JP2012115110A - Controller and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for suppressing occurrence of an overload state of a power system when a power failure of the power system is restored and to provide a control method.SOLUTION: The controller is arranged in a user having a control system linked with the power system and is parallel off and it controls power consumed in the user. The controller includes: an acquisition portion which is connected to a power management device controlling power supplied to a user group including the users from the power system and acquires load information determined in accordance with a power amount which can be supplied from the power system from the power management device; and a control portion controlling power consumption in the user based on the load information acquired by the acquisition portion in a case of re-linking after parallel-off from the power system.

Description

  The present invention relates to a control apparatus and a control method that are provided in a consumer having a control system that is connected to and disconnected from an electric power system, and that controls electric power consumed by the consumer.

  In recent years, consumers such as ordinary households equipped with distributed power sources such as solar cells and storage batteries are increasing. There has also been proposed a power management apparatus that controls interconnection between a power system including a distribution line and a transmission line and a distributed power source provided at a customer. Such a power management apparatus is referred to as an EMS (Energy Management System).

  Here, there is a case where the power system is restored after a power failure occurs due to overload or failure of the power system. In such a case, a technology for disconnecting the distributed power source and the power system at the time of a power failure has been proposed in order to suppress the occurrence of reverse power flow from the distributed power source to the power system at the time of restoration of the power system. (For example, Patent Document 1).

JP 2006-24069A

  By the way, at the time of a power failure, electric power is supplied from a distributed power source to a load device provided at a consumer (hereinafter referred to as self-sustained operation). On the other hand, when the power system is restored, the self-sustained operation is canceled and power is supplied from the power system to the load equipment provided to the consumer.

  In such a case, if the independent operation of the load devices provided in each consumer is canceled all at once, the power to be supplied from the power system may exceed the allowable power. If such an overload occurs, a power failure may occur again.

  Therefore, the present invention has been made to solve the above-described problems, and provides a control device and a control method capable of suppressing the occurrence of an overload state of the power system when the power system is restored from a power failure. The purpose is to provide.

In order to solve the above-described problems, the present invention has the following features.
First, the feature of the control device according to the present invention is provided in a customer (customer 301) including a control system (customer control system 1) that is connected to and disconnected from the power system (power systems 230a to 230b). A control device (smart meter 310) that controls power consumed by the consumer, and controls power supplied from the power system to a consumer group (the consumer group 300a to 300b) including the consumer. An acquisition unit (acquisition unit 162) that is connected to a power management device (EMS 100a to 100b) and acquires load information determined according to the amount of power that can be supplied from the power system from the power management device; When reconnecting after disconnecting from the grid, based on the load information acquired by the acquisition unit, a control unit that controls power consumption in the consumer ( And summarized in that and a force control unit 164).

  According to such a feature, after the power failure occurs in the power system and disconnects from the power system, the control device is based on the load information acquired from the power management device when the power failure is restored and reconnected. In consideration of the amount of power that can be supplied from the power system, the power consumption in the consumer is controlled.

  Therefore, according to such a control device, it is possible to suppress the occurrence of an overload state of the power system at the time of recovery from a power failure in consideration of the amount of power that can be supplied from the power system.

  Another feature of the control device according to the present invention is that in the control device according to the above feature, the consumer includes a plurality of load devices (lighting 331, air conditioning device 332, refrigeration device 333, television 334, and heat storage device 335). Etc.), and the control unit selects a load device to which power supply should be prioritized from the plurality of load devices based on the load information, and controls power consumption in the consumer The gist is to do. According to this feature, the control device does not supply power to all the load devices, but selects a load device to which power supply should be prioritized, and controls power consumption in the consumer. Therefore, according to such a control device, it is possible to supply power with priority given to load equipment important to the consumer.

  Another feature of the control device according to the present invention is that, in the control device according to the above feature, the load information is power rate information indicating a power rate. According to this feature, the control device can estimate the amount of power that can be supplied from the power system based on the power rate information and can control the power consumption in the consumer. Considering the amount, it is possible to suppress the occurrence of an overload state of the power system when the power system is restored from a power failure.

