JP5635335B2 - Energy management system and energy management method - Google Patents

Energy management system and energy management method Download PDF

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JP5635335B2
JP5635335B2 JP2010189592A JP2010189592A JP5635335B2 JP 5635335 B2 JP5635335 B2 JP 5635335B2 JP 2010189592 A JP2010189592 A JP 2010189592A JP 2010189592 A JP2010189592 A JP 2010189592A JP 5635335 B2 JP5635335 B2 JP 5635335B2
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load
charging
control means
power
amount
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JP2012050236A (en
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満雄 北原
満雄 北原
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大和ハウス工業株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/12Electric charging stations
    • Y02T90/121Electric charging stations by conductive energy transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y02T90/168Remote or cooperative charging operation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y02T90/169Aspects supporting the interoperability of electric or hybrid vehicles, e.g. recognition, authentication, identification or billing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12Remote or cooperative charging
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Description

  The present invention relates to an energy management system and an energy management method, and more particularly to an energy management system and an energy management method capable of managing energy consumption of a house equipped with an electric vehicle charging facility using a household power source.

  In recent years, electric vehicles and plug-in hybrid vehicles have been put into practical use as measures for reducing carbon dioxide emissions against the background of environmental problems such as global warming. Such an electric vehicle can be charged from a household power source to a battery, and energy costs can be reduced by charging at night using inexpensive nighttime power.

  Charging from the household power source of the electric vehicle is performed by connecting the charging cable to an outdoor household power source (100V or 200V outlet), and therefore, charging is performed only when the cable is connected to the outlet. Therefore, if you want to control charging at a predetermined time, such as charging at night power hours, install a business timer switch in the distribution board and set the timer switch at a preset time. By performing the on / off control, it is possible to control to charge by energizing the outlet for charging the electric vehicle only during a predetermined time period.

  However, in the on / off control using the business timer switch, it is not possible to switch on / off the outlet other than the set time, and it is not easy to change the charging time setting. That is, the outlet cannot be turned on and off immediately by a simple operation such as a button operation by the user. Furthermore, it is not possible to perform timer setting, turning on / off, and turning off by remote control from a place where a user is always present such as a living room.

  In addition, although it is conceivable to insert an outlet device with a timer (sold separately) into the outlet and turn the outlet on and off, it does not support 200V voltage or large capacity (15A to 20A) current for charging an electric vehicle. Not applicable. Further, even if it is applicable, there is a problem that control by easy operation and remote operation cannot be performed, like the above-described business timer switch.

  Apart from the widespread use of electric vehicles, energy conservation is important as a response to environmental problems, and there is increasing interest in energy conservation measures in the residential sector. On the other hand, power consumption is increasing due to the increase in household appliances used in houses and the introduction of IH (Induction Heating) cooking heaters, and it is expected that the demand for energy in ordinary households will increase further in the future due to the popularization of electric vehicles. Is done.

  Normally, a distribution board in a house is equipped with an overcurrent alarm device and a load interrupt device to prevent a power outage in the building by interrupting a preset load when an overcurrent flows to the main breaker. ing. In this case, with the overcurrent prevention function, it is not possible to shut off loads other than a preset load, and when it is not desired to shut off the load, it is necessary to change the setting each time.

  Therefore, by displaying the amount of electricity used for a certain period of time on a terminal device in a house in a time series, the user can easily and effectively grasp the change in the amount of electricity used, and by changing how to use the electrical equipment, energy is saved. A power monitoring system that can realize the effect has been proposed (see, for example, Patent Document 1).

  In recent years, HEMS (Home Energy) has been used as a means for networking energy consuming devices in homes such as home appliances and hot water supply devices to display energy usage status and to automatically control each device according to energy usage status. A Management System) has been proposed. With the introduction of HEMS, it is expected to comprehensively grasp the energy demand and supply of the entire house and to realize energy saving by operating each device efficiently.

Japanese Patent Laid-Open No. 2008-202985

  However, in the technology described in Patent Document 1, the amount of power used is measured for each branch breaker, and the change in the amount of electricity used for a certain period is displayed to encourage the user to use an electric device that is conscious of energy saving. Although it is possible, the operation of the actual electric device is left to the user, and the operation of the electric device cannot be automatically controlled by monitoring the amount of power used.

  Furthermore, although the energy management of the house by HEMS is proposed as mentioned above, the necessity of the energy management of the whole house which considered the charging energy of the electric vehicle using a household power supply is not considered. That is, there is no mechanism that allows the user to grasp the energy usage status of the entire house in addition to the charging status of the battery of the electric vehicle, and no measures are taken when the load increases in the entire house.

  Therefore, the remote control from the living room, for example, the living room, performs the timer control of the charging outlet of the electric vehicle, the immediate on / off control, the power consumption of the load equipment such as the electric equipment in the house and the charging power of the electric vehicle. In addition, it is desirable to provide a mechanism that enables comprehensive energy management and efficient operation.

  The present invention has been made in view of the above-mentioned problems, and its purpose is to adjust and block the energy consumption of load equipment in a house in a house equipped with an electric vehicle charging facility using a household power source. An object of the present invention is to provide an energy management system and an energy management method capable of preventing a power outage of the entire house due to overcurrent and managing the energy use of the entire house.

According to the energy management system of claim 1, the problem is that a charging power source for charging a battery of an electric vehicle, load power detection means for detecting power consumption amounts of a plurality of load facilities in a house, and Charge power detection means for detecting the amount of charge power from the power supply for charging to the electric vehicle, equipment operation control means capable of operation control of the plurality of load facilities, main capacity of the house , load adjustment for each load facility Storage means for storing priorities to be performed and adjusted load values for each load facility; and main control means for transmitting an instruction signal relating to operation control of the plurality of load facilities to the device operation control unit. control means, wherein the power consumption of the load power of the plurality of acquired from the detecting means load equipment, and the charged electrical energy of the electric vehicle acquired from the charging power detection unit, said storage Comparing the trunk capacity obtained from the stage, in the case within a predetermined value total power amount in the rechargeable electric power amount of the electric vehicle and the power consumption of the plurality of load facility is based on and the main trunk capacity than the trunk capacity Transmits an instruction signal instructing the apparatus operation control means to perform an operation in which the load is reduced to the adjusted load value for each corresponding load facility according to the priority , and the power consumption of the plurality of load facilities When the total power amount of the power amount and the charging power amount of the electric vehicle exceeds the predetermined value based on the main capacity, the device operation control means is instructed to stop operation for each corresponding load facility according to the priority order. This is solved by transmitting an instruction signal .

Thus, when the total power amount of the power consumption amount of the load facility and the charging power amount of the electric vehicle, that is, the power amount necessary for the entire house exceeds the main capacity and is within a predetermined value based on the main capacity , the main control means The instruction signal is received by transmitting an instruction signal instructing to perform the operation in which the load is reduced to the adjusted load value for each load facility according to the priority order for each load facility preset in the device operation control means. The equipment operation control means controls the operation of each load facility based on the instruction, and can perform an operation in which the load is reduced. By controlling the operation of the load facility in this way, the amount of power used in the entire house becomes less than the main capacity, and overcurrent can be prevented in advance.

