JP2022050576A - Power management device, power storage device, and power management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power management device, a power storage device, and a power management method for performing setting to discharge electric power stored in the power storage device to an electric power system with the use of a communication protocol between the power management device and the power storage device.

SOLUTION: In a power system 100, an EMS 330 managing a power storage device 310 has a communication unit that notifies the power storage device 310 of a discharge power setting value for setting electric power when the power storage device 310 discharges electric power. The communication unit sets, to part of the discharge power setting value, whether to discharge electric power in a load following manner, whether to discharge electric power at the maximum power value, or whether to discharge electric power at a specified discharge power.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

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

In recent years, a power management device (EMS: Energy Management System) installed in a facility of a power consumer and controlling a plurality of devices has been attracting attention. In such an EMS, a communication protocol is introduced so that a power management device can control a device provided by various manufacturers.

ECHONET Lite (registered trademark; the same applies hereinafter), which is one of such communication protocols, defines a device class for each type of device, and defines the information and control target of the device for each device class as properties.

For example, the power storage device belongs to the storage battery class, and the properties corresponding to the storage battery class include a discharge power setting value, an operation mode setting, a grid interconnection state, and the like (see, for example, Non-Patent Document 1).

"ECHONET SPECIFICATION APPENDIX ECHONET Equipment Object Detailed Regulations Release I", January 15, 2019, Internet <URL: https://echonet.jp/wp/wp-content/uploads/pdf/General/Standard/Release/Release_I_jp/ Appendix_Release_I.pdf ＞

Under the current feed-in tariff (FIT), the power generated by the residential photovoltaic power generation (PV: Photovoltaics) device and stored in the power storage device can be discharged to the power system side. It is regulated so that it cannot be done.

On the other hand, in the future, there is a possibility that the regulation will be relaxed so that even the electric power generated by the residential photovoltaic power generation device and stored in the power storage device can be discharged to the power system side.

However, in a communication protocol such as ECHONET Lite, such a possibility is not taken into consideration, and there is a problem that the electric power stored in the power storage device cannot be set to be discharged to the power system side.

For example, in ECHONET Lite, there is a problem that the property for discharging the stored electric power to the electric power system side is not provided in the storage battery class or the like.

Therefore, the present invention has been made in view of the above-mentioned problems, and the electric power stored in the power storage device is set to be discharged to the power system side by the communication protocol between the power management device and the power storage device. It is an object of the present invention to provide a power management device, a power storage device, and a power management method capable of performing.

The first feature of the embodiment of the present invention is the power management device that manages the power storage device, and the discharge power setting value for setting the power when the power storage device discharges is set for the power storage device. It has a communication unit that notifies the setting, and the gist of the communication unit is to set a part of the discharge power setting value as to whether or not to discharge by load tracking.

The second feature of the embodiment of the present invention is a power management device that manages a power storage device, and has a communication unit that notifies the power storage device to set an operation mode setting for setting an operation mode. However, the gist of the communication unit is to distinguish between a discharge that performs reverse power flow and a discharge that does not perform reverse power flow as the operation mode in the operation mode setting.

The third feature of the embodiment of the present invention is the power management device that manages the power storage device, and the operation of setting the grid interconnection state and the operation mode for setting the connection state with the system for the power storage device. It has a communication unit that notifies to set a mode setting, and the communication unit separately sets a grid interconnection that performs reverse power flow and a grid interconnection that does not perform reverse power flow in the grid interconnection state. The gist is to set the discharge in the operation mode setting.

The fourth feature of the embodiment of the present invention is a power management device that manages a power storage device, and whether the power storage device is discharged at the maximum rating or at a designated output. Alternatively, the gist is to have a communication unit that notifies to set a designated discharge state that sets whether to discharge by load tracking.

The fifth feature of the embodiment of the present invention is the power storage device controlled by the power management device, which is a discharge power setting value for setting the power when the power storage device discharges from the power management device. The gist is to have a communication unit for receiving a notification and a control unit for setting whether or not to discharge by load tracking according to a value specified as a part of the discharge power set value.

A sixth feature of the embodiment of the present invention is a power storage device controlled by a power management device, which is a communication unit that receives a notification of an operation mode setting for setting an operation mode from the power management device, and the operation. It has a control unit that sets the operation mode according to the mode setting, and the operation mode setting can be set separately for a discharge that performs reverse power flow and a discharge that does not perform reverse power flow as the operation mode. The gist is what you can do.

