CN107404128B

CN107404128B - Management system, management method, control device, and power storage device

Info

Publication number: CN107404128B
Application number: CN201710754175.5A
Authority: CN
Inventors: 中村一尊
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2012-08-06
Filing date: 2013-08-05
Publication date: 2020-06-09
Anticipated expiration: 2033-08-05
Also published as: CN107404128A

Abstract

Disclosed are a management system, a management method, a control device, and a power storage device, wherein a message specifying any one of a plurality of operation modes is defined between an EMS (200) and the power storage device (140).

Description

Management system, management method, control device, and power storage device

Technical Field

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

Background

In recent years, a power management system having a plurality of devices and a control apparatus that controls the plurality of devices has been proposed (for example, patent document 1). The plurality of devices include, for example, household appliances (e.g., air conditioners and lighting devices) and distributed power sources (e.g., photovoltaic cells, storage batteries, and fuel power generation devices). The control devices are called, for example, HEMS (Home Energy Management System), SEMS (storage Energy Management System), BEMS (Building Energy Management System), FEMS (factory Energy Management System), and CEMS (Cluster/Community Energy Management System).

In order to spread the management system described above, the common use of message formats between a plurality of devices and a control apparatus is effective, and such common use of message formats is tested.

Documents of the prior art

Patent document

Patent document 1: japanese patent publication No. 2010-128810

Disclosure of Invention

The commonalization of the above message formats has just started, and various studies on message formats for appropriately controlling devices are required.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a management system, a management method, a control device, and a power storage device capable of appropriately controlling an apparatus.

The management system according to the first feature includes: a power storage device and a control device, wherein the power control device includes a battery that accumulates power, the control device being in communication with the power storage device. A message specifying any one of a plurality of operation modes, each having a different standard of charging and discharging of the storage battery, is defined between the control device and the electric power storage device.

In the first feature, the control means indicates the operation mode of the storage battery to the power storage means by transmitting a message specifying any one of the plurality of operation modes to the power storage means.

In the first feature, the control means acquires information on which of the plurality of operation modes the power storage device operates by receiving a message from the power storage device that specifies any one of the plurality of operation modes.

In the first feature, before transmitting the message specifying any one of the plurality of operation modes, the control device receives, from the power storage device, a message indicating that there is a function of processing the message specifying any one of the plurality of operation modes.

In the first feature, the plurality of operation modes include an operation mode in which the storage battery cooperates with the distributed power supply other than the storage battery.

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

The management method for use in a management system according to the second feature, wherein the management system includes a power storage device including a storage battery that accumulates power, and a control device that communicates with the power storage device. A message specifying any one of a plurality of operation modes, each having a different standard of charging and discharging of the storage battery, is defined between the control device and the electric power storage device. The management method comprises the following steps: a step of transmitting a message specifying any one of the plurality of operation modes from the control device to the power storage device, or a step of transmitting a message specifying any one of the plurality of operation modes from the power storage device to the control device.

According to the control device that communicates with the power storage device of the third feature, the power storage device includes the storage battery that stores electric power. A message specifying any one of a plurality of operation modes, each having a different standard of charging and discharging of the storage battery, is defined between the control device and the electric power storage device. The control device includes a communication unit that receives a message specifying any one of the plurality of operation modes from the power storage device or transmits a message specifying any one of the plurality of operation modes to the power storage device.

The power storage device according to the fourth feature includes a battery that stores electric power. A message specifying any one of a plurality of operation modes, each having a different standard of charging and discharging of the storage battery, is defined between the control device in communication with the power storage device and the power storage device. The power storage device includes a communication unit that transmits or receives a message specifying any one of the plurality of operation modes to or from the control device.

According to the present invention, a management system, a management method, a control device, and a power storage device capable of appropriately controlling an apparatus can be provided.

Drawings

Fig. 1 is a diagram showing an energy management system 100 according to a first embodiment.

Fig. 2 is a diagram showing a consumer appliance 10 according to a first embodiment.

Fig. 3 is a diagram showing a fuel cell apparatus 150 according to a first embodiment.

Fig. 4 is a diagram showing a network configuration according to the first embodiment.

Fig. 5 is a diagram illustrating the EMS200 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 showing a management method according to the first embodiment.

Detailed Description

Hereinafter, a management system according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following drawings, the same or similar components are denoted by the same or similar reference numerals.

It is to be understood that the figures are merely schematic and are not drawn to scale. Therefore, specific dimensions should be determined with reference to the following description. It goes without saying that different dimensional relationships and dimensional ratios can be contained in different figures.

[ summary of embodiments ]

The management system according to an embodiment includes: a power storage device including a battery that stores power; and a control device in communication with the power storage device. A message specifying any one of a plurality of operation modes is defined between the control device and the electric power storage device, wherein each operation mode has a different standard of charging and discharging the storage battery.

