POWER OPERATION SYSTEM, POWER OPERATION METHOD AND PHOTOVOLTAIC POWER GENERATOR

• US 20110115292A1
• Filed: 11/09/2010
• Published: 05/19/2011
• Est. Priority Date: 11/16/2009
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Mitate, Takehito, YONEDA, Tetsuya, Nishimura, Naoto
• Granted Patent: US 8,922,059 B2
• Time in Patent Office: Days
• US Class Current: 307/38
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/46 Controlling of the sharing of output between the generators, converters, or transformers
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

Each of a plurality of photovoltaic power generators includes a solar cell, a storage battery, a communication interface for communication, and a battery control unit for controlling storage of electric power and output of electric power to an electric power system. The battery control unit of the first photovoltaic power generator included in the plurality of photovoltaic power generators causes the first photovoltaic power generator to prioritize output of the electric power to the electric power system over storage of the electric power during the first time period, and causes the second photovoltaic power generator included in the plurality of photovoltaic power generators to prioritize output of the electric power to the electric power system over storage of the electric power during the second time period delayed by a prescribed time period from the first time period, through the communication interface.

Claims

1. A power operation system comprising:

a plurality of photovoltaic power generators connected to an electric power system through one same receiving end,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power,

a communication interface for communication with another photovoltaic power generator, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said battery control unit of a first photovoltaic power generator included in said plurality of photovoltaic power generators causing said first photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period, and causing a second photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period, through said communication interface.

2. The power operation system according to claim 1, wherein

said first photovoltaic power generator further includes a detecting unit detecting an output value of electric power from said solar cell, and

said battery control unit of said first photovoltaic power generator determines whether or not said output value reached a prescribed value, using said detecting unit, and determines said first and second time periods based on a time point when said output value reached said prescribed value.

3. The power operation system according to claim 1, wherein

said first photovoltaic power generator further includes a detecting unit detecting an output value of electric power from said solar cell, and

said battery control unit of said first photovoltaic power generator determines whether or not said solar cell output electric power, using said detecting unit, and determines said first and second time periods based on a time point when said solar cell started to output the electric power.

4. A power operation system comprising:

a plurality of photovoltaic power generators connected to an electric power system through one same receiving end,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said power operation system further comprising;

a central control unit for causing a first photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period, and causing a second photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period.

5. A power operation system comprising:

a plurality of photovoltaic power generators connected to an electric power system through one same receiving end,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power,

a communication interface for communication with another photovoltaic power generator, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said battery control unit of a first photovoltaic power generator included in said plurality of photovoltaic power generators causing said first photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period, and

said battery control unit of a second photovoltaic power generator included in said plurality of photovoltaic power generators causing said second photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period.

6. A power operation method using a plurality of photovoltaic power generators connected to an electric power system through one same receiving end,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power,

a communication interface for communication with another photovoltaic power generator, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said power operation method comprising the steps of:

said battery control unit of a first photovoltaic power generator included in said plurality of photovoltaic power generators

causing said first photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period; and

causing a second photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period, through said communication interface.

7. A power operation method using a plurality of photovoltaic power generators connected to an electric power system through one same receiving end, and a central control unit,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said power operation method comprising the steps of:

said central control unit causing a first photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period; and

said central control unit causing a second photovoltaic power generator included in said plurality of photovoltaic power generators to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period.

8. A power operation method using a plurality of photovoltaic power generators connected to an electric power system through one same receiving end,

each of said plurality of photovoltaic power generators including

a solar cell receiving sunlight and outputting electric power,

a storage battery for storing said electric power, and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said power operation method comprising the steps of:

said battery control unit of a first photovoltaic power generator included in said plurality of photovoltaic power generators causing said first photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period; and

said battery control unit of a second photovoltaic power generator included in said plurality of photovoltaic power generators causing said second photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period.

9. A photovoltaic power generator comprising:

a solar cell receiving sunlight and outputting electric power;

a storage battery for storing said electric power;

a communication interface for communication with another photovoltaic power generator connected to an electric power system through one same receiving end; and

a battery control unit for controlling storage of said electric power and output of said electric power to said electric power system,

said battery control unit causing said photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a first time period, and causing at least one said another photovoltaic power generator to prioritize output of said electric power to said electric power system over storage of said electric power during a second time period delayed by a prescribed time period from said first time period, through said communication interface.