  A feature of the control device according to the present invention is provided in a consumer (customer 301) provided with a power system (customer control system 1) that is connected to and disconnected from a power system (power systems 230a to 230b). A control device (smart meter 310) that controls electric power consumed in a house, including load devices (lighting 331, air conditioner 332, refrigerator 333, television 334, heat storage device 335, etc.) provided in the consumer. A plurality of operation modes corresponding to power consumption are defined, and when reconnecting after disconnecting from the power system, select the operation mode with the lowest power consumption from the plurality of operation modes, The gist is to include a control unit (power control unit 164) for controlling power consumption in the consumer.

  According to such a feature, the control device selects the operation mode with the lowest power consumption when the power failure occurs and disconnects from the power system, and when the power failure is restored and reconnected, Control is performed so that the power consumption in the customer is the lowest. Therefore, according to this control apparatus, generation | occurrence | production of the overload state of an electric power system can be suppressed at the time of the recovery | restoration of the power failure of an electric power system.

  Another feature of the control device according to the present invention is that, in the control device according to the above feature, the control unit is reconnected or the customer group including the consumer is reconnected to the power system. Then, the gist is to reselect the operation mode from the plurality of operation modes. According to such a feature, the control device is suitable for the consumer after the supply of power from the power system becomes normal, such as after reconnection or after the customer group performs reconnection. Different operating modes can be reselected.

  A control method according to the present invention is a control method in a control device that is provided in a consumer having a control system that is connected to and disconnected from an electric power system, and that controls the power consumed by the consumer. Is connected to a power management device that controls power supplied from the power system to the consumer group including the consumer, and load information determined according to the amount of power that can be supplied from the power system, A step of acquiring from the power management apparatus (step S101) and a step of controlling power consumption in the consumer based on the acquired load information when reconnecting after disconnecting from the power system (step S103) ).

  A control method according to the present invention is a control method in a control device that is provided in a consumer having a power system that is connected to and disconnected from an electric power system, and that controls power consumed by the consumer. A plurality of operation modes corresponding to the power consumption of the load device provided in the power supply are determined, and when reconnecting after disconnecting from the power system, the operation with the lowest power consumption is selected from the plurality of operation modes. The gist is to include a step (steps S201 to S202) of selecting a mode and controlling power consumption in the consumer.

  ADVANTAGE OF THE INVENTION According to this invention, the control apparatus and control method which can suppress generation | occurrence | production of the overload state of an electric power grid | system at the time of restoration of an electric power grid | system can be provided.

It is a figure for demonstrating the outline | summary of the electric power grid | system system which concerns on 1st and 2nd embodiment of this invention. It is a schematic block diagram which shows the structure of the customer control system which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the smart meter which concerns on 1st Embodiment of this invention. It is a figure which shows the priority table memorize | stored in the memory | storage part which concerns on 1st Embodiment of this invention. It is a figure which shows the object order | rank table memorize | stored in the memory | storage part which concerns on 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the smart meter which concerns on 1st Embodiment of this invention. It is a figure which shows the mode table memorize | stored in the memory | storage part which concerns on 2nd Embodiment of this invention. It is a figure which shows the relationship between the electric power charge of RTP which concerns on 2nd Embodiment of this invention, a charge threshold value, and an operation mode. It is a sequence diagram which shows operation | movement of the smart meter which concerns on 2nd Embodiment of this invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a first embodiment of the present invention will be described. Specifically, (1) schematic configuration of power system, (2) configuration of customer, (3) configuration of smart meter, (4) operation of smart meter, (5) operation and effect will be described. In the description of the drawings in the following embodiments, the same or similar parts are denoted by the same or similar reference numerals.

(1) Schematic Configuration of Power System System FIG. 1 is a schematic configuration diagram of a power system 10 according to the present embodiment.

  As shown in FIG. 1, the power system 10 includes a plurality of demands configured by a power plant 210, substations 220a to 220b, a smart server 400, energy management systems (hereinafter referred to as EMS) 100a to 100b, and a customer 301. It has households 300a to 300b. The substations 220a to 220b convert the power supplied from the power plant 210 and supply the power to a range such as a local unit (for example, Yokohama city). In the example of FIG. 1, each consumer 301 receives supply of electric power generated by the power plant 210 via the substations 220a to 220b and the power systems 230a to 230b.

