高压电器2013，Vol.49Issue(9)：28-34,7.
VSC-HVDC系统功率开关管故障特性分析与诊断
Power Switch Fault Characteristic Analysis and Diagnosis in VSC-HVDC
摘要
Abstract
Aiming at the open-circuit failure of power switch in voltage sourced converters high voltage direct current (VSC-HVDC) system,the operating characteristic of IGBT open-circuit failure is analyzed and the variation law of AC fault current is studied.The reason of power grid alternating current containing direct current component is proved when open-circuit fault occurs.A fault diagnosis method based on current characteristics is put forward.According to the value of slipping calculation near-zero current samples named as ‘zero sign' in a period,the fault phase is determined at first.The fault power switch is located based on the DC components of fault phase current being positive or negative.The results of simulation example show that the method presented in this paper can locate the faults in real time accurately and diagnosis results are not affected by transmitted power.关键词
VSC-HVDC/开路故障/故障特性/故障诊断Key words
VSC-HVDC/ open-circuit failure/ fault characteristic/ fault diagnosis分类
信息技术与安全科学引用本文复制引用
孙晓云,同向前..VSC-HVDC系统功率开关管故障特性分析与诊断[J].高压电器,2013,49(9):28-34,7.基金项目
陕西省教育厅科研计划(11JK1019) （11JK1019）
西安科技大学培育基金(201163) （201163）
Project Supported by Shaanxi Provincial Education Department (11JK1019),Development Fund of Xi'an University of Science and Technology(201163). （11JK1019）
