JP6359714B2 - Management system, management method, control device, and storage battery device - Google Patents

Description

  The present invention relates to a management system, a management method, a control device, and a storage battery device having a storage battery device that charges and discharges power using a storage battery and a control device that communicates with the storage battery device.

  In recent years, a power management system having a plurality of devices and a control device that controls the plurality of devices has been proposed (for example, Patent Document 1). The plurality of devices are, for example, home electric appliances such as air conditioners and lighting devices, and distributed power sources such as solar cells, storage batteries, and fuel power generation devices. Controller, for example, HEMS (Home Energy Management System), SEMS (Store Energy Management System), BEMS (Building Energy Management System), FEMS (Factory Energy Management System), referred to as CEMS (Cluster / Community Energy Management System) Is done.

  In order to spread the management system described above, it is effective to make a message format common between a plurality of devices and a control device, and attempts have been made to make such a message format common.

JP 2010-128810 A

  The above-mentioned standardization of the message format has just begun, and various studies are necessary for the message format for appropriately controlling the device.

  Accordingly, the present invention has been made to solve the above-described problem, and an object thereof is to provide a management system, a management method, a control device, and a power storage device that can appropriately control a device. .

  The management system which concerns on a 1st characteristic has an electrical storage apparatus provided with the storage battery which accumulate | stores electric power, and a control apparatus which communicates with the said electrical storage apparatus. Between the control device and the power storage device, a message is defined that designates one of a plurality of operation modes with different charge / discharge criteria for the storage battery.

  1st characteristic WHEREIN: The said control apparatus instruct | indicates the operation mode of the said storage battery to the said electrical storage apparatus by transmitting the message which designates any of these operation modes to the said electrical storage apparatus.

  In the first feature, the control device receives the message designating one of the plurality of operation modes from the power storage device, and in which of the plurality of operation modes the power storage device is operating. To get.

  In the first feature, prior to communication of a message designating one of the plurality of operation modes, the control device displays a message indicating whether or not there is a function for handling a message designating one of the plurality of operation modes. Received from the power storage device.

  In the first feature, the plurality of operation modes include an operation mode in which a distributed power source other than the storage battery and the storage battery cooperate with each other.

  In the first feature, the distributed power source other than the storage battery is a solar battery.

  The management method according to the second feature is a method used in a management system having a power storage device including a storage battery that stores electric power and a control device that communicates with the power storage device. Between the control device and the power storage device, a message is defined that designates one of a plurality of operation modes with different charge / discharge criteria for the storage battery. The management method includes a step of transmitting a message designating any of the plurality of operation modes from the control device to the power storage device, or the plurality of operation modes from the power storage device to the control device. A step of transmitting a message designating any of the above.

  The control device according to the third feature communicates with a power storage device including a storage battery that stores electric power. Between the control device and the power storage device, a message is defined that designates one of a plurality of operation modes with different charge / discharge criteria for the storage battery. The control device includes a communication unit that receives a message designating any of the plurality of operation modes from the power storage device or transmits a message designating any of the plurality of operation modes to the power storage device.

  A power storage device according to a fourth feature includes a storage battery that stores electric power. Between the control device that communicates with the power storage device and the power storage device, a message that specifies any one of a plurality of operation modes having different charging / discharging criteria for the storage battery is defined. The power storage device includes a communication unit that transmits a message designating any of the plurality of operation modes to the control device and receives a message designating any of the plurality of operation modes from the control device.

  ADVANTAGE OF THE INVENTION According to this invention, the management system, management method, control apparatus, and electrical storage apparatus which can control an apparatus appropriately can be provided.

FIG. 1 is a diagram illustrating an energy management system 100 according to the first embodiment. FIG. 2 is a diagram illustrating the customer 10 according to the first embodiment. FIG. 3 is a diagram showing the fuel cell device 150 according to the first embodiment. FIG. 4 is a diagram illustrating a network configuration according to the first embodiment. FIG. 5 is a diagram illustrating the EMS 200 according to the first embodiment. FIG. 6 is a diagram showing a message format according to the first embodiment. FIG. 7 is a diagram showing a message format according to the first embodiment. FIG. 8 is a diagram showing a message format according to the first embodiment. FIG. 9 is a sequence diagram illustrating the management method according to the first embodiment.

  Hereinafter, a management system according to an embodiment of the present invention 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 and the like are different 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 and ratios are included between the drawings.

[Outline of Embodiment]
The management system which concerns on embodiment has an electrical storage apparatus provided with the storage battery which accumulate | stores electric power, and a control apparatus which communicates with the said electrical storage apparatus. Between the control device and the power storage device, a message is defined that designates one of a plurality of operation modes with different charge / discharge criteria for the storage battery.

  Here, as the operation mode of the storage battery, there are cases where there are a plurality of operation modes with different storage battery charging and discharging standards. In such a case, when the control device controls charging / discharging of the storage battery according to the operation mode of the storage battery, the power storage device cannot be appropriately controlled due to a communication delay between the control device and the power storage device. there is a possibility.

  In the embodiment, the storage battery charge / discharge control according to the operation mode of the storage battery is left to the power storage device, and a message that specifies any one of a plurality of operation modes having different storage battery charge / discharge standards is defined. Accordingly, the control device can appropriately control the power storage device without being affected by a communication delay between the control device and the power storage device. In addition, the control device can grasp the power generation amount of the power storage device and can appropriately control other devices (load, fuel cell device, etc.).