  Each consumer 301 is a general household. In the present embodiment, each consumer 301 can perform power control of a load device in the consumer. In addition, it is assumed that the plurality of consumer groups 300a to 300b include consumers in which solar cells 321 and storage batteries 322 (see FIG. 2) as distributed power sources are installed.

  The EMSs 100a to 100b are connected to a plurality of customer groups 300a to 300b and the smart server 400 via the wide area communication network 90 (for example, the Internet). EMS100a thru | or 100b acquires the power consumption information which shows the power consumption amount which the load apparatus provided in the consumer 301 consumes from the consumer 301 which comprises each of several consumer group 300a thru | or 300b. Further, the EMSs 100 a to 100 b obtain supplyable information indicating the amount of power that can be supplied by the power system (hereinafter, the amount of power that can be supplied) from the smart server 400.

  In addition, the EMS 100a to 100b notifies the smart server 400 of the power consumption information and the suppliable information in the consumer groups 300a to 300b, and in response to an instruction from the smart server 400, the plurality of consumer groups 300a to 300b. The supplied power can be controlled. Thus, EMS100a thru | or 100b which concern on this embodiment comprise the power management apparatus which controls the electric power supplied to the consumer groups 300a thru | or 300b containing the consumer 301 from the electric power grid | system 230a.

  Further, the EMSs 100a to 100b according to the present embodiment can generate load information determined according to the amount of power that can be supplied from the power systems 230a to 230b. Here, in the present embodiment, it is assumed that such load information is power rate information indicating a power rate.

  Specifically, the EMS 100a to 100b determines a power rate based on the power demand of the consumer group and the power supply of the power grids 230a to 230b based on the acquired power consumption information and suppliable information. Here, the EMS 100a to 100b is such that the larger the value (demand difference) obtained by subtracting the power consumption (demand amount) in the consumer group from the suppliable amount of power from the power systems 230a to 230b to the consumer group, As the supply-demand gap is smaller, the electricity price is increased.

  The EMSs 100a to 100b are provided with a TOU (Time of Use) that is a power rate predetermined for each time zone based on a past supply-demand difference, and an RTP (Real Time Pricing) that is a power rate determined based on a real-time supply-demand difference. ) Two types of power charges can be determined.

  Further, the EMSs 100a to 100b generate power rate information indicating the determined power rate. The EMSs 100 a to 100 b transmit the power rate information to the customer 301 via the wide area communication network 90. Specifically, the EMSs 100a to 100b transmit a TOU, for example, in a 24-hour cycle, for a predetermined period before the time zone to which the TOU is applied (for example, one day before), and for RTP, a transmission cycle of the TOU. Is transmitted with a shorter period (for example, a period of 10 minutes).

  In the present embodiment, the EMSs 100a to 100b transmit power rate information to the customer 301 via the wide area communication network 90 when the power systems 230a to 230b are restored or immediately before the restoration. .

  Moreover, in this embodiment, EMS100a shall be provided corresponding to the consumer group 300a, and shall perform the electric power control in the consumer group 300a. The EMS 100b is provided corresponding to the consumer group 300b, and executes power control in the consumer group 300b. Moreover, each consumer 301 which comprises the consumer group 300a performs electric power control using the control information transmitted from EMS100a. Each consumer 301 constituting the consumer group 300b performs power control using the control information generated by the EMS 100b.

  In the present embodiment, the consumer group 300a is a group made up of consumers 301 belonging to a certain region (such as a municipality). The customer group 300b is a group made up of consumers 301 belonging to other regions (such as municipalities). That is, the plurality of consumers 301 are classified into a plurality of consumer groups 300a to 300b.

  The reason for classifying the consumers 301 in this way is mainly due to the following reason. Specifically, since the amount of power generated by a solar cell as a distributed power source varies depending on the weather (sunshine hours), it is preferable to perform power control by region according to the weather in each region. is there.

