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:
Oct. 17, 2023
Filed:
Oct. 20, 2020
Beijing Jiaotong University, Beijing, CN;
Jinghan He, Beijing, CN;
Meng Li, Beijing, CN;
Yiping Luo, Beijing, CN;
Xiaojun Wang, Beijing, CN;
Yin Xu, Beijing, CN;
Dahai Zhang, Beijing, CN;
Guomin Luo, Beijing, CN;
Fang Zhang, Beijing, CN;
Xiangyu Wu, Beijing, CN;
Pinghao Ni, Beijing, CN;
Ying Wang, Beijing, CN;
BEIJING JIAOTONG UNIVERSITY, Beijing, CN;
Abstract
A method for calculating the steady-state fault current of a modular multilevel converter (MMC) comprises calculating the dc-side critical resistance values R, Rand Rof the MMC based on the bridge arm inductance coefficient k and the ac-side reactance Xof the MMC; Then, determining the operating modes of the MMC based on R, Rand R, and calculating the steady-state dc fault current and the conduction overlap angle respectively under various operating modes without considering the ac-side resistance based on the parameters k, U, Rand the dc-side critical resistance values R, Rand R; After that the steady-state AC fault current amplitude and phase angle for each operating mode without considering the AC side resistance are calculated based on the DC current and conduction overlap angle for each operating mode, respectively. Finally, the steady-state AC fault current amplitude and phase angle are calculated for various operating modes considering the AC side resistance.