[First Embodiment]
(Energy management system)
Hereinafter, the energy management system according to the first embodiment will be described. FIG. 1 is a diagram illustrating an energy management system 100 according to the first embodiment.

  As shown in FIG. 1, the energy management system 100 includes a customer 10, a CEMS 20, a substation 30, a smart server 40, and a power plant 50. The customer 10, the CEMS 20, the substation 30 and the smart server 40 are connected by a network 60.

  The consumer 10 includes, for example, a power generation device and a power storage device. The power generation device is a device that outputs electric power using fuel gas, such as a fuel cell. The power storage device is a device that stores electric power, such as a secondary battery.

  The consumer 10 may be a detached house or an apartment house such as a condominium. Alternatively, the customer 10 may be a store such as a convenience store or a supermarket, a commercial facility such as a building, or a factory.

  In the first embodiment, a customer group 10 </ b> A and a customer group 10 </ b> B are configured by a plurality of consumers 10. The consumer group 10A and the consumer group 10B are classified by, for example, a geographical area.

  The CEMS 20 controls interconnection between the plurality of consumers 10 and the power system. The CEMS 20 may be referred to as a CEMS (Cluster / Community Energy Management System) in order to manage a plurality of consumers 10. Specifically, the CEMS 20 disconnects between the plurality of consumers 10 and the power system at the time of a power failure or the like. On the other hand, the CEMS 20 interconnects the plurality of consumers 10 and the power system when power is restored.

  In the first embodiment, a CEMS 20A and a CEMS 20B are provided. For example, the CEMS 20A controls interconnection between the customer 10 included in the customer group 10A and the power system. For example, the CEMS 20B controls interconnection between the customer 10 included in the customer group 10B and the power system.

  The substation 30 supplies electric power to the plurality of consumers 10 via the distribution line 31. Specifically, the substation 30 steps down the voltage received from the power plant 50.

  In the first embodiment, a substation 30A and a substation 30B are provided. For example, the substation 30A supplies power to the consumers 10 included in the consumer group 10A via the distribution line 31A. For example, the substation 30B supplies power to the consumers 10 included in the consumer group 10B via the distribution line 31B.

  The smart server 40 manages a plurality of CEMSs 20 (here, CEMS 20A and CEMS 20B). The smart server 40 also manages a plurality of substations 30 (here, the substation 30A and the substation 30B). In other words, the smart server 40 comprehensively manages the customers 10 included in the customer group 10A and the customer group 10B. For example, the smart server 40 has a function of balancing the power to be supplied to the consumer group 10A and the power to be supplied to the consumer group 10B.

  The power plant 50 generates power using thermal power, wind power, hydraulic power, nuclear power, and the like. The power plant 50 supplies power to the plurality of substations 30 (here, the substation 30A and the substation 30B) via the power transmission line 51.

  The network 60 is connected to each device via a signal line. The network 60 is, for example, the Internet, a wide area network, a narrow area network, a mobile phone network, or the like.

(Customer)
Below, the consumer which concerns on 1st Embodiment is demonstrated. FIG. 2 is a diagram illustrating details of the customer 10 according to the first embodiment.

  As shown in FIG. 2, the customer 10 includes a distribution board 110, a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, a hot water storage device 160, and an EMS 200.

  In the first embodiment, the customer 10 includes an ammeter 180, an ammeter 181, and an ammeter 182.

  The ammeter 180 is used for load following control of the fuel cell device 150. The ammeter 180 is downstream of the connection point between the storage battery device 140 and the power line (on the side away from the system) on the power line connecting each device (for example, the storage battery device 140 and the fuel cell device 150) and the system, and , Provided upstream of the connection point between the fuel cell device 150 and the power line (side closer to the system). Of course, the ammeter 180 is provided upstream of the connection point between the load 120 and the power line (on the side closer to the grid).

  The ammeter 181 is used for checking whether or not there is a flow of electric power (reverse power flow) from the storage battery device 140 to the system. The ammeter 181 is provided upstream (on the side closer to the system) from the connection point between the storage battery device 140 and the power line on the power line connecting each device (for example, the storage battery device 140) and the system.

  The ammeter 182 is used for measuring the electric power generated by the PV device 130. The ammeter 182 is provided closer to the PV device 130 than the connection point between the PV device 130 and the power line connecting each device (for example, the PV device 130) and the system.

  In the first embodiment, it should be noted that each device is connected to the power line in the order of the PV device 130, the storage battery device 140, the fuel cell device 150, and the load 120 when viewed from the order close to the system.

  Distribution board 110 is connected to distribution line 31 (system). Distribution board 110 is connected to load 120, PV device 130, storage battery device 140, and fuel cell device 150 via a power line.

  The load 120 is a device that consumes power supplied via a power line. For example, the load 120 includes devices such as a refrigerator, a freezer, lighting, and an air conditioner.

  The PV device 130 includes a PV 131 and a PCS 132. The PV 131 is an example of a power generation device, and is a solar power generation device that generates power in response to reception of sunlight. The PV 131 outputs the generated DC power. The amount of power generated by the PV 131 changes according to the amount of solar radiation applied to the PV 131. The PCS 132 is a device (Power Conditioning System) that converts DC power output from the PV 131 into AC power. The PCS 132 outputs AC power to the distribution board 110 via the power line.