Even if the control for reducing the load is performed, the total power amount of the power consumption of the load facility and the charging power amount of the electric vehicle, that is, the power amount required for the entire house is a predetermined value based on the main capacity, for example, the main capacity. When the value exceeds 150%, the main control means transmits an instruction signal instructing the equipment operation control means to instruct to stop the operation of the load facility, and the equipment operation control means that has received the instruction signal is based on the instruction. Stop the operation of necessary load equipment, thereby reducing the load on the entire house. As described above, when the required amount of electric power still increases even when the load of the load facility is decreased, overcurrent can be prevented in advance by controlling the operation so as to stop the operation of the load facility.

In addition, the priority order for each load equipment that performs the operation to reduce the load (load adjustment), that is, the electrical equipment is stored, and the operation of the electrical equipment is controlled in the desired order by performing the load reducing operation in that order. can do. For example, it is possible to perform suitable load control by appropriately setting priorities, such as adjusting the load with priority from lighting fixtures that do not seem to have much impact on life even if the load is reduced during the daytime Become.

At this time, as in claim 2, the main control means is configured such that the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle is a predetermined value close to the main capacity less than the main capacity. When it reaches, it is preferable to warn the user.

Further, as in claim 3, a plurality of priorities for each load facility are set according to a time zone, and the main control means is configured to select a time zone corresponding to the current time among the plurality of priorities. It is preferable to use the priority order to instruct the device operation control means to instruct the load reduction operation and to instruct the operation stop. Thereby, for example, different priorities can be set for daytime hours and nighttime hours.

  Further, according to a fourth aspect of the invention, there is provided display means capable of displaying the operating state of the load equipment, and the main control means is configured to display the load equipment according to the content of the instruction signal transmitted to the equipment operation control means. It is preferable to display the operating state.

  By displaying the operation status on the display means in this manner, the user can easily grasp the operation state, and the user can be prompted to adjust or stop the operation of the load facility.

Furthermore, the object is achieved according to the energy management method according to claim 5, an energy management method using an energy management system according to claim 1, wherein the main control means, said plurality of said load power detecting means Obtaining a power consumption amount of the load equipment, obtaining a charge power amount of the electric vehicle from the charge power detection means, obtaining a main capacity of a house from the storage means, and the main control means comprising the plurality of the sum of the power consumption of the load equipment and the total power amount of charged electrical energy of the electric vehicle, the trunk volume and comparing the charging electric energy of the electric vehicle and the power consumption of the plurality of load facility If within the predetermined value power amount is based on and the main trunk capacity than the trunk space, the main control unit, to the device operation control means, the priority Therefore transmitting an instruction signal for instructing the load until the adjusted load value for each corresponding load equipment performs the operation to reduce the power consumption of the plurality of load equipment and charging power amount of the electric vehicle When the total power amount exceeds the predetermined value based on the main capacity, the main control means sends an instruction signal for instructing the equipment operation control means to stop operation for each load facility according to the priority order. And the step of transmitting .

At this time, as in claim 6, when the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle has reached a predetermined value close to the main capacity less than the main capacity, It is preferable that the main control means includes a step of warning the user .

Further, as in claim 7, a plurality of priorities for each load facility are set in accordance with a time zone, and a step of transmitting an instruction signal instructing the device operation control means to reduce the load; In the step of transmitting an instruction signal instructing operation stop to the equipment operation control means, the main control means uses the priority order of the time zone corresponding to the current time among the plurality of priority orders, to control the equipment operation control. The instruction signal is preferably transmitted to the means .

  According to such an energy management method, when the total power consumption of the load facility and the charge energy of the electric vehicle, that is, the amount of power required for the entire house exceeds the main capacity, the load of each load facility It is possible to prevent the overcurrent from occurring by controlling the operation so that is reduced. Also, when the total power consumption of the load facility and the charging power of the electric vehicle, that is, the amount of power required for the entire house exceeds a predetermined value based on the main capacity, for example, 150% of the main capacity By stopping the operation of necessary load equipment, the load on the entire house can be reduced, and overcurrent can be prevented in advance. Further, by performing the load decreasing operation in the order of priority set in the load control information, it is possible to control the operation of the electric device in a desired order, and it is possible to perform suitable load control.

  According to the energy management system and the energy management method of the present invention, in a house having an electric vehicle charging facility using a household power source, the energy consumption of the load facility in the house is adjusted and cut off, and the entire house due to overcurrent Can be prevented in advance. That is, it is possible to manage the energy use of the entire house by controlling the power consumption of each load facility in this way.

1 is an overall configuration diagram of an energy management system according to an embodiment of the present invention. 1 is an overall configuration diagram of an energy management system. It is a hardware block diagram of a home server. It is a flowchart of an automatic charge process. It is a flowchart of an automatic charge process. It is a flowchart of an automatic charge process. It is a flowchart of an automatic charge process. It is a flowchart of a manual charge process. It is a graph which shows transition of the load current value in a house. It is explanatory drawing of load control information. It is a flowchart of a load monitoring / control process. It is a flowchart of a load monitoring / control process.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the system configuration, hardware configuration, processing flow, and the like described below are not intended to limit the present invention, and can be variously modified within the scope of the present invention.
In this specification, a user is a user of the energy management system of the present invention, and in the embodiment described below, is a resident of a house. Further, the electric vehicle is hereinafter referred to as “EV” (Electric Vehicle), and the home energy management system is hereinafter referred to as “HEMS” (Home Energy Management System).

  FIGS. 1 to 10 show an embodiment of an energy management system according to the present invention, FIGS. 1 and 2 are overall configuration diagrams of the energy management system, FIG. 3 is a hardware configuration diagram of a home server, and FIGS. Is a flowchart of the automatic charging process, FIG. 8 is a flowchart of the manual charging process, FIG. 9 is a graph showing the transition of the load current value in the house, FIG. 10 is an explanatory diagram of the load control information, and FIGS. It is a flowchart of a control process.

  As shown in FIGS. 1 and 2, the energy management system S according to the present embodiment includes a home server 1 as a main control unit, a monitor 2 as a display unit, a distribution board 3, and a power source for charging. The EV outlet 4 is configured to include a load facility 5 (5a to 5e) such as various electric devices, a CT sensor 6 as load power detection means, and a CT sensor 7 as charge power detection means. Further, a device controller 8 may be provided.

  The home server 1 as the main control means of the present embodiment is a home gateway, and performs address conversion and data transfer across different protocols of each electrical device connected to the home network 100 (broken line in FIGS. 1 and 2). The communication between devices is made possible by switching and the like, and the connection between the home network 100 and the Internet 102 is performed. The home server 1 is a server that controls the energy management system S, and controls each device connected to the home network 100, manages the power consumption of each electrical device (load facility 5), and the like. Furthermore, the home server 1 has a server function for performing authentication and the like when accessing the home network 100 from the Internet 102, and a storage function for storing information and web data acquired from each device.

