JP7202490B1 - Power system and control method - Google Patents

Abstract

A power system and a control method capable of appropriately evaluating specific control in which a power storage device autonomously controls charging/discharging based on the frequency of a power system is provided. SOLUTION: An electric power system includes a power storage device that executes specific control for autonomously controlling charging and discharging based on the frequency of a power system, and a control device that controls the power storage device, the control device comprising: An information element specifying a delay time until the adjusted power of the power storage device is reflected based on the frequency of the power system is set in the power storage device, and the power storage device is controlled by the specific control. and frequency information on the frequency of the power system reflecting the delay time are transmitted to the control device. [Selection drawing] Fig. 6

Description

The present invention relates to power systems and control methods.

BACKGROUND ART In recent years, there has been known a technique (for example, VPP (Virtual Power Plant)) that uses a power storage device as a distributed power source in order to maintain the balance of power supply and demand in a power system. In such a case, it is necessary to adjust the frequency of the power system by means of reverse flow power supplied from the facility to the power system (hereinafter referred to as supply and demand adjustment). In order to enable such supply and demand adjustment, a technology has been proposed in which regulated power supplies are divided into categories and an appropriate signal is transmitted for each category (for example, Patent Document 1).

Patent No. 6183576

By the way, when business operators such as AC (Aggregation Coordinator) and RA (Resource Aggregator) request supply and demand adjustment to the facility, the facility responds to the request for supply and demand adjustment by adjusting the frequency of the power grid within the facility. It is assumed that specific control for controlling the power storage device is executed based on the above. Facilities report specific control results to the AC or RA.

In such a case, the specific control method is the first method, in which the GW (Gateway) controls the power storage device based on the frequency of the power grid, and the first method, in which the power storage device autonomously charges and discharges based on the frequency of the power grid. and a second method for controlling .

In the second method, the GW sets the parameters necessary for the specific control in the power storage device and acquires the result of the specific control from the power storage device. The specific control result includes a combination of the grid frequency and the regulated power controlled based on the grid frequency.

Here, the adjustment power (charge power or discharge power) of the power storage device is controlled at time t2 after time t1 based on the power system frequency obtained at time t1. For example, in a case where the GW acquires the result of specific control from the power storage device at time t2, the power storage device transmits to the GW a combination of the frequency of the power system at time t2 and the adjusted power at time t2. That is, the delay time between time t1 and time t2 is not taken into consideration, and the specific control described above cannot be evaluated appropriately.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-described problems. and to provide a control method.

One aspect of the disclosure includes a power storage device that performs specific control to autonomously control charging and discharging based on the frequency of a power system, and a control device that controls the power storage device, wherein the control device controls the power An information element specifying a delay time until the adjusted power of the power storage device is reflected based on the frequency of the power system is set in the power storage device, and the power storage device performs adjustment of the power storage device controlled by the specific control. The electric power system transmits to the control device a combination of electric power and frequency information about the frequency of the electric power system reflecting the delay time.

One aspect of the disclosure includes a power storage device that performs specific control for autonomously controlling charging and discharging based on a frequency of a power system, and a control device that controls the power storage device, wherein the control device controls the power storage An information element specifying the number of frequencies of the power system to be transmitted from the device is set in the power storage device, and the power storage device is specified by the control device as the adjusted power of the power storage device controlled by the specific control. a power system that transmits to the control device a combination of a number of frequencies of the power system and frequency information.

According to one aspect of the disclosure, a control device that controls a power storage device that performs specific control for autonomously controlling charging and discharging based on a frequency of a power system adjusts power of the power storage device based on the frequency of the power system. a step of setting an information element designating a delay time until the delay time is reflected in the power storage device; and transmitting a combination with frequency information about the frequency of the system to the control device.

In one aspect of the disclosure, a control device that controls a power storage device that performs specific control for autonomously controlling charging and discharging based on the frequency of a power system controls the number of frequencies of the power system to be transmitted from the power storage device. a step of setting a designated information element in the power storage device; and frequency information regarding the number of frequencies of the electric power system specified by the control device and the regulated power of the power storage device controlled by the specific control. and sending a combination of to the control device.