  In the first embodiment, the PV device 130 may include a pyranometer that measures the amount of solar radiation irradiated on the PV 131.

  The PV device 130 is controlled by an MPPT (Maximum Power Point Tracking) method. Specifically, the PV device 130 optimizes the operating point (a point determined by the operating point voltage value and the power value, or a point determined by the operating point voltage value and the current value) of the PV 131.

  The storage battery device 140 includes a storage battery 141 and a PCS 142. The storage battery 141 is a device that stores electric power. The PCS 142 is a device (Power Conditioning System) that converts AC power supplied from the distribution line 31 (system) into DC power. Further, the PCS 142 converts DC power output from the storage battery 141 into AC power.

  Here, the storage battery device 140 operates according to any of a plurality of operation modes in which the storage battery 141 has different charging and discharging standards.

  The plurality of operation modes include an operation mode in a grid connection state and an operation mode in a self-sustaining operation state. The grid connection state is a state in which the storage battery device 140 and the grid are arranged in parallel. On the other hand, the autonomous operation state is a state in which the storage battery device 140 and the system are disconnected. As an example of the self-sustaining operation state, for example, a state in which a power failure has occurred can be considered.

  The operation mode in the grid connection state is (a) an operation mode that controls charging / discharging of the storage battery 141 so as to prioritize the power sale (reverse power flow) of the power generated by the PV device 130 (solar power purchase priority mode). ), (B) Operation mode (solar charging mode) for controlling charging / discharging of the storage battery 141 so that the power generated by the PV device 130 is charged in the storage battery 141, (c) Power supplied from the system is constant Operation mode (peak cut mode) for controlling charging / discharging of the storage battery 141 so as not to exceed the value, (d) Supplied from the system during a period when the unit price of power supplied from the system is lower than a threshold (for example, at night) Operation mode (midnight power utilization mode) for controlling charging / discharging of the storage battery 141 so as to charge the storage battery 141, (e) operation for forcibly storing power in the storage battery 141 Mode (forced power storage mode), and the like (f) operating mode that forcibly discharges the power stored in the battery 141 (forced discharge mode).

  Here, in (a) solar power purchase priority mode and (b) solar charge mode, the storage battery device 140 monitors the current measured by the ammeter 182 and depends on the amount of power generated by the PV device 130. It is necessary to control charging / discharging of the storage battery 141. Since the power generation amount of the PV device 130 changes from moment to moment, these operation modes are preferably controlled by the storage battery device 140.

  Similarly, in the (c) peak cut mode, the storage battery device 140 monitors the current measured by the ammeter 181 and the ammeter 182 and charges / discharges the storage battery 141 according to the amount of power supplied from the system. Need to control. The amount of power supplied from the grid is a value obtained by subtracting the power measured by the ammeter 182 from the power measured by the ammeter 181. Since the power generation amount of the PV device 130 and the power consumption of the load 120 change from moment to moment, this operation mode is preferably controlled by the storage battery device 140.

  In the first embodiment, (a) solar power purchase priority mode, (b) solar charge mode, and (c) peak cut mode are examples of operation modes in which the PV 131 and the storage battery 141 other than the storage battery 141 cooperate.

  The operation mode in the self-sustaining operation state includes (g) an operation mode for accumulating electric power generated by the PV device 130 (hereinafter referred to as self-sustained power storage mode), and (h) a load 120 connected to a self-sustained outlet provided in the storage battery device 140. (I) Supply power to the load 120 connected to an independent outlet provided in the storage battery device 140 while accumulating the power generated by the PV device 130 Operation mode (hereinafter referred to as “independent power storage mode”).

  Furthermore, as control common to all the operation modes, the storage battery device 140 monitors the current measured by the ammeter 181 so that the flow of electric power (reverse power flow) from the storage battery device 140 to the system does not occur. It is necessary to control charging / discharging of the storage battery 141. Since the power consumption of the load 120 changes from moment to moment, these operation modes are preferably controlled by the storage battery device 140.

  In the first embodiment, a message for designating one of a plurality of operation modes is defined between the EMS 200 and the storage battery device 140. Here, the message for specifying one of a plurality of operation modes includes the time to start operation in the specified operation mode, the time to end operation in the specified operation mode, and the time to operate in the specified operation mode. It is preferable to contain. For example, in the mode (d), it is necessary to specify a time such as when to start charging at midnight or when to start discharging in the daytime.

  The message designating one of the plurality of operation modes includes information indicating whether the designated operation mode is an operation mode in the grid connection state or whether the designated operation mode is an operation mode in the autonomous operation state. It is preferable.

  For example, the storage battery device 140 receives a message specifying any one of a plurality of operation modes from the EMS 200. The storage battery device 140 operates in one of a plurality of operation modes according to a message received from the EMS 200. Alternatively, the storage battery device 140 transmits a message designating any one of a plurality of operation modes to the EMS 200. The EMS 200 acquires which of the plurality of operation modes the EMS 200 is operating according to a message received from the storage battery device 140.

  In addition, the storage battery device 140 transmits a message indicating the presence or absence of a function for handling a message designating any of the plurality of operation modes to the EMS 200 prior to communication of a message designating any of the plurality of operation modes.

