in the storage battery 141 in the self-supporting state” may be the power charged in the storage battery 141 when the reconnection is performed when the source power of the storage battery 141 is not identifiable.

“The state where power generation by the power generation device is being performed” may be an example of a state where reverse power flow is not possible. An “independent state” may be an example of a state where reverse power flow is not possible. The “state until the electric power charged in the storage battery 141 is discharged in the self-supporting state” may be an example of a state where reverse power flow is not possible.

[Modification 5]
Hereinafter, Modification Example 5 of the embodiment will be described. In the following, differences from the embodiment will be described.

In the fourth modification from the embodiment described above, the case where the local control device 400 operates in accordance with the power command message received from the power management server 300 is exemplified. However, in the modification example 5, the local control device 400 may autonomously perform the operation described in the modification example 4 from the above-described embodiment without depending on the power command message received from the power management server 300.

Specifically, the local control device 400 performs the charging operation of the storage battery 141 when the reverse power flow is possible without performing the charging operation of the storage battery device (here, the storage battery 141). I do.

In such a case, the local control device 400 permits the charging operation of the storage battery 141 by the power generation of the power generation device in the self-sustaining state and charges the storage battery 141 in at least the self-supporting state in the re-connected state, as in the fourth modification. The reverse power flow may be allowed after the discharged power is discharged. For example, the local control device 400 may allow the reverse power flow after discharging all of the electric power charged in the storage battery 141 in a self-supporting state in the reconnection state.

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

In the embodiment, the case where the local control device 400 is at least one of the EMS 110 and the PCS 142 is exemplified. However, the embodiment is not limited to this. The local control device 400 may be a remote controller that controls the PCS 142.

In the embodiment, when the reverse power flow is not possible, the charging operation of the storage battery device 140 is instructed. That is, the time zone in which the reverse power flow is not possible is a time zone in which the charging operation of the storage battery device 140 is allowed (hereinafter, a chargeable time zone). On the other hand, when reverse power flow is possible, the charging operation of the storage battery device 140 is prohibited. That is, the time zone in which the reverse power flow is possible is a time zone during which the charging operation of the storage battery device 140 is prohibited (hereinafter referred to as a charging prohibited time zone). At least one of the chargeable time zone and the charge prohibition time zone may be specified by the power management server 300 or may be set in the local control device 400. The setting of at least one of the chargeable time zone and the charge prohibition time zone in the local control device 400 may be performed by an operator before factory shipment or may be performed by an operator after factory shipment.

In the embodiment, the solar cell device 130 is exemplified as the power generation device provided in the facility 100. However, the embodiment is not limited to this. The power generation device may be a fuel cell device. The fuel cell device includes a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), and a molten fuel cell. Any of carbonate type fuel cells (MCFC: Molten Carbonate Fuel Cell) may be used.

In the embodiment, only an aspect suitable for the power meter of the existing facility 100 is illustrated. Therefore, the power meter that the facility 100 has is not particularly limited. If it is assumed that the power meter can be placed at an arbitrary position, the first message instructs the storage battery device 140 to be charged when the reverse flow from the facility 100 to the power system 10 is not possible. In the case where reverse power flow is possible, any instruction that prohibits the charging operation of the storage battery device 140 may be used. That is, the condition for stopping the charging operation of the storage battery device 140 by the first message can be determined according to the arrangement of the wattmeter. The condition for starting the charging operation of the storage battery device 140 by the first message is also the wattmeter. It is possible to determine according to the arrangement of.

In the embodiment, a wattmeter (a wattmeter 148 shown in FIGS. 1 and 6 and a wattmeter 158 shown in FIG. 7) for preventing a reverse flow from the storage battery device 140 to the power system 10 is provided. However, such reverse power flow may not always be prohibited. For example, the reverse power flow may be temporarily permitted by a request from the power management server 300.

Although not particularly limited, the communication between the power management server 300 and the local control device 400 may be performed by a method conforming to the Open ADR standard. In such a case, a message may be transmitted from the power management server 300 to the local control device 400 as a response of a polling signal from the local control device 400 to the power management server 300. For example, ordrPoll can be used as the polling signal. As the power command message, for example, oaderDistributionEvent can be used. TELEMETRY USAGE and TELEMETRY STATUS can be used as the distributed power information response and the actual response.

The entire contents of Japanese Patent Application No. 2016-180105 (filed on September 15, 2016) and Japanese Patent Application No. 2017-29473 (filed on February 20, 2017) are incorporated herein by reference. Built in.

According to one aspect, it is possible to provide a power management method, a power management server, a local control device, and a power management system that appropriately manage a distributed power source.