The seventh feature of the embodiment of the present invention is the power storage device controlled by the power management device, and the operation of setting the grid interconnection state and the operation mode for setting the connection state with the grid from the power management device. It has a communication unit that receives notification of mode setting, and a control unit that sets the connection state with the system according to the system interconnection state and sets the operation mode according to the operation mode setting. However, the gist is that the grid interconnection state can be set separately for grid interconnection that performs reverse power flow and grid interconnection that does not perform reverse power flow, and that the operation mode setting can set discharge. do.

The eighth feature of the embodiment of the present invention is a power storage device controlled by a power management device, and it is set whether the power management device discharges at the maximum rating or discharges by load tracking. The communication unit that receives the notification of the specified discharge state, and depending on the specified discharge state, sets whether to discharge at the maximum rating, discharge at the specified output, or discharge by load follow-up. The gist is to have a control unit.

A ninth feature of the embodiment of the present invention is a power management method for managing a power storage device, in which a discharge power setting value for setting the power when the power storage device discharges is set for the power storage device. It has a step of notifying the setting, and the gist of the step is to set a part of the discharge power set value as to whether or not to discharge by load tracking.

The tenth feature of the embodiment of the present invention is a power management method for managing a power storage device, which has a process for the power storage device, and in the process, in the operation mode setting, reverse power flow as the operation mode. The gist is to distinguish between the discharge that performs the reverse power flow and the discharge that does not perform reverse power flow.

The eleventh feature of the embodiment of the present invention is a power management method for managing a power storage device, which is an operation for setting a grid interconnection state and an operation mode for setting a connection state with the system for the power storage device. It has a step of notifying to set a mode setting, and in the step, in the grid interconnection state, a grid interconnection that performs reverse power flow and a grid interconnection that does not perform reverse power flow are set separately, and the operation mode is set. The gist is to set the discharge in the setting.

The twelfth feature of the embodiment of the present invention is a power management method for managing a power storage device, and whether the power storage device is discharged at the maximum rating or at a designated output. Alternatively, the gist is to have a step of notifying the user to set a designated discharge state for setting whether to discharge by load follow-up.

According to an embodiment of the present invention, a power management device, a power storage device, and a power storage device that can be set to discharge the power stored in the power storage device to the power system side by a communication protocol between the power management device and the power storage device. A power management method can be provided.

FIG. 1 is a diagram showing an example of the overall configuration of the electric power system 100 according to the embodiment. FIG. 2 is a diagram showing a power management server 200 according to an embodiment. FIG. 3 is a diagram showing the equipment management server 400 according to the embodiment. FIG. 4 is a diagram showing an EMS 330 according to an embodiment. FIG. 5 is a diagram showing an example of a storage battery class of ECHONET Lite used in the power system 100 according to the embodiment. FIG. 6 is a diagram showing a power storage device 310 according to an embodiment. FIG. 7 is a diagram showing an example of a storage battery class of ECHONET Lite used in the power system 100 according to the embodiment. FIG. 8 is a diagram showing an example of a storage battery class of ECHONET Lite used in the power system 100 according to the embodiment. FIG. 9 is a diagram showing an example of a storage battery class of ECHONET Lite used in the power system 100 according to the embodiment.

Hereinafter, the control system according to the embodiment of the present invention 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.

(First Embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram showing an example of the configuration of the electric power system 100 according to the present embodiment.

As shown in FIG. 1, the power system 100 includes a power management server 200, a facility 300, a facility management server 400, and a predetermined server 500. In FIG. 1, facility 300A to facility 300C are exemplified as facility 300. Here, the power management server 200 and the equipment management server 400 may be separate servers or may be integrated.

Each facility 300 is connected to the power system 110. One facility 300 corresponds to one consumer.

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 electric power system 110 may be a power transmission network outside the consumer in the case of power interchange between consumers in the area separated from the electric power company.

The power management server 200 is a server that controls a distributed power source (for example, a power storage device 310 described later). The power management server 200 transmits a message instructing the EMS 330 provided in the facility 300 to control the power storage device 310 provided in the facility 300. 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. For example, the electric power management server 200 is managed by an electric power company such as a power generation company, a power transmission and distribution company, and a retail company.

