Phase Offset Characteristics of Commutation Voltage for HVDC with Single-phase Grounding Fault

被引：0
|
作者：
Huang M. [1 ]
Fu C. [2 ]
Wang J. [3 ]
Yang J. [2 ]
Li H. [2 ]
Wen Z. [3 ]
机构：
[1] Guangdong Electric Power Research Institute Energy Technology Co., Ltd., Guangzhou
[2] State Key Laboratory of HVDC, Electric Power Research Institute of China Southern Power Grid, Guangzhou
[3] School of Electric Power, South China University of Technology, Guangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Commutation failure; Commutation voltage offset; Grounding impedance; High voltage direct current; Single-phase grounding fault;
D O I：
10.7500/AEPS20191021009
中图分类号：
学科分类号：
摘要：
Asymmetrical faults on the inverter side of the high voltage direct current (HVDC) transmission system will lead to the phase offset of commutation voltage of converter valve, which will cause commutation failures and seriously affect the stable operation of the system. So it is necessary to study the phase offset characteristics of commutation voltage under asymmetric faults. Based on the transient analysis method of the power system, the positive-, negative- and zero-sequence decompositions of the HVDC transmission system under asymmetric faults are carried out, and the calculation formulas for the amplitude and phase of the three-phase voltage on the valve side of the converter transformers for YNy0 and YNd1 wiring are derived, and the maximum deviation of the commutation voltage of the 12-pulsation converter valve under an asymmetric fault is obtained. In addition, the amplitude of the AC bus voltage on the grid side of the converter is calculated, based on MATLAB simulation software, the characteristic variation of commutation voltage offset of converter valve with different types of ground fault impedance are analyzed. The PSCAD/EMTDC electromagnetic transient simulation results prove the correctness of the influence characteristics of commutation voltage offset analyzed in this paper. © 2020 Automation of Electric Power Systems Press.
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页码：162 / 168
页数：6
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