  Moreover, the consumer 301 can perform an autonomous operation with the electric power supplied from the solar cell 321 when a power failure occurs in the power system 230a. At this time, the consumer 301 is disconnected from the power system 230a. On the other hand, when the power failure is restored, the customer 301 can reconnect to the power system 230a.

  The smart server 400 is connected to the EMSs 100a to 100b and the substations 220a to 220b via the wide area communication network 90. The smart server 400 can control the power supplied from the substations 220a to 220b. Specifically, the smart server 400 acquires information on the power demand and supply status in the plurality of consumer groups 300a to 300b from the EMS 100a to 100b, and based on these information, the EMS 100a to 100b It is possible to instruct power control of the consumer groups 300a to 300b.

(2) Configuration of Consumer FIG. 2 is a diagram illustrating a schematic configuration of the customer control system 1 in the customer 301. In FIG. 2, each consumer 301 which comprises the consumer group 300a is illustrated. In addition, each consumer 301 which comprises the consumer group 300b is also the same structure.

  As shown in FIG. 2, AC power is supplied to the consumer 301 from the power system 230a. The customer control system 1 includes a smart meter 310, a circuit breaker 311, a hybrid PCS 320, a solar battery 321, a storage battery 322, an illumination 331, an air conditioner 332, a refrigerator 333, a television 334, and a heat storage device 335. Thus, in the present embodiment, the consumer 301 includes a plurality of load devices such as the lighting 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335. Moreover, the solar cell 321 can receive sunlight, and can generate direct-current power according to the received sunlight. The consumer control system 1 may have a storage battery mounted on an electric vehicle or the like. In the present embodiment, the customer control system 1 constitutes a control system that is connected to and disconnected from the power system 230a.

  The smart meter 310 performs power control within the consumer 301. In the present embodiment, the smart meter 310 constitutes a control device that controls the power consumed by the consumer 301.

  The smart meter 310 is connected to the power distribution system 350a and to the home distribution line 350. The smart meter 310 communicates with the circuit breaker 311, the hybrid PCS 320, the illumination 331, the air conditioner 332, the refrigerator 333, the television 334, and the heat storage device 335 via the home communication line 380. The communication may be wireless communication or wired communication.

  Further, the smart meter 310 detects the total amount of power consumption supplied to the hybrid PCS 320, the lighting 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335 from the power system 230a, and consumes the total. Generated as power information. The smart meter 310 is connected to the EMS 100a via the wide area communication network 90, and transmits the power consumption information to the EMS 100a. The smart meter 310 may periodically transmit the power consumption information to the EMS 100a, or may transmit the power consumption information in response to a request from the EMS 100a.

  In addition, the smart meter 310 instructs the hybrid PCS 320 to disconnect from the power system 230a during a power failure. In addition, the smart meter 310 instructs the circuit breaker 311 to shut off the power system 230a and the domestic distribution line 350 at the time of a power failure, and the circuit breaker 311 responds to this instruction with the power system 230a and the domestic distribution line. 350 is cut off. Further, when the power failure is restored, the circuit breaker 311 is instructed to connect the power system 230a and the domestic distribution line 350, and the circuit breaker 311 responds to this instruction with the power system 230a and the domestic distribution line 350. Connect with.

  The hybrid PCS 320 is connected to the domestic distribution line 350 and is connected to a solar battery 321 and a storage battery 322 as a distributed power source. The hybrid PCS 320 operates the solar battery 321 and the storage battery 322 according to the control of the smart meter 310. Further, the hybrid PCS 320 can store the power generated by the solar battery 321 in the storage battery 322. The hybrid PCS 320 can convert AC power supplied from the domestic distribution line 350 into DC power, and store the DC power in the storage battery 322.

  Moreover, the hybrid PCS 320 can convert DC power generated by the discharge of the storage battery 322 or DC power generated by the solar battery 321 into AC power and send it to the home distribution line 350. The AC power sent to the home distribution line 350 is used in the lighting 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335 as appropriate, or becomes reverse power flow to the power system 230a. .

  The lighting device 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335 serving as load devices are connected to the home distribution line 350 and to the home communication line 380. These load devices operate according to the control of the smart meter 310. The heat storage device 335 is, for example, a heat pump or a water heater.

