JP2012065516A - Electrical power feeding method, electrical power feeding system, and mobile object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical power feeding method, an electrical power feeding system, and a mobile object which are capable of accommodating each other with electrical power conveyed via the mobile object among micro-grids.SOLUTION: A part or all of power-generation power generated by large volume photovoltaic power generation apparatuses 4 and 4 are stored in a first battery 11 which a first power storage device 1 has, and a third battery mounted on mobile objects 3, ..3 is charged by electrical power which is not used for being stored in the first battery 11 within the power-generation power and/or electrical power which has been stored in the first battery 11. In the case where the mobile objects 3, ..3 move to an area where a load exists, a part or all of discharge power which is discharged from the third battery are made to be stored in a second battery which a second power storage device arranged in said area has, and electrical power which is not used for being stored in the second battery within the discharge power and/or electrical power which has been stored in the second battery are applied to electrical power which should be consumed by the load.

Description

  The present invention relates to a power supply method, a power supply system, and a mobile unit that transmit power using a mobile unit equipped with a storage battery.

  In recent years, a so-called microgrid has been attracting attention, in which part or all of the power demand in the region is covered by the power supplied from the power supply source in the region without depending only on the power from the existing commercial power system. . The microgrid is a local production for local consumption and autonomous distributed small-scale power network, and includes a distributed power source such as solar power generation, wind power generation, biomass power generation, and cogeneration as a power supply source.

  For example, in Patent Document 1, a secondary battery (storage battery) having a large capacity and a large output is connected to a power supply line connecting a distributed power supply device and a load via a charging / discharging device, and the power supply state in the power supply line And a detection device that detects the state of the secondary battery, and a control device that controls the power supply device and the charging / discharging device based on each state detected by the detection device, and when surplus power is estimated in the power supply line A microgrid has been proposed in which a secondary battery is charged and the secondary battery is discharged when power shortage is estimated.

JP 2007-159225 A

  However, the microgrid disclosed in Patent Document 1 aims to economically use a distributed power supply apparatus by adjusting supply power and demand power in the microgrid using a secondary battery. It is not considered until the surplus power is sent outside the microgrid for effective use. On the other hand, for example, when surplus power from a microgrid is sent to the power system for sale, it is necessary to maintain the power quality that is the so-called reverse power flow above a certain level, and the power receiving contract is large. There is a disadvantage that the unit price of electricity sales is lower.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a power transmission method and a power transmission method that can interchange power carried through a mobile body between microgrids. It is in providing a feeding system and a moving body.

  According to another aspect of the present invention, there is provided a method of supplying power from a power storage device that generates power and stores the first storage battery to a load that consumes the power stored in the second storage battery. A mounted mobile body is prepared, the third storage battery is charged by the power generated by the power generation device and / or the power stored in the first storage battery, the mobile body is moved, and the charged third storage battery is The discharged power is stored in the second storage battery and / or supplied to the load.

  An electric power supply system according to the present invention is an electric power supply system that supplies electric power from a power generation device that generates electric power and stores the electric power in a first storage battery to a load that consumes the electric power stored in the second storage battery. A mobile unit equipped with three storage batteries, a first charger that charges the third storage battery with electric power generated by the power storage device and / or electric power stored in the first storage battery, and the first charger is charged The third storage battery includes a second charger that stores power in the second storage battery and / or supplies power to the load.

  The power supply system according to the present invention is characterized in that the moving body includes the first charger and the second charger.

  In the power supply system according to the present invention, the power storage device is connected to an electric power system, and a part or all of the generated electric power is supplied to the electric power system.

  The power supply system according to the present invention includes a power generation device that generates power using natural energy, and uses the power generation device to store power in the second storage battery and / or supply power to the load. It is characterized by that.

  In the power supply system according to the present invention, the second storage battery and the load are connected to an electric power system, and / or a part of the power to be stored in the second storage battery and / or the power to be consumed by the load All of them are exchanged with the electric power system.

  The power supply system according to the present invention includes first receiving means for receiving a selection as to whether or not to charge the third storage battery, and the second charger receives a selection for charging by the first receiving means. In this case, the third storage battery is charged with the power stored in the second storage battery and / or the power to be stored in the second storage battery.

  In the power supply system according to the present invention, when the first charger accepts the selection not to charge, the second charger discharges the third storage battery to store electricity in the second storage battery, and In another aspect, power is supplied to the load.

  The power supply system according to the present invention includes a second receiving unit that receives a setting of a charge amount or a discharge amount according to a selection result received by the first receiving unit, and the second charger includes the first charger. (2) The charging amount or discharging amount of the third storage battery is adjusted according to the setting of the charging amount or discharging amount received by the receiving means.

  The power supply system according to the present invention includes a third receiving unit that receives a charge / discharge stop during charging / discharging of the third storage battery, and the second charger receives the stop when the third receiving unit receives the The charging / discharging of the third storage battery is stopped.

  The mobile body according to the present invention is equipped with a storage battery that stores electric power, and in a mobile body that includes a charger that charges the storage battery with electric power from an external device, the mobile body is selected to charge or discharge the storage battery. Receiving means for receiving, and the charger is configured to be capable of discharging from the storage battery to an external device, and switching between charging and discharging according to a selection result received by the receiving means. It is characterized by being.

In the present invention, a part or all of the generated power generated by the power generation and storage device is stored in the first storage battery, and the power that is not used for storing in the first storage battery among the generated power, and / or The third storage battery mounted on the moving body is charged with the electric power stored in the first storage battery. Moreover, when a mobile body moves to the area where the load exists, a part or all of the discharged power discharged from the third storage battery is stored in the second storage battery. The power that is not used for power storage and / or the power stored in the second storage battery is directed to the power that should be consumed by the load.
As described above, the power generated by the power storage device is supplied to the load by the moving body that moves from the power generation power storage device side to the load side.

  In the present invention, the moving body includes the first charger that charges the third storage battery and the second charger that discharges the third storage battery and supplies power to the second storage battery and / or the load. Therefore, it is possible to reduce restrictions on the connection destination of the mobile object. It is also possible to share part or all of the second charger with part or all of the first charger. Moreover, when a mobile body is equipped with the charger / discharger as standard, it becomes possible to divert part or all of the charger / discharger.

In the present invention, surplus power that is not used for power storage of the first storage battery and the third storage battery among the generated power generated by the power storage apparatus is supplied to the power system connected to the power storage apparatus.
Thereby, surplus electric power of generated electric power can be sold.

  In the present invention, a power generation device that uses natural energy such as sunlight, wind power, and wave power is connected to the second storage battery and the load, and the power generated by the power generation device is discharged from the third storage battery. The electric power to be stored in the second storage battery and / or the electric power to be consumed by the load is added together with the discharged power.

