The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2012
Filed:
Jun. 29, 2010
Applicants:
Kansuke Fujii, Tokyo, JP;
Toshiya Yamada, Kobe, JP;
Masaki Katoh, Kobe, JP;
Inventors:
Assignee:
Fuji Electric Co., Ltd., Kawasaki-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
During single operation of a distributed power supply system that has been disconnected from a commercial electric power system, a frequency increase monitoring circuit is operated and an instruction to output a larger amount of a constant reactive current is given to a reactive current controlling unit. After the output frequency of the distributed power supply exceeds a frequency increase level, the level of an active current is limited in accordance with the level of the outputted reactive current.