(3) Configuration of Smart Meter The configuration of the smart meter 310 will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration of the smart meter 310.

  As illustrated in FIG. 3, the smart meter 310 according to the present embodiment includes a communication unit 152, a storage unit 153, and a processing unit 154. The communication unit 152 communicates with the EMS 100a via the wide area communication network 90. Further, the communication unit 152 communicates with the hybrid PCS 320 and each load device via the home communication line 380. The storage unit 153 stores a program executed by the processing unit 154 and is used as a work area during execution of the program by the processing unit 120.

  In addition, as illustrated in FIG. 4, the storage unit 153 according to the present embodiment stores a priority table in which a load device name is associated with a priority order. Further, as illustrated in FIG. 5, the storage unit 153 stores a target order table in which the target priority order and the charge threshold are associated with each other. The information in these tables is stored in advance in the storage unit 153 by the user of the load device. Further, these tables are referred to by a processing unit 154 described later.

  The processing unit 154 performs processing according to the program stored in the storage unit 153. The processing unit 154 includes an acquisition unit 162 and a power control unit 164.

  The acquisition unit 162 acquires load information determined by the amount of power supplied from the power system 230a to the customer group 300a from the EMS 100a. Specifically, the acquisition unit 162 acquires power rate information from the EMS 100a via the communication unit 152.

  The power control unit 164 controls the power consumption in the customer 301 based on the power rate information acquired by the acquisition unit 162 when reconnecting after disconnecting from the power system 230a. At this time, the power control unit 164 prioritizes power supply from a plurality of load devices such as the lighting 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335 based on the power rate information. A load device to be selected is selected, and power consumption in the consumer 301 is controlled. An example of a case where the power system 230a is reconnected to the power system 230a after being disconnected from the power system 230a is a case where the power system 230a recovers from a power failure.

  Specifically, the power control unit 164 acquires power rate information from the acquisition unit 162 and refers to the target rank table of the storage unit 153 to identify a rate threshold. At this time, the power control unit 164 specifies a charge threshold value that is higher than the power charge indicated by the power charge information and is closest to the power charge among the charge threshold values. Then, the power control unit 164 identifies the target priority order corresponding to the identified fee threshold.

  Further, the power control unit 164 refers to the priority table and selects a load device name corresponding to the identified target priority order. The power control unit 164 instructs the load device corresponding to the selected load device name to connect to the domestic distribution line 350 or starts. On the other hand, the power control unit 164 does not instruct connection to the home distribution line 350 or instructs to stop the operation for the load device that has not been selected.

  In addition, after giving an instruction to the load device, the power control unit 164 instructs the circuit breaker 311 to connect the power system 230a and the domestic distribution line 350. In response to this instruction, the circuit breaker 311 connects the power system 230 a and the home distribution line 350, and power from the power system 230 a is supplied to each load device via the home distribution line 350.

  The smart meter 310 instructs the hybrid PCS 320 to reconnect after a predetermined period (for example, 5 minutes) after the power system 230a and the home distribution line 350 are connected. Smart meter 310 may immediately instruct hybrid PCS 320 to reconnect without waiting for a predetermined period.

(4) Operation of Smart Meter Next, the operation of the smart meter 310 when the power failure is restored and the customer 301 is reconnected in the customer control system 1 will be described. Here, the operation of the customer 301 included in the customer group 300a will be described as an example, but the customer 301 included in the customer group 300b can also perform the same operation. FIG. 6 is a sequence diagram showing the operation of the smart meter 310.

  In step S101, the acquisition unit 162 of the smart meter 310 acquires power rate information from the EMS 100a via the wide area communication network 90 when the smart meter 310 is recovered from the power failure.

  In step S102, the power control unit 164 of the smart meter 310 selects power from a plurality of load devices such as the lighting 331, the air conditioner 332, the refrigeration device 333, the television 334, and the heat storage device 335 based on the power rate information. Select the load equipment that should prioritize the supply.

  Specifically, the power control unit 164 acquires power rate information from the acquisition unit 162 and refers to the target rank table of the storage unit 153 to identify a rate threshold. Then, the power control unit 164 identifies the target priority order corresponding to the identified fee threshold. Subsequently, the power control unit 164 refers to the priority table and selects a load device name corresponding to the identified target priority order.