  In the present invention, the second storage battery and the load are connected to the electric power system, and a part or all of the electric power to be used for electric storage in the second storage battery and / or consumption at the load is exchanged with the electric power system. Give and receive between. Thereby, according to the excess and deficiency of the electric power which should be consumed by the load side, the power sale and power purchase with respect to an electric power grid | system can be performed.

In the present invention, the selection of whether or not to charge the third storage battery is accepted. This selection may be received on the mobile body side and notified to the load side, or may be received on the load side, for example.
When the selection to charge is accepted, when the power supply source is not connected to the load side, the third storage battery is charged with the power stored in the second storage battery. When a power supply source is connected to the load side, as long as the power from the supply source can cover the power to charge the third storage battery, one of the power to be stored in the second storage battery from the supply source As long as the part or the whole becomes the power to charge the third storage battery and cannot be covered, the insufficient power is compensated by the discharge of the second storage battery.
Thereby, when a mobile body is driven with the electric power stored in the 3rd storage battery with which charge was selected, the movement range of a mobile body can be expanded.

  In this invention, when the selection which does not charge a 3rd storage battery is received, a 3rd storage battery is discharged except when the selection which neither charge nor discharge is received. The electric power discharged from the third storage battery becomes electric power to be consumed by the load and / or electric power to be stored in the second storage battery.

In the present invention, when the selection to charge the third storage battery is accepted, the setting of the charge amount is accepted, and when the selection not to charge the third storage battery is accepted, the setting of the discharge amount is accepted. These settings may be received on the mobile body side and notified to the load side, for example, or may be received on the load side.
When the setting of the charge amount is accepted, the charge amount of the third storage battery is adjusted according to the accepted set amount. When the setting of the discharge amount is accepted, the discharge amount of the third storage battery according to the accepted set amount. Adjust.
Thereby, the electric energy which should be electrically stored in a 3rd storage battery, and the electric energy which can be discharged from a 3rd storage battery can be set.

In the present invention, stop of charging / discharging is accepted while charging and discharging the third storage battery. These stops may be received on the mobile body side and notified to the load side, for example, or may be received on the load side.
Moreover, when the stop of charging / discharging is received, charge and discharge of a 3rd storage battery are stopped. Thereby, for example, charging / discharging can be temporarily stopped and switched from charging to discharging (or from discharging to charging).

In the present invention, the mobile body accepts selection of whether to charge or discharge the storage battery mounted on the mobile body, charging from the external device to the storage battery according to the received selection result, and from the storage battery to the external device Switch between discharging and discharging.
Thereby, switching of charging / discharging of the storage battery with respect to an external device can be performed only by a moving body.

According to the present invention, a part or all of the generated power generated by the power storage device is stored in the first storage battery, and the power that is not used for storing in the first storage battery among the generated power and / or the first The 3rd storage battery mounted in the moving body is charged with the electric power stored in the 1 storage battery. Moreover, when a mobile body moves to the area where the load exists, a part or all of the discharged power discharged from the third storage battery is stored in the second storage battery. The power that is not used for power storage and / or the power stored in the second storage battery is directed to the power that should be consumed by the load.
As described above, the power generated by the power storage device is supplied to the load by the moving body that moves from the power generation power storage device side to the load side. Therefore, it is possible to interchange the electric power carried through the moving body between the microgrids.

It is a block diagram which shows a part of example of a structure of the electric power supply system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the other part of the structural example of the power supply system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the principal part structure of a moving body and a 1st control apparatus. It is a flowchart which shows the process sequence of CPU of the 1st control apparatus which controls supply of the electric power to an electric power grid | system based on the voltage of a 1st power supply line. It is a flowchart which shows the process sequence of CPU of the mobile body control part which controls charge to a 3rd storage battery. It is a flowchart which shows the process sequence of CPU of the 2nd control apparatus which controls transmission / reception of the electric power with respect to an electric power grid | system based on the voltage of a 2nd power supply line. It is a flowchart which shows the process sequence of CPU of the mobile body control part which controls charging / discharging with respect to a 3rd storage battery. It is a part of flowchart which shows the process sequence of CPU of the mobile body control part which controls the charge / discharge amount with respect to a 3rd storage battery. It is a block diagram which shows a part of structural example of the power supply system which concerns on Embodiment 3 of this invention. It is a block diagram which shows a part of structural example of the electric power feeding system which concerns on Embodiment 4 of this invention. It is a flowchart which shows the process sequence of CPU of the 1st control apparatus which controls switching of a 1A storage battery and a 1B storage battery based on the voltage of a 1A power supply line and a 1B power supply line.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a part of a configuration example of the power supply system according to Embodiment 1 of the present invention, and FIG. 2 is a configuration example of the power supply system according to Embodiment 1 of the present invention. It is a block diagram which shows another one part. In the power transmission system, a part shown in FIG. 1 and the other part shown in FIG. 2 can be regarded as different microgrids located in physically separated areas. The moving bodies 3, 3,... 3 composed of vehicles each equipped with a third storage battery 31 to be described later move in both directions between these regions. Vehicles such as ships and trains may be used as the moving body. In addition, the arrow in a figure shows the direction where electric power goes.

  In the figure, reference numeral 1 denotes a first power storage device that stores electric power. The first power storage device 1 includes a first storage battery 11 made of, for example, a lithium ion battery or a nickel metal hydride battery, and the first storage battery 11 and the first power supply line 10. And DC / DC converter 12 that autonomously controls the exchange of direct-current power between them. The first power supply line 10 includes an in-factory power facility 100 including photovoltaic power generation devices 4 and 4 that supply electric power to a load 44 in the factory that operates with AC power via a DC / AC inverter 45, and a mobile unit. 3, 3, 3, an electric double layer capacitor 13 that equalizes the voltage of the first power supply line 10, and a DC / AC inverter 14 that supplies power from the first power supply line 10 to the power system 5 are connected to each other. Has been.

Each of the moving bodies 3, 3,... 3 is connected via connectors 38, 38,. A grid I / F 15 including a power meter and a grid protection relay is interposed between the power grid 5 and the DC / AC inverter 14. A first control device 19 having a CPU 191 is connected to the DC / DC converter 12 and the DC / AC inverter 14.
The solar power generation devices 4 and 4 and the first power storage device 1 constitute a power generation power storage device. Moreover, it may replace with the solar power generation device 4, and may use the power generator using natural energy, such as a wind power generator and a wave power generator.

  2 in FIG. 2 is a second power storage device that stores electric power. The second power storage device 2 includes a second storage battery 21 made of, for example, a lithium ion battery or a nickel metal hydride battery, and the second storage battery 21 and the second power source. It comprises a DC / DC converter 22 that autonomously controls the exchange of DC power between the lines 20. In the second power supply line 20, home power facilities 200 and 200 each having a load 7 and a solar power generation device 6 that are operated by AC power, and movement that has flowed in from a part of the power supply system shown in FIG. 3, 3, 3, an electric double layer capacitor 23 that equalizes the voltage of the second power supply line 20, and a DC / AC inverter 24 that supplies power from the second power supply line 20 to the power system 5. It is connected.

