JP6174844B2 - Power supply control device - Google Patents

Description

  The present invention relates to a power supply control device that controls electric power supplied to a building.

  For some time, there has been technology to limit the power supplied to houses connected to the power supply network.

  For example, in the technique described in Patent Document 1, a method and system is proposed in which a management server controls the supply of power according to a power rate determined in a contract with respect to a load of each consumer connected to a power supply network. ing.

JP 2003-199249 A

  However, the technique described in Patent Document 1 has a problem of controlling power supply to each consumer without considering that a means for storing surplus power is installed in each consumer.

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to provide a power supply control device that controls charging / discharging of means for storing surplus power in a building according to the amount of power used.

In order to solve the above-mentioned problem, the invention of claim 1 is the amount of electric power used by the grid power allowed in a building to which grid power and power generated by natural energy are supplied via a distribution board, and Acquisition means for acquiring, from the information center, allowable power consumption calculated from past power consumption of each building with respect to power consumption of the entire area where a plurality of buildings exist, and power consumption of the grid power of the building Power consumption calculating means for calculating the amount, power consumption determining means for determining whether or not the power consumption of the system power of the building is less than or equal to the allowable power consumption, and power generation using the system power and the natural energy Storage amount measuring means for measuring the storage amount of the storage battery that stores the stored power, the magnitude relationship between the allowable use power amount and the use amount of the grid power of the building, and the storage amount of the storage battery There are, and control means for controlling the charging and discharging of the battery.

  According to the first aspect of the present invention, since charging / discharging of the storage battery is controlled depending on whether or not the power usage amount of the system power is within an allowable level, the surplus power in the building is stored according to the power usage amount. The charging / discharging of the means can be controlled.

  According to a second aspect of the present invention, in the first aspect of the invention, the control means is configured such that the power consumption of the system power of the building exceeds the allowable power consumption, and the power storage amount of the storage battery is equal to or greater than a lower limit value. In this case, the storage battery is discharged, and the electric power obtained by the discharge is supplied to the building through the distribution board.

  According to the second aspect of the present invention, the power obtained by discharging the storage battery can be used in a building when the amount of system power used exceeds an allowable level.

The invention of claim 3, further comprising the invention according to claim 1 or 2, and a display means for displaying information, comprising: storage means for storing the priority of a plurality of power loads means of the building, the said When the power consumption of the grid power of the building exceeds the allowable power consumption, the control means displays a display on the display means that recommends stopping the power load means defined in the lower order in the priority order. Display.

  According to the third aspect of the present invention, it is possible to display an instruction to stop the power load means having a low priority when the power usage amount of the system power exceeds an allowable level.

The invention of claim 4 further comprises storage means for storing in advance priorities of a plurality of branch circuits for branching the supplied power from the distribution board in the invention of claim 1 or 2 ,
The control means cuts off the power supply to the branch circuit defined in the lower order in the priority order when the power consumption of the grid power of the building exceeds the allowable power consumption.

  According to the fourth aspect of the present invention, it is possible to stop the power supply to the branch circuit having a low priority when the power consumption of the system power exceeds an allowable level.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the acquisition means further acquires information on a charge of the grid power of the building from the information center, and the control means Is the charge in the information on the charge of the grid power of the acquired building when the power consumption of the grid power of the building is less than or equal to the allowable power consumption and the storage amount of the storage battery is less than the upper limit value Is determined to be less than or equal to a predetermined value, and if the charge is equal to or less than the predetermined value, control is performed to charge the storage battery until the storage amount of the storage battery reaches an upper limit value.

  According to the fifth aspect of the present invention, the storage battery can be charged when the system power charge is cheap.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, when the storage amount of the storage battery is equal to or greater than an upper limit value, the control unit is configured to obtain a charge in the acquired power information of the system power of the building. It is determined whether or not it is equal to or less than a predetermined value, and when the charge exceeds the predetermined value, the storage battery is controlled to be discharged until the amount of power stored in the storage battery becomes a minimum.

  According to the sixth aspect of the present invention, the storage battery can be discharged when the system power charge is expensive.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the control means is connected to the distribution board by a vehicle or a private power generator capable of traveling with electric power of a vehicle storage battery. Control of charging / discharging of the vehicle storage battery of the vehicle or control of the private power generation device is performed, and electric power obtained by discharging the vehicle storage battery is supplied to the building via the distribution board. Control to supply or control to improve the output of the private power generator.

