SOLAR POWER GENERATION SYSTEM

• US 20130033111A1
• Filed: 06/19/2012
• Published: 02/07/2013
• Est. Priority Date: 08/03/2011
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KAWAMOTO, Shinya, ENDO, Tamotsu
• Application Number:
  US13/527,035
• Publication Number:
  US 20130033111A1
• Time in Patent Office: Days
• US Class Current: 307/66
• CPC Class Codes: G05F 1/67 to the maximum power available from a generator, e.g. from solar cell
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

A system includes a solar power generator having plural arrays and a power storage device having plural secondary batteries. The solar power generator and the power storage device are respectively provided with DC/DC converters coupled together, and each DC/DC converter is coupled with an AC/DC converter to configure a power generating/storing unit. Such units are coupled to an electricity distribution system through respective AC/DC converter. The solar power generator of each unit is provided with a control unit performing maximum power point tracking control so as to obtain the maximum output characteristic of the solar power generator. The power storage device is provided with a control unit detecting a voltage at the battery side and controlling charging/discharging thereof. Moreover, an integrated control device coupled with respective control units and controlling charging/discharging and an output is provided.

Claims

1. A solar power generation system comprising a solar power generator including a plurality of arrays, and a power storage device including a plurality of secondary batteries,

the solar power generator and the power storage device being respectively provided with DC/DC converters which are coupled together, and each DC/DC converter being coupled with an AC/DC converter to configure a power generating/storing unit,

a plurality of the units being prepared and coupled with an electricity distribution system through respective AC/DC converters,

the solar power generator of each unit being provided with a control unit that performs maximum power point tracking control so as to obtain a maximum output characteristic of the solar power generator,

the power storage device of each unit being provided with a control unit which detects a voltage at the battery side and which controls charging/discharging of the battery,

the solar power generation system further comprising an integrated control device which is connected to respective control units of each unit via a communication link and controls charging/discharging of each unit and an output of each unit,

the integrated control device calculating a target output value of a whole system based on an output value by the solar power generator of each unit, and transmitting the calculated target output value to the AC/DC converter of each unit, and

the AC/DC converter of each unit being provided with a control unit that controls the AC/DC converter to establish a system interconnection based on the target output value received from the integrated control device.

2. The solar power generation system according to claim 1, wherein the plurality of solar power generation systems each including the plurality of units are coupled to the electricity distribution system in a parallel connection manner.

3. The solar power generation system according to claim 1, wherein at least one of the units includes the power storage device that is a pumped-storage power generator.

4. The solar power generation system according to claim 1, wherein at least one of the units includes the power storage device that comprises a weight ascended/descended by a motor and a power generator which generates power by a positional energy of the weight.

5. The solar power generation system according to claim 4, wherein the weight is the secondary battery of the power storage device.

6. The solar power generation system according to claim 1, wherein at least one of the units includes the power storage device that comprises a compressed air tank which reserves air compressed by a compressor and a power generator which is driven by the air from the compressed air tank.