基于行波反演的输电线路单相接地故障重演方法  

Reproduction Method for Monophase-to-ground Fault of Transmission Lines Based on Wave Inversion

作　　者：梁涵卿[1] 刘亚东[1] 盛戈皞[1] 刘宗杰 江秀臣[1] LIANG Hanqing;LILT Yadong;SHENG Gehao;LIU Zongjie;JIANG Qiuchen(Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Jining Power Supply Company,State Grid Shandong Power Company,Jining 272000,China)

机构地区：[1]上海交通大学电气工程系,上海200240 [2]国网山东省电力公司济宁供电公司,济宁272000

出　　处：《高电压技术》2019年第1期209-217,共9页High Voltage Engineering

基　　金：国家自然科学基金(51307109)~~

摘　　要：重演输电线路的故障行波过程、定量地分析故障点的重要故障信息,对输电线路故障诊断有很大的现实意义。论文在分析单相接地故障初始电流行波及折反射行波的基础上,提出了基于行波反演的故障重演方法,从而实现对关键故障暂态信息的准确获取。该方法利用反演理论,结合线路依频参数模型,确定故障发生的时刻、故障点首个及第2个行波波头的模量电流幅值;构建了基于故障点模量电流幅值、故障角及故障电阻的数学模型;采用混沌粒子群优化(CPSO)算法,求解得到故障点的故障角及故障电阻值。PSCAD仿真结果表明,该方法可精确得到故障点的关键故障信息,其中故障电阻最大误差为2.64?,故障角最大误差为1.03°。论文所提方法可为输电线路故障分析提供参考。Reproducing fault traveling wave and quantitatively analyzing the fault information at fault points are of great practical significance to fault diagnosis of transmission lines. By analyzing the refraction and reflection waves of initial current of monophase-to-ground fault, we proposed a fault reproduction method based on wave inversion so as to accurately obtain the critical fault transient information. By combining a frequency-dependent parametric line model and wavelet transform with the inversion theory, the failure moment and the modulus current amplitude of the first and second wave head could be determined. The mathematical model of current amplitude, fault angle and fault resistance of fault point were constructed. Furthermore, the chaotic particle swarm optimization(CPSO) method was adopted to solve the value of fault angle and fault resistance. The simulation of PSCAD demonstrated that the method could obtain the critical information of fault point precisely. The maximum error of the fault resistance is 2.64Ω, and the maximum error of the fault angle is 1.03°. The proposed method can provide references for the fault analysis of transmission lines.

关 键 词：故障重演 反演 电流行波 故障信息 混沌粒子群 故障电阻 故障角 

分 类 号：TM862[电气工程—高电压与绝缘技术]