  According to invention of Claim 7, the electric power of the storage battery for vehicles can be utilized in a building.

  As described above, the invention according to claim 1 controls the charging / discharging of the storage battery depending on whether or not the power consumption of the system power of the building is equal to or less than the allowable power consumption. When it increases, it has the effect that electric power can be supplemented by discharge of a storage battery.

  According to the second aspect of the present invention, the charging / discharging of the storage battery is controlled according to the amount of power used, and when the power consumption of the system power increases, the effect of being able to compensate for the power by discharging the storage battery is achieved. Have.

  According to the third aspect of the present invention, when the amount of system power used exceeds an allowable level, energy saving can be promoted by displaying an instruction to stop the power load means having a low priority. Has an effect.

  According to the fourth aspect of the present invention, when the amount of power used by the system power exceeds an allowable level, it is possible to achieve energy saving by stopping power supply to the branch circuit having a low priority. Have

  According to the invention described in claim 5, since the storage battery can be charged when the system power is cheap, the total cost of the power used in the building can be suppressed.

  According to the sixth aspect of the present invention, since the storage battery can be discharged when the system power charge is expensive, the total cost of the power used in the building can be suppressed.

  According to invention of Claim 7, it has the effect that the shortage of the electric power used by a building can be compensated by utilizing the electric power of the vehicle connected to the building.

It is the schematic which shows an example of the electric power supply network where the electric power feeding control apparatus which concerns on embodiment of this invention is used. It is the schematic which shows an example of the electrical connection centering on the distribution board which concerns on embodiment of this invention. It is a block diagram which shows schematic structure of the home energy manager which concerns on embodiment of this invention. It is a flowchart of the electric power feeding control process which concerns on the 1st Embodiment of this invention. It is a flowchart of the modification 1 of the electric power feeding control process which concerns on the 1st Embodiment of this invention. It is a modification 2 flowchart of the electric power feeding control process which concerns on the 1st Embodiment of this invention. It is a flowchart of the electric power feeding control process which concerns on the 2nd Embodiment of this invention. It is a flowchart of the modification 1 of the electric power feeding control process which concerns on the 2nd Embodiment of this invention. It is a flowchart of the modification 2 of the electric power feeding control process which concerns on the 2nd Embodiment of this invention.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram illustrating an example of a power supply network 100 in which a power supply control device according to an embodiment of the present invention is used. In the power supply network according to the present embodiment, in addition to the grid power 12A, power companies such as a wind power generation company 12B that supplies power generated by wind power generation and a solar power generation company 12C that supplies power generated by sunlight. Supplies power to the area to which the buildings 10A, 10B and 10C belong.

  In FIG. 1, the area transformer 62 converts the power supplied from the grid power 12 </ b> A, the wind power generation company 12 </ b> B, and the solar power generation company 12 </ b> C into a voltage and current suitable for power transmission through the transmission line 64.

  As the voltage and current in the power transmission line 64, a three-phase three-wire system 200V, a single-phase two-wire system 200V, a single-phase two-wire system 100V, or the like can be considered.

  In FIG. 1, the power transmission line 64 is an annular system having a section switch 66, but may be a dendritic system, a low-pressure banking system, or a regular network system.

  In the buildings 10A, 10B, and 10C in the monitoring area, the distribution board 14 is connected to the power transmission line 64, respectively.

  The power supply network 100 shown in FIG. 1 includes a network 72 that connects the buildings 10A, 10B, and 10C in the area, and the network 72 and the power transmission line 64 include information related to the power supply in the area to each building. An information center 82 is provided to notify the user.

  The information center 82 can communicate with each of the grid power 12A, the wind power generation company 12B, and the solar power generation company 12C via the network 72 or a dedicated line, etc., from the grid power 12A, the wind power generation company 12B, and the solar power generation company 12C. Information such as the electricity bill and power supply / demand situation is acquired, and the acquired information is transmitted to the buildings 10A to 10C.

