JP2015119356A - Power control unit, equipment control unit and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power control unit capable of efficiently controlling plural power source units used in combination.SOLUTION: A power control unit 150 is disposed at the user's side to control the power supply from plural power source units. The power control unit 150 includes: a DC-AC conversion section which is capable of integrally converting DC power output from each of plural power source units into AC power; a communication section that communicates with an external equipment control unit 200 according to a predetermined communication protocol; and a control section that controls plural power source units. The communication section receives a setting request for a set of properties corresponding to a device class of the power control unit 150 from the equipment control unit 200. The control section controls at least one of plural power source units based on the setting request.

Description

  The present invention relates to a power control apparatus, a device control apparatus, and a method for performing communication according to a predetermined communication protocol.

  2. Description of the Related Art In recent years, a control system (EMS: Energy Management System) provided with an electric power consumer and equipped with a device control device that controls a plurality of devices has attracted attention. In such a system, a communication protocol is introduced for enabling a device control apparatus to control devices provided by various manufacturers.

  ECHONET Lite (registered trademark), which is one of such communication protocols, defines a device class for each type of device, and defines for each device class the information and control target of the device as properties. For example, the storage battery device belongs to the storage battery class, and the properties corresponding to the storage battery class include a storage battery capacity, a maximum and minimum charging power value, and the like (see Non-Patent Document 1).

  On the other hand, introduction of a power supply system that has a power control device (power conditioner) that can collectively convert DC power output from each of a plurality of power supply devices into AC and that supplies AC power to a load is being studied. . The plurality of power supply devices are a solar power generation device, a storage battery device, a fuel cell device, and the like.

“ECHONET SPECIFICATION APPENDIX ECHONET Device Object Detailed Regulations Release D”, October 31, 2013, Internet <URL: http://www.echonet.gr.jp/spec/pdf_spec_app_d/SpecAppendixD.pdf>

  The power supply system described above is a new system that uses a plurality of power supply devices in combination, and has a feature that is not found in a conventional system that uses a power supply device alone.

  For example, by charging the storage battery device with the direct current power output from the solar power generation device as direct current, the power conversion loss can be reduced as compared with a conventional system that performs direct current to alternating current conversion in the power supply device.

  However, the above-described communication protocol assumes only a conventional system that uses a power supply device alone, and it is difficult to achieve efficient control when a plurality of power supply devices are used in combination.

  Therefore, an object of the present invention is to provide a power control device, a device control device, and a method capable of realizing efficient control when a plurality of power supply devices are used in combination.

  The power control apparatus according to the first feature is provided in a consumer and controls power supply from a plurality of power supply apparatuses. The power control device includes: a conversion unit capable of collectively converting DC power output from each of the plurality of power supply devices into AC; a communication unit that performs communication with an external device control device according to a predetermined communication protocol; A control unit that controls a plurality of power supply devices. The communication unit receives a setting request for requesting setting of a property corresponding to a device class of the power control device from the device control device. The control unit controls at least one of the plurality of power supply devices based on the setting request.

  The device control apparatus according to the second feature controls a power control apparatus capable of collectively converting DC power output from each of the plurality of power supply apparatuses into AC. The device control apparatus includes a communication unit that performs communication with the power control apparatus according to a predetermined communication protocol. The communication unit transmits a setting request for requesting setting of a property corresponding to a device class of the power control apparatus to the power control apparatus.

  The method according to the third feature is used in a system including a plurality of power supply apparatuses and a power control apparatus capable of collectively converting DC power output from each of the plurality of power supply apparatuses into AC. The method performs communication according to a predetermined communication protocol between the power control device and the device control device, and corresponds to the device class of the power control device from the device control device to the power control device in the communication. Transmitting a setting request for requesting setting of a property; and controlling the at least one of the plurality of power supply devices based on the setting request.

  According to the present invention, it is possible to provide a power control device, a device control device, and a method capable of realizing efficient control when a plurality of power supply devices are used in combination.

It is a block diagram which shows the structure of the control system which concerns on 1st Embodiment thru | or 5th Embodiment. It is a block diagram which shows the structure of the power control apparatus which concerns on 1st Embodiment thru | or 5th Embodiment. It is a block diagram which shows the structure of the apparatus control apparatus which concerns on 1st Embodiment thru | or 5th Embodiment. It is a sequence diagram which shows the sequence at the time of node connection which concerns on 1st Embodiment. It is a sequence diagram which shows the operation | movement which concerns on 1st Embodiment. It is a sequence diagram which shows the operation | movement which concerns on 2nd Embodiment. It is a sequence diagram which shows the operation | movement which concerns on 3rd Embodiment. It is a sequence diagram which shows the operation | movement which concerns on 4th Embodiment. It is a sequence diagram which shows the operation | movement which concerns on 5th Embodiment.

[Outline of Embodiment]
The power control apparatus according to the first to fifth embodiments is provided in a consumer and controls power supply from a plurality of power supply apparatuses. The power control device includes: a conversion unit capable of collectively converting DC power output from each of the plurality of power supply devices into AC; a communication unit that performs communication with an external device control device according to a predetermined communication protocol; A control unit that controls a plurality of power supply devices. The communication unit receives a setting request for requesting setting of a property corresponding to a device class of the power control device from the device control device. The control unit controls at least one of the plurality of power supply devices based on the setting request.

  In the first embodiment, the property includes a suppression value or a suppression rate of the conversion unit.

  In the second embodiment, the property includes an instantaneous input / output value of the conversion unit.