Here again, the moving bodies 3, 3,... 3 are connected via connectors 38, 38,. The DC / AC inverter 24 also serves as an AC / DC converter that converts AC power received from the power system 5 into DC power and supplies it to the second power supply line 20. A system I / F 25 including a power meter and a system protection relay is interposed between the power system 5 and the DC / AC inverter 24. The DC / AC inverter 24 is connected to a second control device 29 having a CPU 291.
In addition, the solar power generation device 6 may be a power generation device using other natural energy described above, and these power generation devices may or may not be provided only in the apartment house.

  Each solar power generation device 4 shown in FIG. 1 includes a large-capacity solar cell panel 41 installed in a large-scale facility such as a factory, and the DC power generated by the solar cell panel 41 is converted by a DC / DC converter 42. The converted electric power is converted into an appropriate voltage and current, and the converted electric power is supplied to the first storage battery 11 of the first power storage device 1 and / or the third storage battery 31 of each of the moving bodies 3, 3,. , 31,... 31 (see FIG. 3). In this case, the control unit 43 performs maximum power follow-up control of the solar cell panel 41 and controls the amount of power to be supplied through the first power supply line 10 based on the amount of current. A part of the electric power generated by each solar power generation device 4 is consumed by the load 44 in the factory. Hereinafter, the electric power consumed by the load 44 from the electric power generated by each solar power generation device 4 will be described. Description will be made assuming that the subtracted power is generated power described later.

  The first storage battery 11 of the first power storage device 1 stores part or all of the generated power generated by the solar power generation devices 4 and 4. The third storage batteries 31, 31,... 31 of the mobile bodies 3, 3,... 3 are charged by the power stored in the first storage battery 11 and / or the generated power not used for storage in the first storage battery 11. The That is, when the third storage batteries 31, 31,... 31 can be charged by the generated power, the third storage batteries 31, 31,... 31 are charged by the generated power and stored in the first storage battery 11, and the generated power is used. When the third storage batteries 31, 31,... Cannot be charged, the first storage battery 11 that has previously stored the power that is insufficient for charging the third storage batteries 31, 31,. Make up for the discharge.

The DC / DC converter 12 autonomously controls charging / discharging of the first storage battery 11 so as to maintain a balance between power demand and supply in the first power supply line 10. That is, when the power supplied through the first power supply line 10 is larger than the consumed power, the first storage battery 11 is charged with the supplied power, so that excess power is appropriately stored. In addition, when the power supplied through the first power supply line 10 is smaller than the consumed power, the insufficient power is appropriately compensated by discharging the first storage battery 11 through the first power supply line 10. As a result, the voltage fluctuation of the first power supply line 10 is controlled to be within a predetermined range (for example, ± 10% of the reference voltage).
The electric double layer capacitor 13 is a large-capacitance capacitor, and acts to alleviate voltage fluctuations in the first power supply line 10 within a short time of a second or less.

The first control device 19 detects the terminal voltage of the first storage battery 11 in time series, and the terminal voltage is a discharge end voltage (in the case where the first storage battery 11 is a lithium ion battery, for example, 2.5 V / unit cell). In order to protect the first storage battery 11, the operation of the DC / DC converter 12 in the direction toward the first power supply line 10 is turned off. In this case, when the 1st control apparatus 19 and the mobile body 3 are connected so that communication is possible, you may make it transmit the notification which urges | stops charging to the mobile body 3 from the 1st control apparatus 19. FIG.
The first control device 19 also detects the voltage of the first power supply line 10 in time series, and when the voltage change rate tends to increase, the terminal voltage of the first storage battery 11 is substantially fully charged. (When the first storage battery 11 is a lithium ion battery, for example, 4.2 V / unit cell), the DC / AC inverter 14 is operated to sell power to the power system 5. Thereby, even if the power supplied through the first power supply line 10 becomes excessive, surplus power that is not used to store the third storage batteries 31, 31,... 31 is sent to the power system 5. .

Next, moving to FIG. 2, the load 7 included in each household power facility 200 is supplied with AC power from a DC / AC inverter 71 connected to the second power supply line 20. Moreover, the solar power generation device 6 has a small-capacity solar cell panel 61, and direct-current power generated by the solar cell panel 61 is converted into an appropriate voltage and current by the DC / DC converter 62 and converted. Electric power is supplied to the outside through the second power supply line 20. In this case, the control unit 63 performs maximum power follow-up control of the solar cell panel 61 and controls the amount of power to be supplied through the second power supply line 20 based on the amount of current.
When the load 7 operates with DC power, the DC / AC inverter 71 may be replaced with a DC / DC converter.

  The second storage battery 21 of the second power storage device 2 is generated by the solar power generation devices 6 and 6 using the discharge power discharged from the third storage batteries 31, 31,. A part or all of the combined electric power is stored. The power stored in the second storage battery 21 and / or the combined power that is not used for storing power in the second storage battery 21 is directed to power consumption in the loads 7 and 7. That is, when the combined power can cover the power consumption at the loads 7 and 7, the combined power is stored in the second storage battery 21 with the remaining power consumed at the loads 7 and 7. 7 is compensated for by the discharge of the second storage battery 21.

The DC / DC converter 22 autonomously controls charging / discharging of the second storage battery 21 so as to maintain a balance between power demand and supply in the second power supply line 20. That is, when the power supplied through the second power supply line 20 is larger than the consumed power, the second storage battery 21 is charged with the supplied power, so that excess power is appropriately stored. In addition, when the power supplied through the second power supply line 20 is smaller than the consumed power, the insufficient power is appropriately compensated by discharging the second storage battery 21 through the second power supply line 20. Thereby, the voltage fluctuation of the second power supply line 20 is controlled so as to be within a predetermined range (for example, ± 10% of the reference voltage).
The electric double layer capacitor 23 is a large-capacitance capacitor, and acts to alleviate voltage fluctuations in the second power supply line 20 within a short time of a second or less.

  The second control device 29 detects the terminal voltage of the second storage battery 21 in time series, and the terminal voltage is the end-of-discharge voltage (when the first storage battery 11 is a lithium ion battery, for example, 2.5 V / unit cell). In order to purchase power from the power system 5, the DC / AC inverter 24 is operated as an AC / DC converter. Thereby, even if the power supplied through the first power supply line 10 is insufficient, the power can be received from the power system 5.

The second control device 29 also detects the voltage of the second power supply line 20 in time series, and when the voltage change rate tends to increase, the terminal voltage of the second storage battery 21 is substantially fully charged. (When the first storage battery 11 is a lithium ion battery, for example, 4.2 V / unit cell), the DC / AC inverter 24 is operated to sell power to the power system 5. Thereby, even if the power supplied through the second power supply line 20 becomes excessive, surplus power is sent to the power system 5.
In this way, the third storage batteries 31, 31,... 31 and the solar power generation device have a power larger than the sum of the power to be stored in the second storage battery 21 and the power to be consumed by the loads 7 and 7. When the power is sent from 6, 6 to the load 7, 7 side, surplus power exceeding the combined power is sent to the power system 5, and when there is no surplus power, power is received from the power system 5.