Here, there is a case where a plurality of operation modes each having a different standard of charging and discharging the battery are provided as the operation modes of the battery. In this case, when the control device controls the charge and discharge of the storage battery according to the operation mode of the storage battery, it may not be able to appropriately control the power storage device due to a communication delay between the control device and the power storage device.

In an embodiment, such a message is defined: it is instructed to the power storage device to perform charge and discharge control of the storage battery according to an operation mode of the storage battery, and any one of a plurality of operation modes is simultaneously specified, wherein each operation mode has a different standard of charge and discharge of the storage battery. Therefore, 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. Further, the control device may recognize, for example, the amount of electric power generated in the electric power storage device, and thus may appropriately control other devices (e.g., a load and a fuel cell device).

[ first embodiment ]

(energy management system)

An energy management system according to a first embodiment will be described below. Fig. 1 shows an energy management system 100 according to a first embodiment.

As shown in fig. 1, the energy management system 100 includes a consumer facility 10, a CEMS20, a substation 30, an intelligent server 40, and a power plant 50. It should be noted that the consumer facility 10, the CEMS20, the substation 30 and the intelligent server 40 are connected by a network 60.

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

The consumer facility 10 may be a free standing residence, or a residential cell such as an apartment house. Alternatively, the consumer facility may be a store, such as a small street shop or supermarket. It should be noted that the consumer facility 10 may also be a commercial facility, such as an office building, or a factory.

In the first embodiment, the consumer facility group 10A and the consumer facility group 10B are configured by a plurality of consumer facilities 10. The consumer facility group 10A and the consumer facility group 10B are classified according to geographical regions, for example.

The CEMS20 controls the interconnection between multiple consumer facilities 10 and the power system. It should be noted that since the CEMS20 manages a plurality of consumer facilities 10, the CEMS20 may also be referred to as CEMS (cluster/community energy management system). In particular, the CEMS20 disconnects between multiple consumer facilities 10 and the power system in the event of a power outage or the like. On the other hand, the CEMS20 interconnects a plurality of consumer facilities 10 with the power system, for example, in the case of restoring power.

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

The substation 30 supplies power to a plurality of consumer facilities 10 through a distribution line 31. Specifically, the substation 30 lowers the voltage supplied from the power station 50.

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

The intelligent server 40 manages a plurality of CEMSs 20 (here, CEMS 20A and CEMS 20B). Also, the smart server 40 manages a plurality of substations 30 (here, the substation 30A and the substation 30B). In other words, the smart server 40 integrally manages the consumer appliances 10 included in the

consumer appliance groups

10A and 10B. For example, the smart server 40 has a function of balancing the electric power to be supplied to the consumer facility group 10A and the electric power to be supplied to the consumer facility group 10B.

The power plant 50 generates electricity by thermal power, solar power, wind power, hydraulic power, nuclear power, or the like. The power plant 50 supplies electric power to a plurality of substations 30 (here, the substation 30A and the substation 30B) through a feeder line 51.

The network 60 is connected to each device through a signal line. The network 60 is, for example, the internet, a wide area network, a narrow area network, and a mobile phone network.

(Consumer facility)

A consumer appliance according to the first embodiment will be described below. Fig. 2 shows details of a consumer facility according to the first embodiment.

As shown in fig. 2, the consumer facility 10 includes a power distribution panel 110, a load 120, a PV device 130, a battery device 140, a fuel cell device 150, a hot water storage device 160, and an EMS 200.

In a first embodiment, the consumer appliance 10 includes an ammeter 180, an ammeter 181, and an ammeter 182.

The ammeter 180 is used for load tracking control of the fuel cell apparatus 150. The ammeter 180 is provided on the power line connecting each device (for example, the battery device 140 and the fuel cell device 150) and the power grid downstream (on the side away from the power grid) of the connection point between the battery device 140 and the power line and upstream (on the side close to the power grid) of the connection point between the fuel cell device 150 and the power line. It is apparent that the ammeter 180 is provided upstream (on the side close to the grid) of the connection point between the load 120 and the power line.

The ammeter 181 is used to check the presence of a power flow (reverse power flow) from the storage battery device 140 to the grid. The ammeter 181 is provided upstream (on the side close to the grid) of the connection point between the storage battery device 140 and the power line on the power line connecting each apparatus (for example, the storage battery device 140) and the grid.

The ammeter 182 is used to measure the power generated by the PV device 130. The ammeter 182 is disposed on one side of the PV device 130 from a connection point between a power line connecting each apparatus (e.g., the PV device 130) and the power grid and the PV device 130.

It should be noted that in the first embodiment, each apparatus 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 (in the order close to the grid). However, the fuel cell device 150 and the storage battery device 140 may be connected in reverse order.

