摘要
文章分析了柔性直流输电系统换流站IGBT开路故障的电流响应与故障特征,并采用直接平均电流法、平均电流Park矢量法和归一化直流分量法对其进行检测。在PSCAD/EMTDC中搭建了三端柔性直流输电系统仿真模型,对3种开路检测方法在不同运行模式和运行工况下的检测性能进行了对比。仿真结果表明,利用换流站交流侧电流中的直流分量作为故障特征,能够在1~2个周波内检测到换流站IGBT开路故障位置;归一化直流分量法在低功率条件下更灵敏,在功率调整、直流电压调整和潮流反转时具有更好的动态检测性能。
In order to detect IGBT open-circuit fault in voltage source converter based multi-terminal high voltage direct current(VSC-MTDC) system, this paper theoretically analyzes the current response characteristics and fault features of the IGBT open-circuit fault. Direct average current method, Park’s vector method and normalized dc component method are used to detect IGBT open-circuit fault. A simulation model of the three-terminal VSC-MTDC system is established in PSCAD/EMTDC. The performance of the three methods under different operational modes and conditions are compared. Results show that the DC component in AC current of VSC station can be used as an effective feature to detect and locate the IGBT open-circuit fault in 1~2 fundamental cycles. The normalized DC component method is more sensitive under low power conditions, which also shows a better dynamic detection performance under power adjustment, DC voltage adjustment and power flow reversal.
作者
李豪
赵孟
董志文
杨兴武
Li Hao;Zhao Meng;Dong Zhiwen;Yang Xingwu(College of Electrical Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China;State Grid Shanghai Electric Power Company Jiading Power Supply Company,Shanghai 201801,China)
出处
《可再生能源》
CAS
北大核心
2019年第12期1802-1808,共7页
Renewable Energy Resources
基金
国家自然科学基金项目（51907116）
上海市“科技创新行动计划”（19DZ1205400）
上海市青年科技英才扬帆计划项目（18YF1408900）
