基于分布参数模型的直流输电线路故障测距方法  

Fault Location Method for HVDC Transmission Lines on the Basis of the Distributed Parameter Model

作　　者：高淑萍[1] 索南加乐[1] 宋国兵[1] 张健康[1] 焦在滨[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《中国电机工程学报》2010年第13期75-80,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50677051;50877061)~~

摘　　要：提出了一种新的、非行波原理的高压直流输电(high voltage directcurrent,HVDC)线路单端故障测距方法,该方法建立在分布参数模型基础上,利用单端电压电流量计算沿线电压、电流分布,根据计算得到的沿线电压分布和沿线电流分布求取过渡电阻的阻值,并根据故障点处过渡电阻值的方差最小进行故障定位。该定位方法在时域中进行,所需数据窗短,对采样频率要求不高,计算简单,定位精度高。仿真结果表明,该方法可以实现直流输电线路全线范围内的快速准确的故障定位。A novel fault location method using single terminal data is proposed. It＇s different from those based on the traveling wave theory. It can be applied to high voltage direct current （HVDC） transmission lines. Based on the distributed parameter model, the voltage and current distributions can be calculated using the voltage and current measured in the local terminal. According to the calculated distribution voltage and current over the line, transition resistor can be computed and the fault can be located according to the principle that the variance of the calculated transition resistor is minimum at the fault point. The algorithm, which is performed in time domain, needs a very short data window and can achieve satisfactory accuracy. Simulation results show that the fault of HVDC transmission lines can be located quickly and accurately with the proposed method.

关 键 词：高压直流输电线路 故障定位 分布参数:时域 单端电气量 

分 类 号：TM77[电气工程—电力系统及自动化]