  In the third embodiment, the plurality of power supply devices include a storage battery device and a solar power generation device. The property includes a charging mode of the storage battery device. The charging mode includes a surplus charging mode in which only surplus power of the solar power generation device is charged.

  In a modification of the third embodiment, the plurality of power supply devices include a storage battery device and a solar power generation device. The said communication part further receives the setting request | requirement which requests | requires the setting of the property corresponding to the apparatus class of the said storage battery apparatus from the said apparatus control apparatus. The property corresponding to the device class of the storage battery device includes a charging mode of the storage battery device. The charging mode includes a surplus charging mode in which only surplus power of the solar power generation device is charged.

  In the fourth embodiment, the plurality of power supply devices include a storage battery device. The property includes a discharge mode of the storage battery device. The discharge mode includes a load following discharge mode in which discharging is performed so as to follow an increase or decrease in power consumption of the load.

  In a modification of the fourth embodiment, the plurality of power supply devices include a storage battery device. The said communication part further receives the setting request | requirement which requests | requires the setting of the property corresponding to the apparatus class of the said storage battery apparatus from the said apparatus control apparatus. The property corresponding to the device class of the storage battery device includes a discharge mode of the storage battery device. The discharge mode includes a load following discharge mode in which discharging is performed so as to follow an increase or decrease in power consumption of the load.

  In the fifth embodiment, the property includes a maximum discharge value of load following discharge.

  The device control apparatus according to the first to fifth embodiments controls a power control apparatus that can convert DC power output from each of a plurality of power supply apparatuses into AC. The device control apparatus includes a communication unit that performs communication with the power control apparatus according to a predetermined communication protocol. The communication unit transmits a setting request for requesting setting of a property corresponding to a device class of the power control apparatus to the power control apparatus.

  In the first embodiment, the property includes a suppression value or a suppression rate of a conversion unit that is provided in the power control device and collectively converts DC power from the plurality of power supply devices into AC.

  In the second embodiment, the property includes an instantaneous input / output value of a conversion unit that is provided in the power control device and collectively converts DC power from the plurality of power supply devices into AC.

  In the third embodiment, the plurality of power supply devices include a storage battery device and a solar power generation device. The property includes a charging mode of the storage battery device. The charging mode includes a surplus charging mode in which only surplus power of the solar power generation device is charged.

  In a modification of the third embodiment, the plurality of power supply devices include a storage battery device and a solar power generation device. The communication unit further transmits a setting request for requesting setting of a property corresponding to a device class of the storage battery device to the power control device. The property corresponding to the device class of the storage battery device includes a charging mode of the storage battery device. The charging mode includes a surplus charging mode in which only surplus power of the solar power generation device is charged.

  In the fourth embodiment, the plurality of power supply devices include a storage battery device. The property includes a discharge mode of the storage battery device. The discharge mode includes a load following discharge mode in which discharging is performed so as to follow an increase or decrease in power consumption of the load.

  In a modification of the fourth embodiment, the plurality of power supply devices include a storage battery device. The communication unit further transmits a setting request for requesting setting of a property corresponding to a device class of the storage battery device to the power control device. The property corresponding to the device class of the storage battery device includes a discharge mode of the storage battery device. The discharge mode includes a load following discharge mode in which discharging is performed so as to follow an increase or decrease in power consumption of the load.

  In the fifth embodiment, the property includes a maximum discharge value of load following discharge.

  The method according to the first to fifth embodiments is used in a system including a plurality of power supply devices and a power control device capable of collectively converting DC power output from each of the plurality of power supply devices into AC. It is done. The method performs communication according to a predetermined communication protocol between the power control device and the device control device, and corresponds to the device class of the power control device from the device control device to the power control device in the communication. Transmitting a setting request for requesting setting of a property; and controlling the at least one of the plurality of power supply devices based on the setting request.

[First Embodiment]
The first embodiment will be described below.

(System configuration)
FIG. 1 is a block diagram illustrating a configuration of a control system 10 according to the first embodiment. In FIG. 1, a broken line indicates a signal line, and a solid line indicates a power line. The signal line may be wireless or wired. FIG. 2 is a block diagram showing a configuration of the power control apparatus 150 according to the first embodiment. FIG. 3 is a block diagram illustrating a configuration of the device control apparatus 200 according to the first embodiment.

  As shown in FIG. 1, the control system 10 is provided in a consumer who receives power supply from a distribution line 30 (power system). The control system 10 includes a meter device 110, a load 120, a plurality of power supply devices (solar power generation device 130 and storage battery device 140), a power control device 150, and a device control device 200. In the first embodiment, the plurality of power supply devices include the solar power generation device 130 and the storage battery device 140. However, in addition to the solar power generation device 130 or in place of the solar power generation device 130, another power generation device (for example, a fuel cell device or a gas turbine power generation device) may be used.

  The meter device 110 is a device that measures system power (power purchased power) supplied from the distribution line 30 via a power line. The meter device 110 may measure the power (power sold) supplied from the power control device 150 via the power line. The meter device 110 notifies the measurement value to the device control device 200 via the signal line. The meter device 110 communicates with the device control device 200 via a signal line. The meter device 110 acquires various types of information via an external network such as a public network. Various types of information include a power purchase unit price and a power sale unit price for each time period. Such a meter device 110 is referred to as a smart meter. The meter device 110 notifies the device control device 200 of various information acquired via the external network via a signal line.

