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. 09, 2021
Filed:
Apr. 25, 2017
Nr Electric Co., Ltd, Jiangsu, CN;
Nr Engineering Co., Ltd, Jiangsu, CN;
Wei Shi, Jiangsu, CN;
Bing Yang, Jiangsu, CN;
Wei Lv, Jiangsu, CN;
Wenjie Wang, Jiangsu, CN;
Yeyuan Xie, Jiangsu, CN;
Taixun Fang, Jiangsu, CN;
Dongming Cao, Jiangsu, CN;
NR ELECTRIC CO., LTD, Jiangsu, CN;
NR ENGINEERING CO., LTD, Jiangsu, CN;
Abstract
A closing control method for a high-voltage DC circuit breaker. The method comprises: closing breaking units of the transfer branch () group by group, then closing the main branch (), and finally open the transfer branch. During the process of closing the breaking units of the transfer branch group by group, determine whether there is a fault in the power transmission system after closing current breaking unit group. if there is no fault, proceed to close the next breaking unit group until all breaking unit groups are closed before proceeding to the next step; if there is a fault, all the breaking units that have been closed are opened and the closing operation is ended. The method can pre-charge the power transmission system during the closing process of the high-voltage DC circuit breaker, and lower the overvoltage and system oscillation caused by the closing operation.