  The home network 100 (broken lines in FIGS. 1 and 2) includes a home server 1, electrical equipment in a house, for example, PC equipment such as a personal computer and a printer, AV equipment such as a television and a DVD / HDD recorder, a telephone and a fax machine, etc. This is a home LAN in which telephone equipment, so-called white home appliances such as an air conditioner and a microwave oven are connected by a wired or wireless LAN. In the present embodiment, at least the home server 1, the monitor 2, the CT sensors 6 and 7, and the relay 31 provided on the distribution board 3 are connected via the home network 100. In addition, a device controller 8 as a device operation control means for controlling the operation mode and power ON / OFF of the lighting and air conditioner of each room is connected to the home server 1 via the network 100.

FIG. 3 shows a hardware configuration of the home server 1.
The home server 1 is a CPU 11 as a processing device for performing various arithmetic and control processes, a ROM 12, a RAM 13, and an HDD 14 as storage devices for storing various databases and programs, and input / output control of information between the home server 1 and the outside. And an input / output interface 15 for performing the above.

  The CPU 11 is an arithmetic processing unit that performs control and arithmetic processing of processes executed by various programs. For example, when the CPU 11 receives information about the charging mode selected by the monitor 2 dedicated to the energy management system S described later via the input / output interface 15, the CPU 11 is provided in the distribution board 3 according to the received charging mode. A process of transmitting an energization start signal or an energization end signal to the relay 31 is executed. In addition, the power consumption (current value) of each load facility 5 and EV outlet 4 is periodically received and accumulated from the CT sensors 6 and 7 via the input / output interface 15 and is necessary so that the user can check. Processing to process the information and display it on the monitor 2 is executed. Details of each process will be described later.

The ROM 12 is a storage device for storing input / output control programs and the like, and the RAM 13 is a storage device for temporarily storing data and programs necessary for executing the programs.
The HDD 14 is a storage device for storing a program for executing each process of the energy management system S and various parameters and a database necessary for executing the various programs, and is a storage unit in the present embodiment.

  For example, the HDD 14 is a program that performs a charging process when a charging mode is selected by the user, or a program that performs a display process on the monitor 2 such as the power consumption amount of the load facility 5 and the charging power amount of the electric vehicle. Etc. are remembered. In addition, as parameters, data, and databases, for example, charging start time / charging end time information when the electric vehicle is charged in the automatic charging mode, and EV state information (charging) indicating whether or not the electric vehicle is being charged. Middle / stopped), preset rated current value (main trunk capacity) of main breaker, preset warning current value / breaking current value and load control information used for house load monitoring / control, CT sensor A power information database or the like that stores a history of power consumption periodically acquired from 6 and 7 is stored.

  The input / output interface 15 inputs / outputs information between the home server 1 and the outside via the home network 100 and the Internet 102. For example, information on the charging mode selected on the monitor 2 and power information such as the power consumption measured by the CT sensors 6 and 7 are input to the home server 1. In addition, the CPU 11 outputs an energization start / energization end signal issued to the relay 31.

  In this embodiment, the monitor 2 is a monitor dedicated to the energy management system S using a wall-mounted touch panel display. The monitor 2 is usually installed in a place where a resident is present, such as a living room or a dining kitchen. The monitor 2 is connected to the home server 1 via the home network 100 and always displays the current date and time, the outside temperature, the room temperature, and the like. As for the outside air temperature and the room temperature, temperature information can be acquired from a temperature sensor (not shown) connected to the home server 1.

  In addition, the monitor 2 displays the connection status (connected / not connected) between the charging cable of the electric vehicle and the EV outlet 4. By displaying the connection status on the monitor 2, it is not necessary for the user to bother to check the connection status outdoors, and it is possible to check the connection status from within a house such as a living room.

As a method for acquiring the connection status between the charging cable and the EV outlet 4, for example, the pressure sensor 41 is attached to the EV outlet 4, and the information measured by the pressure sensor 41 when the charging cable is inserted is sent to the home server 1. The home server 1 can determine whether or not there is a connection.
Alternatively, an image sensor 43 may be provided around the EV outlet 4, the image data may be transmitted to the home server 1, and the home server 1 may perform image processing to determine whether the charging cable is connected. Good. When using image data, it is also possible to notify an abnormality when an object other than an object corresponding to a pre-registered image is inserted into the EV outlet 4, and as a function to prevent mischief and power theft Available.

  The monitor 2 further includes the current power consumption of the load facility 5 collected by the home server 1 from a CT sensor 6 serving as load power detection means, which will be described later, and the EV charging power acquired from the CT sensor 7 serving as charge power detection means. The amount and the charging status of the battery of the electric vehicle (implementing status such as charging / stopping charging, remaining charge, etc.) are displayed.

  The monitor 2 also allows the user to select the charging mode for charging the electric vehicle by operating the monitor 2. Charging mode selection designates whether charging of an electric vehicle starts automatically at a predetermined time or manually. When the charging mode is selected, the user operates the touch panel of the monitor 2 to switch from the normal display such as the temperature to the charging mode selection display, and touches one of the charging modes to select a desired charging mode. The monitor 2 accepts a selection input by the user, and transmits information on the selected charging mode to the home server 1 via the home network 100.

  In the energy management system S of the present invention, while confirming the power consumption of the load equipment 5 in the house displayed on the monitor 2 provided inside the house such as a living room as described above, it is possible to perform remote operation from the monitor 2. The charging mode of the electric vehicle can be selected. In the present embodiment, two modes of “automatic charging mode” and “manual charging mode” can be selected as the charging mode.

The “automatic charging mode” is a mode for starting / ending charging of an electric vehicle at a preset charging start time / end time. In this embodiment, in the initial setting of the system, at the charge start time / end time. The start time / end time of the night time zone where power is cheap is set. The charging start time and charging end time can be changed and input from the monitor 2 by the user as needed. In the automatic charging mode, energization of the EV outlet 4 is controlled so as to automatically start / end charging at the set charging start time / end time. As will be described later, even before the set end time, when the battery of the electric vehicle is fully charged, the charging is automatically ended.
Note that when the user selects the automatic charging mode from the monitor 2, the charging start time and the charging end time may be input by displaying an input screen.

  The “manual charging mode” is a mode in which charging of an electric vehicle is started / finished immediately when the user gives an instruction to start / end charging. This charging start / end input is also performed from the monitor 2 in the same manner. When the manual charging mode is selected on the monitor 2 and “charging start” is input, the EV outlet 4 is energized to start charging. Further, when “charging end” is input during charging, the energization of the EV outlet 4 is stopped so as to end the charging. Even if the end of charging is not input, when the battery of the electric vehicle is fully charged, the home server 1 transmits an energization stop signal to a relay 31 as an energization control means described later, thereby EV. The power supply to the outlet 4 is stopped, and charging is automatically terminated.

  In the present embodiment, the automatic charging mode is selected on the monitor 2 in the initial setting, and even when the immediate charging is started / terminated in the manual charging mode, the automatic charging mode is terminated when the immediate charging in the manual charging mode is completed. Return to. That is, it is controlled so that the automatic charging process in the automatic charging mode is always started at the preset charging start time. As a result, sudden charging is required during the day, and even if charging is performed in the manual charging mode, there is no need to perform any special operation such as changing the charging mode on the monitor 2, and the charging cable is connected to the charging outlet 4. Just connect, you can perform automatic charging in the automatic charging mode at night. In this specification, the state in which the automatic charging mode is selected on the monitor 2 includes an automatic charging mode state in which the manual charging mode is returned to the automatic charging mode.

