JP2013031295A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accommodate insufficient photovoltaic power generation and power failure by monitoring and adjusting a charge state of each battery, making effective use of batteries of a plurality of working vehicles without need for preparing storage batteries for housing.SOLUTION: The power supply system, in which a photovoltaic power generator (1) and respective batteries (7, 10, 13, 16) of a plurality of working vehicles (5, 8, 11, 14) are connected with a power distribution system, includes a main controller (4) that monitors charging states of the respective batteries (7, 10, 13, 16). A surplus of the power generated by the photovoltaic power generator (1) is sequentially charged into, first, the battery with smaller charge amount according to the charge amount of the respective batteries (7, 10, 13, 16) to maintain the respective batteries (7, 10, 13, 16) in a constantly usable charge state.

Description

  The present invention relates to a power receiving system.

As a home power receiving system, there is a configuration described in Patent Document 1.
The configuration compares the costs of the power obtained by photovoltaic power generation, the late-night power of the external system, and the general power of the external system, and the low-cost power is given priority to residential electrical equipment and residential storage batteries. And it is the structure which made it possible to supply to the storage battery for vehicles of an electric vehicle, and was able to sell the surplus of the electric power obtained by solar power generation by sending it to an external system.

  Further, when the surplus power obtained by solar power generation cannot be sold to an external system, the surplus power obtained by solar power generation is charged to a storage battery for a house and / or a vehicle storage battery for an electric vehicle. This is the configuration.

JP-A-11-178237

  The conventional household power supply system includes a residential battery and / or a vehicle battery for an electric vehicle, and charges a surplus of power obtained by solar power generation. Need a charging device and a residential battery.

  Even if a storage battery for housing is not prepared, the present invention can effectively use the batteries of a plurality of work vehicles to monitor and adjust the charging state of each battery, thereby responding to a case where photovoltaic power generation is insufficient or a power failure The challenge is to make it possible.

The problems of the present invention are solved by the following technical means.
The invention according to claim 1 is a power supply system in which the solar power generation device (1) and the batteries (7, 10, 13, 16) of the plurality of work vehicles (5, 8, 10, 14) are connected to the power distribution system. The main control device (4) for monitoring the state of charge of each of the batteries (7, 10, 13, 16), and surplus power out of the power generated by the solar power generation device (1) is supplied to each of the batteries ( 7, 10, 13, 16), and sequentially charging from the battery with the smaller charge amount to maintain each battery (7, 10, 13, 16) in a chargeable state that can be used at all times. Power receiving system.

  According to the second aspect of the present invention, when commercial power supply is stopped, power is supplied from each battery (7, 10, 13, 16) of the plurality of work vehicles (5, 8, 10, 14). The power receiving system according to claim 1, wherein

According to a third aspect of the present invention, the main control device (4) is provided with a time measuring means (19), and the operation time of each work vehicle (5, 8, 10, 14) belongs to the current time ( The power receiving system according to claim 1 or 2, wherein the battery (7, 10, 13, 16) of 5, 8, 10, 14) is preferentially charged.
According to a fourth aspect of the present invention, preferential charging for the batteries (7, 10, 13, 16) of the work vehicle (5, 8, 10, 14) is performed by surplus power from the solar power generation device (1). And an electric power supply system according to claim 3, wherein the electric power supply system is supplied with charging power from a non-priority work vehicle.

  According to the first aspect of the present invention, the electric power generated by the solar power generation device (1) is mainly used as electric power for household electrical equipment, and a plurality of work vehicles (5, 8, 10, 14) with surplus power. The battery (7, 10, 13, 16) of the work vehicle (5, 8, 10, 14) is surplus without preparing a home battery. Since it is used for power storage, the cost of a household power supply system can be reduced.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the battery (7, 10, 13) of the work vehicle (5, 8, 10, 14) when the household power fails. , 16) to supply household power consumption, there is no need to provide separate household power, and a low-cost household power supply system can be constructed.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, for example, if the work vehicle is a passenger car, the battery is always preferentially charged, and if it is a rice transplanter, By preferentially charging the battery in June, the necessary work vehicle can be maintained in a usable state even when the surplus power is low.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the work vehicle (5, 8, 10, 14) that is given priority even if the surplus power of the solar power generation device (1) is small. Can always be used.

It is a conceptual diagram of a household power supply system. It is a flowchart figure of the mutual charge control of a some work vehicle. It is a flowchart figure of the mutual charge control of a some work vehicle. It is a flowchart figure of the mutual charge control of a some work vehicle. It is a flowchart figure of the mutual charge control of a some work vehicle. It is a control flowchart figure in case a household supply electric power fails. It is a charge control flowchart figure of the work vehicle used always. It is a control flowchart figure of a rice planting machine. It is a charge control flowchart figure of a combine.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
FIG. 1 is a schematic diagram of a household power supply system according to the present invention. The first smart meter 3 monitors and controls power supply and distribution of a solar power generation device 1 attached to the roof of a house 2, and an automobile 5 and a tractor as a work vehicle. 8, rice planting machine 11, and combine 14 are prepared, power supply / distribution to vehicle battery 7 of vehicle 5 is monitored and controlled by second smart meter 6, and power supply / distribution to tractor battery 10 of tractor 8 is monitored and controlled by third smart meter 9. The fourth smart meter 12 monitors and controls the supply and distribution of the rice planting machine 11 to the rice planting machine battery 13, and the fifth smart meter 15 monitors and controls the supply and distribution of the combine 14 to the combine battery 16.