  In step S103, the power control unit 164 instructs the load device corresponding to the selected load device name to connect to the domestic distribution line 350 or starts. On the other hand, the power control unit 164 does not instruct connection to the home distribution line 350 or instructs to stop the operation for the load device that has not been selected. In this way, the smart meter 310 selects a load device to which power is to be supplied, and controls power consumption in the consumer 301.

  In step S <b> 104, the power control unit 164 instructs the circuit breaker 311 to connect the power system 230 a and the home distribution line 350. In response to this instruction, the circuit breaker 311 connects the power system 230a and the domestic distribution line 350, and the power from the power system 230a is supplied to the load device.

  In step S105, the power control unit 164 instructs the hybrid PCS 320 to perform reconnection after a predetermined period (for example, 5 minutes) has elapsed. In response to this instruction, the hybrid PCS 320 starts reconnection with the power system 230a and the domestic distribution line 350.

(5) Operation and Effect According to the above-described embodiment, the smart meter 310 receives the power charge acquired from the EMS 100a when the power failure recovers and reconnects after the power failure occurs in the power system 230a. Based on the information, the amount of power that can be supplied from the power system 230a is estimated, and the power consumption in the consumer 301 is controlled.

  Therefore, according to the smart meter 310, the power consumption in the consumer 301 is controlled in consideration of the amount of power that can be supplied from the power system 230a when the power system 230a recovers from a power failure. Generation of a load state can be suppressed.

  Further, according to the smart meter 310, power consumption in the consumer 301 can be suppressed by selecting a load device to which power supply should be prioritized, instead of supplying power to all load devices. Therefore, according to the smart meter 310, power can be supplied with priority given to load devices important to the user.

[Second Embodiment]
Next, the structure of the customer control system 1 which concerns on 2nd Embodiment of this invention is demonstrated. The configuration of the customer control system 1 according to this embodiment is the same as the customer control system 1 according to the first embodiment except for the configuration of the smart meter 310. Therefore, the configuration of the smart meter 310 will be described.

(1) Configuration of Smart Meter The smart meter 310 according to the present embodiment instructs the load device about the operation mode, and the load device is configured to operate according to the operation mode instructed from the smart meter 310. Yes.

  Here, the operation mode is associated with the amount of power consumption of the load device. That is, the load device has different power consumption depending on the set operation mode. In the present embodiment, a plurality of operation modes corresponding to the power consumption of the load device are determined in advance.

  Further, in the smart meter 310 according to the present embodiment, the storage unit 153 stores a mode table in which a plurality of operation modes and charge thresholds corresponding to the respective operation modes are associated as illustrated in FIG.

  The operation mode and the charge threshold value have a correspondence relationship that the operation mode with lower power consumption has a lower charge threshold value, and the operation mode with higher power consumption has a higher charge threshold value. In the example of FIG. 7, as the number of operation modes increases, the corresponding power consumption decreases, and the charge threshold increases as the number increases. The correspondence between the operation mode and the charge threshold is preset for each load device and stored in the storage unit 153.

  Further, in the smart meter 310 according to the present embodiment, the power control unit 164 compares the power charge indicated by the power charge information with a predetermined power charge threshold (charge threshold) to determine the lighting 331 and the air conditioning. The operation mode of the load device such as the device 332, the refrigerator 333, the television 334, and the heat storage device 335 can be determined.

  Here, there are two types of power charges indicated by the charge information: TOU and RTP. RTP has a shorter transmission cycle than TOU and corresponds to a real-time supply and demand situation. For this reason, the power control unit 164 determines the operation mode by comparing the RTP and the charge threshold while acquiring the RTP at a predetermined transmission cycle, and acquires the RTP at a predetermined transmission cycle due to a communication failure or the like. While this is not possible, the operation mode may be determined by comparing the TOU with the charge threshold.

  The power control unit 164 acquires power rate information from the acquisition unit 162 and determines an operation mode for each load device. Specifically, the power control unit 164 refers to the mode table of the storage unit 153, and is higher than the power rate indicated by the power rate information among the rate thresholds and closest to the power rate indicated by the rate information. Identify the charge threshold.