  The load 120 is a device that consumes power supplied from the distribution line 30 and / or the power control device 150 via the power line. For example, the load 120 is a refrigerator, lighting, an air conditioner, a television, or the like. The load 120 may be a single device or may include a plurality of devices. The load 120 communicates with the device control apparatus 200 via a signal line.

  The solar power generation device 130 is a device that generates power, and includes a PV (photovoltaics) 131 and a direct current-direct current (DC-DC) conversion unit 132. The PV 131 generates power in response to received sunlight and outputs the generated DC power. The DC-DC converter 132 steps up or steps down the DC power output from the PV 131 and outputs DC power (generated power) via the power line. In addition, the DC-DC converter 132 communicates with the power control apparatus 150 via a signal line.

  The storage battery device 140 is a device that stores electric power. The storage battery device 140 is charged by at least one of the system power supplied from the distribution line 30 via the power control device 150 and the generated power supplied from the solar power generation device 130. The storage battery device 140 includes a storage battery 141 and a DC-DC conversion unit 142. The storage battery 141 accumulates (charges) power and supplies (discharges) power. The DC-DC converter 142 boosts or lowers the DC power supplied via the power line when the storage battery 141 is charged, and outputs the DC power to the storage battery 141. The DC-DC converter 142 boosts or steps down the DC power output from the storage battery 141 when the storage battery 141 is discharged, and outputs DC power (discharge power) via the power line. Moreover, the DC-DC conversion part 142 communicates with the power control apparatus 150 via a signal line.

  The power line extending from the solar power generation device 130 is electrically connected to the power line extending from the storage battery device 140, and the connected power line is connected to the power control device 150. The power line transmits DC power.

  The power control device 150 is a device that controls power supply from the solar power generation device 130 and the storage battery device 140. As illustrated in FIG. 2, the power control device 150 includes a communication unit 151, a control unit 152, and a direct current-alternating current (DC-AC) conversion unit 153. The communication unit 151 communicates with the solar power generation device 130, the storage battery device 140, and the device control device 200 via a signal line. The control part 152 controls the solar power generation device 130 and the storage battery device 140 by the communication. Further, the control unit 152 controls the DC-AC conversion unit 153. The DC-AC conversion unit 153 collectively converts DC power output from each of the solar power generation device 130 and the storage battery device 140 into AC. The DC-AC conversion unit 153 can also convert AC power (system power) supplied from the distribution line 30 into DC.

  The power control device 150 constitutes a power supply system that collectively converts DC power output from each of the plurality of power supply devices into AC and supplies the AC power to the load 120. Hereinafter, such a power feeding system is referred to as a “multi-DC link system”. The multi-DC link system is a new system in which a plurality of power supply devices are used in combination, and has a feature not found in a conventional system that uses a power supply device alone. For example, the DC-AC conversion loss can be prevented from occurring by charging the storage battery device 140 with the DC power (generated power) output from the solar power generation device 130 as DC.

  The device control apparatus 200 controls a plurality of devices provided to consumers. The device control apparatus 200 is, for example, a HEMS (Home Energy Management System) that controls a plurality of devices provided in a house. As illustrated in FIG. 3, the device control apparatus 200 includes a communication unit 210 and a control unit 220. The communication unit 210 communicates with the meter device 110, the load 120, and the power control device 150 via a signal line. The control unit 220 controls the load 120 and the power control device 150 based on information acquired from the meter device 110 by the communication unit 210, for example. The communication unit 151 of the power control device 150 and the communication unit 210 of the device control device 200 communicate according to a predetermined communication protocol.

(Communication protocol)
In the first embodiment, the predetermined communication protocol is ECHONET Lite (registered trademark).

  The protocol stack of a device (also referred to as a “node”) compliant with ECHONET Lite (registered trademark) is divided into three layers: a lower communication layer, communication middleware, and application software. In the OSI reference model, the lower communication layer corresponds to the first layer to the fourth layer, the communication middleware corresponds to the fifth layer to the sixth layer, and the application software corresponds to the seventh layer. ECHONET Lite (registered trademark) defines the specifications of the communication middleware, and does not specify the specifications of the lower communication layer.

  In the first embodiment, each of the communication unit 151 of the power control device 150 and the communication unit 210 of the device control device 200 executes functions of a lower communication layer and a communication middleware. Each of the control unit 152 of the power control device 150 and the control unit 220 of the device control device 200 executes a function of application software.

  In addition, ECHONET Lite (registered trademark) defines a device class (also referred to as “device object”) for each device type, and defines parameters related to the device for each device class as properties. For example, the solar power generation device 130 belongs to the “residential solar power generation class”, and the storage battery device 140 belongs to the “storage battery class”. Further, the properties corresponding to the storage battery class include a storage battery capacity and a maximum and minimum charging power value. In the first embodiment, a “multi-DC link class” is newly defined as a device class of the power control apparatus 150.

  The communication unit 151 of the power control device 150 relates to each property relating to the solar power generation device 130 (residential solar power generation class), each property relating to the storage battery device 140 (storage battery class), and to the power control device 150 (multi-DC link class). Manage each property. Information managed for each device class in this way is referred to as an “instance”. In addition, the communication unit 151 of the power control apparatus 150 manages the attribute information (for example, manufacturer code, product code, serial number) of the power control apparatus 150 as a “node profile (profile object)”.

  The message transmitted and received by the communication middleware includes, for example, “transmission source object identification code”, “transmission destination object identification code”, “service identification code”, “property identification code”, “property value”, and the like. The transmission source object identification code is information for identifying the transmission source object. The transmission destination object identification code is information (device class identification code) for identifying the transmission destination object. The service identification code is information for identifying the operation content for the property value. The service identification code is, for example, “Set” which is a property value setting request or “Get” which is a property value read request. The property identification code is information for identifying a property.