The distribution board 110 is connected to the distribution line 31 (grid). The distribution board 110 is connected to the load 120, the PV device 130, the battery device 140, and the fuel cell device 150 through power lines.

The load 120 is a device that consumes power supplied through the power line. The load 120 is, for example, a device including a refrigerator, a freezer, a lighting apparatus, an air conditioning apparatus, and the like.

The PV device 130 includes a PV 131 and a PCS 132. The PV 131 is an example of a power generation apparatus, and is a solar power generation apparatus (photovoltaic device) that generates power in response to received solar energy. The PV 131 outputs the generated dc power. The amount of power generated by the PV 131 varies according to the amount of solar radiation entering 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 through the power line.

In a first embodiment, the PV device 130 may include a solar intensity meter that measures solar radiation entering 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 of the PV 131 (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).

The battery device 140 includes a battery 141 and a PCS 142. The battery 141 is a device that stores electric power. The PCS142 is a device (power conditioning system) that converts ac power supplied from the distribution line 31 (grid) into dc power. The PCS142 converts the dc power output from the battery 141 into ac power.

The fuel cell device 150 includes a fuel cell 151 and a PCS 152. The fuel cell 151 is an example of an electric power generating device, and is a device that generates electric power by 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 electric power output from the fuel cell 151 reaches the target electric power for the load following control. In other words, the fuel cell device 150 controls the electric power output from the fuel cell 151 so that the product of the current value detected by the ammeter 180 and the power value detected by the PCS 152 becomes the target received power.

The hot water storage device 160 is a device that generates hot water or maintains the temperature of water using fuel (gas). Specifically, the hot water storage device 160 includes a hot water storage tank in which water supplied from the hot water storage tank is warmed by heat generated by burning fuel (gas) or heat discharged by the operation (generation of electric power) of the fuel cell 151. Specifically, the hot water storage device 160 warms water supplied from the hot water storage tank and feeds the warmed water back to the hot water storage tank.

Note that, in this embodiment, the fuel cell device 150 and the hot water storage device 160 constitute a hot water supply unit 170 (hot water supply system).

The EMS200 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 EMS200 is connected to the PV device 130, the accumulator device 140, the fuel cell device 150, and the hot water storage device 160 through signal lines and controls the PV device 130, the accumulator device 140, the fuel cell device 150, and the hot water storage device 160. In addition, the EMS200 controls the operation mode of the load 120 to control power consumption of the load 120.

In addition, the EMS200 is connected to various servers through the network 60. The various servers store information (hereinafter, energy price information) such as a purchase unit price of electric power supplied from the grid, a sale unit price of electric power supplied from the grid, and a purchase unit price of fuel.

Alternatively, the various servers store information for predicting, for example, the power consumption of the load 120 (hereinafter, energy consumption prediction information). The energy consumption prediction information may be generated, for example, based on the actual values of power consumption by the load 120 in the past. Alternatively, the energy consumption prediction information may be a pattern of power consumption of the load 120.

Alternatively, the various servers store, for example, information for predicting the amount of power generated by the PV 131 (hereinafter, PV power generation amount prediction information). The PV power generation amount prediction information may be a prediction value of solar radiation entering the PV 131. Alternatively, the PV power generation amount prediction information may be, for example, a weather forecast, a season, a sunshine time, and the like.

(operation mode of accumulator device)

Battery device 140 operates according to any of a plurality of operating modes, each operating mode having different criteria for charging and discharging battery 141.

The plurality of operation modes includes an operation mode in a grid-connected state and an operation mode in a self-sufficient operation state. The grid connection state is a state in which the storage battery device 140 is connected in parallel with the grid. On the other hand, the autonomous operation state is a state in which the accumulator unit 140 is disconnected from the grid. Examples of the self-sufficient operation state may include a state in which a power failure occurs, for example.

The operation modes in the grid-connected state include, for example: (a) an operation mode (solar power selling priority mode) in which charging and discharging of the storage battery 141 is controlled so that selling of electric power (reverse power flow) generated by the PV device 130 is prioritized, (b) an operation mode (solar charging mode) in which charging and discharging of the storage battery 141 is controlled so that the storage battery 141 is charged with electric power generated by the PV device 130, (c) an operation mode (peak cut mode) in which charging and discharging of the storage battery 141 is controlled so that electric power supplied from the grid does not exceed a fixed value, (d) an operation mode (midnight power utilization mode) in which charging and discharging of the storage battery 141 is controlled so that the storage battery 141 is charged with electric power supplied from the grid during a period in which the unit price of electric power supplied from the grid is lower than a threshold value (for example, at night), (e) an operation mode (forced power storage mode) in which electric power is forcibly stored in the storage battery 141, And (f) an operation mode in which the electric power stored in the storage battery 141 is forcibly discharged (forced discharge mode).