  In 1st Embodiment, the storage battery apparatus 140 transmits the message which shows the rated output of the storage battery 141 to EMS200. The message indicating the rated output of the storage battery 141 includes at least information indicating the rated output of the storage battery 141 in the autonomous operation state. The message indicating the rated output of the storage battery 141 may include information indicating the rated output of the storage battery 141 in the grid connection state. Here, when the EMS 200 controls other devices (for example, the fuel cell device 150 and the load 120), the rated output of the storage battery 141 in the self-sustaining operation state is important information for the EMS 200.

  Further, the storage battery device 140 transmits a message indicating the presence or absence of a function of transmitting a message indicating the rated output of the storage battery 141 to the EMS 200 prior to communication of a message indicating the rated output of the storage battery 141.

  In 1st Embodiment, the storage battery apparatus 140 transmits the message which shows the frequency | count of charging / discharging of the storage battery 141 to EMS200. The message indicating the number of times of charge / discharge of the storage battery 141 includes at least the number of times of charge / discharge of the storage battery 141 in the current state. The message indicating the number of charge / discharge cycles of the storage battery 141 may include the maximum number of charge / discharge cycles of the storage battery 141. Here, in determining the degree of deterioration of the storage battery 141, the number of times of charge / discharge of the storage battery 141 is important information for the EMS 200.

  Further, the storage battery device 140 transmits a message indicating the presence or absence of a function of transmitting a message indicating the number of times of charging / discharging of the storage battery 141 to the EMS 200 prior to communication of a message indicating the number of times of charging / discharging of the storage battery 141.

  In 1st Embodiment, PCS142 comprises the communication part which receives the message mentioned above from EMS200, or transmits to EMS200, for example. Or PCS142 comprises the control part which controls charge / discharge of storage battery 141 according to the operation mode of storage battery 141, for example. However, the communication unit and the control unit may be provided on a control board provided separately from the PCS 142.

  The fuel cell device 150 includes a fuel cell 151 and a PCS 152. The fuel cell 151 is an example of a power generation device, and is a device that generates electric power using fuel (gas). The PCS 152 is a device (Power Conditioning System) that converts DC power output from the fuel cell 151 into AC power.

  The fuel cell device 150 operates by load following control. Specifically, the fuel cell device 150 controls the fuel cell 151 so that the power output from the fuel cell 151 becomes the target power for load following control. In other words, the fuel cell device 150 controls the power output from the fuel cell 151 so that the current value detected by the ammeter 180 becomes the target received power.

  The hot water storage device 160 is a device that generates hot water or maintains the water temperature using fuel (gas). Specifically, the hot water storage device 160 has a hot water storage tank, and the water supplied from the hot water storage tank is generated by heat generated by combustion of fuel (gas) or exhaust heat generated by operation (power generation) of the fuel cell 151. warm. Specifically, the hot water storage device 160 warms the water supplied from the hot water storage tank and returns the heated hot water to the hot water storage tank.

  In the embodiment, it should be noted that the fuel cell device 150 and the hot water storage device 160 constitute a hot water supply unit 170 (hot water supply system).

  The EMS 200 is a device (Energy Management System) that controls the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160. Specifically, the EMS 200 is connected to the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160 via signal lines, and the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device. 160 is controlled. The EMS 200 controls the power consumption of the load 120 by controlling the operation mode of the load 120.

  The EMS 200 is connected to various servers via the network 60. Various servers store, for example, information (hereinafter referred to as energy charge information) such as the unit price of power supplied from the grid, the unit price of power received from the grid, and the unit price of fuel gas.

  Or various servers store the information (henceforth energy consumption prediction information) for predicting the power consumption of the load 120, for example. The energy consumption prediction information may be generated based on, for example, the past power consumption actual value of the load 120. Alternatively, the energy consumption prediction information may be a model of power consumption of the load 120.

  Or various servers store the information (henceforth PV power generation amount prediction information) for predicting the power generation amount of PV131, for example. The PV power generation prediction information may be a predicted value of the amount of solar radiation irradiated on the PV 131. Alternatively, the PV power generation prediction information may be weather forecast, season, sunshine time, and the like.

(Fuel cell device)
The fuel cell device according to the first embodiment will be described below. FIG. 3 is a diagram showing the fuel cell device 150 according to the first embodiment.

  As shown in FIG. 3, the fuel cell device 150 includes a fuel cell 151, a PCS 152, a blower 153, a desulfurizer 154, an ignition heater 155, and a control board 156.

  As described above, the fuel cell 151 is a device that outputs power using fuel gas. Specifically, the fuel cell 151 includes a reformer 151A and a cell stack 151B.

  The reformer 151A generates reformed gas from the fuel gas from which the odorant has been removed by the desulfurizer 154 described later. The reformed gas is a gas composed of hydrogen and carbon monoxide.

  The cell stack 151B generates power by a chemical reaction between air (oxygen) supplied from a blower 153, which will be described later, and the reformed gas. Specifically, the cell stack 151B has a structure in which a plurality of cells are stacked. Each cell has a structure in which an electrolyte is sandwiched between a fuel electrode and an air electrode. Reformed gas (hydrogen) is supplied to the fuel electrode, and air (oxygen) is supplied to the air electrode. A chemical reaction of the reformed gas (hydrogen) and air (oxygen) occurs in the electrolyte to generate electric power (DC electric power) and heat.