As shown in FIG. 2, the power management server 200 has a database 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 database 210 is composed of a non-volatile memory and / and a storage medium such as an HDD, and stores data related to the facility 300 managed by the power management server 200. The facility 300 managed by the electric power management server 200 may be a facility 300 having a contract with an electric power company. For example, the data regarding the facility 300 may be the demand power supplied from the power system 110 to the facility 300. The data regarding the facility 300 may be the type of the distributed power source 310 provided in the facility 300, the specifications of the distributed power source 310 provided in the facility 300, and the like. The specifications may be the rated power generation power (W) and the maximum output power (W) of the distributed power source 310.

The communication unit 220 is composed of a communication module and communicates with the EMS 330 via a predetermined server 500. The communication unit 220 communicates with the predetermined server 500 according to the first communication protocol. For example, as the first communication protocol, a communication protocol compliant with Open ADR (Automated Demand Response) 2.0b or a unique dedicated communication protocol can be used.

The control unit 230 is composed of a control circuit including a memory, a CPU, and the like, and controls each configuration provided in the power management server 200.

The equipment management server 400 is a server that monitors a distributed power source (for example, a power storage device 310 described later). The facility management server 400 transmits a message to the EMS 330 provided in the facility 300 for performing maintenance of the distributed power source 310 provided in the facility 300. For example, maintenance includes inspections for investigating the deterioration of equipment, maintenance for minor maintenance during inspections, repairs for dealing with equipment defects, and replacement of existing equipment with new equipment. The maintenance may be performed while the power storage device 310 is stopped, or may be performed while the power storage device 310 is in operation.

As shown in FIG. 3, the equipment management server 400 has a database 410, a communication unit 420, and a control unit 430.

The database 410 is composed of a non-volatile memory and / and a storage medium such as an HDD, and manages information about a plurality of facilities 300. The database 410 may store the basic information of the equipment provided in each of the plurality of facilities 300. The database 410 stores, for example, the facility name, the facility ID, the equipment name, the equipment ID, the year of introduction, the aging, and the useful life in association with each other.

The communication unit 420 is composed of a communication module and communicates with the EMS 330 via a predetermined server 500. The communication unit 420 communicates with the predetermined server 500 according to the first communication protocol. For example, as the first communication protocol, a communication protocol compliant with Open ADR 2.0b or a unique dedicated communication protocol can be used.

The control unit 430 is composed of a control circuit including a memory, a CPU, and the like, and controls each configuration provided in the equipment management server 400.

The predetermined server 500 is a server that relays communication between the power management server 200 and the facility management server 400 and the facility 300. For example, the predetermined server 500 is managed by 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 electricity (negawatt) by reducing the power consumption of the facility managed by the resource aggregator. Such surplus power may be regarded as generated power. The resource aggregator may be an electric power company that absorbs excess electric power by increasing the power consumption of the facility managed by the resource aggregator (for example, increasing the charge amount of the power storage device).

As shown in FIG. 1, the facility 300 has a distributed power source (specifically, a power storage device 310), a load device 320, and an EMS 330.

The distributed power source may be a fuel cell device that generates electricity using fuel. The fuel cell device is a device that generates power using fuel. For example, the fuel cell apparatus 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 type fuel cell. It may be a fuel cell (PAFC: Phosphoric Acid Fuel Cell) or a molten carbonate fuel cell (MCFC: Molten Carbonate Fuel Cell). The distributed power source may be a power generation device that generates power using natural energy such as solar power, wind power, hydraulic power, and geothermal power. In the present embodiment, the distributed power source will be described as being a power storage device 310 for charging and discharging electric power.

The power storage device 310 is a device that charges and discharges under the control of the EMS 330. For example, the power storage device 110 is a lithium ion power storage device, a lead power storage device, a nickel / hydrogen power storage device, or the like.

The electric power discharged by the power storage device 310 may be supplied to the load device in the facility 300 or may be supplied to the power system 10. Further, in the present embodiment, the electric power generated by the power generation device may be sold and operated in the "push-up mode" in which the load device 320 in the facility 300 is covered by the discharge of the power storage device 310. The power storage device 310 can charge, for example, the power supplied by the power system 110 or the surplus power of the power generation device.

The load device 320 is a device that consumes electric power. For example, the load device 320 is an air-conditioning device, a lighting device, a hot water supply device, an AV (Audio Visual) device, an electric vehicle, a charger / discharger, and the like.

The EMS 330 is a power management device that manages the power of the facility 300. The EMS 330 may control the operating state of the power storage device 310 and the load device 320. EMS330 is an example of VEN (Visual End Node).