Here, in (a) the solar power selling priority mode and (b) the solar charging mode, the storage battery device 140 must monitor the current measured by the ammeter 182 and then control the storage battery 141 to be charged and discharged according to the amount of power generated by the PV device 130. These operating modes are preferably controlled by the storage battery device 140, as the amount of power generated by the PV device 130 varies over time.

Similarly, in the (c) peak reduction mode, the storage battery device 140 must monitor the currents measured by the

ammeters

181 and 182, and then control the storage battery 141 to be charged and discharged according to the amount of power supplied from the grid. 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. This mode of operation is preferably controlled by the battery device 140, since the amount of power generated by the PV device 130 and the power consumption of the load 120 change over time.

In the first embodiment, (a) the solar power selling priority mode, (b) the solar charging mode, and (c) the peak reduction mode are examples of the operation modes in which the PV 131 (distributed power source other than the storage battery 141) cooperates with the storage battery 141.

The operation modes in the self-sufficient operation state include, for example: (g) an operation mode (hereinafter, a self-contained power storage mode) in which power generated by the PV device 130 is accumulated, (h) an operation mode (hereinafter, a self-contained supply mode) in which power is supplied to the load 120 connected to the self-contained outlet provided in the storage battery device 140, and (i) an operation mode (hereinafter, a self-contained power storage and supply mode) in which power is supplied to the load 120 connected to the self-contained outlet provided in the storage battery device 140 and power generated by the PV device 130 is accumulated at the same time.

Further, as a control common to all the operation modes, the storage battery device 140 must monitor the current measured by the ammeter 181 and control the charging and discharging of the storage battery 141 so that the current does not flow from the storage battery device 140 to the grid (reverse power flow). These operating modes are preferably controlled by the accumulator means 140, since the power consumption of the load 120 changes from time to time.

(Fuel cell apparatus)

Hereinafter, a fuel cell apparatus according to a first embodiment will be described. Fig. 3 shows a fuel cell apparatus 150 according to a 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.

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

The reformer 151A generates a reformed gas from the fuel gas obtained by removing the odorant by the desulfurization device 154 described later. The reformed gas includes hydrogen and carbon monoxide.

The cell stack 151B generates electric power under a chemical reaction between air (oxygen) supplied from a blower 153 described later and the reformed gas. Specifically, the cell stack 151B has a structure obtained by stacking a plurality of cells. Each cell has a structure in which an electrolyte is sandwiched between a fuel electrode and an air electrode. The fuel electrode is supplied with the reformed gas (hydrogen gas), and the air electrode is supplied with air (oxygen gas). In the electrolyte, a chemical reaction occurs between the reformed gas (hydrogen) and air (oxygen), thereby generating electricity (direct current power) and heat.

The PCS 152 is a device that converts the dc power output from the fuel cell 151 into ac power as described above.

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

The desulfurization unit 154 removes an odorant contained in fuel supplied from the outside. The fuel may be a city fuel gas or a propane gas.

The ignition heater 155 ignites fuel that does not undergo a chemical reaction in the cell stack 151B (hereinafter, referred to as unreacted fuel), and maintains the temperature of the cell stack 151B at a high temperature. In other words, the ignition heater 155 ignites the unreacted fuel leaked from the opening of each cell constituting the cell stack 151B. It should be noted that the ignition heater 155 may be sufficient to ignite the unreacted fuel without the unreacted fuel burning (e.g., when the fuel cell apparatus 150 is turned on). In this way, once ignited, while the unreacted fuel gradually leaking out of the stack 151B keeps burning, the temperature of the stack 151B is kept high.

The control board 156 is a board mounted with circuits that control the fuel cell 151, the PCS 152, the blower 153, the desulfurizer 154, and the ignition heater 155.

In the first embodiment, the cell stack 151B is an example of a power generation unit that generates electric 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 support the operation of the cell stack 151B. Further, a portion of the PCS 152 may operate as an auxiliary device.

(network configuration)

Hereinafter, a network configuration according to the first embodiment will be described. Fig. 4 shows a network configuration according to the first embodiment.

As shown in fig. 4, the network is configured by a load 120, a PV device 130, a storage battery device 140, a fuel cell device 150, a hot water storage device 160, an EMS200, 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 EMS200, and displays information (hereinafter, visualized information) for visualizing energy consumption of 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) through a web browser. In this case, the EMS200 generates the visualization information in the HTML format or the like, and transmits the generated visualization information to the user terminal 310. The connection between the user terminal 310 and the EMS200 may be wired or may be wireless.

