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:
Feb. 28, 2017
Filed:
Apr. 14, 2014
Nr Electric Co., Ltd., Jiangsu, CN;
Nr Engineering Co., Ltd., Jiangsu, CN;
Qixue Zhang, Jiangsu, CN;
Jun Chen, Jiangsu, CN;
Wei Yan, Jiangsu, CN;
Xiangjian Shi, Jiangsu, CN;
Guang Wang, Jiangsu, CN;
Wei Yan, Jiangsu, CN;
Weiqun Liu, Jiangsu, CN;
Quanrong Shen, Jiangsu, CN;
NR ELECTRIC CO., LTD., , CN;
NR ENGINEERING CO., LTD., , CN;
Abstract
Embodiments of the present invention disclose a current source converter differential protection method, including: sampling, by a relay protection device, secondary side currents of current transformers on two sides of a protected current source converter, to obtain incomer-side three-phase currents, and outgoer-side three-phase currents; rectifying the incomer-side three-phase currents and the outgoer-side three-phase currents, to obtain an incomer-side input current and an outgoer-side output current which are equivalent; converting the incomer-side input current and the outgoer-side output current according to a current ratio of the current transformers on the two sides, to acquire a transient differential current and a transient restraint current; acquiring a differential current and a restraint current according to the transient differential current and the transient restraint current; and achieving differential protection according to the differential current and the restraint current. The embodiments of the present invention further disclose a relay protection device correspondingly.