Advantageous Effects of Invention According to the present invention, it is possible to provide a power system and control method capable of appropriately evaluating specific control in which a power storage device autonomously controls charging and discharging based on the frequency of a power system.

FIG. 1 is a diagram showing a power management system 1 according to an embodiment. FIG. 2 is a diagram showing a facility 100 according to an embodiment. FIG. 3 is a diagram showing the power storage device 120 according to the embodiment. FIG. 4 is a diagram showing the EMS 160 according to the embodiment. FIG. 5 is a diagram for explaining frequency variation adjustment according to the embodiment. FIG. 6 is a diagram for explaining frequency variation adjustment according to the embodiment. FIG. 7 is a diagram for explaining specific control according to the embodiment. FIG. 8 is a diagram for explaining Option 1 according to the embodiment. FIG. 9 is a diagram for explaining option 2 according to the embodiment. FIG. 10 is a diagram for explaining option 3 according to the embodiment.

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

[Embodiment]
(power management system)
A power management system according to an embodiment will be described below. A power management system may simply be referred to as a power system.

As shown in FIG. 1, power management system 1 has facility 100 . The power management system 1 may include a power management server 200. FIG.

Here, facility 100 and power management server 200 are configured to be able to communicate via network 11 . The network 11 may include the Internet, may include a dedicated line such as a VPN (Virtual Private Network), or may include a mobile communication network.

Facility 100 is connected to power grid 12 and may receive power from power grid 12 or may supply power to power grid 12 . Power from power system 12 to facility 100 may be referred to as tidal power, purchased power, or demand power. Power from facility 100 to power system 12 may be referred to as reverse flow power or sold power. In FIG. 1, as the facility 100, facilities 100A to 100C are illustrated.

Although not particularly limited, the facility 100 may be a facility such as a residence, a facility such as a store, or a facility such as an office. Facility 100 may be an apartment complex containing two or more residences. The facility 100 may be a complex facility including at least two or more facilities of residences, shops, and offices. Details of facility 100 will be described later (see FIG. 2).

The power management server 200 is managed by an operator who manages power related to the power system 12 . A business may be a power generation business, a power transmission and distribution business, or a retail business. The provider may be a resource aggregator (hereinafter referred to as RA) or an aggregation coordinator (AC) that manages RAs. The RA may be a business operator that adjusts the power supply and demand balance of the power system 12 . The adjustment of the power supply and demand balance may include trading (hereinafter referred to as negawatt trading) in which the reduced power of the facility 100 (tidal power) is exchanged for value. Adjusting the power supply and demand balance may include trading increased power of reverse flow power for value. An RA may be a business such as a power generation company, a power transmission/distribution company and a retailer in a VPP.

In an embodiment, communication between power management server 200 and EMS 160 is performed according to a first protocol. On the other hand, communication between EMS 160 and distributed power sources (solar cell device 110, power storage device 120, or fuel cell device 130) is performed according to a second protocol different from the first protocol. For example, as the first protocol, a protocol conforming to Open ADR (Automated Demand Response) or a unique dedicated protocol can be used. For example, the second protocol can use a protocol conforming to ECHONET Lite (registered trademark), SEP (Smart Energy Profile) 2.0, KNX, or a unique proprietary protocol. The first protocol and the second protocol may be different. For example, even if both are proprietary protocols, they may be protocols created according to different rules. However, the first protocol and the second protocol may be protocols created according to the same rules.

(institution)
A facility according to the embodiment will be described below. As shown in FIG. 2, the facility 100 has a solar cell device 110, a power storage device 120, a fuel cell device 130, a load device 140, and an EMS (Energy Management System) 160. Facility 100 may have measurement device 190 .

The solar cell device 110 is a distributed power source that generates power according to light such as sunlight. For example, the solar cell device 110 is composed of a PCS (Power Conditioning System) and a solar panel. Here, the installation may be the connection between the solar cell device 110 and the power system 12 .

