Power operation system, power operation method and photovoltaic power generator

• US 8,922,059 B2
• Filed: 11/09/2010
• Issued: 12/30/2014
• Est. Priority Date: 11/16/2009
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yoneda, Tetsuya, Nishimura, Naoto, Mitate, Takehito
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Kessie, Daniel
• Application Number:
  US12/942,485
• Publication Number:
  US 20110115292A1
• Time in Patent Office: 1,512 Days
• Field of Search: 307/38, 307/43, 307/44, 307/48, 307 64- 66, 307 81- 84, 307/141, 320/101, 323/906
• US Class Current: 307/66
• 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 and installed in different houses, respectively,

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,

at least one of a plurality of said battery control units 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.

2. A power operation system comprising:

a plurality of photovoltaic power generators connected to an electric power system through one same receiving end and installed in different houses, respectively,

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.

3. A power operation method using a plurality of photovoltaic power generators connected to an electric power system through one same receiving end and installed in different houses, respectively,

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:

at least one of the plurality of said battery control units 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 at least one of a plurality of said battery control units 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.

4. The power operation method according to claim 3, wherein

at least one of said plurality of photovoltaic power generators further includes a detecting unit detecting an output value of electric power from said solar cell, and

said power operation method comprising:

said at least one of a plurality of said battery control units determining whether or not said output value reached a prescribed value, using said detecting unit, and determining said first and second time periods based on a time point when said output value reached said prescribed value, or

said at least one of a plurality of said battery control units determining whether or not said solar cell output electric power, using said detecting unit, and determining said first and second time periods based on a time point when said solar cell started to output the electric power.

5. A power operation method using a plurality of photovoltaic power generators connected to an electric power system through one same receiving end and installed in different houses, respectively, 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:

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.

6. The power operation method according to claim 5, wherein

at least one of said plurality of photovoltaic power generators further includes a detecting unit detecting an output value of electric power from said solar cell, and

said power operation method comprising:

said central control unit determining whether or not said output value reached a prescribed value, using said detecting unit, and determining said first and second time periods based on a time point when said output value reached said prescribed value, or

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

7. 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 photovoltaic power generator and said another photovoltaic power generator are installed in different houses, respectively, and

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.

8. The photovoltaic power generator according to claim 7, further comprising:

a detecting unit detecting an output value of electric power from said solar cell,

said battery control unit determining whether or not said output value reached a prescribed value, using said detecting unit, and determining said first and second time periods based on a time point when said output value reached said prescribed value, or

determining whether or not said solar cell output electric power, using said detecting unit, and determining said first and second time periods based on a time point when said solar cell started to output the electric power.

9. 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,

at least one of said plurality of photovoltaic power generators further including a detecting unit detecting an output value of electric power from said solar cell, and

at least one of a plurality of said battery control units 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, and

determining whether or not said output value reached a prescribed value, using said detecting unit, and determining said first and second time periods based on a time point when said output value reached said prescribed value, or

determining whether or not said solar cell output electric power, using said detecting unit, and determining said first and second time periods based on a time point when said solar cell started to output the electric power.

10. 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,

at least one of said plurality of photovoltaic power generators further including a detecting unit detecting an output value of electric power from said solar cell, and

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,

said central control unit determining whether or not said output value reached a prescribed value, using said detecting unit, and determining said first and second time periods based on a time point when said output value reached said prescribed value, or

determining whether or not said solar cell output electric power, using said detecting unit, and determining said first and second time periods based on a time point when said solar cell started to output the electric power.