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. 26, 2019
Filed:
Feb. 18, 2019
Applicant:
Huawei Technologies Co., Ltd., Shenzhen, CN;
Inventors:
Assignee:
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 23/15 (2006.01); G01R 31/02 (2006.01); H02J 3/38 (2006.01); H02M 1/00 (2006.01); H02M 7/5387 (2007.01);
U.S. Cl.
CPC ...
G01R 23/15 (2013.01); G01R 31/024 (2013.01); H02J 3/383 (2013.01); H02J 2003/388 (2013.01); H02M 7/53873 (2013.01); H02M 2001/0012 (2013.01);
Abstract
An islanding detection method and apparatus for an inverter, and a power supply system to resolve a problem that an existing voltage total harmonic distortion (THD)-based islanding detection method has low islanding detection reliability due to existence of a relatively large detection dead zone. According to this detection method, the voltage total harmonic distortion changes more significantly before and after the islanding effect of the inverter occurs in order to reduce an islanding detection dead zone and improve islanding detection reliability.