  The buildings 10A, 10B, and 10C in the region are configured such that vehicles 18A, 18B, and 18C such as EV (Electric Vehicle), HV (Hybrid Vehicle), and PHV (Plug-in Hybrid Vehicle) can be connected to each other. Hereinafter, the configurations of the buildings 10A, 10B, and 10C and the vehicles 18A, 18B, and 18C will be described. However, the configurations of the buildings 10A, 10B, and 10C and the configurations of the vehicles 18A, 18B, and 18C are all the same. Therefore, the same reference numerals are used for explanation.

  First, as described above, the power distribution from the grid power 12A, the wind power company 12B, and the solar power company 12C is supplied to the buildings 10A, 10B, and 10C via the region transformer 62 and the power transmission line 64. A panel 14 is provided, and power from the grid power 12A, the wind power generation company 12B, and the solar power generation company 12C is supplied to the buildings 10A, 10B, and 10C via the distribution board 14.

  Furthermore, the buildings 10A, 10B, and 10C may include a private power generation device such as a fuel cell 90 as an external power source other than the grid power 12A, the wind power generation company 12B, and the solar power generation company 12C.

  The buildings 10A, 10B, and 10C include a storage battery 92 that stores a surplus of power from the grid power 12A, the wind power generation company 12B, the solar power generation company 12C, or the fuel cell 90.

  Further, it is possible to charge the vehicle storage battery 28 of the vehicles 18A, 18B, and 18C connected to the distribution board 14 via the vehicle connecting portion 26, and conversely, from the vehicle storage battery 28 to the distribution board 14. It is also possible to supply power to.

  The electric power taken out from the vehicle storage battery is a direct current, but is converted into 50 Hz or 60 Hz alternating current by a single-phase two-wire system 100V by an inverter (not shown) included in each vehicle, and via a vehicle connecting portion 26 described later. To the distribution board 14.

  The vehicle connecting portion 26 is a connector that electrically connects the distribution board 14 and the vehicle by being connected to the vehicle by a cable. The connector includes a terminal of a power line for supplying electric power from the distribution board 14 to the vehicle or supplying electric power of the vehicle to the distribution board 14, and a home energy manager 30 for managing and controlling energy in the building. You may have the terminal of the information line which concerns on communication with a vehicle.

  The vehicle connection unit 26 supplies power to the vehicle under the control of the home energy manager 30 and charges the vehicle storage battery 28. In addition, the vehicle connection unit 26 supplies power to the distribution board 14 according to the control of the home energy manager 30 because the vehicle storage battery is discharged.

  Further, the home energy manager 30 monitors the current between the vehicle connecting portion 26 and the vehicle connected to the vehicle connecting portion 26, and whether the vehicle storage battery 28 is charged via the vehicle connecting portion 26, Alternatively, it is assumed that it is possible to grasp whether or not the electric power of the vehicle is supplied to the distribution board 14 by the discharge of the vehicle storage battery 28.

  FIG. 2 is a schematic diagram illustrating an example of electrical connection centering on the distribution board 14 according to the present embodiment. In FIG. 2, the power of the grid power 12 </ b> A, the wind power generation company 12 </ b> B, and the solar power generation company 12 </ b> C is supplied to the distribution board 14 via the main breaker 100. In FIG. 2, it is assumed that a solid line is a power line to which power is supplied, and a broken line is an information line through which measurement data or control information flows.

  The distribution board 14 includes a plurality of branch breakers 141 to 144. The branch breaker 141 is in the branch circuit 151, the branch breaker 142 is in the branch circuit 152, the branch breaker 143 is in the branch circuit 153, and the branch breaker 144 is in the branch circuit. Each corresponds to 154.

  A power load or the like is connected to each of the branch circuits 151 to 153. For example, the home circuit device 20 is connected to the branch circuit 151, the residential equipment 22 is connected to the branch circuit 152, and EV, HV, or Vehicle connecting portions 26 to which the PHV is electrically connected are connected to each other.

  A storage battery 92 is connected to the branch circuit 154. In the present embodiment, a fuel cell 90 may be provided, and the power generated by the fuel cell 90 is supplied to the distribution board 14 via the power supply circuit 172.

  The branch circuits 151 to 153 are provided with current sensors 161 to 163 for measuring the current values of the branch circuits 151 to 153, respectively. Information lines from the current sensors 161 to 163 are connected to the home energy manager 30 together with information lines for the home energy manager 30 to control the distribution board 14.