  For example, when the power rate indicated by the rate information is a value between the rate threshold 3 and the rate threshold 4 shown in FIG. 7, the power control unit 164 specifies the rate threshold 4. Furthermore, the power control unit 164 specifies an operation mode corresponding to the specified charge threshold for each load device. For example, when the charge threshold 4 is specified in FIG. 3, the operation mode 4 corresponding to the charge threshold 4 is specified.

  FIG. 8 shows an example of time transition in the RTP power rate. As shown in FIG. 8, the power control unit 164 changes the operation mode every time the RTP power charge increases and exceeds the charge threshold. In this way, the power control unit 164 determines the operation mode based on the power rate indicated by the power rate information, and instructs the load device of the determined operation mode. Further, the load device operates according to the instructed operation mode.

  Here, in the first embodiment described above, when the smart meter 310 reconnects after disconnecting from the power system 230a, the power consumption in the consumer 301 is calculated based on the power rate information transmitted from the EMS 100a. Although configured to control, the smart meter 310 according to the present embodiment controls the power consumption in the consumer 301 without receiving power rate information.

  Specifically, when the power control unit 164 according to the present embodiment reconnects after disconnecting from the power system, the power control unit 164 selects an operation mode with the lowest power consumption from a plurality of operation modes, and the demand Control power consumption in the house.

  For example, when the power failure of the power system 230a is restored and the power control unit 164 is connected to the power system 230a, the power control unit 164 selects the operation mode 4 that is the lowest operation mode. In addition, the power control unit 164 instructs the load device to operate in the selected operation mode 4.

(2) Operation of Smart Meter Next, the operation of the smart meter 310 according to the present embodiment will be described. In addition, the following operation | movement is operation | movement of the smart meter 310 at the time of a power failure recovering and reconnecting, after a power failure generate | occur | produces and disconnects in the electric power grid | system 230a. FIG. 9 shows the operation of the smart meter 310 according to the present embodiment.

  In step S201, in the smart meter 310, the power control unit 164 refers to the mode table in the storage unit 153 and selects the operation mode 4 that is the lowest operation mode.

  In step S202, the power control unit 164 instructs each load device to operate in the selected operation mode 4. In this way, the smart meter 310 controls the power consumption of the load device in the consumer 301 to be low.

  In step S <b> 203, the power control unit 164 instructs the circuit breaker 311 to connect the power system 230 a and the home distribution line 350. In response to this instruction, the circuit breaker 311 connects the power system 230a and the domestic distribution line 350, and the power from the power system 230a is supplied to the load device. At this time, the load device starts operating in the operation mode 4 with the lowest power consumption.

  In step S204, the power control unit 164 instructs the hybrid PCS 320 to perform reconnection after a predetermined period (for example, 5 minutes) has elapsed. In response to this instruction, the hybrid PCS 320 starts reconnection with the power system 230a and the domestic distribution line 350.

  The power control unit 164 reselects the operation mode from the plurality of operation modes based on the power rate indicated by the power rate information when receiving the power rate information after reconnection. May be. Furthermore, when the consumer group 300a including the consumer 301 receives the notification and the power charge information from the EMS 100a after the consumer group 300a including the consumer 301 completes the reconnection with the power system 230a, the power charge information The operation mode may be reselected from among the plurality of operation modes based on the power rate indicated by.

(3) Operation and Effect According to the smart meter 310 according to the present embodiment, the operation that consumes the least amount of power when the power failure recovers and reconnects after the power failure occurs in the power system 230a. A mode (operation mode 4) is selected, and the power consumption of the load device in the consumer 301 is controlled.

  Therefore, according to the smart meter 310, it is possible to connect to the power system 230a after voluntarily suppressing power consumption in the consumer 301 without acquiring information from the outside. When the power failure is restored, the occurrence of an overload state of the power system 230a can be suppressed.

