基于电磁时间反演改进算法的输电线路故障测距  

Transmission Line Fault Location Based on Improved Algorithm of Electromagnetic Time Reversal

作　　者：杨佳仪 刘青[1] 易小虎 高淑萍[1] 吴勇 YANG Jia-yi;LIU Qing;YI Xiao-hu;GAO Shu-ping;WU Yong(School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

机构地区：[1]西安科技大学电气与控制工程学院,西安710054

出　　处：《科学技术与工程》2022年第19期8363-8369,共7页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(51777166);国家自然科学基金联合基金重点支持项目(U1766209)。

摘　　要：针对目前利用电磁时间反演算法进行故障测距时反演过程需要事先知道故障类型以及利用解耦后的模量进行测距存在死区等问题,提出了一种基于电磁时间反演的改进故障测距算法。该算法无须解耦,能够根据非故障相导体的耦合信号实现故障定位,当故障相未知时,可以在反演模型中假定故障相,即使假定故障相与真实故障相不符,也可以根据假定故障相的耦合电流有效地实现故障定位,解决了输电线路故障相未知时故障定位的问题。首先理论分析了非故障相耦合信号用于电磁时间反演故障测距的可行性,之后利用ATP-EMTP软件搭建了750 kV架空输电线路模型进行仿真验证。仿真结果表明该算法不受故障类型和过渡电阻的影响,有较高的准确度。In order to solve the problems that the fault type needs to be known in advance when the electromagnetic time reversal algorithm is used for fault location in the reversal process,and there is a dead zone in the distance measurement using the decoupled modulus,an improved algorithm based on electromagnetic time reversal was proposed.The improved algorithm did not require decoupling,and could realize fault location based on the coupling signal of the non-faulty phase conductor.When the faulty phase was unknown,the faulty phase could be assumed in the reversal model.Even if the assumed faulty phase did not match the real fault,the fault location could be effectively realized according to the coupling current of the assumed faulty phase.The proposed method solved the problem of fault location when the fault phase of the transmission line was unknown.Firstly,it was theoretically analyzed the feasibility of using non-fault phase coupled signals for electromagnetic time reversal fault location,and then a 750 kV overhead transmission line model was established by ATP-EMTP to simulation verification.The simulation results show that the algorithm has high accuracy and is not affected by the fault types and the transition resistance.

关 键 词：电磁时间反演 故障测距 BLT超矩阵方程 耦合电流 过渡电阻 

分 类 号：TM721[电气工程—电力系统及自动化]