As shown in FIG. 4, the EMS 330 has a communication unit 331 and a control unit 332.

The communication unit 331 is composed of a communication module, and communicates with a predetermined server 500, a power storage device 310, and a load device 320. The communication unit 331 communicates with the predetermined server 500 according to the first communication protocol. For example, as the first communication protocol, a communication protocol compliant with Open ADR 2.0b or a unique dedicated communication protocol can be used. On the other hand, the communication unit 331 communicates with the power storage device 310 and the load device 320 according to the second communication protocol. For example, as the second communication protocol, a communication protocol compliant with ECHONET Lite, SEP (Smart Energy Profile) 2.0, KNX, or a unique dedicated communication protocol can be used.

The communication unit 331 notifies the power storage device 310 to set a discharge power setting value for setting the power when the power storage device 310 discharges. Here, the communication unit 311 sets a part of the discharge power set value as to whether or not to discharge by load tracking (that is, whether or not there is no reverse power flow).

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 uses the “Set” (Set command) (see FIG. 5) of the discharge power set value property of the storage battery class to store the power storage device 310. Is notified to set the above-mentioned discharge power setting value.

The discharge power setting value property of the storage battery class shown in FIG. 5 specifies "whether or not to discharge according to the load (whether or not there is no reverse power flow)" in the property content for the existing discharge power setting value property. The point of "to do" is newly defined, and the point of "0xFFFFFFFF: discharge by load tracking (no reverse power flow)" is newly defined in the value range. The value indicating such "discharge by load tracking (no reverse power flow)" does not have to be "0xFFFFFFFF", and may be, for example, a maximum value in the range, a value larger than the rated output, or the like.

The discharge power setting value property of the storage battery class shown in FIG. 5 is not only "Get" for acquiring information from the power storage device 310, but also "INF" for notifying the state of the power storage device 310 and the power storage device 310. It is newly specified so that it can also be used as a "Set" for setting.

The control unit 332 controls the operating state of the distributed power source such as the power storage device 310 and the load device 320 in the facility 300.

As shown in FIG. 6, the power storage device 310 includes a communication unit 311 and a control unit 312.

The communication unit 311 is composed of a communication module and communicates with the EMS 330. As described above, the communication unit 311 communicates according to the second protocol.

The communication unit 311 receives a notification from the EMS 330 of the discharge power set value for setting the power when the power storage device 310 discharges. For example, when ECHONET Lite is used as the second communication protocol, the communication unit 311 uses the above-mentioned discharge power from the “Set” (see FIG. 5) of the discharge power setting value property of the storage battery class transmitted by the EMS 330. Get the set value.

The control unit 312 controls the operating state (storage, discharge, etc.) of the power storage device 310 in response to an instruction from the EMS 330.

The control unit 312 sets whether or not to discharge by load tracking in the power storage device 310 according to a value defined as a part of the discharge power set value acquired by the communication unit 312.

For example, when ECHONET Lite is used as the second communication protocol, the control unit 312 uses the power storage device 310 based on the value specified in "0xFFFFFFF" in the value range of the discharge power set value property of the storage battery class. Set whether or not to discharge by following the load in. Here, the control unit 312 sets that when the value is not set in "0xFFFFFFFF" in the value range of the discharge power set value property of the storage battery class, the power storage device 310 sets the discharge according to the load, and discharges the storage battery class. When a value is set in "0xFFFFFFF" in the value range of the power setting value property, the power storage device 310 is set not to discharge due to load tracking.

Although the present embodiment describes a case where the EMS 330 is provided in the facility 300, the present invention is not limited to such a case, and the present invention can be applied to a case where the EMS 330 is provided in the predetermined server 500. In such a case, communication is performed between the predetermined server 500 and the power storage device 310 according to, for example, ECHONET Lite.

According to the present embodiment, the electric power stored in the power storage device 310 by the communication protocol between the EMS 330 and the power storage device 310 is discharged to the power system 110 side while minimizing the modification to the existing communication protocol. Can be set.

(Second Embodiment)
Hereinafter, the second embodiment of the present invention will be described with reference to FIG. 7, focusing on the differences from the first embodiment described above.

The communication unit 331 of the EMS 330 notifies the power storage device 310 to set the operation mode setting for setting the operation mode. Here, in the operation mode setting, the communication unit 331 distinguishes between a discharge that performs reverse power flow and a discharge that does not perform reverse power flow as the operation mode.

