摘要
对换相电压时间面积判据进行了改进,在判断换相失败时考虑到直流电流的波动,得到改进换相面积判据,该判据的推导过程更接近工程实际。在仿真软件PSCAD/EMTDC下搭建了±800 kV传统直流输电仿真系统LCC-HVDC。分别采用改进前后的换相面积作为换相失败的判据,搭建了换相失败的判断程序并用于判断LCC-HVDC仿真系统中由于交流侧故障导致的换相失败。仿真结果表明,改进换相面积判据可以更加准确地判断换相失败。最后,根据仿真结果,进一步分析了故障时刻对换相失败的影响。
Commutation voltage-time area judgment is improved in order to take direct current into consideration and improved commutation area judgment is obtained. ＋ 800kV LCC-HVDC simulation system is built under PSCAD/EMT- DC, as well as commutation failure judging program based on improved and unimproved commutation area judgment. Commutation failure judging program is applied to detect commutation failure in LCC-HVDC simulation system, which is caused by AC system fault. Simulation result shows that improved commutation area judgment, compared with unim- proved one, judges commutation failure more accurate. Besides, effect of fault time on commutation failure is also ana- lyzed in this paper.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2014年第1期15-21,共7页
Journal of North China Electric Power University：Natural Science Edition
基金
国家电网公司大电网重大专项资助项目(SGCC-MPLG004-2012)