The user terminal 320 is connected to the EMS200 and displays visual information through an application. In this case, the EMS200 transmits information showing the energy consumption of each device to the user terminal 320. The application of the user terminal 320 generates the visualization information based on the information received from the EMS200 and displays the generated visualization information. The connection between the user terminal 320 and the EMS200 may be wired or may be 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 does not necessarily need to have a function of communicating with the EMS 200. In this case, the fuel cell device 150 replaces the hot water storage device 160 and transmits a message related to the hot water storage device 160 with the EMS 200.

In the first embodiment, communication between the EMS200 and each apparatus (the load 120, the PV device 130, the accumulator device 140, the fuel cell device 150, and the hot water storage device 160) is performed by a method performed according to a predetermined protocol. The predetermined protocol may be, for example, protocols known as "ECHONET Lite" and "ECHONET". However, the embodiment is not limited to these protocols, and the predetermined protocol may be a protocol other than "ECHONET Lite" or "ECHONET" (for example, ZigBee (registered trademark) or the like).

(configuration of EMS)

Hereinafter, the EMS according to the first embodiment will be described. Fig. 5 is a block diagram illustrating the EMS200 according to the first embodiment.

As shown in fig. 5, the EMS200 has a receiving unit 210, a transmitting unit 220, and a control unit 230.

The receiving unit 210 receives various signals from devices connected through signal lines. For example, the receiving unit 210 may receive information from the PV device 130 indicating the amount of power generated by the PV 131. The receiving unit 210 may receive information indicating the amount of power stored in the storage battery 141 from the storage battery device 140. The receiving unit 210 may receive information indicating the amount of power generated by 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. The receiving unit 210 and the transmitting unit 220 described below constitute a communication unit.

In the first embodiment, the receiving unit 210 may receive energy charge information, energy consumption prediction information, and PV power generation amount prediction information from various servers through the network 60. However, the energy cost information, the energy consumption prediction information, and the PV power generation amount prediction information may be stored in the EMS200 in advance.

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

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

(transmitting and receiving messages)

In the first embodiment, a message specifying any one of a plurality of operation modes between the EMS200 and the secondary battery device 140 is defined. Here, the message specifying any one of the plurality of operation modes preferably includes a time at which the operation in the specified operation mode starts, a time at which the operation in the specified operation mode ends, and a time period during which the operation in the specified operation mode is performed. For example, in the midnight electricity usage mode described above, it is necessary to specify a time at which charging is started at midnight and a time at which discharging is started during the daytime.

The message specifying any one of the plurality of operation modes preferably includes information indicating whether the specified operation mode is an operation mode of a grid-connected state or an operation mode of a self-sufficient operation state.

For example, the secondary battery device 140 receives a message from the EMS200 specifying any one of a plurality of operation modes. According to the message received from the EMS200, the secondary battery device 140 operates in any one of a plurality of operation modes. Alternatively, the secondary battery device 140 transmits a message specifying any one of a plurality of operation modes to the EMS 200. In accordance with the message received from the secondary battery device 140, the EMS200 acquires information about which of a plurality of operation modes the secondary battery device 140 operates in.

Further, before transmitting the message specifying any one of the plurality of operation modes, the secondary battery device 140 transmits a message indicating that there is a function of processing the message specifying any one of the plurality of operation modes to the EMS 200.

In the first embodiment, the storage battery device 140 transmits a message indicating the rated output of the storage battery 141 to the EMS 200. 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 storage battery 141 in a grid-connected state. Here, the rated output of the secondary battery 141 in the self-sufficient operation state is important information for the EMS200 to cause the EMS200 to control other devices (e.g., the fuel cell apparatus 150 or the load 120).

Further, before transmitting the message indicating the rated output of the secondary battery 141, the secondary battery device 140 transmits a message indicating that there is a function of transmitting the message indicating the rated output of the secondary battery 141 to the EMS 200.

In the first embodiment, the storage battery device 140 transmits a message indicating the number of charges and discharges of the storage battery 141 to the EMS 200. The message indicating the number of times of charging and discharging of the secondary battery 141 includes at least the number of times of charging and discharging of the secondary battery 141 in the current state. The message indicating the number of charges and discharges of the secondary battery 141 may include the maximum number of charges and discharges of the secondary battery 141. Here, the number of times of charging and discharging of the secondary battery 141 is important information for the EMS200 to determine the degree of degradation of the secondary battery 141.

Further, before transmitting the message indicating the number of times of charging and discharging of the secondary battery 141, the secondary battery device 140 transmits a message indicating that there is a function of transmitting the message indicating the number of times of charging and discharging of the secondary battery 141 to the EMS 200.

In the first embodiment, the PCS142 constitutes, for example, a communication unit that receives the above-described message from the EMS200 or transmits the message to the EMS 200. Alternatively, the PCS142 constitutes, for example, a control unit that controls charging and discharging of the storage battery 141 according to the operation mode of the storage battery 141. However, the communication unit and the control unit may be provided in a control board disposed separately from the PCS 142.