  In addition, the vehicle battery 7, the tractor battery 10, the rice planting machine battery 13, and the combine battery 16 may be a battery that supplies power to a driving motor for traveling or a battery that supplies power to electrical components.

  The photovoltaic power generator 1, the automobile battery 7, the rice planting machine battery 10, and the combine battery 16 are connected by a power line 18, and the first smart meter 3, the second smart meter 6, the third smart meter 9, and the fourth smart meter 12 The fifth smart meter 15 is connected to the main control device 4 by a signal line 17 and controls the power supply and distribution of each smart meter 3, 6, 9, 12, 15 according to a command from the main control device 4.

The main control device 4 is provided with time measuring means 19 to notify the main control device 4 of the change of seasons.
FIGS. 2 to 5 are control flowcharts when the power generation amount of the photovoltaic power generator 1 is small and power is not supplied to the batteries 7, 10, 13, and 16 of the work vehicles 5, 8, 11, and 14. Power is supplied from the work vehicle with the highest charge to the work vehicle with the lowest charge. By repeating this control, the charge amounts of the work vehicles 5, 8, 11, and 14 are kept the same.

  First, in steps S1 to S4, the charge amounts of the automobile battery 7, the tractor battery 10, the rice planting machine battery 13 and the combine battery 16 are read from the smart meters 6, 9, 12 and 15 into the main controller 4, and steps S5 and 8 are performed. 14, the battery with the largest amount of charge is determined. For example, when the amount of charge of the automobile battery 7 is the largest at step S 5, the tractor battery 10 and the rice transplanter at steps S 6, S 7, S 25, S 26, S 27. Electric power is supplied from the automobile battery 7 to the battery with the smallest charge amount among the battery 13 and the combine battery 16 and charged.

  Further, when the amount of charge of the tractor battery 10 is the largest in step S8, the amount of charge is the smallest among the car battery 7, the rice transplanter battery 13 and the combine battery 16 in steps S9, S10, S11, S12 and S13. The battery is charged by supplying power from the tractor battery 10.

  Moreover, when the amount of charge of the rice planting machine battery 13 is the largest at step S14, the amount of charge is the smallest among the car battery 7, the tractor battery 10 and the combine battery 16 at steps S15, S16, S17, S18, S19. The battery is charged by supplying power from the rice planting machine battery 13.

  Further, when the determination in step S14 is NO and the amount of charge of the combine battery 16 is the largest, in steps S20, S21, S22, S23, and S24, one of the car battery 7, the tractor battery 10, and the rice transplanter battery 13 is the same. Electric power is supplied from the combine battery 16 to a battery with a small charge amount and charged.

  In the above description, power is interchanged between the automobile battery 7, the tractor battery 10, the rice transplanter battery 13, and the combine battery 16, but for example, only between the tractor battery 10 and the rice planter battery 13 or the tractor battery 10. The power exchange may be performed only between the rice planting machine battery 13 and the combine battery 16.

  FIG. 6 shows the power supply in the emergency when the power supply from the commercial power to the house 2 is stopped when it is cloudy and the power generation amount of the photovoltaic power generator 1 is small, and the charge amounts of the automobile battery 7 and the tractor battery 10 If there are many or both of them, power is supplied from both to the house 2 side.

  The vehicle 2 and the rice planter battery 13, the vehicle battery 7 and the combine battery 16, the vehicle battery 7, the tractor battery 10, the rice planter battery 13 and the combine battery 16 may supply emergency power to the house 2. .

  FIG. 7 shows the power management in the case where the solar power generation device 1 generates enough power and has surplus power for household use, and the charge amount of the car battery 7 and the tractor battery 10 is confirmed and the battery is not fully charged. The vehicle 5 and the tractor 8 are always kept fully charged.

FIG. 8 shows the control for preferentially fully charging the rice planting machine battery 13 when the clocking means 17 of the main control device 4 clocks the springs of April, May and June.
Similarly, in FIG. 9, when the time measuring means 19 of the main control device 4 measures the fall of August, September, October, and November, particularly, the combine battery 16 is preferentially fully charged.

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation device 4 Main control device 5 Car 7 Car battery 8 Tractor 10 Tractor battery 11 Rice planting machine 13 Rice planting machine battery 14 Combine 16 Combine battery 19 Timekeeping means

Claims (4)

  In the power supply system in which the solar power generation device (1) and the batteries (7, 10, 13, 16) of the plurality of work vehicles (5, 8, 10, 14) are connected to the power distribution system, the batteries (7, 10, 13, 16) provided with a main control device (4) for monitoring the state of charge, and surplus power out of the power generated by the solar power generation device (1) is supplied to each of the batteries (7, 10, 13, 16). The power receiving system is characterized in that the batteries (7, 10, 13, 16) are sequentially charged from a battery with a small amount of charge according to the amount of charge, and the batteries (7, 10, 13, 16) are maintained in a chargeable state that can be used at all times.   The electric power is supplied from each battery (7, 10, 13, 16) of the plurality of work vehicles (5, 8, 10, 14) when the supply of commercial electric power is stopped. Electricity receiving system.   The main control device (4) is provided with time measuring means (19), and the work vehicle (5, 8, 10, 14) in which the operation time of each work vehicle (5, 8, 10, 14) belongs to the current time. The power receiving system according to claim 1 or 2, wherein the battery (7, 10, 13, 16) is preferentially charged.   The preferential charging for the batteries (7, 10, 13, 16) of the work vehicle (5, 8, 10, 14) is performed by supplying surplus power from the solar power generation device (1) and non-priority work vehicles. The power receiving system according to claim 3, wherein charging is performed by supplying charging power from.

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