  As described above, the PCS 152 is a device that converts DC power output from the fuel cell 151 into AC power.

  The blower 153 supplies air to the fuel cell 151 (cell stack 151B). The blower 153 is configured by a fan, for example.

  The desulfurizer 154 removes the odorant contained in the fuel gas supplied from the outside. The fuel gas may be city gas or propane gas.

  The ignition heater 155 is a heater that ignites a fuel that has not chemically reacted in the cell stack 151B (hereinafter, unreacted fuel) and maintains the temperature of the cell stack 151B at a high temperature. That is, the ignition heater 155 ignites unreacted fuel leaking from the opening of each cell constituting the cell stack 151B. It should be noted that the ignition heater 155 may ignite the unreacted fuel in a case where the unreacted fuel is not combusted (for example, when the fuel cell device 150 is activated). Once ignited, thereafter, the unreacted fuel that overflows little by little from the cell stack 151B continues to burn, so that the temperature of the cell stack 151B is maintained at a high temperature.

  The control board 156 is a board on which a circuit for controlling the fuel cell 151, the PCS 152, the blower 153, the desulfurizer 154, the ignition heater 155, and the control board 156 is mounted.

  In the first embodiment, the cell stack 151B is an example of a power generation unit that generates power by a chemical reaction. The reformer 151A, the blower 153, the desulfurizer 154, the ignition heater 155, and the control board 156 are examples of auxiliary devices that assist the operation of the cell stack 151B. Further, a part of the PCS 152 may be handled as an auxiliary device.

(Network configuration)
In the following, a network configuration according to the first embodiment will be described. FIG. 4 is a diagram illustrating a network configuration according to the first embodiment.

  As shown in FIG. 4, the network includes a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, a hot water storage device 160, an EMS 200, and a user terminal 300. The user terminal 300 includes a user terminal 310 and a user terminal 320.

  The user terminal 310 is connected to the EMS 200, and information for visualizing the energy consumption of each device (load 120, PV device 130, storage battery device 140, fuel cell device 150, hot water storage device 160) (hereinafter, visualization information). Is displayed by a web browser. In such a case, the EMS 200 generates visualization information in a format such as HTML, and transmits the generated visualization information to the user terminal 310. The connection format between the user terminal 310 and the EMS 200 may be wired or wireless.

  The user terminal 320 is connected to the EMS 200 and displays visualization information by an application. In such a case, the EMS 200 transmits information indicating the energy consumption of each device to the user terminal 320. The application of the user terminal 320 generates visualization information based on information received from the EMS 200 and displays the generated visualization information. The connection format between the user terminal 320 and the EMS 200 may be wired or wireless.

  As described above, in the first embodiment, the fuel cell device 150 and the hot water storage device 160 constitute the hot water supply unit 170. Therefore, the hot water storage device 160 may not have a function of communicating with the EMS 200. In such a case, the fuel cell device 150 performs communication of messages regarding the hot water storage device 160 with the EMS 200 on behalf of the hot water storage device 160.

  In the first embodiment, communication between the EMS 200 and each device (the load 120, the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160) is performed by a method according to a predetermined protocol. Examples of the predetermined protocol include a protocol called “ECHONET Lite” or “ECHONET”. However, the embodiment is not limited to this, and the predetermined protocol may be a protocol other than “ECHONET Lite” and “ECHONET”.

(Configuration of EMS)
Hereinafter, the EMS according to the first embodiment will be described. FIG. 5 is a block diagram showing the EMS 200 according to the first embodiment.

  As illustrated in FIG. 5, the EMS 200 includes a reception unit 210, a transmission unit 220, and a control unit 230.

  The receiving unit 210 receives various signals from a device connected via a signal line. For example, the receiving unit 210 may receive information indicating the power generation amount of the PV 131 from the PV device 130. The receiving unit 210 may receive information indicating the storage amount of the storage battery 141 from the storage battery device 140. The receiving unit 210 may receive information indicating the power generation amount of the fuel cell 151 from the fuel cell device 150. The receiving unit 210 may receive information indicating the amount of hot water stored in the hot water storage device 160 from the hot water storage device 160.

  In the first embodiment, the reception unit 210 may receive energy charge information, energy consumption prediction information, and PV power generation amount prediction information from various servers via the network 60. However, the energy fee information, the energy consumption prediction information, and the PV power generation amount prediction information may be stored in the EMS 200 in advance.

  In 1st Embodiment, the receiving part 210 receives the message which designates either of the some operation mode from which the reference | standard of charging / discharging of the storage battery 141 differs, respectively from the storage battery apparatus 140 (for example, PCS142). Thereby, the receiving unit 210 acquires which of the plurality of operation modes the storage battery device 140 is operating. Or the receiving part 210 receives the message which shows the rated output of the storage battery 141 from the storage battery apparatus 140 (for example, PCS142). Alternatively, the receiving unit 210 receives a message indicating the cumulative number of charging / discharging times of the storage battery 141 from the storage battery device 140 (for example, the PCS 142). In other words, the PCS 142 of the storage battery device 140 constitutes a communication unit that transmits the above-described message.