  In addition, it is not limited to this embodiment, You may comprise so that the charge mode once selected may be maintained until there exists the change input of the charge mode by the user from the monitor 2. FIG. In that case, for example, the charging mode selected in the HDD 14 of the home server 1 is stored, the stored charging mode is referred to, and control is performed to execute either the automatic charging process or the manual charging process. That's fine.

  In the present embodiment, a dedicated monitor 2 using a touch panel display is provided as means for selecting a charging mode. However, a personal computer equipped with an input device such as a keyboard or a mouse, which is used in the home, It is also possible to use a TV, a mobile phone or the like having a web browser function. In this case, the home server 1 and each device are connected via the home network 100, and a module for realizing a display / input function dedicated to the present system is installed on each device side. The amount can be displayed.

  The distribution board 3 has a circuit for distributing the power supplied from the commercial power system to the electrical equipment and outlets in each room, and includes a main circuit breaker, an earth leakage breaker, a branch breaker, etc., and each branch circuit is distributed. It is connected to each load via an electric wire. Further, in the distribution board 3, a relay (relay) 31 is provided between the branch circuit connected to the EV outlet 4 and the distribution line.

  The relay 31 is an energization control means in this embodiment, and starts / stops energization to the EV outlet 4 by receiving an instruction signal from the home server 1 and closing / opening (ON / OFF) the switch. Control charging start / stop of electric vehicle.

  The EV outlet 4 is a charging power source for charging the electric vehicle, and is provided in the garage or outdoors. The EV outlet 4 is a 100V or 200V power source for household use, and a battery cable mounted on the electric vehicle is charged by inserting a plug of a charging cable of the electric vehicle. Although the EV outlet 4 is one of the loads in the house, in this specification, the EV outlet 4 is distinguished from the load of other electric devices, and the load facility 5 is a load other than the EV outlet 4. Shall be pointed to.

  The load facility 5 is an electric device in a house, for example, an electric device such as the lighting 5a, 5b, the air conditioners 5c, 5d, a shared outlet, and a television 5e connected to the shared outlet. For ease of explanation, the load equipment 5 is five, that is, 5a to 5e. However, the load equipment 5 is not limited to these actually, and refers to all electric devices and outlets that consume electric power (in the present specification, the above description is made). EV outlet 4 is excluded as shown in the figure).

Furthermore, in this embodiment, a CT sensor (current detector) 6 as load power detection means and a CT sensor (current detector) 7 as charge power detection means are provided.
The CT sensor 6 is attached to each distribution line between the distribution board 3 and each load facility 5 (5a to 5e), and detects the power consumption (current value) of each load facility 5. In order to facilitate the explanation, it is illustrated as a single device in FIG. 2 and is described as a CT sensor 6, but is actually attached to each distribution line from each branch circuit, and each load facility 5 (5 a ˜5e) can be detected. The CT sensor 7 is installed on a distribution line connecting the distribution board 3 and the EV outlet 4, and detects the power consumption (current value) of the EV outlet 4, that is, the charging electric energy. These CT sensors 6 and 7 are connected to the home server 1 via the home network 100. The home server 1 periodically acquires the amount of power detected by the CT sensors 6 and 7, for example, every 5 minutes, stores it in the HDD 14, and accumulates it as power information.

  In this embodiment, the home server 1 is connected to each of the CT sensor 6 for measuring the power consumption amount of the load facility 5 and the CT sensor 7 for measuring the charged energy amount of the EV outlet 4, and the home server 1 Each power amount is configured to be acquired, but a measuring instrument that collects and accumulates information of each of the CT sensors 6 and 7 is separately provided and connected to the home server 1, and the home server 1 receives information from the measuring instrument. You may comprise so that it may acquire collectively.

  The device controller 8 is a device operation control means in the present embodiment, and is a control device having an infrared remote control function, and controls an electric device that can be controlled to be turned on / off, operated, etc. by an infrared remote control signal. In the present embodiment, the device controller 8 is connected to the home server 1 via the home network 100, and based on instructions from the home server 1, the power ON / OFF of the lights 5 a and 5 b, the dimming control, the air conditioner The power ON / OFF of 5c, 5d and operation mode control, and the power ON / OFF of the television 5e and screen setting (normal mode / power saving mode) can be controlled. In the load monitoring / control processing described later, the home server 1 monitors the power consumption (electric consumption) in the house, and controls the operation of each load facility 5 from the device controller 8 according to the instruction of the home server 1. The amount of power used by each load facility 5 is adjusted. With this control, it is possible to prevent a power failure of the entire house due to overcurrent.

Next, charging control by the energy management system S will be described.
The CPU 11 of the home server 1 executes an automatic charging process in the automatic charging mode, and executes a manual charging process in the manual charging mode. In the present embodiment, the automatic charging process is normally executed in the automatic charging mode. When the user switches to the manual charging mode and inputs the start of charging, the manual charging process is started and executed, and the manual charging process is performed. When finished, the automatic charging process is performed by returning to the automatic charging mode. Hereinafter, although the flow of each processing based on this embodiment is explained, it is not limited to this, and the same charging mode is maintained and only the corresponding charging processing is executed until the charging mode change input is performed. It can also be controlled.

The automatic charging process and the manual charging process will be described with reference to FIGS. 4 to 7 show a flow of automatic charging processing, and FIG. 8 shows a processing flow of manual charging processing.
The automatic charging process is always executed at predetermined intervals by the CPU 11 of the home server 1.
In the automatic charging process, first, a preset charging start time and charging end time are acquired from the HDD 14 (step S1), and the current time is acquired from the own clock function in the home server 1 (step S2). The time is compared with the charge start time and the charge end time (step S3). And when the current time is after the charging start time and before the charging end time (charging start time <= current time <charging end time) (step S3; Yes), that is, when the current time is included in the charging time zone, When the charging process is executed (step S4) and the charging process is completed, the process returns to the top of the automatic charging process.

  In the comparison of the current time with the charge start time and the charge end time in step S3, if the current time is before the charge start time or after the charge end time (step S3; No), that is, the current time is in the charge time zone. If not included, an EV energization stop signal is transmitted to the relay 31 in order to stop charging when charging is not performed or charging is performed (step S5). Then, the EV state information stored in the HDD 14 is updated to “stopped” (step S6), and “not charged” is displayed on the screen of the monitor 2 to notify the user of the charging status (step S7). Return to the top of the automatic charging process.

  The EV state information indicates whether or not the electric vehicle is being charged, that is, whether the electric vehicle is being charged or not, and is stored in the HDD 14 and is based on a predetermined condition in the charging control process. Information to be updated.

  The processing on the relay 31 side when the EV energization stop signal is transmitted from the CPU 11 to the relay 31 in step S5 is as follows. When the relay 31 receives the EV energization stop signal from the home server 1, the relay 31 turns off the switch connected to the EV outlet 4. As a result, energization of the EV outlet is stopped, and charging of the electric vehicle is stopped.

