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:
Aug. 27, 2019
Filed:
Jul. 01, 2013
Nr Electric Co., Ltd, Nanjing, CN;
Nr Engineering Co., Ltd, Nanjing, CN;
Yunlong Dong, Nanjing, CN;
Jie Tian, Nanjing, CN;
Gang Li, Nanjing, CN;
Dongming Cao, Nanjing, CN;
Haiying Li, Nanjing, CN;
Haibin Liu, Nanjing, CN;
NR ELECTRIC CO., LTD, Nanjing, CN;
NR ENGINEERING CO., LTD, Nanjing, CN;
Abstract
The present invention discloses a coordination control method of a multi-terminal VSC-HVDC transmission system. If a direct current voltage master control station shuts down, a direct current voltage control slave station takes over direct current voltage control, and remaining convertor stations keep original control modes. The takeover steps comprise that under the condition that inter-station communications are effective, the master control station sends a shutdown message to the slave station through the inter-station communications, and when the slave station monitors that the direct current voltage master control station shuts down, the slave station switches a current control mode into a direct current voltage control mode; and under the condition that inter-station communications fail or inter-station communications are absent, the slave station monitors changes of the direct current voltage of a system.