In the first embodiment, the EMS200 (the receiving unit 210) receives a message specifying any one of a plurality of operation modes, each having different standards for charging and discharging the secondary battery 141, from the secondary battery device 140 (e.g., the PCS 142). Therefore, the EMS200 (the receiving unit 210) acquires information about which of the plurality of operation modes the secondary battery device 140 operates in. Alternatively, the EMS200 (receiving unit 210) receives a message indicating the rated output of the secondary battery 141 from the secondary battery device 140 (e.g., the PCS 142). Alternatively, the EMS200 (receiving unit 210) receives a message indicating the accumulated number of charges and discharges of the secondary battery 141 from the secondary battery device 140 (e.g., the PCS 142). In other words, the PCS142 of the storage battery device 140 constitutes a communication unit that transmits the above-described message.

In the first embodiment, before transmitting a message indicating any one of a plurality of operation modes, the EMS200 (the receiving unit 210) receives a message indicating that there is a function of processing a message specifying any one of the plurality of operation modes from the secondary battery device 140. Alternatively, the EMS200 (receiving unit 210) receives a message indicating the presence of a function of transmitting a message indicating the rated output of the secondary battery 141 from the secondary battery device 140 before transmitting the message indicating the rated output of the secondary battery 141. Alternatively, before transmitting the message indicating the number of times of charging and discharging of the secondary battery 141, the EMS200 (receiving unit 210) receives a message indicating that there is a function of transmitting a message indicating the number of times of charging and discharging of the secondary battery 141 from the secondary battery device 140.

In the first embodiment, the EMS200 (transmission unit 220) transmits a message indicating any one of a plurality of operation modes to the secondary battery device 140 (e.g., PCS 142). Accordingly, the EMS200 (transmission unit 220) instructs the operation mode of the secondary battery 141 to the secondary battery device 140. Alternatively, the EMS200 (transmission unit 220) transmits a message requesting a message indicating the rated output of the secondary battery 141 to the secondary battery device 140. Alternatively, the EMS200 (transmission unit 220) transmits a message requesting a message indicating the number of charges and discharges of the secondary battery 141 to the secondary battery device 140.

In the first embodiment, before transmitting a message specifying any one of a plurality of operation modes, the EMS200 (the transmission unit 220) transmits a message requesting an indication of the presence of a function operating a message specifying any one of the plurality of operation modes to the secondary battery device 140. Alternatively, the EMS200 (the transmission unit 220) transmits a message requesting a message indicating that there is a function of transmitting a message indicating the rated output of the secondary battery 141 to the secondary battery device 140 before transmitting the message indicating the rated output of the secondary battery 141. Alternatively, before transmitting the message indicating the number of times of charging and discharging of the secondary battery 141, the EMS200 (the transmission unit 220) transmits a message requesting a message indicating that there is a function of transmitting a message indicating the number of times of charging and discharging of the secondary battery 141 to the secondary battery device 140.

(message Format)

Hereinafter, a message format according to the first embodiment will be described. Fig. 6 to 8 show examples of message formats according to the first embodiment.

First, a message specifying any one of a plurality of operation modes, each having a different standard of charging and discharging of the storage battery 141, has a format as shown in fig. 6, for example. As shown in fig. 6, the message includes a message type field and an operation mode field.

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

The operation mode field indicates an operation mode of the secondary battery 141. As described above, the operation modes include: (a) a solar power selling priority mode, (b) a solar charging mode, (c) a peak reduction mode, (d) a midnight power utilization mode, (e) a forced power storage mode, (f) a forced power discharge mode, (g) a self-sufficient power storage mode, (h) a self-sufficient power supply mode, and (i) a self-sufficient power storage and supply mode.

Next, the message indicating the rated output of the storage battery 141 has a format shown in fig. 7, for example. As shown in fig. 7, the message includes a message type field and a nominal output field.

The message type field indicates the type of message and, in a first embodiment, indicates that the message includes a nominal output.

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

Third, the message indicating the number of times of charging and discharging of the storage battery 141 has, for example, the format shown in fig. 8. As shown in fig. 8, the message includes a message type field and a number of charging and discharging fields.

The message type field indicates the type of the message, and in the first embodiment, it indicates that the message includes the number of charges and discharges.

The number of charging and discharging field indicates the number of charging and discharging of the secondary battery 141. The charge and discharge number field includes at least the charge and discharge number of the secondary battery 141 in a current state. The number of charging and discharging field may include a maximum number of charging and discharging of the secondary battery 141.

(management method)

Hereinafter, a management method according to the first embodiment will be described. Fig. 9 is a sequence diagram showing the management method of the first embodiment.