In the charging process of step S4, EV state information is first acquired from the HDD 14 (step S11). When the EV state information is “charging” (step S12; Yes), the EV charging power amount (current value) is acquired (step S13). Specifically, an EV charging power amount request signal is transmitted from the CPU 11 to the CT sensor 7 as charging power detection means for measuring the current of the EV outlet 4, and the EV charging power amount is received from the CT sensor 7. Alternatively, since the home server 1 periodically acquires the current value of the EV outlet 4 from the CT sensor 7 and stores it in the HDD 14, the stored information may be referred to.
When the EV state information is other than charging, that is, when the EV state information is stopped (step S12; No), an initial value is set as the EV charging electric energy, and zero is set in this embodiment (step S14). This is because the amount of charge power is always zero during periods other than charging.

  Next, the house load power amount (current value) that is the total power consumption amount of the load equipment 5 in the house is acquired (step S15). Specifically, a housing load power amount request signal is transmitted from the CPU 11 to the CT sensor 6 as load power detection means that measures the current of the load equipment 5 in the house disposed on the distribution board 3 side. The housing load power amount is received from the CT sensor 6. Alternatively, since the home server 1 periodically acquires the current value of the load facility 5 from the CT sensor 6 and stores it in the HDD 14, the stored information may be referred to.

  Then, the preset rated current value (main capacity) of the main breaker is acquired from the HDD 14 (step S16), and the total power consumption, that is, the total value of the EV charging electric energy and the residential load electric energy, and the main capacity. Are compared (step S17). When the total value of the EV charging energy and the residential load energy is smaller than the main capacity, the main capacity has a margin, so the electric vehicle can be charged. However, the total of the EV charging power and the residential load power is possible. When the value is greater than or equal to the main capacity, the main capacity is not sufficient, and there is a possibility of overcurrent if the electric vehicle is charged. Therefore, it is necessary to control not to charge.

  Therefore, when the total value of the EV charging electric energy and the residential load electric energy is equal to or larger than the main capacity (step S17; EV charging electric energy + housing load electric power> = main capacity), that is, when the main capacity has no margin, In order to stop charging, an EV energization stop signal is transmitted to the relay 31 (step S18). Then, in order to notify the user of the charging status, the display of “charging is stopped due to overload” is displayed on the screen of the monitor 2 (step S19), and the EV state information stored in the HDD 14 is updated to “stopping”. (Step S20), the process is terminated and the process returns to the beginning of the automatic charging process. The process when the relay 31 receives the EV energization stop signal from the home server 1 is the same as the process described above.

  On the other hand, as a result of the comparison in step S17, the CPU 11 determines that the total value of the EV charging electric energy and the residential load electric energy is smaller than the main capacity (step S17; EV charging electric energy + residential load electric energy <main capacity). The initial charge power amount is acquired from the HDD 14 (step S21).

  The initial charge power amount is a preset first threshold value (current value) used for determining that the battery of the electric vehicle is fully charged, and is stored in the HDD 14. The EV charging power amount at that time is compared with the initial charging power amount, and it is determined that the battery is not fully charged while the EV charging power amount is equal to or greater than the initial charging power amount. This is because the current value supplied to the battery is large when the remaining charge of the battery is low and the battery is charged, and the current value supplied to the battery decreases as the battery is charged. It is.

  The acquired EV charging energy is compared with the initial charging energy (step S22), and the EV charging energy is equal to or higher than the initial charging energy (EV charging energy> = initial charging energy) (step S22; Yes). ), That is, if it is determined that the battery is not fully charged, it is determined whether or not the EV state information acquired in step 11 is being charged (step 23). If the EV state information is other than being charged, that is, is stopped (step S23; No), an EV energization start signal is transmitted to the relay 31 to start charging (step S24). In order to inform the user of the charging status, “charging” is displayed on the screen of the monitor 2 (step S25), and the EV state information of the HDD 14 is updated to “charging” (step S26). To return to the beginning of the automatic charging process.

  If the EV state information is being charged in step S23 (step 23; Yes), the charging is continued, and the process returns to the top of the automatic charging process.

  The processing on the relay 31 side when the EV energization start signal is transmitted from the CPU 11 to the relay 31 in step S24 is as follows. When the relay 31 receives the EV energization start signal from the home server 1, the relay 31 turns on a switch connected to the EV outlet 4. Thereby, energization to the EV outlet 4 is started, and charging of the electric vehicle is started.

  As a result of the comparison in step S22, when the EV charge energy is less than the initial charge energy (EV charge energy <initial charge energy) (step S22; No), there is a possibility of full charge. It is determined whether the battery is fully charged in consideration of the charging time. Therefore, the full charge deemed time is acquired from the HDD 14 (step S27), and the total charge time obtained by accumulating the continuous charging time is compared with the full charge deemed time (step S28).

  The full charge time is a standard time required until the battery of the electric vehicle is fully charged, and is preset in the initial setting of the system and stored in the HDD 14. Further, the total charging time can be obtained by storing the accumulated value of the time during which the CPU 11 is continuously charging in the storage area of the RAM 13 and updating it at a predetermined interval. When this total charge time is equal to or greater than the full charge time (total charge time> = full charge time) (step S28; Yes), it is determined that the battery is fully charged, and EV energization is stopped to stop charging. A signal is transmitted to the relay 31 (step S31). Then, the EV state information of the HDD 14 is updated to “stopped” (step S32, “full charge” is displayed on the screen of the monitor 2 to notify the user of the charging status (step S33), and this process is terminated. The process when the relay 31 receives the EV energization stop signal from the home server 1 is the same as the process described above.

  As a result of the comparison in step S28, if the total charge time has not reached the full charge time (total charge time <full charge time) (step S28; No), the charge end power amount is acquired from the HDD 14 (step S29). . The charge end power amount is a preset second threshold value (current value) used to determine that the battery of the electric vehicle is fully charged, and is stored in the HDD 14. Even when the total charge time has not reached the full charge time, the EV charge power amount at that time is compared with this charge end power amount, and the EV charge power amount is equal to or less than the charge end power amount. Determines that the battery is fully charged, and determines that the battery is not fully charged if the EV charge energy is greater than the charge end energy.

When the EV charge power amount is compared with the charge end power amount (step S30), and the EV charge power amount is equal to or less than the charge end power amount (EV charge power amount <= charge end power amount) (step S30; Yes), the battery In order to end the charging, the process proceeds to step S31 to perform the processes of steps S31 to S33, ends the process, and returns to the top of the automatic charging process.
When the EV charging power amount is larger than the charging end power amount (EV charging power amount> charging end power amount) (step S33; Yes), this process is terminated as it is, and the process returns to the top of the automatic charging process.

  As described above, the automatic charging process is executed by the CPU 11 of the home server 1 in the automatic charging mode, and the electrification control of the EV outlet 4 is performed, so that the battery of the electric vehicle is charged at the preset charging start time. Control is started to end charging when the battery is fully charged even if it is before or after the charging end time. In the case where the automatic charging process is repeatedly executed, it is possible to wait for a predetermined time, for example, 1 minute before returning to the beginning of the automatic charging process, and then control to return to the beginning of the process and restart the process. Will improve.

