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:
Nov. 30, 2010
Filed:
Oct. 12, 2006
Hung-liang Chou, Kaohsiung, TW;
Wen-jung Chiang, Kaohsiung, TW;
Chin-chang Wu, Kaohsiung, TW;
Ya-tsung Feng, Kaohsiung, TW;
Hung-Liang Chou, Kaohsiung, TW;
Wen-Jung Chiang, Kaohsiung, TW;
Chin-Chang Wu, Kaohsiung, TW;
Ya-Tsung Feng, Kaohsiung, TW;
Ablerex Electronics Co., Ltd., Hsintein, TW;
Abstract
An islanding detection apparatus for a distributed generation power system and a detection method therefor operates a power converter to act as a virtual capacitor or inductor at a frequency close to but unequal to that of a utility power system under abnormal condition of the utility power system. When power failure occurs in the utility power system, only the distributed generation power system supplies power to a load so that a load voltage has been changed in at least one of amplitude and frequency which can be immediately detected islanding phenomenon.