As shown in fig. 9, the EMS200 transmits a message (code set request) requesting a code set supported by the secondary battery device 140 to the secondary battery device 140 at step S10. The code set request is an example of a request indicating that there is a message for specifying a function of processing any one of a plurality of operation modes (each having different criteria for charging and discharging the secondary battery 141). Alternatively, the code set request is an example of a request indicating that there is a message for transmitting a function for indicating the rated output message of the storage battery 141. Alternatively, the code set request is an example of a request indicating that there is a function of transmitting a message indicating the number of charges and discharges of the storage battery 141.

In step S20, the secondary battery device 140 transmits a message (code set response) indicating the code set supported by the secondary battery device 140 to the EMS 200. The code set response is an example indicating that there is a message for specifying a function of processing any one of a plurality of operation modes (each having different criteria for charging and discharging of the secondary battery 141). Alternatively, the code set response is an example of a message indicating that there is a function of transmitting a message indicating the rated output of the storage battery 141. Alternatively, the code request is an example of a message indicating that there is a function of transmitting a message indicating the number of charging and discharging times (the accumulated number of charging and discharging times) of the storage battery 141.

In step S30, the EMS200 transmits a message specifying any one of a plurality of operation modes each having a different standard of charging and discharging of the secondary battery 141 to the secondary battery device 140. Upon receiving the message, the storage battery device 140 determines the specified mode by the message, and switches the state of the storage battery device 140 to the specified mode. Accordingly, the EMS200 instructs the operation mode of the secondary battery 141 to the secondary battery device 140. Further, the storage battery device 140 may respond to the EMS200 in relation to the reception of a command for switching modes or the completion of switching modes.

After some time has elapsed, the EMS200 transmits a message (operation mode request) requesting notification of the operation mode of the secondary battery 141 to the secondary battery device 140 in step S40.

In step S50, the storage battery device 140 transmits a message (operation mode response) indicating the operation mode of the storage battery 141 to the EMS200 as a response to the request.

In step S60, the EMS200 transmits a message (rated output request) requesting notification of the rated output of the secondary battery 141 to the secondary battery device 140.

In step S70, 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 rated output response may include a rated output and an output during the independent operation, or may be configured to include information on an output that is a grid connection state or an independent operation state according to a current state.

In step S80, the EMS200 transmits a message (charge and discharge number request) requesting notification of the number of charges and discharges of the secondary battery 141 to the secondary battery device 140.

In step S90, the secondary battery device 140 transmits a message (charge and discharge number response) indicating the accumulated frequency of charge and discharge of the secondary battery 141 to the EMS 200.

As described previously, in the first embodiment, a message is defined which entrusts the storage battery device 140 with a message of the charge and discharge control of the storage battery 141 performed according to the operation mode of the storage battery 141, and at the same time specifies any one of a plurality of operation modes each having a different standard of charge and discharge of the storage battery 141. Accordingly, the EMS200 can appropriately control the secondary battery device 140 without being affected by a communication delay between the EMS200 and the secondary battery device 140. Further, the EMS200 may recognize, for example, the amount of charge and discharge of the accumulator device 140, and thus may appropriately control other devices (e.g., a load and a fuel cell device).

In the first embodiment, the EMS200 can appropriately control other devices (e.g., loads and fuel cell devices) in the autonomous operation state by receiving a message indicating the rated output of the secondary battery 141 in the autonomous operation state from the secondary battery device 140. Alternatively, the EMS200 may determine the degree of degradation of the secondary battery 141 by receiving a message indicating the number of charges and discharges of the secondary battery 141 from the secondary battery device 140. Specifically, in the case where the number of charge and discharge cycles of the battery has a relatively strong relationship with the degree of degradation (like a lithium ion battery), the degree of degradation of the secondary battery 141 can be determined to a certain level by calculation.

[ other embodiments ]

While the present invention has been described with reference to the above embodiments, it should be understood that the discussion and drawings making up a part of this disclosure are not limiting of the invention. Various alternative embodiments, examples, and operating techniques will be apparent to those skilled in the art from this disclosure.

The EMS200 may be a HEMS (home energy management system), may be an SEMS (storage energy management system), may be a BEMS (building energy management system), and may be an FEMS (factory energy management system).

In this embodiment, the consumer facility 10 includes a load 120, a PV device 130, a battery device 140, a fuel cell device 150, and a hot water storage device 160. However, it is sufficient that the consumer appliance 10 comprises at least a battery device 140.

In this embodiment, (a) the solar power selling priority mode, (b) the solar charging mode, and (c) the peak reduction mode are described as operation modes in which devices other than the storage battery 141 operate in cooperation with the storage battery 141. However, the embodiment is not limited thereto. For example, the operating mode of the battery 141 may include an operating mode in which the battery 141 cooperates with the load 120, the fuel cell device 150, or the hot water storage device 160.