The power storage device 120 is a distributed power source that charges and discharges power. For example, the power storage device 120 is composed of PCS and power storage cells. Here, installation may be the connection of power storage device 120 and power system 12 .

The fuel cell device 130 is a distributed power source that uses fuel to generate power. For example, the fuel cell device 130 is composed of PCS and fuel cells. Here, "installation" may mean that the fuel cell device 130 and the power system 12 are connected.

For example, the fuel cell device 130 may be a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEFC), or a phosphoric acid fuel cell. It may be a type fuel cell (PAFC; Phosphoric Acid Fuel Cell) or a molten carbonate type fuel cell (MCFC; Molten Carbonate Fuel Cell).

The load device 140 is a device that consumes power. For example, the load device 140 may include an air conditioner that adjusts the temperature of a predetermined space in the facility 100, or a lighting device that adjusts the illuminance of a predetermined space in the facility 100. FIG. Load devices 140 may include video equipment, audio equipment, refrigerators, washing machines, personal computers, and the like.

EMS 160 manages power for facility 100 . EMS 160 may control solar cell device 110 , power storage device 120 , fuel cell device 130 and load device 140 . In the embodiment, the EMS 160 is exemplified as a device that receives control commands from the power management server 200, but such a device may be called a Gateway or simply a control unit. The EMS 160 may be called LEMS (Local EMS), HEMS (Home EMS), or VPP controller to distinguish it from the power management server 200 . Details of the EMS 160 will be described later (see FIG. 4).

Measurement device 190 measures the power flowing from power system 12 to facility 100 . Measurement device 190 may measure reverse power flow from facility 100 to power system 12 . For example, metering device 190 may be a Smart Meter belonging to a power company. The measuring device 190 may transmit to the EMS 160 every first interval an information element indicating the measurement result (integrated value of the power flow or reverse flow power) at the first interval (for example, 30 minutes). The measurement device 190 may send an information element to the EMS 160 indicating the measurement result at a second interval (eg, 1 minute) that is shorter than the first interval.

(Power storage device)
Power storage devices according to embodiments will be described below. As shown in FIG. 3 , power storage device 120 includes BT 121 , monitoring unit 122 , and control unit 123 . Although omitted in FIG. 3, the power storage device 120 may include a PCS.

BT 121 is a power storage cell included in power storage device 120 .

Monitoring unit 122 monitors the frequency of power system 12 . For example, the monitoring unit 122 is connected to a measuring device installed between the power system 12 and the facility 100, and monitors the power frequency measured by the measuring device. The measurement device may be placed in a location similar to measurement device 190 described above.

Control unit 123 may include at least one processor. The at least one processor may be formed by a single integrated circuit (IC), or by a plurality of communicatively coupled circuits (such as integrated circuits and/or discrete circuit(s)). good too.

The control unit 123 controls the BT121. In the embodiment, control unit 123 performs specific control that autonomously controls charging and discharging based on the frequency of power system 12 .

(EMS)
The EMS according to the embodiment will be described below. As shown in FIG. 4, the EMS 160 has a first communication section 161, a second communication section 162, and a control section 163. In the embodiment, EMS 160 is an example of a control device that controls power storage device 120 .

The first communication unit 161 is configured by a communication module. The communication module can be a wireless communication module that conforms to standards such as IEEE802.11a/b/g/n/ac/ax, ZigBee, Wi-SUN, LTE, 5G, 6G, and standards such as IEEE802.3 may be a wired communication module conforming to

For example, the first communication unit 161 communicates with the power management server 200 via the network 11. FIG. The first communication unit 161 performs communication according to the first protocol, as described above. For example, the first communication unit 161 receives the first message from the power management server 200 according to the first protocol. The first communication unit 161 transmits the first message response to the power management server 200 according to the first protocol.

The second communication unit 162 is configured by a communication module. The communication module can be a wireless communication module that conforms to standards such as IEEE802.11a/b/g/n/ac/ax, ZigBee, Wi-SUN, LTE, 5G, 6G, and standards such as IEEE802.3 may be a wired communication module conforming to

For example, the second communication unit 162 communicates with devices included in the facility 100 (the solar cell device 110, the power storage device 120, the fuel cell device 130). The second communication unit 162 communicates according to the second protocol, as described above. For example, the second communication unit 162 transmits the second message to the distributed power sources according to the second protocol. The second communication unit 162 receives the second message response from the distributed power sources according to the second protocol.