Next, the manual charging process will be described.
When the user selects the manual charging mode on the monitor 2 and inputs charging start, a manual charging start signal is transmitted from the monitor 2 to the home server 1. When receiving the manual charge start signal, the CPU 11 of the home server 1 executes the manual charge process.

  The manual charging process is a process for immediately starting charging, and first, it is determined whether or not there is an input for ending the manual charging process (step S51). When the user wants to end the charging during the charging in the manual charging mode, the charging can be ended by inputting the charging end from the monitor 2. When the user inputs charging end on the monitor 2, a manual charging end signal is transmitted from the monitor 2 to the home server 1. When the CPU 11 receives the manual charging end signal, it is temporarily stored in a storage area such as the RAM 13 and is determined with reference to this information in step S51.

When the end input of the manual charging process is not performed (step S51; No), the charging process S52 is executed. This charging process S52 is the same process as the charging process S4 in the automatic charging process (see FIGS. 5 to 7). As described above, in the manual charging process, when the user selects the manual charging mode, the energization control of the EV outlet 4 is performed based on the EV charging power amount, the house load power amount, the main capacity, etc. Control is performed so that charging of the battery of the electric vehicle is started, and charging is ended when the battery is fully charged or when the user inputs an end input.
The process when the relay 31 receives the EV energization start signal or the EV energization stop signal from the home server 1 is the same as that in the above-described automatic charging process.

  Then, it is determined whether or not the battery is fully charged (step S53). For example, when the EV state information is updated in step S32 of the charging process S52 (S4), the determination of the full charge is performed by storing the fact that the battery is “full charged” in addition to being stopped. It becomes possible. When the battery is fully charged (step S53; Yes), the process proceeds to the automatic charging process. At this point, the manual charging process is substantially finished. If the battery is not fully charged (step S53; No), the process returns to the beginning of the manual charging process, and the charging process S52 is repeatedly executed until the battery is fully charged or until the user inputs an end of the manual charging process.

  When the end input of the manual charging process is performed in step S51 (step S51; Yes), the process proceeds to the automatic charging process. At this point, the manual charging process is substantially finished. By proceeding to the automatic charging process in this way, even after charging in the manual charging mode, the automatic charging process is executed at a predetermined charging start time set in advance.

  As described above, in the energy management system S of the present invention, it is possible to select whether to charge the electric vehicle automatically or manually, and the optimum time zone while considering the power consumption of the entire house. In addition, the electric vehicle can be charged. Further, the charging mode can be easily changed and immediate charging can be easily performed by remote operation using the monitor 2.

Furthermore, in the energy management system S of the present embodiment, the home server 1 monitors the power consumption (electric consumption) of the load equipment 5 and the EV outlet 4 in the house, and warns when the electric usage approaches the main capacity. Control to automatically control or shut off the load when an overcurrent occurs. Such automatic control prevents an overcurrent from occurring, the main breaker from dropping, and the entire house from being interrupted.
The load monitoring / control function of the home server 1 will be described below. FIG. 9 is a graph showing the transition of the load current value in the house, and FIG. 10 shows the load control information.

1. Warning function As a result of using many load equipments 5 and EV outlets 4 at the same time, an overcurrent is generated, and the main breaker is cut off and the entire house is prevented from power failure. When the warning electric current value which is a predetermined current value set in advance (the sum of the load electric energy and the EV charging electric energy) reaches a warning current value, the user is notified of the possibility of overcurrent. The warning current value is a current value less than the rated current value of the main breaker (main trunk capacity: main current value in FIG. 9) and close to the main capacity. For example, a value of 90% of the main capacity can be set. This warning to the user can be performed, for example, by displaying a warning on the monitor 2 and outputting a warning sound from the speaker of the monitor 2 or sounding a buzzer. By giving such a warning, it is possible to urge the user to stop using unnecessary electrical equipment by his / her own operation. For example, this warning is given at points a and b in the graph shown in FIG.

2. Automatic load control function Even if a warning is given, if you continue to use electrical equipment etc., and the total electricity usage exceeds the main capacity, and the current value that exceeds the main capacity is within the specified value, Control is performed to automatically reduce the amount of electricity used by each load facility 5 to a preset current value. For example, such control that reduces the load of each load facility 5 is performed at the point c in the graph shown in FIG. In this embodiment, the predetermined value used for the determination of the current value here is the same value as the cutoff current value used for determining whether or not the automatic load cutoff function described later is required.

In order to execute load control for each load facility, load control information as shown in FIG. 10 can be set in advance. Each value of the load control information is set in advance by the user and stored in the HDD 14.
The load control information of this embodiment includes at least load equipment in a house, power consumption for each load equipment, qualified current value, minimum load current value after load adjustment, daytime load adjustment priority, night load The adjustment priority order is stored. Note that the setting items and setting values of the load control information shown in FIG. 10 are examples, and necessary items can be set as appropriate so that desired control can be performed.

For example, in this embodiment, as the load equipment 5 subject to load control, an illumination 5a, an illumination 5b, an air conditioner 5c, an air conditioner 5d, and a television 5e are set, and information on the EV outlet 4 is also set. The rated current values of the load equipment 5 (5a to 5e) and the EV outlet 4 are 3A (A: ampere, the same applies hereinafter), 2A, 20A, 30A, 5A, 20A, and the main current value is 50A. In addition, 1A, 1A, 10A, 15A, 3A, and 20A are set as the adjusted minimum load current values of the load facilities 5 (5a to 5e) and the EV outlet 4, respectively. Further, the daytime load adjustment priority and the nighttime load adjustment priority are set for the lighting 5a, the lighting 5b, the air conditioner 5c, the air conditioner 5d, and the television 5e, respectively.
In the present embodiment, the power consumption of the EV outlet 4 is given the highest priority. That is, the EV outlet 4 is not subject to load control, the adjusted minimum load current value is set to the same value as the rated current value, and no daytime and nighttime load adjustment priority is set.

  When all the loads are used at the same time, the total load when each load facility 5 and EV outlet 4 is operated at the minimum load is 50A. That is, the total of the adjusted minimum load current values is set to be equal to or less than the main capacity. The home server 1 checks the amount of electricity used by each load facility 5 and EV outlet 4 actually used at a predetermined interval and the total amount of electricity used, and only the current value that exceeds the main capacity, An instruction for adjusting any or all of the load facilities 5 within the range of the adjusted minimum load current value is transmitted to the device controller 8 in accordance with the load adjustment priority in the daytime or nighttime.

  Adjustment methods for each load equipment 5 include power ON / OFF of the lights 5a and 5b and dimming control, power ON / OFF of the air conditioners 5c and 5d and operation mode control, power ON / OFF of the television 5e and screen setting. The amount of electricity used is adjusted by controlling (normal mode / power saving mode). The device controller 8 controls the power ON / OFF of each load facility 5 and the operation mode based on an instruction from the home server 1, thereby preventing a power failure of the entire house due to overcurrent. .

  Although the priority order of the load facility that performs load adjustment is set in advance, it is possible to set a plurality of priority orders according to conditions. In the present embodiment, as described above, the load adjustment priority order for the daytime time zone and the nighttime time zone is set. For example, as shown in FIG. 10, the priority order of load adjustment in the daytime is the order of the lighting 5a, the lighting 5b, the air conditioner 5c, the air conditioner 5d, and the television 5e. Settings such as the order of priority of adjustment may be the order of the air conditioner 5c, the air conditioner 5d, the television 5e, the illumination 5a, and the illumination 5b.