Although not particularly mentioned in the embodiment, it is preferable to perform transmission and reception of the code set request and the code set response at the timing of performing initial setting of the storage battery device 140, at the timing of recovering from the power failure, at the timing of turning on power supply of the storage battery device 140, at the timing of turning on power supply of the EMS200, and at the timing of necessity of checking the setting of the storage battery device 140.

Although not particularly mentioned in the embodiment, a message indicating the state of the secondary battery 141 is preferably defined between the EMS200 and the secondary battery device 140. The message indicating the operation mode of the storage battery 141 and the message indicating the number of times of charging and discharging of the storage battery 141 are messages indicating the state of the storage battery 141.

Although not particularly mentioned in the embodiment, the message indicating the description of the secondary battery 141 is preferably defined between the EMS200 and the secondary battery device 140. The message indicating the rated output of the storage battery 141 is an example of a message indicating the description of the storage battery 141.

Although not specifically mentioned in the embodiment, the secondary battery device 140 may transmit various messages to the EMS200 autonomously, not according to a request from the EMS 200. For example, the secondary battery device 140 transmits various messages to the EMS200 when predetermined conditions are satisfied.

Although not specifically mentioned in the embodiment, the storage battery device 140 may transmit a message indicating the description of the storage battery 141 (e.g., a message indicating the rated output of the storage battery 141) and a message indicating the state of the storage battery 141 to the EMS200 together with the code set response.

As described above, it is apparent that the present invention includes various embodiments and the like not described herein. Further, the above-described embodiments and modifications can also be combined. Therefore, the technical scope of the present invention is defined only by the inventive specific subject matter according to the appended claims described above.

It should be noted that japanese patent application No. 2012-174457, filed on 8/6/2012, is incorporated by reference in its entirety.

INDUSTRIAL APPLICABILITY

According to the present invention, it is possible to provide a management system, a management method, a control device, and a power storage device that can appropriately control a device.

Claims

1. A battery apparatus that communicates with a control apparatus using a predetermined protocol, comprising:

a transmission section that transmits, in response to detection of at least any one of timing at which initial setting of the storage battery device is performed, timing at which recovery from a power failure is performed, timing at which power supply of the storage battery device is turned on, timing at which power supply of the control device is turned on, and timing at which setting of the storage battery device must be checked, a code set message including a code set corresponding to the storage battery device to the control device; and

a receiving unit that receives, from the control device, a setting message that instructs setting of an operation mode of the storage battery device as a message that includes an information element that specifies the operation mode of the storage battery device, when a code corresponding to the operation mode setting that sets the operation mode of the storage battery device is included in the code set message.

2. The battery device according to claim 1, wherein the receiving section further receives a request message requesting an operation mode of the battery device from the control device after receiving the setting message,

the transmission section transmits a request response message indicating an operation mode of the storage battery device to the control device as a message containing the information element, according to the request message.

3. The battery apparatus of claim 1, wherein the operating mode comprises an operating mode in which the battery apparatus cooperates with a distributed power source other than the battery apparatus.

4. A battery apparatus according to claim 3, wherein the distributed power sources other than the battery apparatus are photovoltaic cells.

5. The battery device of claim 1, wherein the operating mode is a mode of charging the battery device or a mode of discharging the battery device.

6. A control device that communicates with a battery device using a predetermined protocol, comprising:

a receiving section that receives a code set message from the storage battery device in response to detection of at least any one of timing at which initial setting of the storage battery device is performed, timing at which recovery from a power failure is performed, timing at which power supply of the storage battery device is turned on, timing at which power supply of the control device is turned on, and timing at which setting of the storage battery device has to be checked, wherein the code set message includes a code set corresponding to the storage battery device; and

and a transmission unit that transmits, when a code corresponding to an operation mode setting for setting an operation mode of the battery device is included in the code group message, a setting message indicating the setting of the operation mode of the battery device to the battery device as a message including an information element specifying the operation mode of the battery device.

7. A management method for use in a management system, wherein the management system includes a storage battery device that communicates with a control device using a predetermined protocol,

the management method comprises the following steps:

transmitting a code set message from the storage battery device to the control device in response to detecting at least any one of a timing of performing initial setting of the storage battery device, a timing of recovering from a power failure, a timing of turning on power supply of the storage battery device, a timing of turning on power supply of the control device, and a timing of necessity of checking setting of the storage battery device, wherein the code set message includes a code set corresponding to the storage battery device; and

when a code corresponding to an operation mode setting for setting an operation mode of the battery device is included in the code set message, a setting message indicating the setting of the operation mode of the battery device is transmitted from the control device to the battery device as a message including an information element specifying the operation mode of the battery device.