  In the first embodiment, the reception unit 210 displays a message indicating the presence or absence of a function for handling a message designating one of a plurality of operation modes prior to communication of a message designating any of the plurality of operation modes. 140. Alternatively, the reception unit 210 receives a message indicating whether or not there is a function of transmitting a message indicating the rated output of the storage battery 141 from the storage battery device 140 prior to communication of a message indicating the rated output of the storage battery 141. Alternatively, the reception unit 210 receives from the storage battery device 140 a message indicating whether or not there is a function of transmitting a message indicating the number of times of charging / discharging of the storage battery 141 prior to communication of a message indicating the number of times of charging / discharging of the storage battery 141.

  The transmission unit 220 transmits various signals to a device connected via a signal line. For example, the transmission part 220 transmits the signal for controlling the PV apparatus 130, the storage battery apparatus 140, the fuel cell apparatus 150, and the hot water storage apparatus 160 to each apparatus. The transmission unit 220 transmits a control signal for controlling the load 120 to the load 120.

  In 1st Embodiment, the transmission part 220 transmits the message which designates either of several driving modes to the storage battery apparatus 140 (for example, PCS142). Thereby, the transmission unit 220 instructs the storage battery device 140 to set the operation mode of the storage battery 141. Or the transmission part 220 transmits the message which requests | requires the rated output of the storage battery 141 to the storage battery apparatus 140. FIG. Or the transmission part 220 transmits the message which requests | requires the charging / discharging frequency of the storage battery 141 to the storage battery apparatus 140. FIG.

  In the first embodiment, the transmission unit 220 requests a message indicating the presence / absence of a function for handling a message designating one of a plurality of operation modes prior to communication of a message designating one of the plurality of operation modes. A message is transmitted to the storage battery device 140. Or the transmission part 220 transmits the message which requests | requires the message which shows the presence or absence of the function which transmits the message which shows the rated output of the storage battery 141 to the storage battery apparatus 140 before communication of the message which shows the rated output of the storage battery 141. Alternatively, the transmission unit 220 transmits a message requesting a message indicating the presence or absence of a function of transmitting a message indicating the number of times of charging / discharging of the storage battery 141 prior to communication of a message indicating the number of times of charging / discharging of the storage battery 141 to the storage battery device 140. Send to.

  The control unit 230 controls the load 120, the PV device 130, the storage battery device 140, the fuel cell device 150, and the hot water storage device 160.

(Message format)
The message format according to the first embodiment will be described below. 6 to 8 are diagrams illustrating an example of a message format according to the first embodiment.

  1stly, the message which designates either of the some operation modes from which the reference | standard of charging / discharging of the storage battery 141 differs has the format shown in FIG. 6, for example. As shown in FIG. 6, the message has a message type field and an operation mode field.

  The message type field indicates the type of message. In the first embodiment, the message indicates that the message includes an operation mode.

  The operation mode field indicates the operation mode of the storage battery 141. As described above, the operation modes are (a) solar power purchase priority mode, (b) solar charge mode, (c) peak cut mode, (d) midnight power utilization mode, (e) forced power storage mode, ( f) forced discharge mode, (g) self-sustaining power storage mode, (h) self-sustaining supply mode, (i) self-sustaining power storage mode, and the like.

  Secondly, the message indicating the rated output of the storage battery 141 has, for example, the format shown in FIG. As shown in FIG. 7, the message has a message type field and a rated output field.

  The message type field indicates the message type. In the first embodiment, the message indicates that the message includes a rated output.

  The rated output field indicates the rated output of the storage battery 141. The rated output field includes at least information indicating the rated output of the storage battery 141 in the self-sustaining operation state. The field of the rated output may include information indicating the rated output of the storage battery 141 in the grid connection state.

  3rdly, the message which shows the charging / discharging frequency of the storage battery 141 has a format shown in FIG. 8, for example. As shown in FIG. 8, the message has a message type field and a charge / discharge number field.

  The message type field indicates the type of the message. In the first embodiment, the message indicates that the message includes the number of times of charging / discharging.

  The field of the rated output indicates the number of times of charging / discharging of the storage battery 141. The field of the number of times of charging / discharging includes at least the number of times of charging / discharging of the storage battery 141 in the current state. The field of the number of times of charging / discharging may include the maximum number of times of charging / discharging of the storage battery 141.

(Management method)
Hereinafter, a management method according to the first embodiment will be described. FIG. 9 is a sequence diagram illustrating the management method according to the first embodiment.

  As shown in FIG. 9, in step 10, the EMS 200 transmits a message (code group request) requesting a code group corresponding to the storage battery device 140 to the storage battery device 140. The code group request is an example of a message requesting a message indicating the presence / absence of a function for handling a message for designating any of a plurality of operation modes having different charging / discharging standards for the storage battery 141. Or a code group request | requirement is an example of the message which requests | requires the message which shows the presence or absence of the function which transmits the message which shows the rated output of the storage battery 141. FIG. Or a code group request | requirement is an example of the message which requests | requires the message which shows the presence or absence of the function which transmits the message which shows the charging / discharging frequency of the storage battery 141. FIG.

