Title:
POWER CONVERSION DEVICE FOR PHOTOVOLTAIC POWER GENERATION AND PHOTOVOLTAIC POWER GENERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/179478
Kind Code:
A1
Abstract:
The present invention provides a control device capable of enabling power conversion devices for photovoltaic power generation to properly suppress outputs thereof in accordance with a power suppression command. The photovoltaic power generation system according to the present invention has: multiple solar panels; multiple power conversion devices for photovoltaic power generation, which convert direct-current power output by the respective solar panels into alternating-current power and output the alternating-current power to the grid; and a control unit. When the output to the grid is to be increased, if there is a first power conversion device with an output which tends to decrease when the panel voltage of the corresponding solar panel is changed, the control unit increases the output of a second power conversion device, different from the first power conversion device, having an output which tends to increase when the panel voltage of the corresponding solar panel is changed. Alternatively, when the output to the grid is to be decreased, if there is a third power conversion device with an output which tends to increase when the panel voltage of the corresponding solar panel is changed, the control unit decreases the output of a fourth power conversion device, different from the third power conversion device, having an output which tends to decrease when the panel voltage of the corresponding solar panel is changed.
Inventors:
KIKUCHI AKIRA (JP)
ITOU TOMOMICHI (JP)
ITOU TOMOMICHI (JP)
Application Number:
PCT/JP2017/014335
Publication Date:
October 19, 2017
Filing Date:
April 06, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02J3/38; G05F1/67
Foreign References:
| JP2002199589A | 2002-07-12 | |||
| JP2014067259A | 2014-04-17 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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