Control unit 163 may include at least one processor. The at least one processor may be formed by a single integrated circuit (IC), or by a plurality of communicatively coupled circuits (such as integrated circuits and/or discrete circuit(s)). good too.

For example, the control unit 163 may control distributed power sources (the solar cell device 110, the power storage device 120, and the fuel cell device 130) provided in the facility 100 based on control commands received from the power management server 200. FIG.

(Frequency fluctuation adjustment)
Fluctuation adjustment of the frequency of the electric power system 12 according to the embodiment will be described below.

As shown in FIG. 5, control related to frequency fluctuation adjustment differs for each fluctuation period to be adjusted. Specifically, the control related to frequency fluctuation adjustment is divided into short-period control in which the fluctuation period to be adjusted is short (for example, about several tens of seconds to several minutes), and control in which the fluctuation period to be adjusted is shorter than the short period. Medium cycle control with a long medium cycle (for example, several minutes to several tens of minutes) and long cycle control in which the fluctuation cycle to be adjusted is longer than the medium cycle (for example, several tens of minutes to several hours) and including.

Here, short cycle control may be referred to as GF (Governor Free). Short-cycle control is control for eliminating supply and demand fluctuations that cannot be followed by medium-cycle control. For example, such fluctuations in supply and demand can be caused by stopping the operation of a regulated power supply that operates under short-cycle control.

Medium cycle control may be called LFC (Load Frequency Control) or may be called AFC (Automatic Frequency Control). Medium-cycle control is control for resolving supply-demand fluctuations that are difficult to predict.

The long cycle control may be called DPC (Dispatching Power Control) or EDC (Economic Load Dispatching Control). Long-cycle control is control for eliminating supply and demand fluctuations based on supply and demand prediction.

Although not particularly limited, the specific control in which the power storage device 120 autonomously controls charging and discharging based on the frequency of the power system 12 may be applied to the above-described short-period control (eg, GF). .

For example, when specific control is performed in short period control (eg, GF), the operation shown in FIG. 6 may be performed. FIG. 6 illustrates the case where AC and RA are separate entities. The adjusted power of power storage device 120 includes at least one of the discharged power of power storage device 120 and the charged power of power storage device 120 . Note that the adjusted power of power storage device 120 is the power autonomously adjusted by power storage device 120 in order to keep the frequency of power system 12 constant.

As shown in FIG. 6, in step S10, the AC transmits a command (adjustment command) for adjusting the frequency of the power grid 12 to the RA. The reconciliation command may be a message according to Open ADR as described above.

In step S 11 , RA transmits to EMS 160 a control command for power storage device 120 for adjusting the frequency of power system 12 . A control command may be a message according to a proprietary protocol between RA and EMS 160 .

In step S20, EMS 160 sets properties related to specific control in power storage device 120. FIG. The property may include an information element for autonomous operation of power storage device 120 under specific control. A property may be considered to be a property for setting specific control to power storage device 120 . Although not particularly limited, in ECHONET Lite (registered trademark), property setting may be executed by a SET command.

Power storage device 120 executes specific control to autonomously control charging and discharging based on the frequency of power system 12 according to property settings.

In step S21, EMS 160 transmits to power storage device 120 a data request requesting a combination of the frequency of power grid 12 and the adjusted power of power storage device 120. FIG. Although not particularly limited, in ECHONET Lite (registered trademark), a data request may be executed by a GET command.

In step S22, EMS 160 receives a data response from power storage device 120 that includes a combination of the frequency of power grid 12 and the regulated power of power storage device 120. FIG. Although not particularly limited, in ECHONET Lite (registered trademark), a data response may be executed by a GET response command.

Note that steps S21 and 22 are repeated according to the request period.