  Further, on the branch circuit 154 side of the storage battery 92, the current value of the branch circuit 154 can be measured, the voltage value of the storage battery 92 can be measured, and further, the control signal from the home energy manager 30 can be received. A storage battery control interface 171 is provided.

  The storage battery 92 is a secondary battery that can be charged and discharged, such as a lead storage battery, a nickel metal hydride battery, or a lithium ion battery. Since one cell of these secondary batteries has an electromotive force of about 1 to 2 V, in this embodiment, a plurality of cells are connected in series so that a desired voltage can be obtained and a desired voltage can be obtained. A desired current can be obtained by bundling a plurality of aggregates composed of a plurality of cells connected in series to each other and packaging them.

  In addition, the packaged storage battery 92 converts alternating current (for example, 100 V, 50 Hz) supplied through the distribution board 14 into direct current having a voltage suitable for charging the storage battery, and the direct current discharged from the storage battery. Conversion means (not shown) such as a bi-directional inverter capable of converting the power into the alternating current supplied from the distribution board 14 to the home appliance 20 and the housing equipment 22 is provided.

  Furthermore, the storage battery 92 includes a charge / discharge control circuit (not shown) that controls charging / discharging of the storage battery 92, and is controlled by the home energy manager 30 via the storage battery control interface 171 together with the above-described inverter.

  A fuel cell control interface 173 that can measure the current value and voltage value of the power supply circuit 172 and can receive a control signal from the home energy manager 30 is provided on the power supply circuit 172 side of the fuel cell 90. .

  The home energy manager 30 monitors the amount of electricity stored in the storage battery 92 based on the voltage value of the storage battery 92 measured by the storage battery control interface 171 provided in the storage battery 92, and the power consumption of the building is at a certain level. When it exceeds, the storage battery 92 is discharged and the electric power obtained by the discharge is used in the building.

  Further, the home energy manager 30 controls the charging of the storage battery 92 based on information such as the electricity bill of the grid power acquired from the information center 82.

  For example, when the electricity charge is less than or equal to a predetermined amount from the information center 82, the storage battery 92 is controlled to be charged to the upper limit.

  In the present embodiment, home energy manager 30 may be, for example, a HEMS (Home Energy Management System) that controls electric power in a building.

  FIG. 3 is a block diagram showing a schematic configuration of the HEMS used as the home energy manager 30 according to the present embodiment.

  The HEMS (Home Energy Manager 30) includes a computer, and as shown in FIG. 2, includes a CPU 36, a ROM 38, a RAM 40, and an input / output port 42, which are an address bus, a data bus, and a control. They are connected to each other via a bus 44 such as a bus.

  A display unit 46, an operation unit 48, and a memory 50 are connected to the input / output port 42 as various input / output devices. The display unit 46 and the operation unit 48 are integrally configured, and a touch panel provided on the display unit 46 can be applied to the operation unit 48.

  The memory 50 controls a program for controlling the power supplied to the buildings 10A, 10B and 10C described above, a program for controlling the home appliance 20 and the housing equipment 22, and the charge / discharge of the vehicle storage battery 28. A program for controlling the fuel cell 90, a program for controlling charge / discharge of the storage battery 92, and various information for executing these programs.

  Further, the memory 50 stores information on the electricity rate of the grid power 12A acquired from the information center 82, the allowable power consumption that is the power usage of the grid power 12A allowed in each building, and the power storage amount of the storage battery 92. be able to.

  The HEMS performs various types of control such as control of power supplied to the buildings 10A, 10B, and 10C by developing a program stored in the memory 50 on the RAM 40 and the like and executing it by the CPU 36.

  Furthermore, the input / output port 42 is connected to the distribution board 14, the fuel cell 90, the storage battery 92, the vehicle connection unit 26, the network interface 52 connected to the network, and the like.

  Subsequently, the control of the home energy manager 30 according to the present embodiment will be described separately from the first embodiment, the second embodiment, and the third embodiment.

[First Embodiment]
FIG. 4 is a flowchart of power supply control processing according to the first embodiment. In the first embodiment, prior to the execution of the processing of FIG. 4, the information center 82 provides information on the allowable power consumption, which is the upper limit of the power consumption of the grid power allowed in the building. It is assumed that the ratio of the power generation amount of the grid power 12A to the power company and the information on the electricity bill of the grid power 12A are acquired in advance from the information center 82 and stored in the memory 50 of the home energy manager 30.

