Title :
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
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;
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
DOI :
10.1109/RTUCON.2014.6998201