In step S30, the EMS 160 transmits performance information of specific control to RA. The performance information includes a combination of frequency and adjusted power for each request period. In the performance information, the combination of frequency and adjusted power is timestamped. Performance information may be a message according to a proprietary protocol between RA and EMS 160 .

At step S31, RA sends a report containing performance information to AC. The report may be a message according to Open ADR as described above.

Here, it is assumed that the cycle (request cycle) in which EMS 160 requests data from power storage device 120 is longer than the cycle (control cycle) in which power storage device 120 executes specific control. For example, the request period may be 1s. The control cycle may be 100ms or less. The control cycle may be considered to be the cycle (monitoring cycle) in which power storage device 120 monitors the frequency of power system 12 .

For example, as shown in FIG. 7, a case where the control period (or monitoring period) is represented by times _tn , tn ₊₁ , tn ₊₂ , . . . will be illustrated. As described above, the control cycle is shorter than the request cycle. Further, when specific control is executed based on the frequency monitored or acquired at time _tn , the adjusted power adjusted by the specific control is reflected at time tn ₊₂ . In the embodiment, the difference between time t _n+2 and time t _n is called "delay time". The delay time is the time until the adjusted power of power storage device 120 is reflected based on the frequency of power system 12 . The delay time may include delay associated with measurement (monitoring) of the frequency of power system 12, delay in charge/discharge control based on the measured frequency, and delay in reaction of power storage device 120. FIG. The delay time may be considered to be the delay time required for internal processing of power storage device 120 .

Under this premise, when power storage device 120 receives a data request from EMS 160 at time t n ₊ 2, it sends a data response including a combination of the frequency at time t _n and the adjusted power at time t _n+2 . It must be sent to EMS160.

However, if no measures are taken, power storage device 120 is configured to respond with data at the time of receiving the data request. That is, power storage device 120 can only transmit to EMS 160 the frequency at time t _n+2 and the adjusted power at time t _{n+2 when} receiving a data request from EMS 160 at time t n+2 .

In order to solve such problems, the following operations are performed in the embodiment. As an action, the following options are conceivable. In the options shown below, operations between EMS 160 and power storage device 120 are mainly described.

(option 1)
Option 1 is described below with reference to FIG.

As shown in FIG. 8, in step S41, the EMS 160 sets properties regarding specific control to the power storage device 120. FIG. A property may be considered to be a property for setting specific control to power storage device 120 . Here, EMS 160 sets an information element designating the delay time in power storage device 120 . EMS 160 sets an information element designating reflection of the delay time in power storage device 120 . An information element specifying reflection of delay time may be set by a specific flag. The specific flag may be a flag that specifies whether to reflect the delay time. The values that the specific flag can take may include a value that reflects the delay time (valid) and a value that does not reflect the delay time (invalid). Step S41 is the same process as step S20 described above, except that the delay time and the specific flag are set.

In step S42, EMS 160 transmits to power storage device 120 a data request requesting a combination of the frequency of power grid 12 and the adjusted power of power storage device 120. FIG. Step S42 is the same process as step S21 described above.

In step S43, power storage device 120 identifies the adjusted power at the timing of receiving the data request. Since the specific flag is valid, power storage device 120 identifies the frequency in which the delay time is reflected. It should be noted that power storage device 120 identifies the frequency at the timing of receiving the data request when the identification flag is invalid.

In step S44, EMS 160 receives a data response from power storage device 120 that includes a combination of the frequency of power grid 12 and the regulated power of power storage device 120. FIG. Here, the frequency of the power system 12 is the frequency specified in step S43. That is, when the specific flag is valid, the frequency included in the data response is the frequency reflecting the delay time. If the specific flag is invalid, the frequency included in the data response is the frequency at the time the data request was received. The processing of step S44 is the same as the processing of step S22 described above, except that the frequency differs depending on whether the specific flag is valid.

In step S45, EMS 160 timestamps the combination of frequency and adjusted power. Timestamps may be set on a frequency basis. In such a case, the EMS 160 may add a time stamp with a time that is advanced from the time when the data response was received (or the time when the data request was sent).

