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:
Sep. 16, 2025
Filed:
Sep. 26, 2022
State Grid Chongqing Electric Power Co. Electric Power Research Institute, Chongqing, CN;
State Grid Corporation of China, Beijing, CN;
Hui Fang, Chongqing, CN;
Jingsen Zhou, Chongqing, CN;
Yongtao Chen, Chongqing, CN;
Fan Mu, Chongqing, CN;
Shengyi Zhu, Chongqing, CN;
Cheng Wang, Jiangsu, CN;
Lei Li, Jiangsu, CN;
Hongji Xiang, Chongqing, CN;
Yanan Yu, Chongqing, CN;
Qiang Xiao, Chongqing, CN;
Lining Hu, Chongqing, CN;
Zhongyi Wen, Chongqing, CN;
State Grid Chongqing Electric Power Co. Electric Power Research Institute, Chongqing, CN;
State Grid Corporation of China, Beijing, CN;
Abstract
A modulation method for a direct current (DC) coupling converter with less DC voltage sensors includes: obtaining a voltage modulated wave v* and a current reference value i* of the DC coupling converter; performing determination on the voltage modulated wave v* and the current reference value i*, and determining a switch state of the DC coupling converter based on a result of the determination; and when a DC voltage sensor of an electrolytic capacitor of an intermediate power module is removed, modulating a DC voltage sensor based on the voltage modulated wave v* and a difference between DC voltages on electrolytic capacitors of the other two power modules. When the intermediate DC-side voltage sensor is removed, DC voltages of various modules of a converter system of a DC coupling power unit can still be balanced, and quality of a grid-connected current is not affected by a fault.