(Sequence when connecting nodes)
FIG. 4 is a sequence diagram showing a node connection sequence according to the first embodiment. The node connection sequence is started, for example, when the device control apparatus 200 is activated. Each message shown in FIG. 4 is transmitted and received by the communication unit 151 of the power control device 150 and the communication unit 210 of the device control device 200.

  As shown in FIG. 4, in step S11, the device control apparatus 200 generates a read request (hereinafter referred to as a “Get message”) requesting reading of a main node profile (manufacturer code, product code, serial number, etc.) as power. It transmits to the control apparatus 150.

  In step S <b> 12, the power control apparatus 150 transmits a read response (hereinafter referred to as “Get Res message”) notifying the main node profile to the device control apparatus 200 in response to the reception of the Get message. The device control apparatus 200 acquires a main node profile and detects a node using the Get Res message, but at this time, the instance managed by the node is unknown.

  In step S13, the device control apparatus 200 transmits to the detected node (power control apparatus 150) a Get message requesting reading of an instance list that is a list of instances managed by the node.

  In step S <b> 14, the power control apparatus 150 transmits a Get Res message notifying the instance list of the own node to the device control apparatus 200 in response to the reception of the Get message. The instance list includes an instance of a residential photovoltaic class, an instance of a storage battery class, and an instance of a multi-DC link class. In other words, the power control device 150 notifies the device control device 200 of the device class of the power control device 150 in addition to notifying the device control device 200 of the device classes of the solar power generation device 130 and the storage battery device 140. To do.

  The device control apparatus 200 acquires an instance list by the Get Res message. In other words, the device control apparatus 200 acquires the device class of the power control device 150 from the power control device 150 in addition to acquiring the device classes of the solar power generation device 130 and the storage battery device 140 from the power control device 150. To do. As a result, the device control apparatus 200 manages the instances of the residential solar power generation class and the storage battery class and the instances of the multi-DC link class while the detected node (power control apparatus 150) manages each instance. Know that you are.

  In step S <b> 15, device control apparatus 200 transmits a Get message requesting reading of a property map of an instance of the storage battery class to power control apparatus 150. The property map is a list of properties included in the instance.

  In step S <b> 16, the power control apparatus 150 transmits a Get Res message that notifies the property map of the instance of the storage battery class to the device control apparatus 200 in response to the reception of the Get message. The device control apparatus 200 acquires the property map of the instance of the storage battery class by the Get Res message. Examples of the properties included in the instance of the storage battery class (hereinafter referred to as “property corresponding to the storage battery class”) include an operation state, an operation mode setting, an instantaneous charge / discharge power measurement value, a remaining power storage amount, and a storage battery type.

  In step S <b> 17, the device control apparatus 200 transmits a Get message requesting reading of the property map of the instance of the residential solar power generation class to the power control apparatus 150.

  In step S <b> 18, the power control apparatus 150 transmits a Get Res message that notifies the property map of the instance of the residential solar power generation class to the device control apparatus 200 in response to the reception of the Get message. The device control apparatus 200 acquires the property map of the instance of the residential solar power generation class using the Get Res message. Examples of properties included in an instance of a residential solar power generation class (hereinafter referred to as “property corresponding to a residential solar power generation class”) include an operating state, an instantaneous generated power measurement value, an integrated generated power measurement value, and power generation. Examples include power limit settings.

  In step S <b> 19, the device control apparatus 200 transmits to the power control apparatus 150 a Get message that requests reading of the property map of the instance of the multi-DC link class.

  In step S20, the power control apparatus 150 transmits a Get Res message that notifies the property map of the instance of the multi-DC link class to the device control apparatus 200 in response to the reception of the Get message. The device control apparatus 200 acquires the property map of the instance of the multi-DC link class using the Get Res message. A specific example of a property included in an instance of the multi DC link class (hereinafter referred to as “property corresponding to the multi DC link class”) will be described later.

(Operation according to the first embodiment)
When the above-described node connection sequence is completed, the device control apparatus 200 grasps the properties included in each instance managed by the power control apparatus 150 so that the device control apparatus 200 can control the power control apparatus 150. Become.

  The communication unit 210 of the device control apparatus 200 transmits a setting request for requesting setting of a property (specific property) corresponding to the multi-DC link class to the power control apparatus 150. The setting request includes the object identification code of the device control apparatus 200 as the “transmission source object identification code”, the object identification code of the power control apparatus 150 as the “transmission destination object identification code”, and the “service identification code” as, for example, A message including Set, including an identification code of a specific property as “property identification code”, and including a property value of the specific property as “property value”. Hereinafter, such a message is referred to as a “Set message”. The Set message includes a “SetC message” that is a Set message that requires a response and a “SetI message” that is a Set message that does not require a response.

  The communication unit 151 of the power control device 150 receives from the device control device 200 a Set message that requests setting of a property corresponding to the multi-DC link class. The control unit 152 of the power control device 150 controls at least one of the solar power generation device 130 and the storage battery device 140 based on the Set message. Thus, the power control device 150 is not based on the property corresponding to the residential solar power generation class or the property corresponding to the storage battery class, but based on the property corresponding to the multi-DC link class, and the solar power generation device 130 and the storage battery device. Control at least one of 140. That is, the power control device 150 autonomously controls the solar power generation device 130 and the storage battery device 140 in place of the device control device 200. Thereby, when a new system (multi-DC link system) using a combination of a plurality of power supply devices is introduced, efficient control can be realized.