According to option 1, by setting the delay time, it is possible to obtain an appropriate combination of frequency and regulated power. By setting the specific flag, the type of frequency to be transmitted by power storage device 120 can be distinguished.

Although not particularly limited, when ECHONET Lite (registered trademark) is used, the information element specifying the delay time may be an information element newly defined as an information element (property) related to the SET command. good. The information element (specific flag) designating the reflection of the delay time may be an information element newly defined as an information element (property) relating to the SET command. The information element including the frequency (delay frequency) of the power system 12 reflecting the delay time may be an information element newly defined as an information element (property) relating to the GET command.

(option 2)
Option 2 is described below with reference to FIG.

As shown in FIG. 9, EMS160 sets the property regarding specific control to the electrical storage apparatus 120 in step S51. A property may be considered to be a property for setting specific control to power storage device 120 . Here, EMS 160 sets an information element designating the delay time in power storage device 120 . Step S51 is the same processing as step S20 described above, except that a delay time is set.

In step S52, EMS 160 transmits to power storage device 120 a data request requesting a combination of the frequency of power grid 12 and the adjusted power of power storage device 120. FIG. A data request is a command for requesting a frequency (delay frequency) reflecting a delay time. Note that the existing data request is a command for requesting the frequency at the timing at which the data request was received. Step S52 is the same processing as step S21 described above, except that it is a data request requesting a frequency in which the delay time is reflected.

In step S53, power storage device 120 identifies the adjusted power at the timing of receiving the data request. Power storage device 120 specifies the frequency reflecting the delay time when the frequency reflecting the delay time is requested. Note that, when receiving an existing data request, power storage device 120 identifies the frequency at the timing of receiving the data request.

In step S54, EMS 160 receives a data response from power storage device 120 that includes a combination of the frequency of power grid 12 and the regulated power of power storage device 120. FIG. Here, the frequency of the power system 12 is the frequency specified in step S53. That is, when a delay-reflected frequency is requested, the frequency included in the data response is the delay-reflected frequency. If an existing data response is received, the frequency included in the data response is the frequency at the time the data request was received. The processing of step S54 is the same as the processing of step S22 described above, except that the frequency differs depending on the type of data request.

In step S55, EMS 160 timestamps the combination of frequency and adjusted power. Timestamps may be set on a frequency basis. In such a case, the EMS 160 may add a time stamp with the time that is advanced from the time the data response was received (or the time the data request was sent).

According to Option 2, by setting the delay time, an appropriate combination of frequency and adjustment power can be obtained. By introducing a data request that requests a frequency at the timing at which the data request is received, the type of frequency that power storage device 120 should transmit can be distinguished.

Although not particularly limited, when ECHONET Lite (registered trademark) is used, the information element specifying the delay time may be an information element newly defined as an information element (property) related to the SET command. good. A data request requesting a frequency with a delay time reflected may be a newly defined GET command. Whether or not to request a frequency that reflects the delay time may be distinguished by a specific flag that can be included in the GET command, similar to Option 1. The information element including the frequency (delay frequency) of the power system 12 reflecting the delay time may be an information element newly defined as an information element (property) relating to the GET command.

(option 3)
Option 3 is described below with reference to FIG.

As shown in FIG. 10, EMS160 sets the property regarding specific control to the electrical storage apparatus 120 in step S61. A property may be considered to be a property for setting specific control to power storage device 120 . Here, EMS 160 sets in power storage device 120 an information element designating the number of frequencies of power system 12 to be transmitted from power storage device 120 . EMS 160 sets, in power storage device 120, an information element that designates a cycle (hereinafter referred to as an acquisition cycle) in which power storage device 120 acquires the frequency of power grid 12. FIG. The acquisition cycle may be synonymous with the monitor cycle or control cycle described above. Step S61 is the same process as step S20 described above, except that the number of frequencies and the acquisition period are set.

In step S62, EMS 160 transmits to power storage device 120 a data request requesting a combination of the frequency of power grid 12 and the adjusted power of power storage device 120. FIG. Step S62 is the same process as step S21 described above.