Claims

When the reverse power flow from the facility to the power system is possible, the storage battery device that is one of the distributed power sources provided in the facility is not charged and the reverse power flow is not possible. A power management method comprising step A of performing a charging operation.
The power management method according to claim 1, wherein a local control device provided in the facility connected to the power system executes Step A.
From the power management server that manages the facility, the local control device comprises a step B of transmitting a power command message for controlling the distributed power supply,
The power command message includes a charging message instructing charging of the storage battery device,
The charging message instructs to charge the storage battery device when a reverse power flow from the facility to the power system is not possible, and when the reverse power flow is possible, the charging operation of the storage battery device The power management method according to claim 2, further comprising a first message instructing to prohibit the operation.
The first message stops the charging operation of the storage battery device when the charging power of the storage battery device exceeds the power flow from the power system to the facility while the storage battery device is performing the charging operation. The power management method according to claim 3, wherein the power management method is a message instructing to do so.
The first message is a message instructing to start a charging operation of the storage battery device when there is a power flow from the power system to the facility in a state where the storage battery device is not performing a charging operation. The power management method according to claim 3 or 4.
The first message is stored in the storage battery device when a power generation amount of the power generation device provided in the facility exceeds a power consumption amount of a load provided in the facility in a state where the storage battery device is performing a charging operation. The power management method according to claim 3, wherein the power management method is a message instructing to stop the charging operation.
The first message is stored in the storage battery device when the power generation amount of the power generation device provided in the facility is lower than the power consumption amount of the load provided in the facility in a state where the storage battery device is not performing a charging operation. The power management method according to claim 3, wherein the power management method is a message instructing to start a charging operation.
The power management method according to any one of claims 3 to 7, wherein the facility includes at least one of a solar cell device and a fuel cell device as a power generation device.
The charging message includes a second message instructing to perform a charging operation of the storage battery device regardless of whether or not a reverse power flow from the facility to the power system is possible. Item 9. The power management method according to any one of Items 8 to 8.
The power command message includes a third message instructing to prohibit charging operation or discharging operation of the storage battery device when the power generation device provided in the facility is generating power. Item 10. The power management method according to any one of Items 9.
The step B includes a step of transmitting the third message to the local control device provided in the facility having a power conversion device connected to both the power generation device and the storage battery device. The power management method described in 1.
The power command message permits a charging operation of the storage battery device by power generation of a power generation device provided in the facility in a self-supporting state where the storage battery device is disconnected from the power system, and the storage battery device is connected to the power system. 12. The device according to claim 1, further comprising: a fourth message that allows the reverse power flow after discharging the electric power charged in the storage battery device in at least the self-supporting state in the re-linked state. The power management method described in 1.
The step A allows the charging operation of the storage battery device by the power generation of the power generation device provided in the facility in a self-supporting state where the storage battery device is disconnected from the power system. 13. The method according to claim 1, further comprising a step of allowing the reverse power flow after discharging the power charged in the storage battery device in at least the self-supporting state in the interconnected reconnection state. Power management method.
A power management server that manages facilities connected to the power grid,
A transmission unit that transmits a power command message for controlling a distributed power source provided in the facility to a local control device provided in the facility,
The power command message includes a charging message instructing charging of a storage battery device provided in the facility,
The charging message instructs to charge the storage battery device when a reverse power flow from the facility to the power system is not possible, and when the reverse power flow is possible, the charging operation of the storage battery device A power management server including a first message instructing to prohibit
A local control device provided in a facility connected to the power system,
When a reverse power flow from the facility to the power system is possible, the storage battery is not capable of performing the reverse power flow without performing a charging operation of a storage battery device that is one of the distributed power sources provided in the facility. A local control device comprising a control unit that performs a charging operation of the device.
From a power management server that manages the facility, a receiving unit that receives a power command message for controlling the distributed power supply,
The power command message includes a charging message instructing charging of the storage battery device,
The charging message instructs to charge the storage battery device when a reverse power flow from the facility to the power system is not possible, and when the reverse power flow is possible, the charging operation of the storage battery device The local control device according to claim 15, further comprising a first message instructing to prohibit the password.
A power management server for managing facilities connected to the power grid;
A local control device provided in the facility,
When the local control device is capable of reverse power flow from the facility to the power system, the local control device can perform the reverse power flow without performing a charging operation of a storage battery device that is one of the distributed power sources provided in the facility. If not, the power management system performs the charging operation of the storage battery device.
The power management server includes a transmission unit that transmits a power command message for controlling a distributed power source provided in the facility to the local control device,
The power command message includes a charging message instructing charging of a storage battery device provided in the facility,
The charging message instructs to charge the storage battery device when a reverse power flow from the facility to the power system is not possible, and when the reverse power flow is possible, the charging operation of the storage battery device The power management system according to claim 17, further comprising a first message instructing to prohibit the operation.