  In the first embodiment, the property corresponding to the multi-DC link class includes the suppression value or suppression rate of the DC-AC conversion unit 153. The suppression value of the DC-AC conversion unit 153 is an upper limit value of the output of the DC-AC conversion unit 153, and is specified by an instantaneous power value (W). The suppression rate of the DC-AC conversion unit 153 is an upper limit value of the output of the DC-AC conversion unit 153, and is specified by a ratio (%) to the rated output value of the DC-AC conversion unit 153.

  The control unit 152 of the power control device 150 stores the generated power of the solar power generation device 130 without suppressing the output of the solar power generation device 130 based on the suppression value or the suppression rate of the DC-AC conversion unit 153. 140 is charged. Thereby, efficient control can be performed without wasting power generated by the solar power generation device 130. In addition, the system can be stabilized without suppressing the output of the solar power generation device 130 as much as possible.

  FIG. 5 is a sequence diagram showing an operation according to the first embodiment.

  As shown in FIG. 5, the meter device 110 receives, from the external network, a suppression operation instruction that instructs to suppress the output of the distributed power source, for example, when the system voltage rises, and transfers the suppression operation instruction to the device control apparatus 200. To do.

  In step S101, the device control apparatus 200 receives the suppression operation instruction from the meter device 110, and determines the suppression value or the suppression rate of the DC-AC conversion unit 153 based on the suppression operation instruction. Here, it is assumed that a suppression value of 2.0 kW has been determined.

  In step S102, the device control apparatus 200 transmits a SetC message requesting the setting of the suppression value of the DC-AC conversion unit 153 to the power control apparatus 150 as a property corresponding to the multi-DC link class.

  In response to the reception of the SetC message, the power control apparatus 150 monitors the output of the DC-AC conversion unit 153 and performs control so that the output of the DC-AC conversion unit 153 does not exceed 2.0 kW. For example, when the generated power of the solar power generation device 130 exceeds 2.0 kW, control is performed to charge the storage battery device 140 with the excess generated power.

  In step S <b> 103, the power control apparatus 150 transmits a “Set Res message” that is a setting response for notifying the setting of the suppression value “2.0 kW” of the DC-AC conversion unit 153 to the device control apparatus 200.

(Summary of the first embodiment)
As described above, the communication unit 210 of the device control apparatus 200 transmits a Set message for requesting setting of a property corresponding to the multi-DC link class to the power control apparatus 150. The communication unit 151 of the power control device 150 receives the Set message from the device control device 200. The control unit 152 of the power control device 150 controls at least one of the solar power generation device 130 and the storage battery device 140 based on the Set message.

  Thereby, when a new system (multi-DC link system) using a combination of a plurality of power supply devices is introduced, efficient control can be realized.

  In the first embodiment, the property corresponding to the multi-DC link class includes the suppression value or suppression rate of the DC-AC conversion unit 153. The control unit 152 of the power control device 150 charges, for example, the generated power of the solar power generation device 130 to the storage battery device 140 without suppressing the output of the solar power generation device 130 based on the set suppression value or suppression rate. To control.

  Thereby, efficient control can be performed without wasting power generated by the solar power generation device 130.

[Modification of First Embodiment]
The device control apparatus 200 may transmit, to the power control apparatus 150, a Get message that requests reading of a suppression value or suppression rate of the DC-AC conversion unit 153 as a property corresponding to the multi-DC link class.

  Further, the power control apparatus 150 may transmit a Get Res message that notifies the suppression value or the suppression rate of the DC-AC conversion unit 153 to the device control apparatus 200 in response to reception of the Get message.

[Second Embodiment]
In the following, the difference between the second embodiment and the first embodiment will be described. In the second embodiment, the system configuration is the same as that of the first embodiment.

  In the DC-AC conversion unit 153 of the power control device 150, a DC-AC conversion loss occurs when the outputs of the solar power generation device 130 and the storage battery device 140 are collectively converted to AC.

  Therefore, when the device control apparatus 200 sets the output values of the solar power generation apparatus 130 and the storage battery apparatus 140 and regards the sum of these output values as the output value of the power control apparatus 150, the DC-AC conversion loss An error of minutes occurs.

  In the description of step S101 in FIG. 5, the example in which the device control apparatus 200 determines the suppression rate is shown, but the suppression operation instruction from the meter device 110 may be configured to include the suppression rate in advance. good. In this case, a high forcible force is given to the suppression operation instruction from the meter device 110, and the device control apparatus 200 that has received the suppression operation instruction notifies the power control apparatus 150 of the suppression rate included in the suppression operation instruction as it is. It is preferable to be configured. Thereby, since it can operate | move faithfully to the control instruction | command for the stabilization of the system | strain from a system | strain, it becomes easy to perform the stabilization control across many consumers.

(Operation according to the second embodiment)
In the second embodiment, the property corresponding to the multi-DC link class includes the instantaneous input / output value of the DC-AC conversion unit 153. The instantaneous input / output value of the DC-AC conversion unit 153 is different from the upper limit value (suppression value) of the output of the DC-AC conversion unit 153 as described above, and directly specifies the output of the DC-AC conversion unit 153. Is.

  The communication unit 210 of the device control apparatus 200 transmits a Set message requesting the setting of the instantaneous input / output value of the DC-AC conversion unit 153 to the power control apparatus 150. The communication unit 151 of the power control device 150 receives the Set message from the device control device 200. The control unit 152 of the power control device 150 controls at least one of the solar power generation device 130 and the storage battery device 140 based on the Set message.