Next, the structure of the moving body 3 and the 1st control apparatus 19 is demonstrated.
FIG. 3 is a block diagram showing the main configuration of the moving body 3 and the first control device 19. Note that the configuration of the second control device 29 having the CPU 291 is the same as the configuration of the first control device 19, and thus the description thereof is omitted. FIG. 3 illustrates a case where the moving body 3 is connected to the first power supply line 10 via the connector 38. The moving body 3 is equipped with a third storage battery 31 that charges and discharges electric power via a DC / DC converter 32, and includes a moving body control unit 39 that controls charging and discharging of the third storage battery 31.
Note that the DC / DC converter 32 and the moving body controller 39 constitute a first charger and a second charger.

  The mobile control unit 39 includes a CPU 391. The CPU 391 controls the ROM 392 that stores information such as programs, the RAM 393 that stores temporarily generated information, and the LCDI for controlling the operation display unit 33 including an LCD and a touch panel. / F394 and bus connected. The CPU 391 executes processes such as input / output and calculation according to a control program stored in advance in the ROM 392. The CPU 391 also includes A / D converters 396 and 397 for converting the voltage of the first power supply line 10 and the terminal voltage of the third storage battery 31 into digital values and detecting them, and the operation of the DC / DC converter 32. A bus is connected to an I / O port 395 for controlling the direction and on / off of the operation.

Needless to say, when the moving body 3 is connected to the second power supply line 20, the A / D converter 396 converts the voltage of the second power supply line 20 into a digital value.
In the first embodiment, when the moving body 3 is connected to the second power supply line 20, it is possible to select whether the third storage battery 31 is charged or discharged, or neither is performed. The selection is accepted by the operation display unit 33. You may make it receive selection of whether the 3rd storage battery 31 is charged or discharged.

  Next, the CPU 191 of the first control device 19 is bus-connected to a ROM 192 that stores information such as programs and a RAM 193 that stores temporarily generated information, and according to a control program stored in the ROM 192 in advance. , Processes such as input / output and calculation are executed. The CPU 191 also operates A / D converters 196 and 197 for converting the voltage of the first power supply line 10 and the terminal voltage of the first storage battery 11 into digital values and detecting them, and the operation of the DC / AC inverter 14. An I / O port 194 for turning on / off is connected to the I / O port 195 for turning off the operation of the DC / DC converter 12 in the direction in which the power is directed to the first power supply line 10.

Below, operation | movement of the power transmission system mentioned above is demonstrated in order of FIG. 1 side and FIG. 2 side using the flowchart which shows it.
FIG. 4 is a flowchart showing a processing procedure of the CPU 191 of the first control device 19 that controls the supply of power to the power system 5 based on the voltage of the first power supply line 10. The process of FIG. 4 is activated every 5 seconds, for example, but the activation period is not limited to 5 seconds. Note that the CPU 191 uses the I / O ports 194 and 195 to control the operations of the DC / AC inverter 14 and the DC / DC converter 12 (for example, an on / off state) and stores the result in the RAM 193.

  When the process of FIG. 4 is activated, the CPU 191 grasps the increasing / decreasing tendency of the voltage change rate for the voltage of the first power supply line 10 detected using the A / D converter 196 (S11). Specifically, for example, the differential value is calculated by performing time differentiation on the voltage of the first power supply line 10 separately detected at regular intervals. Thereafter, the CPU 191 determines whether or not the voltage change rate tends to increase (S12). If the voltage change rate tends to increase (S12: YES), that is, if the calculated differential value is positive, the CPU 191 determines that the A / D The terminal voltage of the 1st storage battery 11 is detected using the converter 197, and it is determined whether the 1st storage battery 11 is substantially full charge (S13).

  When the terminal voltage of the first storage battery 11 is not substantially fully charged (S13: NO), the CPU 191 ends the periodic processing in FIG. 4 as it is. When the battery is almost fully charged (S13: YES), the CPU 191 uses the I / O port 194 to operate the DC / AC inverter 14 in order to prevent the terminal voltage of the first storage battery 11 from rising as it is. Turn on. Thereby, the power sale with respect to the electric power grid | system 5 is started (S14). Thereafter, the CPU 191 ends the fixed cycle process of FIG.

  If the voltage change rate does not tend to increase in step S12 (S12: NO), that is, if the calculated differential value is substantially zero or negative, the CPU 191 determines whether or not power is being sold to the power system 5, that is, It is determined whether or not the operation of the DC / AC inverter 14 is turned on (S15). When the power is being sold (S15: YES), the CPU 191 turns off the operation of the DC / AC inverter 14 to stop the power sale in order to store the sold power in the first storage battery 11 (S16). 4 is terminated. When power is not being sold (S15: NO), the CPU 191 determines whether or not the terminal voltage of the first storage battery 11 detected using the A / D converter 197 has decreased to the discharge end voltage (S17).

  If the voltage has not dropped to the discharge end voltage (S17: NO), the CPU 191 ends the fixed-cycle process of FIG. 4 as it is. When the voltage drops to the discharge end voltage (S17: YES), the CPU 191 uses the I / O port 195 to turn off the operation of the DC / DC converter 12 in the direction in which the power is directed to the first power line 10. The discharge of the 1 storage battery 11 is stopped (S18), and the fixed-cycle process of FIG. 4 is complete | finished.

Next, an operation when the moving body 3 is connected to the first power supply line 10 will be described.
FIG. 5 is a flowchart showing the processing procedure of the CPU 391 of the mobile control unit 39 that controls the charging of the third storage battery 31. The process of FIG. 5 is started when the mobile body 3 can be connected to the first power supply line 10 or the second power supply line 20.

  When the process of FIG. 5 is activated, the CPU 391 determines whether or not the moving body 3 is connected to the first power supply line 10 (S21), and waits until it is connected (S21: NO). The connection in this case may be detected from a predetermined voltage applied to the A / D converter 396, for example. Whether the connection destination is the first power supply line 10 or the second power supply line 20 may be detected by using a switch (not shown), for example. When the moving body 3 is connected to the first power supply line 10 (S21: YES), the CPU 391 uses the I / O port 395 to perform the operation of the DC / DC converter 32 in the direction in which the power is directed to the third storage battery 31. By turning on, charging of the third storage battery 31 is started (S22).