In step S63, power storage device 120 identifies the adjusted power at the timing of receiving the data request. Power storage device 120 identifies two or more frequencies based on the number of frequencies designated in step S61.

In step S64, EMS 160 receives a data response from power storage device 120 that includes a combination of the frequency of power grid 12 and the regulated power of power storage device 120. FIG. Here, the frequencies of power system 12 are the two or more frequencies specified in step S63. The processing of step S64 is similar to the processing of step S22 described above, except that two or more frequencies are included in the data response.

In step S65, EMS 160 identifies the time of each of the two or more frequencies based on the time of receiving the data response (or the time of transmitting the data request) and the acquisition cycle. The EMS 160 identifies the frequency closest to the time when the data response is received (or the time when the data request is sent) with the delay time advanced. EMS 160 timestamps the specified frequency and adjusted power combination. Timestamps may be set on a frequency basis. In such a case, the EMS 160 may add a time stamp with a time that is advanced from the time when the data response was received (or the time when the data request was sent).

According to Option 3, an appropriate combination of frequency and regulated power can be obtained by setting an information element that specifies the number of frequencies of power grid 12 that power storage device 120 should transmit. By setting the information element that specifies the acquisition cycle, the frequency closest to the time stamp can be appropriately specified. However, the acquisition cycle may be known to EMS 160 without setting the information element specifying the acquisition cycle.

Although not particularly limited, when ECHONET Lite (registered trademark) is used, the information element specifying the number of frequencies of the power system 12 to be transmitted from the power storage device 120 is an information element (property) related to the SET command. It may be an information element newly defined as The information element specifying the acquisition cycle may be an information element newly defined as an information element (property) related to the SET command. The information element including the frequency (delay frequency) of the power system 12 reflecting the delay time may be an information element newly defined as an information element (property) relating to the GET command.

(Action and effect)
In the embodiment, the EMS 160 sets an information element specifying the delay time in the power storage device 120, and the power storage device 120 stores the adjusted power of the power storage device 120 controlled by specific control and the power system 12 power system 12 reflecting the delay time. Send frequency and combination to EMS160 (see options 1 and 2). With such a configuration, it is possible to obtain an appropriate combination of frequency and adjustment power. As a result, the EMS 160 realizes proper performance information transmission to the RA, and the proper report transmission from the RA to the AC is realized.

In the embodiment, the EMS 160 sets an information element specifying the number of frequencies of the power system 12 to be transmitted from the power storage device 120 to the power storage device, and the power storage device 120 stores the adjusted power of the power storage device controlled by specific control. Send to EMS 160 the number of grid frequency combinations specified by EMS 160 (see option 3). With such a configuration, it is possible to obtain an appropriate combination of frequency and adjustment power. As a result, the EMS 160 realizes proper performance information transmission to the RA, and the proper report transmission from the RA to the AC is realized.

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

In the above disclosure, the data response transmitted from power storage device 120 to EMS 160 includes the frequency of power system 12 itself. However, the above disclosure is not so limited. The data response transmitted from power storage device 120 to EMS 160 may include frequency information regarding the frequency of power system 12 . For example, frequency information may include deviations in the frequency of power grid 12 rather than the frequency of power grid 12 itself. In such a case, "frequency" may be read as "frequency deviation" in the above disclosure.

Although not particularly mentioned in the disclosure above, the specific control may be executed in units of predetermined time intervals (eg, 3 hours).

In the disclosure mentioned above, the case where the specific control is applied to the short period control (for example, GF) has been exemplified. However, the above disclosure is not so limited. Specific control may be applied to control related to frequency fluctuation adjustment. That is, specific control may be applied to medium cycle control (eg, LFC or AFC) or may be applied to long cycle control (eg, DPC or EDC).

In the disclosure above, the case where the “delay time” is managed in advance by EMS 160 has been mainly described. However, the above disclosure is not so limited. For example, the “delay time” is managed in advance by power management server 200 (eg, RA), and may be notified from power management server 200 to EMS 160 .

