电力系统自动化2017，Vol.41Issue(15)：155-161,7.DOI:10.7500/AEPS20161115002
混压同塔四回线强电弱磁系统跨电压不接地故障短路计算
Short-circuit Calculation of Cross-voltage Unearthed Fault in Strong-electric and Weak-magnetic System of Mixed-voltage Four-circuit Lines on the Same Tower
摘要
Abstract
At present,the twelve sequence fault component theory is mainly used for four-circuit transmission lines on same tower.However,the calculation is much too complicated because of the high matrix order.Moreover,it is only suitable for parameter symmetric lines.A new method based on the classical symmetrical component method is proposed.First,the strong-electric and weak-magnetic system of mixed-voltage four-circuit lines on the same tower is divided into two parts: the strong-electric equivalent current source system and weak-electric strong-magnetic system.Secondly,the short circuit current provided by the two parts of power supply are calculated respectively.Finally,the two parts of fault current are superposed as the fault current of strong-electric and weak-magnetic systems.Thus complicated calculation of high-order matrix with clear physical concept is avoided while accurate calculation of unearthed fault can be made.The correctness of the method is verified by simulation results via PSCAD/EMTDC.关键词
强电弱磁/跨电压故障/混压同塔四回线/等效电流源/故障电流Key words
strong-electric and weak-magnetic/cross-voltage fault/mixed-voltage four-circuit lines on the same tower/equivalent current source/fault current引用本文复制引用
郑涛,吴丹,张嘉琴,黄少锋,王小立..混压同塔四回线强电弱磁系统跨电压不接地故障短路计算[J].电力系统自动化,2017,41(15):155-161,7.基金项目
国家重点研发计划智能电网技术与装备重点专项项目(2016YFB0900604).This work is supported by Key Project of Smart Grid Technology and Equipment of National Key Research and Development Program of China (No.2016YFB0900604). （2016YFB0900604）