[Other Embodiments]
As mentioned above, although this invention was described by embodiment, it should not be understood that the description and drawing which form a part of this indication limit this invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  In the first embodiment described above, the load information is described as the power charge information. However, the load information is between the suppliable power amount indicated by the suppliable information and the power consumption amount indicated by the power consumption information. Any information indicating how much difference (demand-and-supply difference) exists may be used. For example, it may be a ratio of power consumption to suppliable power. In such a case, instead of the charge threshold value, a plurality of threshold values corresponding to the ratio may be determined in advance. Further, the power consumption may be obtained by subtracting the amount of power that can be supplied from the distributed power source of the consumer 301 from the amount of power consumed by the load device.

  In each embodiment mentioned above, although the solar cell 321 and the storage battery 322 were mentioned as an example as distributed power supply, other power supply devices, such as a wind power generation, may be sufficient.

  Further, in each of the above-described embodiments, the function of the smart meter 310 can be applied to various systems in the smart grid technology such as HEMS (Home Energy Management System) and BEMS (Building and Energy Management System).

  Moreover, in each embodiment mentioned above, the function of the circuit breaker 311 may be provided in the smart meter 310.

  Moreover, in each embodiment mentioned above, you may make it provide the function of the process part 154 of the smart meter 310 in the other apparatus separately provided in the consumer 301. FIG.

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters in the scope of claims reasonable from this disclosure.

DESCRIPTION OF SYMBOLS 1 ... Customer control system, 10 ... Electric power system system, 90 ... Wide area communication network, 100a thru | or 100b ... EMS, 120 ... Processing part, 152 ... Communication part, 153 ... Memory | storage part, 154 ... Processing part, 162 ... Acquisition part, 164 ... Power control unit, 210 ... Power plant, 220a to 220b ... Substation, 230a to 230b ... Power system, 300a to 300b ... Customer group, 301 ... Customer, 310 ... Smart meter, 311 ... Circuit breaker, 320 ... Hybrid PCS, 321 ... solar cell, 322 ... storage battery, 331 ... lighting, 332 ... air conditioner, 333 ... refrigerator, 334 ... television, 335 ... heat storage device, 350 ... home distribution line, 380 ... home communication line, 400 ... Smart server

Claims (7)

A control device that is provided in a consumer having a control system interconnected with and disconnected from the power system, and that controls the power consumed in the consumer,
Connected to a power management device that controls power supplied from the power system to a group of consumers including the consumer,
An acquisition unit that acquires, from the power management device, load information determined according to the amount of power that can be supplied from the power system;
A control device comprising: a control unit that controls power consumption in the consumer based on the load information acquired by the acquisition unit when reconnecting after disconnecting from the power system. The customer is provided with a plurality of load devices,
The said control part selects the load apparatus which should give priority to supply of electric power from among these load apparatus based on the said load information, and controls the power consumption in the said consumer. The control apparatus according to 1.   The control device according to claim 1, wherein the load information is power rate information indicating a power rate. A control device that is provided in a consumer having a power system interconnected with and disconnected from the power system, and that controls power consumed in the consumer,
A plurality of operation modes corresponding to the power consumption of the load equipment provided in the consumer are defined,
When reconnecting after disconnecting from the power system, a control unit that selects an operation mode with the lowest power consumption from the plurality of operation modes and controls power consumption in the consumer is provided. Control device characterized. The control unit reselects an operation mode from the plurality of operation modes after reconnection or after a consumer group including the consumers is reconnected to the power system. The control device according to claim 4. A control method in a control device for controlling power consumed in a consumer, provided in a consumer having a control system interconnected with and disconnected from a power system,
The control device is connected to a power management device that controls power supplied from the power system to a consumer group including the consumer,
Obtaining load information determined according to the amount of power that can be supplied from the power system from the power management device;
And a step of controlling power consumption in the consumer based on the acquired load information when reconnecting after disconnecting from the power system. A control method in a control device for controlling power consumed in a consumer, provided in a consumer having a power system interconnected with and disconnected from the power system,
A plurality of operation modes corresponding to the power consumption of the load equipment provided in the consumer are defined,
When reconnecting after disconnecting from the power system, the operation mode includes a step of selecting an operation mode having the lowest power consumption from the plurality of operation modes and controlling power consumption in the consumer. Control method.

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