  Thereafter, the CPU 391 determines whether or not the voltage of the first power supply line 10 detected using the A / D converter 396 has decreased to a substantially lower limit voltage that is, for example, −10% of the reference voltage (S23). When not decreasing (S23: NO), the terminal voltage of the 3rd storage battery 31 is detected using the A / D converter 397, and it is determined whether the 3rd storage battery 31 is substantially full charge (S24). ). When the battery is not fully charged (S24: NO), the CPU 391 returns the process to step S23. When the battery is fully charged (S24: YES), or when the voltage of the first power supply line 10 has dropped to the substantially lower limit voltage in step S23 (S23: YES), the CPU 391 uses the I / O port 395 to By turning off the operation of the DC / DC converter 32, the charging of the third storage battery 31 is finished (S25), and the processing of FIG. 5 is finished.

Next, the operation on the side of FIG. 2 will be described.
FIG. 6 is a flowchart showing a processing procedure of the CPU 291 of the second control device 29 that controls transmission / reception of power to the power system 5 based on the voltage of the second power supply line 20. The process of FIG. 6 is activated every 5 seconds, for example, but the activation period is not limited to 5 seconds. Note that the result of the CPU 291 controlling the operation of the DC / AC inverter 24 using an I / O port (not shown) (for example, the direction of the converted power and the on / off state) is stored in a RAM (not shown).

  When the process of FIG. 6 is activated, the CPU 291 grasps the increasing / decreasing tendency of the voltage change rate with respect to the voltage of the second power supply line 20 detected using an A / D converter (not shown) (S30). Specifically, for example, the differential value is calculated by performing time differentiation on the voltage of the second power supply line 20 separately detected at regular intervals. Thereafter, the CPU 291 determines whether or not the voltage change rate tends to increase (S31). If the voltage change rate tends to increase (S31: YES), that is, if the calculated differential value is positive, the CPU 291 Then, it is determined whether or not power is being purchased for the power system 5, that is, whether or not the DC / AC inverter 24 is operated as an AC / DC converter (S32). When the power is being purchased (S32: YES), the CPU 291 turns off the operation of the DC / AC inverter 24 as an AC / DC converter, stops the power purchase (S33), and ends the fixed cycle processing of FIG. .

  When power is not being purchased (S32: NO), the CPU 291 detects the terminal voltage of the second storage battery 21 using an A / D converter (not shown), and whether or not the second storage battery 21 is substantially fully charged. Is determined (S34). When it is not substantially full charge (S34: NO), CPU291 complete | finishes the fixed-cycle process of FIG. 6 as it is. When the battery is almost fully charged (S34: YES), the CPU 291 turns on the operation of the DC / AC inverter 24 in order to prevent the terminal voltage of the second storage battery 21 from rising as it is. Thereby, the power sale with respect to the electric power grid | system 5 is started (S35). Thereafter, the CPU 291 ends the periodic processing in FIG.

  When the voltage change rate does not tend to increase in step S31 (S31: NO), that is, when the calculated differential value is substantially zero or negative, the CPU 291 determines whether or not power is being sold to the power system 5, that is, It is determined whether or not the operation of the DC / AC inverter 24 is turned on (S36). When the power is being sold (S36: YES), the CPU 291 stops the power sale by turning off the operation of the DC / AC inverter 24 in order to store the sold power in the second storage battery 21 (S37). Then, the periodic processing in FIG. 6 ends. When the power is not being sold (S36: NO), the CPU 291 determines whether or not the detected terminal voltage of the second storage battery 21 has dropped to a substantially final discharge voltage (S38).

  If the voltage has not dropped to substantially the discharge end voltage (S38: NO), the CPU 291 ends the periodic processing in FIG. 6 as it is. When the voltage drops to the discharge end voltage (S38: YES), the CPU 291 starts power purchase for the power system 5 by operating the DC / AC inverter 24 as an AC / DC converter (S39). Thereafter, the CPU 291 ends the periodic processing in FIG.

Next, an operation when the moving body 3 that moves between remote areas in the power supply system is connected to the second power supply line 20 will be described.
FIG. 7 is a flowchart showing a processing procedure of the CPU 391 of the moving body control unit 39 that controls charging / discharging of the third storage battery 31. The process of FIG. 7 is activated when the mobile body 3 can be connected to the first power supply line 10 or the second power supply line 20.

  When the process of FIG. 7 is activated, the CPU 391 determines whether or not the moving body 3 is connected to the second power supply line 20 (S41), and waits until it is connected (S41: NO). The method for detecting the connection and the connection destination in this case is the same as the method shown in step S21 of FIG. When the moving body 3 is connected to the second power supply line 20 (S41: YES), the CPU 391 determines whether or not charging / discharging has been selected from the operation display unit 33 using the LCD I / F 394 (S42). ), And waits for selection (S42: NO).

  If there is a charge / discharge selection (S42: YES), the CPU 391 determines whether there is a charge selection (S43). If there is a charge selection (S43: YES), the power is Charging of the third storage battery 31 is started by turning on the operation of the DC / DC converter 32 in the direction toward the third storage battery 31 (S46). Henceforth, since the process of step S49, 50, 51 is the same as the process of step S23, 24, 25 of FIG. 5, the description is abbreviate | omitted.

  When there is no selection of charge in step S43 (S43: NO), the CPU 391 determines whether or not there is a selection of discharge (S53). When there is no selection of discharge (S53: NO), charging is also performed. The process of FIG. 7 is terminated without starting the discharge. On the other hand, when the discharge is selected (S53: YES), the CPU 391 turns on the operation of the DC / DC converter 32 in the direction in which the power is directed to the second power supply line 20, thereby discharging the third storage battery 31. Start (S56).

  Thereafter, the CPU 391 determines whether or not the detected voltage of the second power supply line 20 has increased to a substantially upper limit voltage that is, for example, + 10% of the reference voltage (S59), and if not increased (S59: NO) Then, it is determined whether or not the detected terminal voltage of the third storage battery 31 has decreased to the end-of-discharge voltage (S60). If the voltage has not dropped to the discharge end voltage (S60: NO), the CPU 391 returns the process to step 59. When the voltage drops to the end-of-discharge voltage (S60: YES), or when the voltage of the second power supply line 20 rises to the substantially upper limit voltage in step S59 (S59: YES), the CPU 391 turns off the operation of the DC / DC converter 32. As a result, the discharge of the third storage battery 31 is terminated (S61), and the process of FIG. 7 is terminated.

As described above, according to the first embodiment, part or all of the generated power generated by the large-capacity solar power generation device is stored in the first storage battery of the first power storage device, The third storage battery mounted on the mobile body is charged with the power that is not used for storing power in the first storage battery and / or the power stored in the first storage battery. Further, when the moving body moves to an area where the load exists, a part or all of the discharged power discharged from the third storage battery is stored in the second storage battery of the second power storage device. Among these, the power not used for power storage in the second storage battery and / or the power stored in the second storage battery is directed to power to be consumed by the load.
Thus, the electric power generated by the solar power generation device is supplied to the load by the moving body that moves from the region where the large-capacity solar power generation device exists to the region where the load exists. Therefore, power can be interchanged between the microgrids.

