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:
Apr. 04, 2017
Filed:
Oct. 31, 2011
Biyao Huang, Beijing, CN;
Jianqi LI, Beijing, CN;
Guojun Liu, Beijing, CN;
Zhihui Wang, Beijing, CN;
Nan Quan, Beijing, CN;
Xiaofeng Qu, Beijing, CN;
Tao Zhao, Beijing, CN;
Licheng Wang, Beijing, CN;
Biyao Huang, Beijing, CN;
Jianqi Li, Beijing, CN;
Guojun Liu, Beijing, CN;
Zhihui Wang, Beijing, CN;
Nan Quan, Beijing, CN;
Xiaofeng Qu, Beijing, CN;
Tao Zhao, Beijing, CN;
Licheng Wang, Beijing, CN;
STATE GRID CORPORATION OF CHINA, Beijing, CN;
China Electric Power Research Institute, Beijing, CN;
Abstract
A detection system of distributed generation islanding based on power frequency carrier, the detection system comprising: a power frequency carrier signal generating device; a power frequency carrier signal detection device; a signal coupling transformer; a substation bus; a distribution power generator (DG); and a safety isolation breaker, wherein the power frequency carrier signal generating device comprises a voltage and current monitor circuit, the power frequency carrier signal generating device is connected with the signal coupling transformer through four three phase four line power cables, and the signal coupling transformer is connected with substation bus through 3 power cables.