Influence of AC System Asymmetric Fault on the HVDC System Commutation Failure

LI Jiangtao; GU Yue; REN Ziyuan; CAO Hui; ZHENG Minjun; ZHAO Zheng; LI Tao; LI Zheng; WANG Lin

doi:10.13296/j.1001-1609.hva.2018.07.016

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Influence of AC System Asymmetric Fault on the HVDC System Commutation Failure

更新时间：2025-04-26

- Influence of AC System Asymmetric Fault on the HVDC System Commutation Failure
- High VoltageApparatus Vol. 54, Issue 7, Pages: 131-137(2018)
- 作者机构：
  
  1. 西安交通大学电气工程学院
  2. 华东电力设计院有限公司
  3. 中国电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.07.016
  CLC： TM721.1
- Published：2018
- 稿件说明：
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[1]李江涛,顾悦,任子媛,曹辉,郑敏军,赵政,李涛,李征,王琳.交流不对称故障类型对HVDC换相失败的影响研究[J].高压电器,2018,54(07):131-137.

LI Jiangtao, GU Yue, REN Ziyuan, et al. Influence of AC System Asymmetric Fault on the HVDC System Commutation Failure[J]. High voltageapparatus, 2018, 54(7): 131-137.
[1]李江涛,顾悦,任子媛,曹辉,郑敏军,赵政,李涛,李征,王琳.交流不对称故障类型对HVDC换相失败的影响研究[J].高压电器,2018,54(07):131-137. DOI： 10.13296/j.1001-1609.hva.2018.07.016.

LI Jiangtao, GU Yue, REN Ziyuan, et al. Influence of AC System Asymmetric Fault on the HVDC System Commutation Failure[J]. High voltageapparatus, 2018, 54(7): 131-137. DOI： 10.13296/j.1001-1609.hva.2018.07.016.

摘要

文中理论推导了交流电网单相短路接地、两相短路和两相短路接地这3种不对称故障类型下

针对不同换流变接线方式（Y-Y型和Y-D型）

故障特征量对直流换相过程的影响。基于向上±800kV直流输电工程PSCAD/EMTD电磁暂态仿真模型

仿真验证不对称故障类型对换流变Y桥和D桥换相失败影响的差异性。此外

还讨论了不对称故障类型对临界过渡电阻的影响规律

得到了不同故障下最易发生换相失败的换流变接线方式和导致换相失败的主要原因

对换相失败有一定的预测作用

并总结了这3种不对称故障类型对换相失败的影响程度。

Abstract

In this paper

a theoretical analysis of the influence of fault characteristic quantities on commutation pro-cess in HVDC system with different converter transformers（Y-Y type and Y-D type）is put forward

in the case ofAC system single-phase grounded

two-phases shorted or two-phases grounded. Based on the electro-magnetic tran-sient model of Xiang-Shang ±800kV HVDC system program-EMTP

we simulate and prove the different influence ofasymmetric fault types on Y-Bridge and D-Bridge of converter transformers. At the same time

the interference tothe critical transition resistances caused by types of asymmetric fault is discussed in detail. The bridge

which mostlikely to have commutation failure under different types of AC fault

and the main reason for commutation failure arealso discussed. Furthermore

we summarize the three types of asymmetry failure impact on commutation failure.

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