  In addition, since the moving body includes a first charger that charges the third storage battery and a second charger that discharges the third storage battery and supplies power to the second storage battery and / or the load. Can be connected to the first power line and the second power line with a single connector. Moreover, it becomes possible to divert the charger / discharger that is normally provided in the moving body.

Furthermore, of the generated power generated by the large-capacity solar power generation device, surplus power that is not used for storing power in the first storage battery and the third storage battery is connected to the first power line via the DC / AC inverter. Send to the grid.
Thereby, it becomes possible to sell the surplus power of the generated power.

Furthermore, a small-capacity solar power generation device as a power generation device that uses natural energy such as sunlight, wind power, and wave power is connected to the second storage battery and the load via the converter and the inverter, respectively.
Therefore, the power generated by the photovoltaic power generation device and the discharged power discharged from the third storage battery of the mobile body are added together, and the power to be stored in the second storage battery and / or the power to be consumed by the load It becomes possible to do.

  Furthermore, each of the second storage battery and the load is connected to the electric power system via a converter and an inverter, and a part or all of the electric power to be used for power storage in the second storage battery and / or consumption at the load. Communicate with the power system. Thereby, it becomes possible to perform power sale and purchase for the power system according to the excess or deficiency of the power to be consumed on the load side.

Furthermore, the operation display unit accepts selection as to whether or not to charge the third storage battery of the mobile body. When the selection to charge is accepted, as long as the power from the small-capacity solar power generation device can cover the power to be consumed by the load and the power to charge the third storage battery, the solar power generation device to the second storage battery A part or all of the electric power to be stored becomes electric power to charge the third storage battery, and the shortage electric power is compensated by the discharge of the second storage battery unless it can be covered.
Therefore, when the moving body is driven by the electric power stored in the third storage battery selected for charging, the moving range of the moving body can be expanded.

Furthermore, the mobile body accepts the selection as to whether or not to charge the third storage battery mounted on the mobile body, the charging performed on the third storage battery through the second power supply line according to the received selection result, and the third storage battery. To discharge through the second power line.
Thereby, it becomes possible to switch charging / discharging of a storage battery from the mobile body side.

  Furthermore, when a selection not to charge the third storage battery is accepted, if the selection is a selection to discharge, the third storage battery is discharged, and if it is not a selection to discharge, neither charging nor discharging is performed. To. The electric power discharged from the third storage battery becomes electric power to be consumed by the load and / or electric power to be stored in the second storage battery.

  In the present embodiment, an example in which DC power is supplied and consumed through each of the first power supply line 10 and the second power supply line 20 has been described. However, the present invention is not limited to this. The supply and consumption of AC power may be performed through each power line. For example, the DC / DC converters 12, 42, 42 connected to the first power supply line 10 are DC / AC inverters, and the first power supply line 10 is linked to the power system 5 via the system I / F 15. Also good. In this case, the voltage, frequency, and phase of the first power supply line 10 are controlled so as to cooperate with the power system 5. Furthermore, in the charge / discharge control for the first storage battery 11, the surplus power of the first power supply line 10 is charged so as not to cause the sale and purchase of power to the power system 5. What is necessary is just to make it discharge to about discharge end voltage so that the power purchase from may not occur.

(Embodiment 2)
While the first embodiment is a form in which the selection of whether or not to charge the third storage battery 31 mounted on the moving body 3 is simply received, the second embodiment is in accordance with the selection of each of charging and discharging. This is a mode for accepting the setting of the charge amount and the discharge amount. Since the block configuration of the power supply system in the second embodiment is the same as that in the first embodiment, the second embodiment will explain the difference from the flowchart executed by the CPU 391 of the mobile 3.

FIG. 8 is a part of a flowchart showing a processing procedure of the CPU 391 of the mobile control unit 39 that controls the charge / discharge amount with respect to the third storage battery 31. The processing of FIG. 8 is common to the processing from step S41 to S43, as compared with the flowchart shown in FIG. 7 of the first embodiment. In the subsequent processes, the same step numbers are assigned to the processes having the same contents.
Note that the initial values of the set values of the charge amount and the discharge amount stored in the RAM 393 are values that are considered to be unlimited. Further, the amount of charge and the amount of discharge of the third storage battery 31 that change from moment to moment are separately accumulated by a process known per se and stored separately in the RAM 393.

  If there is a charge / discharge selection in step S42 (S42: YES), the CPU 391 determines whether there is a charge selection (S43), and if there is a charge selection (S43: YES). The CPU 391 further determines whether or not the charge amount is set from the operation display unit 33 using the LCD I / F 394 (S44). When the charge amount is set (S44: YES), the CPU 391 stores the charge amount set value in the RAM 393 (S45). When the process of step S45 is completed, or when the charge amount is not set in step S44 (S44: NO), the CPU 391 turns on the operation of the DC / DC converter 32 in the direction in which the power is directed to the third storage battery 31. Thus, charging of the third storage battery 31 is started (S46).

  Thereafter, the CPU 391 determines whether or not an instruction to stop charging has been instructed from the operation display unit 33 using the LCD I / F 394 (S47). If instructed (S47: YES), the process proceeds to step S51. When the stop of charging is not instructed (S47: NO), the CPU 391 determines whether or not the charging amount at that time is equal to or higher than the set value (of charging amount) (S48). : YES), the process proceeds to step S51. Since the process of step S49 and step S50, S51 performed when the charge amount at that time is less than a setting value (S48: NO) is the same as that of FIG. 7, the description is abbreviate | omitted.

  Returning to step S43, if there is no charge selection (S43: NO), the CPU 391 determines whether there is a discharge selection (S53), and if there is no discharge selection (S53: NO). The process of FIG. 8 is terminated without starting charging or discharging. On the other hand, when there is a selection of discharge (S53: YES), the CPU 391 further determines whether or not a discharge amount is set from the operation display unit 33 using the LCD I / F 394 (S54). When the discharge amount is set (S54: YES), the CPU 391 stores the discharge amount setting value in the RAM 393 (S55). When the process of step S55 is completed, or when the discharge amount is not set in step S54 (S54: NO), the CPU 391 turns on the operation of the DC / DC converter 32 in the direction in which the power is directed to the second power supply line 20. By doing so, the discharge of the third storage battery 31 is started (S56).

Thereafter, the CPU 391 determines whether or not an instruction to stop discharging is instructed from the operation display unit 33 by using the LCD I / F 394 (S57). If instructed (S57: YES), the process proceeds to step S61. When the stop of discharge is not instructed (S57: NO), the CPU 391 determines whether or not the discharge amount at that time is equal to or greater than the set value (discharge amount) (S58). : YES), the process proceeds to step S61. Since the process of step S59 and step S60, S61 performed when the charge amount at that time is less than a set value (S58: NO) is the same as that of FIG. 7, the description is abbreviate | omitted.
In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.