  FIG. 6 is a sequence diagram showing an operation according to the second embodiment.

  As illustrated in FIG. 6, the device control device 200 determines an instantaneous input / output value of the DC-AC conversion unit 153 based on the power unit price information obtained from the meter device 110 and the remaining amount of power stored in the storage battery device 140. Here, it is assumed that an instantaneous input / output value of 3.0 kW is determined.

  In step S201, the device control apparatus 200 transmits a SetC message requesting the setting of the instantaneous input / output value of the DC-AC conversion unit 153 to the power control apparatus 150 as a property corresponding to the multi-DC link class.

  In response to the reception of the SetC message, the power control apparatus 150 monitors the output of the DC-AC conversion unit 153 and controls the output of the DC-AC conversion unit 153 to be 3.0 kW. For example, when the generated power of the solar power generation device 130 exceeds 3.0 kW, control is performed to charge the storage battery device 140 with the excess generated power. Alternatively, when the generated power of the solar power generation device 130 is less than 3.0 kW, the storage battery device 140 is discharged so that the output of the DC-AC conversion unit 153 becomes 3.0 kW.

  In step S <b> 202, the power control apparatus 150 transmits a Set Res message that notifies the setting of the instantaneous input / output value of the DC-AC conversion unit 153 to the device control apparatus 200.

(Summary of the second embodiment)
As described above, in the second embodiment, the property corresponding to the multi-DC link class includes the instantaneous input / output value of the DC-AC conversion unit 153. Based on the set instantaneous input / output value, the control unit 152 of the power control device 150, for example, causes the storage battery device 140 to charge the generated power of the solar power generation device 130 without suppressing the output of the solar power generation device 130. Take control.

  Thereby, efficient control can be performed without wasting power generated by the solar power generation device 130.

  In addition, the device control device 200 sets instantaneous input / output values without giving specific instructions to the solar power generation device 130 and the storage battery device 140, respectively. Thereby, in the power control device 150, a specific operation for the photovoltaic power generation device 130 and the storage battery device 140 is determined, and arithmetic processing for control can be distributed, and the response is better. Enables system construction.

[Third Embodiment]
In the following, the difference between the third embodiment and the first embodiment will be described. The third embodiment is the same as the first embodiment in terms of the system configuration.

(Operation according to the third embodiment)
In the third embodiment, the property corresponding to the multi-DC link class includes the charging mode of the storage battery device 140. The charging mode includes a surplus charging mode in which only surplus power of the solar power generation device 130 is charged. The surplus charging mode is a special charging mode in which only generated power is charged, unlike the normal charging mode in which grid power is also charged.

  The communication unit 210 of the device control apparatus 200 transmits a Set message for requesting setting of the surplus charging mode to the power control apparatus 150. The communication unit 151 of the power control device 150 receives the Set message from the device control device 200. Based on the Set message, the control unit 152 of the power control device 150 controls the storage battery device 140 (and the DC-AC conversion unit 153) to charge only the generated power of the solar power generation device 130.

  FIG. 7 is a sequence diagram showing an operation according to the third embodiment.

  As illustrated in FIG. 7, in step S301, the device control apparatus 200 transmits a SetC message requesting setting of the surplus charging mode to the power control apparatus 150 as a property corresponding to the multi-DC link class.

  In response to the reception of the SetC message, the power control device 150 controls the storage battery device 140 (and the DC-AC conversion unit 153) to charge only the power generated by the solar power generation device 130.

  In step S <b> 302, the power control device 150 transmits a Set Res message notifying the setting of the surplus charging mode to the device control device 200.

(Summary of the third embodiment)
As described above, in the third embodiment, by setting the surplus charging mode, it is possible to accumulate all the generated power of the solar power generation device 130 for consumption by the load 120 (that is, private consumption). Thereby, the generated electric power stored in the period with a large amount of power generation (for example, daytime) can be consumed in the period with a small amount of power generation (for example, at night).

[Modification Example of Third Embodiment]
The setting of the surplus charging mode may be a property corresponding to the storage battery class instead of a property corresponding to the multi-DC link class. In this case, device control apparatus 200 transmits a Set message requesting setting of surplus charging mode as a property corresponding to the storage battery class to power control apparatus 150. Based on the Set message, the power control device 150 controls the storage battery device 140 (and the DC-AC conversion unit 153) to charge only the power generated by the solar power generation device 130.

[Fourth Embodiment]
In the following, the difference between the fourth embodiment and the first embodiment will be described. In the fourth embodiment, the system configuration is the same as that of the first embodiment.

(Operation according to the fourth embodiment)
In the fourth embodiment, the property corresponding to the multi-DC link class includes the discharge mode of the storage battery device 140. The discharge mode includes a load following discharge mode in which discharge is performed so as to follow an increase or decrease in power consumption of the load 120. In the load following discharge mode, the power control device 150 adjusts the generated power in accordance with the power consumption obtained from the measurement values of the meter device 110 or other sensors.

  The communication unit 210 of the device control apparatus 200 transmits a Set message requesting setting of the load following discharge mode to the power control apparatus 150. The communication unit 151 of the power control device 150 receives the Set message from the device control device 200. Based on the Set message, the control unit 152 of the power control device 150 controls the storage battery device 140 to discharge in the load following discharge mode.

  FIG. 8 is a sequence diagram showing an operation according to the fourth embodiment.