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 uses the “Set” (see FIG. 7) of the operation mode setting property of the storage battery class with respect to the power storage device 310 as described above. Notify you to set the operation mode of.

Here, the operation mode setting property of the storage battery class shown in FIG. 7 is such as quick charge, charge, discharge (no reverse power flow), standby, test, automatic, restart, effective capacity recalculation process, and discharge (no reverse power flow). (There is reverse power flow).

That is, the operation mode setting property of the storage battery class shown in FIG. 7 newly defines discharge (without reverse power flow) and discharge (with reverse power flow) with respect to the operation mode setting property of the existing storage battery class.

Specifically, in the operation mode setting property of the storage battery class, "discharge" in the operation mode setting property of the existing storage battery class is read as "discharge (without reverse power flow)", and "discharge (with reverse power flow)" is newly changed. It may be added, or "discharge (with reverse power flow)" and "discharge (without reverse power flow)" may be newly added.

Similarly, the operating state properties of the storage battery class shown in FIG. 7 include quick charging, charging, discharging (no reverse flow), standby, test, automatic, restarting, effective capacity recalculation processing, and discharging as such operating operating states. Indicates either (with reverse current).

That is, the operation operation state property of the storage battery class shown in FIG. 7 newly defines discharge (without reverse power flow) and discharge (with reverse power flow) with respect to the operation operation state property of the existing storage battery class.

The communication unit 311 of the power storage device 310 receives the notification of the operation mode setting for setting the operation mode from the EMS 330. For example, when ECHONET Lite is used as the second communication protocol, the communication unit 311 sets the above-mentioned operation mode from the “Set” (see FIG. 7) of the operation mode setting property of the storage battery class transmitted by the EMS 330. To get.

Further, for example, when ECHONET Lite is used as the second communication protocol, the communication unit 311 refers to the EMS330 based on the operation operation state property "Get" (see FIG. 7) transmitted by the EMS330. , Notifies the operating operation state of the power storage device 310.

The control unit 312 of the power storage device 310 sets the operation mode of the power storage device 310 according to the operation mode setting acquired by the communication unit 311.

For example, when ECHONET Lite is used as the second communication protocol, the control unit 312 sets reverse power flow as the operation mode when "0x43" is set within the value range of the operation mode setting of the storage battery class. If the discharge that is not performed is set and "0x40" is set within the value range of the operation mode setting of the storage battery class, the discharge that performs reverse power flow is set as the operation mode. By defining in this way, compatibility with the existing ECHONET Lite can be maintained.

According to the present embodiment, the electric power stored in the power storage device 310 by the communication protocol between the EMS 330 and the power storage device 310 is discharged to the power system 110 side while minimizing the modification to the existing communication protocol. Can be set.

(Third Embodiment)
Hereinafter, the third embodiment of the present invention will be described with reference to FIG. 8, focusing on the differences from the above-mentioned first embodiment and the second embodiment.

The communication unit 331 of the EMS 330 notifies the power storage device 310 to set the grid interconnection state for setting the connection state with the power system 110 and the operation mode setting for setting the operation mode.

Here, the communication unit 331 distinguishes between the grid interconnection that performs reverse power flow and the grid interconnection that does not perform reverse power flow in the above-mentioned grid interconnection state, and sets the discharge in the above-mentioned operation mode setting.

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 uses the “Set” (see FIG. 8) of the “Set” of the grid interconnection state property of the storage battery class, and the power storage device 310. Is notified to set the above-mentioned grid interconnection state, and the above-mentioned operation mode is set to the power storage device 310 by using the “Set” (see FIG. 8) of the operation mode setting property of the storage battery class. Notify to set.

Here, the operation mode setting property of the storage battery class shown in FIG. 8 is the same as the existing operation mode setting property, as such operation mode, quick charge, charge, discharge, standby, test, automatic, restart, effective capacity re-operation. Indicates calculation processing or any other. That is, the operation mode setting property of the storage battery class shown in FIG. 8 is the same as the operation mode setting property of the existing storage battery class.

Further, the grid interconnection state property of the storage battery class shown in FIG. 8 is not only "Get" for acquiring information from the power storage device 310, but also "INF" for notifying the state of the power storage device 310 and power storage. It is newly defined so that it can also be used as a "Set" for setting the device 310.

The communication unit 331 may notify the power storage device 310 to set the above-mentioned grid interconnection state, and then notify the above-mentioned operation mode setting, or the above-mentioned grid interconnection. You may be notified at the same time to set the system status and the operation mode setting.