As described above, according to the second embodiment, when the selection to charge the third storage battery is received, the setting of the charge amount is received, and when the selection to discharge the third storage battery is received, the setting of the discharge amount is received. .
When the setting of the charge amount is accepted, the charge amount of the third storage battery is adjusted according to the accepted set amount. When the setting of the discharge amount is accepted, the discharge amount of the third storage battery according to the accepted set amount. Adjust.
Therefore, it is possible to set the amount of power to be stored in the third storage battery and the amount of power that can be discharged from the third storage battery.

Moreover, when the stop of charging / discharging is received during charging and discharging the third storage battery, charging and discharging of the third storage battery are stopped.
Therefore, for example, charging / discharging can be temporarily stopped and switched from charging to discharging (or from discharging to charging).

(Embodiment 3)
While the first and second embodiments are configured to accept a charge / discharge selection or the like at the operation display unit 33 of the moving body 3, the third embodiment is a charging stand connected to the second power supply line 20 ( The second charger) accepts charge / discharge selection and the like.
FIG. 9 is a block diagram showing a part of a configuration example of the power supply system according to Embodiment 3 of the present invention. In the figure, reference numerals 8 and 8 denote charging stations. The charging station 8 includes a DC / DC converter 82 having one end connected to the second power supply line 20 and a stand controller 89 that controls the operation of the DC / DC converter 82. With. The other end of the DC / DC converter 82 is connected to the third storage battery 31 mounted on the moving body 3 via the connector 38.
The configuration of the charging stand to be connected between the second power supply line 20 and the moving body 3 is the same as that of the charging stand 8.

  The stand control unit 89 includes a CPU 891. The CPU 891 stores a ROM 892 for storing information such as programs, a RAM 893 for storing temporarily generated information, and an LCD I / I for controlling the operation display unit 83 including an LCD and a touch panel. F894 is connected to the bus. The CPU 891 executes processes such as input / output and calculation in accordance with a control program stored in the ROM 892 in advance. The CPU 891 also has operations of A / D converters 896 and 897 for converting the voltage of the second power supply line 20 and the terminal voltage of the third storage battery 31 into digital values and detecting them, and the operation of the DC / DC converter 82. A bus is connected to an I / O port 895 for controlling the direction and on / off of the operation.

Since the processing procedure of the CPU 891 of the stand control unit 89 that controls charging / discharging and charging / discharging amount for the third storage battery 31 is substantially the same as FIG. 7 of the first embodiment and FIG. 8 of the second embodiment. Description of the flowchart is omitted. Specifically, the moving body control unit 39, the DC / DC converter 32, and the operation display unit 33 are replaced with the stand control unit 89, the DC / DC converter 82, and the operation display unit 83, and further moved in step S41. The processing content is changed so that the connection to the body 3 is detected.
In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1 and 2, and the detailed description is abbreviate | omitted.

As described above, according to the third embodiment, the charging stand accepts the selection of whether or not to charge the third storage battery, accepts the setting of the charge amount and the discharge amount according to each selection, Accept charge / discharge stop.
Therefore, selection and setting relating to charging / discharging performed by the mobile body can be performed at the charging stand. In addition, the configuration of the moving body can be simplified.

(Embodiment 4)
In contrast to the first embodiment in which the first storage battery 11 is provided and the photovoltaic power generation devices 4 and 4 and the moving bodies 3, 3,... 3 are connected to one first power supply line 10. In the fourth embodiment, two storage batteries are provided, and the photovoltaic power generation devices 4 and 4 and the moving bodies 3, 3,... 3 are connected to different power supply lines.
FIG. 10 is a block diagram showing a part of a configuration example of the power supply system according to Embodiment 4 of the present invention. Below, it demonstrates centering on a different point from the structure of FIG.

In the figure, reference numeral 1a denotes a first power storage device that stores electric power. The first power storage device 1a includes a first A storage battery 11a and a first B storage battery 11b, and one and the other of the first A storage battery 11a and the first B storage battery 11b. Are provided with DC / DC converters 12a and 12b that autonomously control charging from the first A power line 10a and discharging to the first B power line 10b. The connection between the first A storage battery 11 a and the first B storage battery 11 b and the DC / DC converters 12 a and 12 b is switched by a switch 16.
In the following description, the DC / DC converter 12a is connected to the first A storage battery 11a, and the DC / DC converter 12b is connected to the first B storage battery 11b as an example.

  Connected to the first A power line 10a are photovoltaic power generators 4 and 4, an electric double layer capacitor 13a, and a DC / AC inverter 14 for supplying power from the first A power line 10a to the power system 5. . The moving bodies 3, 3,... 3 and the electric double layer capacitor 13b are connected to the first B power supply line 10b. Here again, the moving bodies 3, 3,... 3 are connected via connectors 38, 38,. The DC / DC converters 12 a and 12 b and the switch 16 are controlled from an I / O port (not shown) of the first control device 19. The voltages of the first A power line 10a and the first B power line 10b and the terminal voltages of the first A storage battery 11a and the first B storage battery 11b are converted into digital values by an A / D converter (not shown) of the first control device 19, respectively. It is supposed to be.

  The DC / DC converter 12a autonomously controls so that the power supplied from the photovoltaic power generation devices 4 and 4 through the first A power line 10a is stored in the first A storage battery 11a. As a result, the voltage fluctuation of the first A power supply line 10a is controlled to be within a predetermined range (for example, ± 10% of the reference voltage). Further, the DC / DC converter 12b is autonomous so that the power to be charged in the third storage batteries 31, 31,... 31 mounted on the moving bodies 3, 3,. Control.

  The first control device 19 detects the voltage of the first A power line 10a in time series, and when the voltage change rate tends to increase, the terminal voltage of the first A storage battery 11a rises to substantially full charge. In this case, when the terminal voltage of the first B storage battery 11b does not rise to substantially full charge, the first A storage battery 11a and the first B storage battery 11b are switched by the switcher 16. When the terminal voltage of the first B storage battery 11b is also increased to substantially full charge, the DC / AC inverter 14 is operated in order to sell power to the power system 5.

  The first control device 19 also detects the terminal voltage of the first B storage battery 11b in time series. When the terminal voltage decreases to the discharge end voltage, the terminal voltage of the first A storage battery 11a decreases to the discharge end voltage. If not, the switch 16 replaces the first A storage battery 11a and the first B storage battery 11b. When the terminal voltage of the first A storage battery 11a is also lowered to the discharge end voltage, the DC / DC converters 12a and 12b are turned off to protect the first A storage battery 11a and the first B storage battery 11b.

Hereinafter, the above-described operation will be described using a flowchart.
FIG. 11 is a flowchart illustrating a processing procedure of the CPU 191 of the first control device 19 that controls switching of the first A storage battery 11a and the first B storage battery 11b based on the voltages of the first A power supply line 10a and the first B power supply line 10b. The process of FIG. 11 is activated, for example, every 5 seconds, but the activation cycle is not limited to 5 seconds. Note that the result of the CPU 191 controlling the operation of the DC / AC inverter 14 and the switch 16 is stored in the RAM 193.