  In step 20, the storage battery device 140 transmits a message (code group response) indicating a code group corresponding to the storage battery device 140 to the EMS 200. The code group response is an example of a message indicating the presence / absence of a function for handling a message designating any of a plurality of operation modes having different charging / discharging standards of the storage battery 141. Or a code group response is an example of the message which shows the presence or absence of the function which transmits the message which shows the rated output of the storage battery 141. FIG. Or a code request | requirement is an example of the message which shows the presence or absence of the function which transmits the message which shows the charging / discharging frequency (charge / discharge cumulative frequency) of the storage battery 141. FIG.

  In step 30, the EMS 200 transmits a message designating any one of a plurality of operation modes having different charging / discharging standards for the storage battery 141 to the storage battery device 140. When the storage battery device 140 receives the message, the storage battery device 140 determines the mode designated from the message, and switches its state to the designated mode. As a result, the EMS 200 instructs the operation mode of the storage battery 141 to the storage battery device 140. Further, the storage battery device 140 may reply to the EMS 200 that the mode switching instruction has been accepted or the mode switching has been completed.

  After a while, in step 40, the EMS 200 transmits a message (operation mode request) requesting notification of the operation mode of the storage battery 141 to the storage battery device 140.

  In step 50, the storage battery device 140 transmits a message (operation mode response) indicating the operation mode of the storage battery 141 to the EMS 200 as a response to the request.

  In step 60, the EMS 200 transmits a message (rated output request) requesting notification of the rated output of the storage battery 141 to the storage battery device 140.

  In step 70, the storage battery device 140 transmits a message (rated output response) indicating the rated output of the storage battery 141 to the EMS 200. Here, the response of the rated output is configured to include information on the output corresponding to the current state of grid connection or independence, even if both the rated output and the output at the time of autonomous operation are included. You may do it.

  In step 80, the EMS 200 transmits a message (charge / discharge count request) requesting the storage battery device 140 to notify the charge / discharge count of the storage battery 141.

  In step 90, the storage battery device 140 transmits a message (charge / discharge count response) indicating the cumulative number of charge / discharge cycles of the storage battery 141 to the EMS 200.

  As described above, in the first embodiment, the charge / discharge control of the storage battery 141 according to the operation mode of the storage battery 141 is left to the storage battery device 140, and any of a plurality of operation modes with different charge / discharge criteria for the storage battery 141 is provided. A message that specifies whether is defined. Accordingly, the EMS 200 can appropriately control the storage battery device 140 without being affected by the communication delay between the EMS 200 and the storage battery device 140. Moreover, EMS200 can grasp | ascertain the electric power generation amount etc. of the storage battery apparatus 140, and can control other apparatuses (a load, a fuel cell apparatus, etc.) appropriately.

  In the first embodiment, the EMS 200 appropriately controls other devices (load, fuel cell device) in the autonomous operation state by receiving a message indicating the rated output of the storage battery 141 in the autonomous operation state from the storage battery device 140. can do. Or EMS200 can judge the deterioration degree of the storage battery 141 by receiving the message which shows the charging / discharging frequency of the storage battery 141 from the storage battery apparatus 140. FIG. Specifically, in the case of a battery such as a lithium ion battery having a relatively strong relationship between the number of charge / discharge cycles and the degree of deterioration, it can be calculated to some extent.

[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.

  For example, the system is operated in the idling mode during a system power failure. However, if there is a power demand at the load, not only the power supply for the auxiliary device is performed by the fuel cell 151 itself but also the fuel cell device 150 is connected. Alternatively, the self-sustained operation mode may be employed in which the output of the fuel cell 151 is increased so that the output power corresponding to the demand at the load is obtained. That is, the self-sustained operation mode and the idling mode are different in that whether or not the generated power is output externally, but are common in that the power supply to the auxiliary equipment is covered by self-power generation during a system power failure. For this reason, the two modes in which power is supplied to the auxiliary device by self-power generation during a system power failure may be referred to as a self-sufficiency mode for convenience.

  Further, in the temperature maintenance mode, the power consumption of the auxiliary devices is covered by the power supply from the system, but it may be covered by the output of the PV device 130 or the storage battery device 140.

  The EMS 200 may be a HEMS (Home Energy Management System), a SEMS (Store Energy Management System), a BEMS (Building Energy Management System), or an FEM. There may be.

  In the embodiment, the customer 10 includes a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, and a hot water storage device 160. However, the consumer 10 should just have the storage battery apparatus 140 at least.

  In the embodiment, (a) solar power purchase priority mode, (b) solar charge mode, and (c) peak cut mode are illustrated as operation modes in which the storage battery 141 cooperates with other devices other than the storage battery 141. However, the embodiment is not limited to this. For example, the operation mode of the storage battery 141 may include an operation mode in which the load 120, the fuel cell device 150 or the hot water storage device 160, and the storage battery 141 cooperate.

  Although not particularly mentioned in the embodiment, timing for initial setting of the storage battery device 140, timing for recovery from a power failure, timing for turning on the power of the storage battery device 140, timing for turning on the power of the EMS 200, setting of the storage battery device 140 It is preferable that transmission / reception of a code group request and a code group response is performed at a timing when it is necessary to check the code group.

  Although not particularly mentioned in the embodiment, a message indicating the status of the storage battery 141 is preferably defined between the EMS 200 and the storage battery device 140. The message indicating the operation mode of the storage battery 141 and the message indicating the charge / discharge count of the storage battery 141 are examples of a message indicating the status of the storage battery 141.

