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:
Apr. 17, 2018
Filed:
Jan. 22, 2015
Nr Electric Co., Ltd., Nanjing, Jiangsu, CN;
Nr Electric Engineering Co., Ltd., Nanjing, Jiangsu, CN;
Ming Hu, Jiangsu, CN;
Zhenxia Shao, Jiangsu, CN;
Xinyan Jiao, Jiangsu, CN;
Jie Tian, Jiangsu, CN;
Yu Lu, Jiangsu, CN;
Gang Shen, Jiangsu, CN;
NR Electric Co., Ltd., Nanjing, Jiangsu, CN;
NR Electric Engineering Co., Ltd., Nanjing, Jiangsu, CN;
Abstract
A tripolar VSC-HVDC system and method include a rectifier and an inverter formed by a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively. The midpoint of upper and lower converter valves of the rectifier and inverter are connected with a poleDC line by a smoothing reactor. Triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the poleperiodically, and tripolar DC transmission is realized by modulating current orders of the three poles.