  The allowable power consumption is determined in the information center 82 according to each building. Various methods can be used to determine how to determine this. For example, based on the past power consumption data, the ratio of the power consumption of each building to the power consumption of the entire area where each building exists (Eg, percentage) is calculated. Then, based on the calculated ratio, the upper limit power amount of the system power supplied to the entire area where each building exists is apportioned to each building, and the allowable power consumption amount of each building is calculated. The past power consumption may be, for example, the power consumption of the same month of the previous year or the same week of the previous year, or the daily average during these periods, the power consumption of the last week or the last month, or the daily average of these periods. Good.

  In step 400 of FIG. 4, the power consumption amounts of the branch circuits 151 to 154 are calculated based on the current values measured by the current sensors 161 to 163 and the storage battery control interface 171 provided on the distribution board 14, and the sums are calculated. To calculate the power consumption of the building. Alternatively, a separate current sensor may be provided between the distribution board 14 and the main breaker 100, and the power consumption of the building may be calculated from the current value measured by the current sensor.

  In step 402, the power consumption amount of the system power in the building is calculated by multiplying the power consumption amount of the building calculated in step 400 by the ratio of the power generation amount of the system power 12A with respect to all the power providers stored in the memory 50. Is calculated.

  In step 404, it is determined whether or not the power consumption of the system power in the building is less than or equal to the allowable power consumption. If the determination is affirmative, it is determined in step 406 whether or not the storage amount of the storage battery 92 is greater than or equal to the upper limit value. Is done. Although the upper limit value of the storage amount of the storage battery 92 can be defined in various ways, in the present embodiment, as an example, it is assumed that it is about 80 to 90% with respect to the maximum limit of the storage amount.

  The numerical value of 80 to 90% with respect to the maximum limit of the amount of stored electricity varies depending on the type of storage battery. For example, in the case of a lithium ion battery that tends to adversely affect the battery life in the fully charged state, it is desirable to keep the upper limit value of the charged amount to about 80% of the maximum charged amount that is full charge.

  If the determination in step 406 is affirmative, the process returns.

  If a negative determination is made in step 406, it is determined whether or not the electricity charge of the grid power 12A is equal to or lower than a predetermined value, that is, it is inexpensive. If the determination is affirmative, the storage battery 92 is charged to the upper limit value in step 410, Is returned to step 406.

  If the determination at step 408 is negative, the process returns.

  If the determination in step 404 is negative, it is determined in step 412 whether or not the storage amount of the storage battery 92 is equal to or less than the lower limit value. The lower limit value of the storage amount of the storage battery 92 can be defined in various ways. In the present embodiment, as an example, the storage amount of the storage battery 92 is about 10 to 20%. The lower limit value of the amount of stored electricity varies depending on the type of storage battery. For example, in a lithium ion battery that tends to adversely affect the life of the storage battery if it is completely discharged, a lower value of about 20% is considered as the lower limit value. It is done.

  If the determination in step 412 is affirmative, the storage battery 92 is discharged in step 414, and the electric power obtained by the discharge is supplied to the distribution board 14.

  Next, in step 416, it is determined whether or not the difference between the power consumption of the system power and the power obtained by discharging the storage battery 92 is equal to or less than the allowable power consumption.

  If the determination in step 416 is affirmative, the process returns.

  If the determination in step 416 is negative, in step 418, a message indicating that the device (power load) having a low priority is stopped is displayed on the display unit 46, and the process returns. In the first embodiment, it is assumed that the priority order of each power load is stored in the memory 50 of the home energy manager 30 in advance.

  As described above, according to the first embodiment, when the power usage amount of the system power exceeds an allowable level, the power of the storage battery 92 is converted into the building after taking into account the power storage amount of the storage battery 92. Can be used in

  The first embodiment can also be used as the first modification as shown in FIG. 5 is different from FIG. 4 only in step 518, the other steps are denoted by the same reference numerals as those in FIG. 4, and description thereof will be omitted.

  In step 518 of FIG. 5, the connection of the branch breakers 141 to 143 is turned off in the order of lower priority.