  As illustrated in FIG. 8, in step S401, the device control apparatus 200 transmits a SetC message requesting setting of the load following discharge mode to the power control apparatus 150 as a property corresponding to the multi-DC link class. In response to the reception of the SetC message, the power control device 150 controls the storage battery device 140 to discharge in the load following discharge mode.

  In step S402, the power control apparatus 150 transmits a Set Res message notifying the setting of the load following discharge mode to the device control apparatus 200.

(Summary of the fourth embodiment)
As described above, in the fourth embodiment, by setting the load following discharge mode, even when the power consumption at the load 120 cannot be covered by the generated power of the solar power generation device 130 alone, the discharge is appropriately performed. Therefore, purchased power (power purchase) from the power system can be reduced as much as possible.

[Modification Example of Fourth Embodiment]
The setting of the load following discharge mode may be a property corresponding to the storage battery class instead of a property corresponding to the multi-DC link class. In this case, device control apparatus 200 transmits a Set message requesting setting of load following discharge mode as a property corresponding to the storage battery class to power control apparatus 150. The power control device 150 controls the storage battery device 140 to discharge in the load following discharge mode based on the Set message.

[Fifth Embodiment]
Hereinafter, differences of the fifth embodiment from the first embodiment will be described. The fifth embodiment is the same as the first embodiment in terms of the system configuration.

  In the fifth embodiment, it is assumed that power is purchased from a specific scale electric power supplier (PPS: Power Product Supplier). Customers (enterprises, stores, etc.) can generally purchase cheaper power from PPS than ordinary power companies. In this case, the device control apparatus 200 may be BEMS (Building Energy Management System), FEMS (Factor Energy Management System), SEMS (Store Energy Management System), or the like.

  When the actual power consumption exceeds the power demand (assumed power demand) assumed by the PPS beyond the predetermined fluctuation range, the power company will supplement the power shortage. In return, PPS pays a penalty fee to the power company. Here, the predetermined fluctuation range is 3% of the assumed demand power amount in units of 30 minutes. The penalty fee is referred to as an imbalance fee (or a generation fee outside the fluctuation range).

  In order to suppress the imbalance charge, there is a method of performing maximum discharge (load following discharge) from the storage battery device 140 so that the power consumption amount of the load 120 in units of 30 minutes is within 3% of the assumed demand power amount. Conceivable. However, in such a method, since the storage battery device 140 can be discharged to the rated output, the remaining amount of electricity stored in the storage battery device 140 is exhausted early. As a result, the imbalance charge cannot be suppressed after the remaining amount of power storage is exhausted.

(Operation according to the fifth embodiment)
In the fifth embodiment, the property corresponding to the multi-DC link class includes a maximum discharge value of load following discharge. The maximum discharge value is specified by the instantaneous power value. The maximum discharge value is a value smaller than the rated output value of the storage battery device 140.

  The communication unit 210 of the device control apparatus 200 transmits a Set message requesting the setting of the maximum discharge value of the load following discharge to the power control apparatus 150. The communication unit 151 of the power control device 150 receives the Set message from the device control device 200. Based on the Set message, the control unit 152 of the power control device 150 controls the storage battery device 140 so that the discharge value of the load following discharge does not exceed the maximum discharge value.

  FIG. 9 is a sequence diagram showing an operation according to the fifth embodiment.

  As shown in FIG. 9, in step S501, the device control apparatus 200 acquires the maximum discharge value of load following discharge from the PPS. Here, it is assumed that the maximum discharge value of the load following discharge is 2.1 kW.

  In step S502, the device control apparatus 200 transmits a SetC message requesting the setting of the maximum discharge value of load following discharge to the power control apparatus 150 as a property corresponding to the multi-DC link class. In response to receiving the SetC message, the power control device 150 controls the storage battery device 140 so that the discharge value of the load following discharge does not exceed 2.1 kW.

  In step S503, the power control apparatus 150 transmits a Set Res message notifying the setting of the maximum discharge value of the load following discharge to the device control apparatus 200.

  FIG. 9 illustrates a case where the device control apparatus 200 acquires the maximum discharge value of the load following discharge from the PPS. However, the device control apparatus 200 determines the maximum discharge value of the load following discharge by prediction based on past statistical data. You may decide. For example, assuming a store, data such as date / time, outside air temperature, number of customers, power consumption transition (kW), power consumption every 30 minutes (kWh) is accumulated in advance, and past data under the conditions of the forecasting day The past power consumption of the closest condition is derived, and the past power consumption is assumed as the assumed demand power amount. Next, assuming that 30 units of power consumption is used on average, instantaneous expected demand power (kW) is obtained, and the maximum discharge of load following discharge is calculated from the difference from the transition of power consumption at that time. Determine the value.

(Summary of the fifth embodiment)
As described above, in the fifth embodiment, by setting the maximum discharge value of the load following discharge, it is possible to prevent the storage battery device 140 from discharging to the rated output and to prolong the remaining power storage capacity of the storage battery device 140. As a result, imbalance charges can be reduced over a longer period of time.

[Other Embodiments]
In each embodiment mentioned above, the case where the house was assumed as a consumer and the apparatus control apparatus 200 was HEMS illustrated. However, the device control apparatus 200 may be a CEMS (Cluster / Community Energy Management System), a BEMS (Building Energy Management System), a FEMS (Factor Energy Management System, or an Energy Management System).

