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:
Mar. 30, 2021
Filed:
May. 22, 2018
Nr Electric Co., Ltd., Jiangsu, CN;
Nr Engineering Co., Ltd., Jiangsu, CN;
Lei Pan, Jiangsu, CN;
Jie Tian, Jiangsu, CN;
Yunlong Dong, Jiangsu, CN;
Yu Lu, Jiangsu, CN;
Ruhai Huang, Jiangsu, CN;
Chongxue Jiang, Jiangsu, CN;
Jiang Lu, Jiangsu, CN;
Baoshun Zhang, Jiangsu, CN;
Defeng Qiu, Jiangsu, CN;
Hua Xie, Jiangsu, CN;
NR ELECTRIC CO., LTD., Jiangsu, CN;
NR ENGINEERING CO., LTD., Jiangsu, CN;
Abstract
A method and apparatus for suppressing the impact of a compensator on line distance protection is provided, wherein the method comprises: obtaining a first current of a line connected to a compensator or series converters in the compensator, and a first voltage of a bus connected to the compensator or the line connected to the compensator; exiting the series converters and series transformers if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold; exiting the series converters and the series transformers if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet; and otherwise, canceling the setting of the output voltage of the series converters to zero and obtaining a first current if a second voltage of the line corresponding to the first voltage is greater than the preset voltage threshold and the duration is greater than a third preset time threshold.