  In the first modification of the first embodiment in FIG. 5, if the power consumption of the grid power 12 </ b> A exceeding the allowable power consumption cannot be offset even using the power of the storage battery 92, a branch breaker is used. Turn off to reduce power consumption in buildings.

  In the first modification of the first embodiment, it is assumed that the priority order of branch breakers is stored in the memory 50 of the home energy manager 30. The home energy manager 30 can arbitrarily turn on or off any of the branch breakers 141 to 143 by controlling the distribution board 14.

  Furthermore, the first embodiment can be used as the second modification as shown in FIG. 6 is different from FIG. 5 only in step 614, and other procedures are denoted by the same reference numerals as those in FIG.

  In step 614 of FIG. 6, not only the discharge of the storage battery 92 but also the discharge of the vehicle storage battery 28, and if the fuel cell 90 can be used, the output of the fuel cell 90 is increased to increase the power related to the system power. Offset power consumption.

  As described above, by using means other than the storage battery 92 in combination, even if the usage amount of the system power is excessive, it can be canceled out, and energy saving in the region where the system power 12A is supplied can be achieved.

[Second Embodiment]
Next, a second embodiment will be described. FIG. 7 is a flowchart of power supply control processing according to the second embodiment of the present invention.

  FIG. 7 is different from FIG. 4 according to the first embodiment in the processing after step 406 and the processing in step 712. However, since the other processes are the same as those in the first embodiment of FIG. 4, the same steps as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  In the first embodiment, the storage battery is not fully charged and is charged up to an upper limit value corresponding to 80 to 90% of the full charge. In the second embodiment, an affirmative determination is made in step 408. If so, in step 710, the storage battery is fully charged.

  The nickel-cadmium battery and the nickel-hydrogen battery are likely to have a so-called memory effect in which, when repeated charging is repeated when the storage amount is slightly reduced, the discharge voltage is remarkably lowered even though the battery is not sufficiently discharged. Therefore, in a storage battery such as a nickel-cadmium battery and a nickel-hydrogen battery, it is reasonable to charge the battery to the maximum capacity.

  Therefore, in 2nd Embodiment, while fully accumulating the storage battery 92, when the electrical storage amount of the storage battery 92 is not the minimum, the electric power stored in the storage battery 92 is discharged.

  In the first embodiment, the process is returned in the case of an affirmative determination in step 406, but in the second embodiment, in the case of an affirmative determination in step 406, the electricity charge of the system power 12A is predetermined in step 720. In the case of an affirmative determination, in step 722, the storage battery 92 is completely discharged until the storage amount of the storage battery 92 is minimized, that is, in the case of an affirmative determination. .

  This is because it is more reasonable for nickel / cadmium batteries and nickel / hydrogen batteries to be fully charged after fully discharged in order to prevent the memory effect described above.

  In the second embodiment, when the electricity rate is high, the process is returned after the storage battery 92 is completely discharged in step 722 and the discharged electric power is supplied to the building.

  In step 712, it is determined whether or not the amount of electricity stored in the storage battery 92 is at a minimum level. If not, the storage battery 92 is discharged in step 414.

  Thus, when the storage battery 92 is a nickel-cadmium battery or nickel-hydrogen battery suitable for complete discharge and full charge, it is desirable to charge and discharge as in steps 710 and 722 of FIG. Furthermore, it is desirable to discharge the electric power stored in the storage battery 92 if the storage amount of the storage battery 92 is not the minimum as in the determination in step 712.

  The second embodiment can also be used as a first modification as shown in FIG. FIG. 8 differs from FIG. 7 only in step 818, and therefore, the other steps are denoted by the same reference numerals as those in FIG.

  In step 818 of FIG. 8, the connection of the branch breakers 141 to 143 is turned off in the order of lower priority.

  In the first modification of the second embodiment in FIG. 8, even when the power of the storage battery 92 is used, if the power consumption of the system power 12 </ b> A exceeding the allowable power consumption cannot be offset, the first As in the first modification of the embodiment, the branch breaker is turned off to reduce the power consumption in the building.

  In the first modification of the second embodiment, it is assumed that the priority order of branch breakers is stored in the memory 50 of the home energy manager 30 as in the first modification of the first embodiment. The home energy manager 30 can arbitrarily turn on or off any of the branch breakers 141 to 143 by controlling the distribution board 14.

