李猛克,王阳,孙广,张海龙,冯晓伟,王新伟.基于回归分析法的特高压直流接地极线路故障测距方法研究[J].电测与仪表,2021,58(9):129-134. Li Mengke,Wang Yang,Sun Guang,Zhang Hailong,Feng Xiaowei,Wang Xinwei.Research on Fault Location Method of UHVDC Grounding Electrode Line Based on Regression Analysis[J].Electrical Measurement & Instrumentation,2021,58(9):129-134.
基于回归分析法的特高压直流接地极线路故障测距方法研究
Research on Fault Location Method of UHVDC Grounding Electrode Line Based on Regression Analysis
Accurate fault location of grounding pole in UHVDC project is helpful to improve the efficiency of fault detection, and has important practical significance to ensure the normal operation of grounding pole and HVDC transmission system. In this paper, a fault location method for grounding pole line of UHVDC transmission project based on regression analysis is proposed. Firstly, the variation characteristics of electrical quantity of grounding pole line with different types of faults are analyzed, and the causes of transient overvoltage are studied. Based on the DC value of steady-state voltage and current after fault, the solution method of transition resistance is given. The relationship model between fault location and transient overvoltage under different transition resistance is established by regression analysis method, and the fault location under different transition resistance is realized. The simulation results of Zhalute-Qingzhou ±800kV grounding electrode system show that the proposed method has high fault location accuracy and good applicability for different fault transition resistors.