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 uses the “Set” of the grid interconnection state property (see FIG. 8) of the storage battery class with respect to the power storage device 310. Notify to set the above-mentioned grid interconnection state, and set the above-mentioned operation mode for the power storage device 310 by using the operation mode setting property "Set" (see FIG. 8) of the storage battery class. Notice.

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 simultaneously transmits "Set" of the grid interconnection state property of the storage battery class and "Set" of the operation mode setting property of the storage battery class. You may.

Alternatively, when ECHONET Lite is used as the second communication protocol, the communication unit 331 transmits "Set" of the grid interconnection state property of the storage battery class, and then "Set" of the operation mode setting property of the storage battery class. May be sent.

The communication unit 311 of the power storage device 310 receives the notification of the system interconnection state and the operation mode setting described above from the EMS 330. For example, when ECHONET Lite is used as the second communication protocol, the communication unit 311 obtains the above-mentioned grid interconnection state from the grid interconnection status property “Set” (see FIG. 8) transmitted by the EMS 330. The above-mentioned operation mode setting is acquired from "Set" (see FIG. 8) of the operation mode setting property of the storage battery class acquired and transmitted by the EMS330.

Here, the communication unit 311 may receive the above-mentioned notification of the operation mode setting after receiving the above-mentioned notification of the system interconnection state, or the above-mentioned notification of the system interconnection state and the above-mentioned notification of the operation mode setting. May be received at the same time.

The control unit 312 of the power storage device 310 sets the connection state of the power storage device 310 with the power system 110 according to the system interconnection state acquired by the communication unit 311, and sets the operation mode acquired by the communication unit 311. The operation mode of the power storage device 310 is set accordingly.

For example, when ECHONET Lite is used as the second communication protocol, "0x00" is set in the value range of the grid interconnection state property of the storage battery class in the control unit 312, and the operation mode setting of the storage battery class is set. When "0x43" is set in the value range, the discharge that performs reverse power flow is set as the operation mode, and "0x02" is set in the value range of the grid interconnection state property of the storage battery class, and the storage battery class. When "0x43" is set within the value range of the operation mode setting of, the discharge that does not perform reverse power flow is set as the operation mode.

According to the present embodiment, the electric power stored in the power storage device 310 by the communication protocol between the EMS 330 and the power storage device 310 is discharged to the power system 110 side while minimizing the modification to the existing communication protocol. Can be set.

(Fourth Embodiment)
Hereinafter, the fourth embodiment of the present invention will be described with reference to FIG. 9, focusing on the differences from the first to third embodiments described above.

The communication unit 331 of the EMS 330 sets the designated discharge state for the power storage device 310 to set whether to discharge at the maximum rating, discharge at the designated output, or discharge according to the load. Notify to. Here, it is assumed that the designated power is set in "Set" of the discharge power set value property of the storage battery class.

For example, when ECHONET Lite is used as the second communication protocol, the communication unit 331 uses the “Set” (see FIG. 9) of the designated discharge state property of the storage battery class with respect to the power storage device 310 as described above. Notify to set the specified discharge state of. The designated discharge state property of the storage battery class is a property not specified by the existing ECHONET Lite. The content of the designated discharge state property of the storage battery class shown in FIG. 9 is to set the discharge method at the time of discharging the power storage device 310 and acquire the set state.

The communication unit 311 of the power storage device 310 receives the above-mentioned notification of the designated discharge state from the EMS 330. For example, when ECHONET Lite is used as the second communication protocol, the communication unit 311 acquires the above-mentioned designated discharge state from the designated discharge state property (see FIG. 9) of the storage battery class.

The control unit 312 of the power storage device 310 sets whether to discharge at the maximum rating or discharge according to the load according to the designated discharge state acquired by the communication unit 311.

For example, when ECHONET Lite is used as the second communication protocol, the control unit 312 is rated maximum (or designated) when "0x41" is set within the value range of the specified discharge state of the storage battery class. (Output) is set to perform discharge, and if "0x42" is set within the value range of the specified discharge state of the storage battery class, it is set to discharge by load tracking.

According to the present embodiment, it is possible to set the power stored in the power storage device 310 to be discharged to the power system 110 side by the communication protocol between the EMS 330 and the power storage device 310 while utilizing the existing communication protocol. can.