  In each embodiment mentioned above, the system based on ECHONET Lite (trademark) was illustrated. However, the present invention is not limited to a system conforming to ECHONET Lite (registered trademark), and the present invention may be applied to a system conforming to another communication protocol such as ZigBee (registered trademark) or KNX.

  DESCRIPTION OF SYMBOLS 10 ... Control system, 30 ... Distribution line (electric power system), 110 ... Meter apparatus, 120 ... Load, 130 ... Solar power generation device, 131 ... PV, 132 ... DC-DC conversion part, 140 ... Storage battery apparatus, 141 ... Storage battery DESCRIPTION OF SYMBOLS 142 ... DC-DC conversion part 150 ... Power control apparatus 151 ... Communication part 152 ... Control part 153 ... DC-AC conversion part 200 ... Device control apparatus 210 ... Communication part 220 ... Control part

Claims (17)

A power control device that is provided in a consumer and controls power supply from a plurality of power supply devices,
A conversion unit capable of collectively converting DC power output from each of the plurality of power supply devices into AC;
A communication unit that communicates with an external device control device according to a predetermined communication protocol;
A control unit for controlling the plurality of power supply devices,
The communication unit receives a setting request for requesting setting of a property corresponding to a device class of the power control device from the device control device,
The control unit controls at least one of the plurality of power supply devices based on the setting request.   The power control apparatus according to claim 1, wherein the property includes a suppression value or a suppression rate of the conversion unit.   The power control apparatus according to claim 1, wherein the property includes an instantaneous input / output value of the conversion unit. The plurality of power supply devices include a storage battery device and a solar power generation device,
The property includes a charging mode of the storage battery device,
The power control apparatus according to any one of claims 1 to 3, wherein the charging mode includes a surplus charging mode in which only surplus power of the photovoltaic power generation apparatus is charged. The plurality of power supply devices include a storage battery device and a solar power generation device,
The communication unit further receives a setting request for requesting setting of a property corresponding to the device class of the storage battery device from the device control device,
The property corresponding to the device class of the storage battery device includes a charging mode of the storage battery device,
The power control apparatus according to any one of claims 1 to 3, wherein the charging mode includes a surplus charging mode in which only surplus power of the photovoltaic power generation apparatus is charged. The plurality of power supply devices include a storage battery device,
The property includes a discharge mode of the storage battery device,
6. The power control apparatus according to claim 1, wherein the discharge mode includes a load follow-up discharge mode in which discharge is performed so as to follow an increase or decrease in power consumption of a load. The plurality of power supply devices include a storage battery device,
The communication unit further receives a setting request for requesting setting of a property corresponding to the device class of the storage battery device from the device control device,
The property corresponding to the device class of the storage battery device includes a discharge mode of the storage battery device,
6. The power control apparatus according to claim 1, wherein the discharge mode includes a load follow-up discharge mode in which discharge is performed so as to follow an increase or decrease in power consumption of a load.   The power control apparatus according to claim 6 or 7, wherein the property includes a maximum discharge value of load following discharge. A device control device that controls a power control device capable of collectively converting DC power output from each of a plurality of power supply devices into AC power,
A communication unit that communicates with the power control device according to a predetermined communication protocol;
The communication unit transmits a setting request for requesting setting of a property corresponding to a device class of the power control device to the power control device.   The device according to claim 9, wherein the property includes a suppression value or a suppression rate of a conversion unit that is provided in the power control device and collectively converts DC power from the plurality of power supply devices into AC. Control device.   The said property is provided in the said power control apparatus, The instantaneous input / output value of the conversion part which converts into a alternating current the direct-current power from these power supply devices is included, The property of Claim 9 or 10 characterized by the above-mentioned. Equipment control device. The plurality of power supply devices include a storage battery device and a solar power generation device,
The property includes a charging mode of the storage battery device,
The device control apparatus according to any one of claims 9 to 11, wherein the charging mode includes a surplus charging mode in which only surplus power of the photovoltaic power generation apparatus is charged. The plurality of power supply devices include a storage battery device and a solar power generation device,
The communication unit further transmits a setting request for requesting setting of a property corresponding to a device class of the storage battery device to the power control device,
The property corresponding to the device class of the storage battery device includes a charging mode of the storage battery device,
The device control apparatus according to any one of claims 9 to 11, wherein the charging mode includes a surplus charging mode in which only surplus power of the photovoltaic power generation apparatus is charged. The plurality of power supply devices include a storage battery device,
The property includes a discharge mode of the storage battery device,
The device control apparatus according to any one of claims 9 to 13, wherein the discharge mode includes a load following discharge mode in which discharge is performed so as to follow an increase or decrease in power consumption of a load. The plurality of power supply devices include a storage battery device,
The communication unit further transmits a setting request for requesting setting of a property corresponding to a device class of the storage battery device to the power control device,
The property corresponding to the device class of the storage battery device includes a discharge mode of the storage battery device,
The device control apparatus according to any one of claims 9 to 13, wherein the discharge mode includes a load following discharge mode in which discharge is performed so as to follow an increase or decrease in power consumption of a load.   The apparatus control device according to claim 14, wherein the property includes a maximum discharge value of load following discharge. A method used in a system comprising: a plurality of power supply devices; and a power control device capable of collectively converting DC power output from each of the plurality of power supply devices into alternating current,
The power control device and the device control device perform communication according to a predetermined communication protocol, and in the communication, the property setting corresponding to the device class of the power control device is set from the device control device to the power control device. Sending the requested configuration request; and
The power control device controlling at least one of the plurality of power supply devices based on the setting request;
A method comprising the steps of:

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