  Furthermore, the second embodiment can be used as a second modification as shown in FIG. FIG. 9 differs from FIG. 8 in steps 914 and 922, but the other procedures are the same as FIG. Therefore, the same steps as those in FIG. 8 are denoted by the same reference numerals as those in FIG.

  In step 914 of FIG. 9, not only the discharge of the storage battery 92 but also the discharge of the vehicle storage battery 28, and if the fuel cell 90 is usable, the output of the fuel cell 90 is increased to increase the power related to the system power. Offset power consumption.

  Furthermore, also in step 922, if the electricity charge of the grid power 12A is high, it is required in the building by increasing the output of the fuel cell 90 and using the power of the vehicle storage battery 28 in addition to the power of the storage battery 92. Try to cover electricity.

  Thus, by using means other than the storage battery 92 in combination, even if the usage amount of the system power 12A is excessive, the usage amount can be offset, and energy saving in the region where the system power 12A is supplied is achieved. can do.

10A, 10B, 10C Building 12A System power 12B Wind power generation company 12C Solar power generation company 14 Distribution board 18A, 18B, 18C Vehicle 20 Home appliances 22 Housing equipment 26 Vehicle connection part 28 Vehicle storage battery 30 Home energy manager 46 Display part 50 Memory 52 Network interface 82 Information center 90 Fuel cell 92 Storage batteries 141, 142, 143, 144 Branch breakers 161, 162, 163 Current sensor 171 Storage battery control interface 173 Fuel cell control interface

Claims (7)

Power consumption of the grid power that is allowed in buildings where grid power and power generated by natural energy are supplied via distribution boards, and power consumption of the entire area where multiple buildings exist Acquisition means for acquiring the allowable power consumption calculated from the past power consumption of each building for the information center,
Power consumption calculation means for calculating the power consumption of the grid power of the building;
A power consumption determining means for determining whether the power consumption of the grid power of the building is equal to or less than the allowable power consumption;
A storage amount measuring means for measuring a storage amount of a storage battery that stores the grid power and the power generated by the natural energy;
Control means for controlling charging / discharging of the storage battery based on the magnitude relation between the allowable power consumption and the power consumption of the system power of the building, and the storage amount of the storage battery,
A power supply control device comprising:   The control means discharges the storage battery when the power usage amount of the system power of the building exceeds the allowable power consumption amount and the power storage amount of the storage battery is equal to or higher than a lower limit value, and the electric power obtained by the discharge The power supply control device according to claim 1, wherein the power is supplied to the building through the distribution board. Display means for displaying information;
Storage means for storing priorities of the plurality of power load means of the building,
The control means displays a display for recommending stoppage of the power load means defined in the lower order in the priority order when the power consumption of the grid power of the building exceeds the allowable power consumption The power supply control device according to claim 1 or 2, which is displayed on the screen. Further comprising storage means for storing in advance the priority order of a plurality of branch circuits for branching the supplied power from the distribution board;
The control means cuts off the power supply to the branch circuit defined in the lower order in the priority order when the power consumption of the grid power of the building exceeds the allowable power consumption. 2. The power supply control device according to 2. The acquisition means further acquires information on the charge of the grid power of the building from the information center,
The control means, when the amount of power used by the system power in the building is less than or equal to the allowable power consumption and the amount of power stored in the storage battery is less than an upper limit, It is determined whether or not the charge in the information is equal to or less than a predetermined value, and when the charge is equal to or less than the predetermined value, control is performed to charge the storage battery until the storage amount of the storage battery reaches an upper limit value. The power supply control device according to any one of the above.   The control means determines whether or not the charge in the grid power charge information of the acquired building is equal to or less than a predetermined value when the storage amount of the storage battery is equal to or greater than an upper limit value, and the charge is the predetermined value The power supply control device according to claim 5, wherein the storage battery is controlled to discharge until the amount of power stored in the storage battery becomes a minimum. The control means is configured to control charging / discharging of the vehicle storage battery of the vehicle or the private power generation device when a vehicle or a private power generation device capable of traveling with electric power of the vehicle storage battery is connected to the distribution board. The control according to any one of claims 1 to 6, wherein the control is further performed to control the power obtained by discharging the vehicle storage battery to the building via the distribution board or to improve the output of the private power generation device. The power supply control device according to claim 1.