Title:
POWER DISTRIBUTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/001796
Kind Code:
A1
Abstract:
A system connection unit (1) is provided with an adverse current prevention circuit (10). When the electric power output from a fuel cell (6) and a secondary cell (7) is larger than the electric power consumed by an alternate current load and a direct current load, the adverse current prevention circuit (10) prevents the surplus electric power from adversely flowing to a commercial power source (4) side. The adverse current prevention circuit (10) is inserted between a connecting point of a solar cell (5) and a connecting point of the fuel cell (6) and the secondary cell (7), on an alternate current system main electric path (20). The adverse current prevention circuit (10) compares the electric power output from the fuel cell (6) and the secondary cell (7) and the electric power consumed by the alternate current load and the direct current load; and when the former becomes larger than the latter, electrically blocks the alternate current system main electric path (20). Thereby, using only the adverse current prevention circuit (10), the electric power output from the fuel cell (6) and the secondary cell (7) can be prevented from adversely flowing to the commercial power source (4) side. Compared to the case wherein each dispersed power source other than the solar cell (5) is provided with an adverse current prevention device, the cost of the system can be reduced.
Inventors:
CYUZAWA TAKAAKI (JP)
SHINAGAWA MIKIO (JP)
SHINAGAWA MIKIO (JP)
Application Number:
PCT/JP2010/059714
Publication Date:
January 06, 2011
Filing Date:
June 08, 2010
Export Citation:
Assignee:
PANASONIC ELEC WORKS CO LTD (JP)
CYUZAWA TAKAAKI (JP)
SHINAGAWA MIKIO (JP)
CYUZAWA TAKAAKI (JP)
SHINAGAWA MIKIO (JP)
International Classes:
H02J3/38
Domestic Patent References:
| WO2009072415A1 | 2009-06-11 |
Foreign References:
| JP2002199592A | 2002-07-12 | |||
| JP2007267508A | 2007-10-11 | |||
| JPH06165395A | 1994-06-10 | |||
| JP2009033797A | 2009-02-12 | |||
| JP2003189477A | 2003-07-04 |
Attorney, Agent or Firm:
NISHIKAWA, Yoshikiyo et al. (JP)
Yoshikiyo Nishikawa (JP)
Yoshikiyo Nishikawa (JP)
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