  In addition, when the load is automatically adjusted on the home server 1 as described above, the adjustment target device and the state after adjustment (power ON / OFF, operation mode, etc.) are displayed on the monitor 2 as the adjusted contents. So that the user can confirm. Such a display makes it possible to grasp the state after being automatically adjusted, and to urge the user to stop using unnecessary electrical devices by the user's own operation.

3. Automatic load cut-off function When an overcurrent occurs even if control is performed to adjust the load by lowering the load, the load equipment 5 is automatically cut off sequentially in the order set in advance. For example, at the point d in the graph shown in FIG.
The home server 1 compares the total electricity usage with the main capacity, and when the total electric usage exceeds a cutoff current value, which is a predetermined value preset for the main capacity, the load is adjusted according to the load adjustment priority. An instruction is transmitted to the device controller 8 to shut off the equipment 5. As the breaking current value, for example, a value of 150% of the main capacity can be set. Based on the received instruction, the device controller 8 transmits an infrared remote control signal for turning off the power to the corresponding load facility 5 and shuts off the power of the load facility 5. The load facility 5 is sequentially turned off in accordance with the load adjustment priority order until the power consumption becomes equal to or less than the main capacity.

4). Automatic load recovery function In the energy management system S, it is possible to set whether or not to perform automatic recovery. If it is set to automatically return, if the state where the total electricity usage is less than or equal to the preset return current value due to automatic load adjustment and automatic shutoff, continues for a predetermined time or more, The load facility 5 is automatically energized and restored. For example, such automatic return control is performed at point e in the graph shown in FIG.

  The home server 1 compares the total electricity consumption with a preset return current value, and if the state where the overall electricity consumption is less than or equal to the restoration current value continues for a predetermined time or longer, the power supply An instruction is transmitted to the equipment controller 8 so that the power supply of the load facility 5 is sequentially restored in the reverse order of the order in which the power is cut off. On the basis of the received instruction, the device controller 8 transmits an infrared remote control signal for turning on the power of the corresponding load facility 5 to restore the power of the load facility 5.

Next, load monitoring / control processing executed by the CPU 11 of the home server 1 will be described with reference to flowcharts shown in FIGS. This load monitoring / control process is repeatedly executed at predetermined intervals by the CPU 11 of the home server 1.
The CPU 11 uses the electric power consumption (EV charging electric energy) of the EV outlet 4 regularly acquired from the CT sensor 7 and the electric power consumption (housing load) of the load facility 5 periodically acquired from the CT sensor 6. The amount of power is acquired from the HDD 14 (step S71, step S72). The EV charging electric energy and the residential load electric energy may be acquired by transmitting a transmission request directly to the CT sensor 7 and the CT sensor 6, respectively.

  Then, the master capacity and the overcurrent determination value set in advance are acquired from the HDD 14 (step S73, step S74). The overcurrent determination value is a determination value for monitoring the total amount of electricity used (the sum of residential load energy and EV charging energy) and performing control based on the amount of electricity used. Contains a value. The warning current value is a threshold value for determining whether or not to issue a warning when the total electricity usage approaches the main capacity, and is a current value less than the main capacity and close to the main capacity, for example, 90% of the main capacity. Value is set. The cut-off current value is a threshold value for determining to cut off the load when the total electricity usage becomes larger than the main capacity by a certain value, for example, a value of 150% of the main capacity is set. . In step S74, instead of acquiring the warning current value and the cutoff current value from the HDD 14, the CPU 11 uses the warning current value and the cutoff current based on a predetermined ratio (eg, 90%, 150%) to the main capacity and the main capacity. The value may be calculated.

  Comparing the total power usage amount and the warning current value (step S75), if the power usage amount is less than the warning current value (step S75; Yes), refer to the load state information and if the load state information is normal (Step S76; Yes) Since there is a surplus in the main capacity, the processing returns to the top as it is. The load status information indicates the operating status of the load facility 5 such as normal, warning, adjustment, and stoppage, and is stored in the HDD 14 and updated in the load monitoring / control processing. is there.

  If the load status information is not normal (step S76; No), it indicates that a warning has been issued in the load monitoring / control process or that some control has been performed on the load facility 5. In order to return the operation of the facility 5 to normal operation, a load operation return instruction signal is transmitted to the device controller 8 (step S77), the load state information is updated to “normal” (step S78), and the load on the monitor 2 is normal It is displayed that the operation is being performed (step S79).

  Upon receiving the load operation return instruction signal from the CPU 11, the device controller 8 transmits an infrared signal based on the content of the instruction to turn on the power of the target load facility 5 or return to the normal operation mode. .

  When the total power usage amount is equal to or greater than the warning current value in the comparison in step S75 (step S75; No), the CPU 11 further compares the total power usage amount with the main capacity (step S80). If the total power consumption is less than or equal to the main capacity (step S80; No), no overcurrent has occurred, but there is a possibility of overcurrent, so a warning is displayed on the monitor 2 (step S81). ), The load state information is updated to “warning” (step S82), and the process returns to the top. If the total power consumption is larger than the main capacity (step S80; Yes), load control information is acquired from the HDD 14 (step S83). Then, the total power usage amount is compared with the cutoff current value (step S84).

  When the total power consumption is equal to or less than the cut-off current value (step S84; No), the load adjustment priority of the equipment is adjusted based on the acquired load control information in order to reduce the load by adjusting the operation of the load facility 5. Then, according to the adjusted minimum load power amount, a load operation adjustment instruction signal for adjusting the operation of the target load facility 5 is transmitted to the device controller 8 (step S85). Thereafter, the load state information is updated to “adjusting” (step S86), the operation mode of the target load facility 5 and the operation being performed during adjustment are displayed on the monitor 2 (step S87), and the top of the process Return to. As for load adjustment priorities, as shown in FIG. 10, when the priorities of daytime and nighttime are set in the load control information, daytime or nighttime is determined from the current time, and the current time corresponds. Priorities can also be used.

  When the device controller 8 receives the load operation adjustment instruction signal from the CPU 11, the device controller 8 transmits an infrared signal to the load facility 5 as a load adjustment target based on the content of the instruction, and adjusts the operation mode of the load facility 5.

  When the total power consumption exceeds the breaking current value in the comparison in step S84 (step S84; Yes), the CPU 11 shuts off the power supply of the load facility 5 and stops the operation, so that it is based on the acquired load control information. Then, according to the load adjustment priority order of the device, the operation of the target load facility 5 is stopped, that is, a load operation stop instruction signal for turning off the power is transmitted to the device controller 8 (step S88). Thereafter, the load state information is updated to “stopped” (step S89), the monitor 2 displays that the operation of the target load facility 5 is stopped (step S90), and the process returns to the top. Regarding load adjustment priority, as shown in FIG. 10, when each daytime and nighttime priority is set in the load control information, the priority corresponding to the current time can be used. This is the same as the operation mode adjustment of the load facility 5.

