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:
Jun. 30, 2020
Filed:
Jan. 19, 2017
Nr Electric Co., Ltd., Jiangsu, CN;
Nr Engineering Co., Ltd., Jiangning, Nanjing, CN;
Wenqiang Zhao, Jiangsu, CN;
Nannan Wang, Jiangsu, CN;
Yongping Wang, Jiangsu, CN;
Jiang Lu, Jiangsu, CN;
Chuanjun Bai, Jiangsu, CN;
Yu Lu, Jiangsu, CN;
NR ELECTRIC CO., LTD, Nanjing, Jiangsu, CN;
NR ENGINEERING CO., LTD, Nanjing, Jiangsu, CN;
Abstract
A method and apparatus for controlling a hybrid direct-current (DC) transmission system. The method comprises: adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to a DC voltage of a rectifier station at other end; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to the magnitude of a DC current or DC power; or adjusting the total number of inserted sub-modules of a modular multi-level converter and the polarity of an output level of the inserted sub-modules in real time, according to both the magnitude of the DC current and the DC voltage of the rectifier station at the other end. The method can effectively control the DC voltage and the direct current of a hybrid DC transmission system, avoiding the power transmitting breakdown.