适于多分支输电线路的故障支路判别算法  

Fault Section Discrimination Algorithm for Transmission Line with Multi-tapped Legs

作　　者：顾伟[1] 王波[1] 

机构地区：[1]浙江宁波电业局,宁波315000

出　　处：《电力系统及其自动化学报》2012年第3期127-133,共7页Proceedings of the CSU-EPSA

摘　　要：考虑输电线路出现多条分支的情况,文中提出一种适于多分支输电线路的故障支路判别算法,该算法仅采用线路两端的电流、电压测量值,利用故障附加分量建立一种故障计算指标;通过该计算指标与线路分支节点的比较,能有效判定故障所在区域范围,进而构建了一种故障支路判别算法。该算法能实现任意分支线路的故障支路判定,解决了传统双端测距原理的通用性问题。大量的PSCAD仿真结果验证了该算法的有效性,同时该算法不受故障类型、过渡电阻等因素影响。Considering the situation that the transmission line may be tapped with legs, a fault section discrimi- nation algorithm for the transmission line with multi-tapped legs is presented in this paper. By using the meas- ured voltage and current at two terminals, a fault section discrimination index is established by obtaining the additional fault component. Through the comparison of the calculated index and line branch node, the suspec- ted fault area can be effectively located. Then a fault section discrimination algorithm is proposed, which can discriminate the fault section with any legs and solve the generality of the two-terminal fault location method. Extensive PSCAD simulations have been performed. The results verify the validity of the algorithm and the proposed algorithm is independent of fault type, fault resistance, etc.

关 键 词：传输线路 叠加原理 故障测距 相量测量单元 

分 类 号：TM713[电气工程—电力系统及自动化]