  When the process of FIG. 11 is activated, the CPU 191 grasps the increasing / decreasing tendency of the voltage change rate with respect to the voltage of the first A power supply line 10a detected using an A / D converter (not shown) (S71). Specifically, for example, the differential value is calculated by time-differentiating the voltage of the first A power supply line 10a separately detected at regular intervals. Thereafter, the CPU 191 determines whether or not the voltage change rate is increasing (S72). If the voltage change rate is increasing (S72: YES), that is, if the calculated differential value is positive, the CPU 191 Then, the terminal voltage of the first A storage battery 11a is detected, and it is determined whether or not the first A storage battery 11a is substantially fully charged (S73). When it is not substantially full charge (S73: NO), CPU191 moves a process to step S81 mentioned later.

  When the first A storage battery 11a is substantially fully charged (S73: YES), the CPU 191 detects the terminal voltage of the first B storage battery 11b and determines whether the first B storage battery 11b is also substantially fully charged. (S74). When the battery is almost fully charged (S74: YES), the CPU 191 turns on the operation of the DC / AC inverter 14 to prevent the terminal voltage of the first A storage battery 11a from rising as it is, and the power system 5 Starts selling power to (S75), and proceeds to step S81. When the first B storage battery 11b is not substantially fully charged (S74: NO), the CPU 191 replaces the first A storage battery 11a and the first B storage battery 11b with the switch 16 (S76), and moves the process to step S81.

  When the voltage change rate does not tend to increase in step S72 (S72: NO), that is, when the calculated differential value is substantially zero or negative, the CPU 191 determines whether or not power is being sold to the power system 5. (S77). If the power is not being sold (S77: NO), the CPU 191 moves the process to step S81 without controlling anything. If the power is being sold (S77: YES), the CPU 191 turns off the operation of the DC / AC inverter 14 to stop the power sale (S78), and moves the process to step S81.

  In step S81, the CPU 191 determines whether or not the terminal voltage of the first B storage battery 11b has decreased to a substantially discharge end voltage (S81). 11 periodic processing ends. If the voltage has dropped to the approximate discharge end voltage (S81: YES), the CPU 191 determines whether or not the terminal voltage of the first A storage battery 11a has decreased to the approximate discharge end voltage (S82), and decreases to the approximate discharge end voltage. (S82: YES), the operation of the DC / DC converters 12a, 12b is turned off to stop the discharge of the first A storage battery 11a and the first B storage battery 11b (S83), and the periodic processing of FIG. Exit. When the voltage has not dropped to substantially the discharge end voltage (S82: NO), the CPU 191 replaces the first A storage battery 11a and the first B storage battery 11b with the switch 16 (S84), and ends the fixed cycle process of FIG.

In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.
As described above, according to the fourth embodiment, it is not necessary to make the DC / DC converter for controlling charging / discharging of the first A storage battery and the first B storage battery bidirectional, and the control of charging / discharging is simplified. Is possible. Moreover, it is not necessary to frequently switch charging / discharging of the 1A storage battery and the 1B storage battery, and the battery life can be extended.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1, 1a First power storage device (part of power generation device)
DESCRIPTION OF SYMBOLS 10 1st power supply line 11 1st storage battery 19 1st control apparatus 2 2nd electrical storage apparatus 20 2nd power supply line 21 2nd storage battery 29 2nd control apparatus 3 Mobile body 31 3rd storage battery (storage battery)
32 DC / DC converter (part of the first and second chargers)
33, 83 Operation display section (first receiving means, second receiving means, third receiving means, receiving means)
39 Mobile control unit (part of the first charger and the second charger)
4 Photovoltaic power generation device (part of power generation and storage device)
5 Electric power system 6 Solar power generator (power generator)
7 Load 8 Charging stand (second charger)
82 DC / DC converter 89 Stand control unit 100 Power equipment in factory 200 Power equipment in home

Claims (11)

In a method for supplying power from a power storage device that generates power and stores it in a first storage battery to a load that consumes the power stored in the second storage battery,
Prepare a mobile unit equipped with a third storage battery,
Charging the third storage battery with power generated by the power generation device and / or power stored in the first storage battery;
Moving the moving body;
An electric power supply method comprising: storing electric power to the second storage battery and / or supplying electric power to the load by electric power discharged from the charged third storage battery. In the power supply system that generates power and stores the power in the first storage battery to the load that consumes the power stored in the second storage battery,
A mobile unit equipped with a third storage battery;
A first charger that charges the third storage battery with power generated by the power generation device and / or power stored in the first storage battery;
A power supply system comprising: a second battery that performs power storage to the second battery and / or power to the load by a third battery charged by the first battery charger. .   The power supply system according to claim 2, wherein the moving body includes the first charger and the second charger.   4. The power supply according to claim 2, wherein the power generation and storage device is connected to an electric power system, and a part or all of the generated electric power is supplied to the electric power system. system. It has a power generation device that uses natural energy to generate electricity,
The power transmission according to any one of claims 2 to 4, wherein the power generation device is configured to store power in the second storage battery and / or supply power to the load. Supply system.   The second storage battery and the load are connected to an electric power system, and part or all of the electric power to be stored in the second storage battery and / or the electric power to be consumed by the load is exchanged with the electric power system. The power supply system according to any one of claims 2 to 5, wherein the power supply system is configured as described above. First receiving means for receiving a selection as to whether or not to charge the third storage battery;
When the first accepting unit accepts a selection to charge, the second charger uses the power stored in the second storage battery and / or the power to be stored in the second storage battery to power the third storage battery. The power supply system according to any one of claims 2 to 6, wherein charging is performed.   The second charger discharges the third storage battery when the first receiving means receives a selection not to charge, and stores power to the second storage battery and / or supplies power to the load. The power supply system according to any one of claims 2 to 6, wherein: According to the selection result received by the first receiving means, the second receiving means for receiving a setting of the charge amount or the discharge amount,
The said 2nd charger adjusts the charge amount or discharge amount of a said 3rd storage battery according to the setting of the charge amount or discharge amount which the said 2nd reception means received. The power supply system according to 7 or 8. Comprising third receiving means for receiving a charge / discharge stop during charging / discharging of the third storage battery;
10. The electric power according to claim 7, wherein the second charger stops charging and discharging of the third storage battery when the third receiving unit receives the second charger. 11. Feeding system. In a mobile unit equipped with a storage battery for storing electric power, and equipped with a charger for charging the storage battery with electric power from an external device,
Receiving means for accepting selection of charging or discharging the storage battery;
The charger is configured to be able to discharge from the storage battery to an external device, and is configured to switch between charging and discharging according to a selection result received by the receiving unit. Moving body.

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