(Change example)
In the second embodiment and the third embodiment described above, the communication unit 331 of the EMS 330 may notify the power storage device 310 of the power purchase target value for preventing reverse power flow.

Here, the communication unit 331 may notify the margin between the load power and the discharge amount when the discharge without reverse power flow is set as the power purchase target value. For example, the communication unit 331 may notify the ratio such as 0% or 5% as the power purchase target value, or may notify the power value such as 0W or 100W.

When the control unit 312 of the power storage device 310 is set to perform discharge without reverse power flow, the control unit 312 controls the discharge in the power storage device 310 based on the margin notified as the above-mentioned power purchase target value.

100 ... Power system 200 ... Power management server 210, 410 ... Database 220, 311, 331, 420 ... Communication unit 230, 312, 332, 430 ... Control unit 300 ... Facility 310 ... Power storage device 320 ... Load device 330 ... EMS
400 ... Equipment management server 500 ... Prescribed server

Claims (9)

It is a power management device that manages a power storage device.
The power storage device has a communication unit that transmits a first message for acquiring a discharge method when discharge is set in the operation mode setting.
The communication unit sets a predetermined value indicating at least one of discharge at load tracking, discharge at maximum discharge power value, and discharge at specified discharge power as a discharge method when discharge is set in the operation mode setting. A power management device that receives a second message including the power storage device from the power storage device. A power storage device controlled by a power management device.
It has a communication unit that receives a first message for acquiring a discharge method when discharge is set in the operation mode setting from the power management device.
The communication unit receives the first message, and as a discharge method when the discharge is set in the operation mode setting, the discharge according to the load, the discharge at the maximum discharge power value, and the discharge at the specified discharge power. A power storage device that transmits a second message including a predetermined value indicating at least one of them to the power management device. It is a power management method for managing power storage devices.
Sending a first message to the power storage device to acquire the discharge method when the discharge is set in the operation mode setting, and
As a discharge method, a second message including a predetermined value indicating at least one of discharge according to load when discharge is set in the operation mode setting, discharge at the maximum discharge power value, and discharge at the specified discharge power is sent. A power management method comprising receiving from the power storage device. It is a power management method in a power storage device controlled by a power management device.
Receiving the first message for acquiring the discharge method when the discharge is set in the operation mode setting from the power management device, and
As a discharge method when the discharge is set in the operation mode setting in response to the reception of the first message, at least one of discharge according to load, discharge at the maximum discharge power value, and discharge at the specified discharge power is used. A power management method including transmitting a second message including a predetermined value indicating to the power management device to the power management device. As a discharge method, the communication unit has a first predetermined value indicating discharge following a load, a second predetermined value indicating discharge at the maximum discharge power value, and a third predetermined value indicating discharge at the specified discharge power. The second message containing at least one is received from the power storage device.
The power management device according to claim 1. It is a power management device that manages a power storage device.
A predetermined discharge method indicating at least one of discharge following a load, discharging at a maximum discharge power value, and discharging at a specified discharge power as a discharge method when discharge is set in the operation mode setting for the power storage device. It has a communication unit that sends a first message containing a value,
The power storage device is a power management device that sets at least one of a load-following discharge, a maximum discharge power discharge, and a designated discharge power discharge according to the predetermined value. A power storage device controlled by a power management device.
A predetermined value indicating at least one of discharge following a load, discharging at a maximum discharge power value, and discharging at a specified discharge power as a discharge method when discharge is set in the operation mode setting from the power management device. The communication unit that receives the first message including
A power storage device including a control unit that sets at least one of discharge according to a load, discharge at a maximum discharge power, and discharge at a designated discharge power according to the predetermined value. It is a power management method for managing power storage devices.
A predetermined discharge method indicating at least one of discharge following a load, discharging at a maximum discharge power value, and discharging at a specified discharge power as a discharge method when discharge is set in the operation mode setting for the power storage device. Including sending a first message containing a value
The power storage device is a power management method in which at least one of discharge following a load, discharge at a maximum discharge power, and discharge at a designated discharge power is set according to the predetermined value. It is a power management method in a power storage device controlled by a power management device.
A predetermined value indicating at least one of discharge following a load, discharging at a maximum discharge power value, and discharging at a specified discharge power as a discharge method when discharge is set in the operation mode setting from the power management device. To receive the first message containing
A power management method comprising setting at least one of a load-following discharge, a maximum discharge power discharge, and a designated discharge power discharge according to the predetermined value.

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