Mechanism analysis of DC bias increasing risk of commutation failure

Author

Wanting Deng ; Yayun Luo ; Jiangtao Quan ; Qianwen Guo ; Chongli Tong ; Fanrong Wei ; Zhicheng Wang ; Suyang Ding ; Youbin Zhou ; Zhengtian Li ; Xiangning Lin ; Jinwen Sun

Author_Institution

Wuhan Univ., Wuhan, China

fYear

2014

fDate

14-14 Oct. 2014

Firstpage

177

Lastpage

180

Abstract

The relation among DC bias, zero-crossing shifting resulting from voltage distortion and commutation failure is analyzed in this paper. It is pointed out that magnetizing current of converter transformer distorts when DC biasing, which not only may cause distortion of AC bus voltage, but increase risk of commutation failure. Based on PSCAD / EMTDC simulation software, China Southern Power Grid AC-DC Parallel Transmission System is established. By means of this model, the above hypothesis is verified with simulation tests. The correctness of theoretical analysis is proved with simulation results.

Keywords

HVDC power convertors; HVDC power transmission; commutation; distortion; failure analysis; power grids; power transformers; risk analysis; AC bus voltage distortion; China Southern power grid AC-DC parallel transmission system; DC bias mechanism analysis; PSCAD/EMTDC simulation software; UHVDC power transmission; commutation failure analysis; converter transformer; magnetizing current; simulation tests; zero-crossing shifting; Circuit faults; HVDC transmission; Integrated circuit modeling; Inverters; Nonlinear distortion; Power transmission lines; Valves; DC bias; UHVDC; commutation failure; ectromagnetic transient simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Electrical Engineering of Riga Technical University (RTUCON), 2014 55th International Scientific Conference on

Conference_Location

Riga

Print_ISBN

978-1-4799-7460-3

Type

conf

DOI

10.1109/RTUCON.2014.6998201

Filename

6998201