Although not specifically mentioned in the disclosure above, the specific control may continue for a certain period of time. For example, when EMS 160 sets specific control to power storage device 120 (for example, steps S20, S41, S51, S61, etc.), EMS 160 transmits to power storage device 120 an information element designating the start time and end time of specific control. Alternatively, the EMS 160 may transmit to power storage device 120 an information element designating the start time of the specific control and the certain period of time, thereby specifying the certain period of time. When the specific control is set in power storage device 120, in the case where power storage device 120 immediately starts the specific control, the information element specifying the start time of the specific control may be omitted.

In the above disclosure, ECHONET Lite was mainly described. However, the above disclosure is not so limited. The above disclosure is also applicable to other protocols such as SEP2.0, KNX.

Although not specifically mentioned in the above disclosure, at least some of the functions of EMS 160 may be executed by a server arranged on network 11 . In other words, EMS 160 may be provided by a cloud service.

DESCRIPTION OF SYMBOLS 1... Power management system, 11... Network, 12... Power system, 100... Facility, 110... Solar cell device, 120... Power storage device, 121... BT, 122... Monitoring unit, 123... Control unit, 130... Fuel cell device, 140... load device, 160... EMS, 161... first communication unit, 162... second communication unit, 163... control unit, 190... measuring device, 200... power management server

Claims (7)

a power storage device that performs specific control that autonomously controls charging and discharging based on the frequency of a power system;
and a control device that controls the power storage device,
The control device sets, in the power storage device, an information element specifying a delay time from when the frequency of the power system is monitored or acquired until the adjusted power of the power storage device is reflected based on the frequency of the power system. death,
The power storage device transmits to the control device a combination of the adjusted power of the power storage device controlled by the specific control and the frequency information regarding the frequency of the power system reflecting the delay time,
The power storage device is connected to the power system,
The electric power system, wherein the regulated electric power of the electric storage device includes at least one of discharged electric power of the electric storage device and charged electric power of the electric storage device . 2. The electric power system according to claim 1, wherein said control device sets an information element designating reflection of said delay time in said power storage device. 2. The power system according to claim 1, wherein when requesting said combination from said power storage device, said control device requests frequency information regarding the frequency of said power system reflecting said delay time. a power storage device that performs specific control that autonomously controls charging and discharging based on the frequency of a power system;
and a control device that controls the power storage device,
The control device sets, in the power storage device, an information element designating the number of frequencies of the electric power system to be transmitted from the power storage device,
The power storage device transmits to the control device a combination of the adjusted power of the power storage device controlled by the specific control and the frequency information regarding the number of frequencies of the power system specified by the control device,
The power storage device is connected to the power system,
The electric power system, wherein the regulated electric power of the electric storage device includes at least one of discharged electric power of the electric storage device and charged electric power of the electric storage device . 5. The electric power system according to claim 4, wherein said control device sets in said electric storage device an information element designating a cycle in which said electric storage device acquires the frequency of said electric power system. A control device that controls a power storage device that executes specific control for autonomously controlling charging and discharging based on the frequency of the power system, after the frequency of the power system is monitored or acquired, is controlled based on the frequency of the power system. setting an information element designating a delay time until the adjusted power of the power storage device is reflected in the power storage device;
the power storage device transmitting to the control device a combination of the adjusted power of the power storage device controlled by the specific control and the frequency information regarding the frequency of the power system reflecting the delay time ;
The power storage device is connected to the power system,
The control method , wherein the adjusted power of the power storage device includes at least one of discharged power of the power storage device and charged power of the power storage device . A control device that controls a power storage device that executes specific control that autonomously controls charging and discharging based on the frequency of the power system, includes an information element that specifies the number of frequencies of the power system to be transmitted from the power storage device. a step of setting the power storage device;
the power storage device transmitting, to the control device, a combination of the adjusted power of the power storage device controlled by the specific control and the number of frequency information regarding the frequency of the electric power system designated by the control device; prepared ,
The power storage device is connected to the power system,
The control method , wherein the adjusted power of the power storage device includes at least one of discharged power of the power storage device and charged power of the power storage device .

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