  Upon receiving the load operation stop instruction signal from the CPU 11, the device controller 8 transmits an infrared signal to the load equipment 5 to be blocked based on the content of the instruction, and turns off the power of the load equipment 5.

  Since this load monitoring / control process is repeatedly executed at a predetermined interval, even when the load facility 5 is shut off or the operation is adjusted, if the overall power consumption becomes less than the warning value, the automatic load recovery is performed. The operation of the load facility 5 is returned to normal operation by the function.

  In this way, the energy management system S has a function of controlling or blocking the load facility 5 by monitoring the total power consumption (electric consumption) in the house. By this control, it is possible to perform appropriate power consumption in the house, and it is possible to prevent the main house breaker from being interrupted and the entire house from being interrupted.

  In addition, a photovoltaic power generation system or a storage battery system can be introduced into a house and incorporated into the energy management system S. When a solar power generation system or a storage battery system is installed, the current power generation amount, power sale amount, power purchase amount, power consumption amount, remaining amount of power stored in the storage battery, “currently buying”, “currently selling” "Can be displayed so that the user can confirm the information. Furthermore, it is also possible to display a history such as daily performance and monthly performance related to the amount of electric power, and use of electric equipment etc. while checking the actual amount of power such as power generation and consumption. It can be controlled to save power. Moreover, the electric power generated in the house can be used for charging the electric vehicle, and the electric power can be used effectively.

  As described above, according to the energy management system of the present invention, the charging / discharging timer control and the immediate switching control of the electric vehicle can be performed by an easy remote operation from the monitor in the house. . In addition, in a house equipped with an electric vehicle charging facility using a household power source, it is possible to check the electricity usage status of the electric vehicle charging outlet and each load facility, and control the power consumption of each load facility. This makes it possible to manage the energy use of the entire house. In addition, the power consumption of the load equipment in the house can be adjusted and cut off to prevent a power outage of the entire house due to overcurrent.

S Energy management system 1 Home server (main control means)
2 Monitor (display means)
3 Distribution board 4 EV outlet 5 (5a to 5e) Load facility 6 CT sensor (load power detection means)
7 CT sensor (charging power detection means)
8. Equipment controller (equipment operation control means)
11 CPU
12 ROM
13 RAM
14 HDD (storage means)
15 I / O interface 31 Relay 41 Pressure sensor 43 Image sensor 100 Home network 102 Internet

Claims (7)

  1. A charging power source for charging the battery of the electric vehicle;
    Load power detection means for detecting power consumption of a plurality of load facilities in a house;
    Charging power detection means for detecting the amount of charging power from the charging power source to the electric vehicle;
    Equipment operation control means capable of operation control of the plurality of load facilities,
    Storage means for storing the main capacity of the house, the priority for performing load adjustment for each load facility, and the adjusted load value for each load facility ;
    And a main control means for transmitting an instruction signal relating to the operation control of a plurality of load equipment in the equipment operation control means,
    The main control means includes
    Comparing the power consumption of the plurality of load facilities acquired from the load power detection means, the charge power amount of the electric vehicle acquired from the charge power detection means, and the main capacity acquired from the storage means;
    When the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle exceeds the main capacity and is within a predetermined value based on the main capacity, the priority is given to the device operation control means. Sending an instruction signal instructing to perform an operation in which the load is reduced to the adjusted load value for each corresponding load facility according to the rank ,
    When the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle exceeds the predetermined value based on the main capacity, the device operation control means corresponds to the priority order. An energy management system that transmits an instruction signal that instructs operation stop for each load facility .
  2. The main control means warns the user when the total power amount of the power consumption of the plurality of load facilities and the charging power amount of the electric vehicle reaches a predetermined value close to the main capacity less than the main capacity. The energy management system according to claim 1, wherein:
  3. A plurality of priorities for each load facility are set according to the time zone,
    The main control means instructs the equipment operation control means to perform the load reduction operation and the operation stop using the priority order of the time zone corresponding to the current time among the plurality of priority orders. The energy management system according to claim 1 or 2.
  4. Comprising a display means capable of displaying the operating state of the load equipment,
    The energy according to any one of claims 1 to 3, wherein the main control means displays an operation state of the load facility according to the content of the instruction signal transmitted to the equipment operation control means. Management system.
  5. An energy management method using the energy management system according to claim 1,
    The main control means acquires the power consumption amount of the plurality of load facilities from the load power detection means, acquires the charge power amount of the electric vehicle from the charge power detection means, and the main capacity of the house from the storage means Step to get the
    The main control means comparing the main capacity with the total power amount of the power consumption amount of the plurality of load facilities and the charge power amount of the electric vehicle;
    When the total amount of power consumption of the plurality of load facilities and the amount of charging power of the electric vehicle exceeds the main capacity and is within a predetermined value based on the main capacity, the main control means is configured to operate the device. Transmitting an instruction signal instructing the control means to perform an operation in which the load is reduced to the adjusted load value for each corresponding load facility according to the priority ;
    When the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle exceeds the predetermined value based on the main capacity, the main control means, the equipment operation control means, Transmitting an instruction signal for instructing to stop the operation for each corresponding load facility according to the priority order .
  6. When the total power amount of the power consumption amount of the plurality of load facilities and the charging power amount of the electric vehicle reaches a predetermined value close to the main unit capacity less than the main unit capacity, the main control unit warns the user. The energy management method according to claim 5, further comprising the step of:
  7. A plurality of priorities for each load facility are set according to the time zone,
    In the step of transmitting an instruction signal for instructing an operation for reducing the load to the equipment operation control means and the step of sending an instruction signal for instructing an operation stop to the equipment operation control means, the main control means is configured to transmit the plurality of priority The energy management method according to claim 5 or 6, wherein the instruction signal is transmitted to the device operation control means by using a priority of a time zone corresponding to the current time among the ranks.
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US9306412B2 (en) * 2012-03-30 2016-04-05 Toyota Jidosha Kabushiki Kaisha Optimum charging for electric-based vehicle
JP6047915B2 (en) * 2012-05-01 2016-12-21 ソニー株式会社 Energy management apparatus and energy management method
KR101353904B1 (en) 2012-07-26 2014-01-22 주식회사 피엠그로우 Electric vehicle charging system and method interworking with power management system
JP6046943B2 (en) * 2012-07-31 2016-12-21 ミサワホーム株式会社 Home management expansion system
JP2014033517A (en) * 2012-08-02 2014-02-20 Misawa Homes Co Ltd Charging system
KR101509336B1 (en) * 2013-09-16 2015-04-07 엘에스산전 주식회사 Electric vehicle charging system
WO2015079493A1 (en) * 2013-11-26 2015-06-04 三菱電機株式会社 Energy management system, power measuring device, load device, communication adapter, system controller, energy management method, and program
JP2015154617A (en) * 2014-02-14 2015-08-24 未来工業株式会社 Power generation facility monitoring system
US10220719B2 (en) 2014-11-17 2019-03-05 Siemens Industry, Inc. EVSE-based energy automation, management, and protection systems and methods
WO2017090173A1 (en) * 2015-11-27 2017-06-01 三菱電機株式会社 Control device, charging information display method and program

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