  Although not particularly mentioned in the embodiment, a message indicating the specifications of the storage battery 141 is preferably defined between the EMS 200 and the storage battery device 140. The message indicating the output rating of the storage battery 141 is an example of a message indicating the specifications of the storage battery 141.

  Although not particularly mentioned in the embodiment, the storage battery device 140 may autonomously transmit various messages to the EMS 200 instead of a request from the EMS 200. For example, the storage battery device 140 transmits various messages to the EMS 200 when a predetermined condition is satisfied.

  Although not specifically mentioned in the embodiment, the storage battery device 140 includes a message indicating the specifications of the storage battery 141 (for example, a message indicating the output rating of the storage battery 141) and a message indicating the status of the storage battery 141 together with the code group response. You may transmit to EMS200.

  DESCRIPTION OF SYMBOLS 10 ... Consumer, 20 ... CEMS, 30 ... Substation, 31 ... Distribution line, 40 ... Smart server, 50 ... Power plant, 51 ... Transmission line, 60 ... Network, 100 ... Energy management system, 110 ... Distribution board, 120 ... Load, 130 ... PV device, 131 ... PV, 132 ... PCS, 140 ... Storage battery device, 141 ... Storage battery, 142 ... PCS, 150 ... Fuel cell device, 151 ... Fuel cell, 151A ... Reformer, 151B ... Cell Stack, 152 ... PCS, 153 ... Blower, 154 ... Desulfurizer, 155 ... Ignition heater, 156 ... Control board, 160 ... Hot water storage device, 170 ... Hot water supply device, 180, 181, 182 ... Ammeter, 200 ... EMS, 210 ... Receiving unit, 220 ... transmitting unit, 230 ... control unit, 300, 310, 320 ... user terminal

Claims (9)

A management system having a storage battery device and a control device that communicates with the storage battery device using a predetermined protocol,
The control device transmits a code group request for requesting a code group corresponding to the storage battery device to the storage battery device,
In response to the code group request, the storage battery device transmits a code group response in which the storage battery device responds to a corresponding code group,
The control device transmits a setting message instructing setting of an operation mode of the storage battery device included in the code group response to the storage battery device,
The control device transmits a request message for requesting notification of an operation mode of the storage battery device to the storage battery device after transmission of the setting message ,
The said storage battery apparatus transmits the response message which shows the operation mode of the said storage battery apparatus with respect to the said control apparatus according to the said request message . The management system according to claim 1, wherein the operation mode of the storage battery device includes an operation mode in which a distributed power source other than the storage battery device and the storage battery device cooperate with each other. The management system according to claim 2, wherein the distributed power source other than the storage battery device is a solar battery. The operating mode of the storage battery device, the management system according to any one of claims 1 to 3, characterized in that a mode to discharge mode or the storage battery device to charge the storage battery device. The control device transmits the code group request to the storage battery device after detecting a predetermined trigger,
The predetermined trigger includes a timing for initial setting of the storage battery device, a timing for recovery from a power failure, a timing for turning on the power of the storage battery device, a timing for turning on the power of the control device, and a setting of the storage battery device. The management system according to any one of claims 1 to 4, wherein the management system is at least one of timings at which confirmation is required.   The storage battery device transmits the code group response to the control device, and transmits at least one of a message indicating a specification of the storage battery device and a message indicating a status of the storage battery device. The management system according to any one of claims 1 to 5. A management method used in a management system having a storage battery device and a control device that communicates with the storage battery device,
Transmitting a code group request for requesting a code group corresponding to the storage battery device from the control device to the storage battery device;
In response to the code group request from the storage battery device to the control device, a step of transmitting a code group response in which the storage battery device responds to a corresponding code group;
Transmitting a setting message instructing setting of an operation mode of the storage battery device included in the code group response from the control device to the storage battery device;
After transmitting the setting message, transmitting a request message for requesting notification of an operation mode of the storage battery device from the control device to the storage battery device;
And a step of transmitting a response message indicating an operation mode of the storage battery device in response to the request message from the storage battery device to the control device. A control device that communicates with a storage battery device,
A communication unit that transmits a code group request for requesting a code group corresponding to the storage battery device to the storage battery device;
In response to the code group request, the communication unit receives a code group response in which the storage battery device responds to a corresponding code group from the storage battery device,
The communication unit transmits a setting message instructing setting of an operation mode of the storage battery device included in the code group response to the storage battery device,
The communication unit transmits a request message for requesting notification of an operation mode of the storage battery device to the storage battery device after transmission of the setting message ,
The said communication part receives the response message which shows the operation mode of the said storage battery apparatus from the said storage battery apparatus as a message transmitted according to the said request message, The control apparatus characterized by the above-mentioned. A storage battery device that communicates with a control device,
A communication unit that receives a code group request for requesting a code group corresponding to the storage battery device from the control device;
In response to the code group request, the communication unit transmits a code group response in which the storage battery device responds to a corresponding code group to the control device,
The communication unit receives a setting message for instructing setting of an operation mode of the storage battery device included in the code group response from the control device,
The communication unit receives a request message for requesting notification of an operation mode of the storage battery device from the control device after receiving the setting message ,
The said communication part transmits the response message which shows the operation mode of the said storage battery apparatus to the said control apparatus according to the said request message, The storage battery apparatus characterized by the above-mentioned.

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