考虑换相失败相互影响的多馈入高压直流系统换相失败判断方法

doi:10.19595/j.cnki.1000-6753.tces.190143

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摘要在多馈入高压直流系统（MIDC）中,逆变站换相失败的相互影响是引发换相失败传递的重要因素。该文详细分析逆变站换相失败期间的暂态特性,并根据开关函数模型及动态相量理论推导直流系统向交流系统注入的换相失败分量;进而研究在交流系统故障及换相失败双重影响下各逆变站换相电压的解析计算方法;在此基础上,通过对比各换流阀的最大换相面积与其关断所需的最小换相面积,提出针对多馈入高压直流系统的换相失败判断分析方法;最后,通过所建多馈入高压直流系统模型的仿真结果,验证了该文方法的有效性。

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	许汉平
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	苗世洪
	王怡聪

关键词 ：多馈入高压直流系统, 相互影响, 换相失败, 开关函数, 换相面积

Abstract：In the multi-infeed high-voltage DC system (MIDC), the interaction among inverter stations is an important factor that triggers the propagation of commutation failure. In this paper, the transient characteristics of inverter station during commutation failure are analyzed in detail, and the commutation failure component is derived by the switching function model and the dynamic phasor theory. Then, the analytical calculation method is studied to reflect the commutation voltage of each inverter station, considering the mutual influence of AC system fault and commutation failure. On this basis, by comparing the maximum commutation area of each converter valve with the minimum commutation area required for turning off, a commutation failure judgement method is proposed. Finally, the simulation results verify the proposed method.

Key words： Multi-infeed high-voltage DC system mutual influence commutation failure switching function commutation area

收稿日期: 2019-02-03 出版日期: 2020-04-24

PACS:

TM721

基金资助:国网湖北省电力有限公司经济技术研究院科技资助项目（SGHBJY00JHJS1800026）

通讯作者: 杨炜晨男,1995年生,博士研究生,研究方向为直流输电运行与控制。E-mail: yangwc@hust.edu.cn

作者简介: 许汉平男,1969年生,硕士,研究方向为电力系统运行及控制。E-mail: xuhping@sina.com

引用本文:

许汉平, 杨炜晨, 张东寅, 苗世洪, 王怡聪. 考虑换相失败相互影响的多馈入高压直流系统换相失败判断方法[J]. 电工技术学报, 2020, 35(8): 1776-1786. Xu Hanping, Yang Weichen, Zhang Dongyin, Miao Shihong, Wang Yicong. Commutation Failure Judgment Method for Multi-Infeed HVDC Systems Considering the Interaction of Commutation Failures. Transactions of China Electrotechnical Society, 2020, 35(8): 1776-1786.

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