配電網(wǎng)輸電線路故障定位的快速提取方法

葉榮波 徐濤

摘? ?要：為了快速鎖定配電網(wǎng)輸電線路故障發(fā)生的位置，針對配電網(wǎng)輸電線路的分布參數(shù)特性，提出了一種從配電網(wǎng)輸電線路暫態(tài)過程中提取準(zhǔn)確的電流和電壓基波的快速提取方法，并利用雙端非同步算法定位故障。仿真結(jié)果表明，與單周期傅立葉方法的結(jié)果相比，該方法具有良好的定位精度和穩(wěn)定性。該方法可以有效提高暫態(tài)過程中故障定位的精度，使定位結(jié)果誤差小于0.5%。

關(guān)鍵詞：配電網(wǎng);快速提取法;矩陣束;暫態(tài)過程;故障定位

中圖分類號：TM726.1? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?文獻(xiàn)標(biāo)識碼：A

Fast Extraction Method for Fault Location of Transmission Lines

in Distribution Network

YE Rong-bo1 XU Tao2

（1. China Electric Power Research Institute（Nanjing），Nanjing，Jiangsu 210003，China;

2. State Grid Ningxia Electric Power Company，Yinchuan，Jiangsu 750001，China）

Abstract： In order to quickly lock the location of transmission line fault in distribution network，in view of the distributed parameter characteristics of transmission lines in distribution network，this paper presents a fast method for extracting accurate current and voltage fundamental waves from the transient process of transmission lines in distribution network. Simulation results show that the proposed method has better positioning accuracy and stability than the single-period Fourier method. Therefore，this method can effectively improve the accuracy of fault location in transient process，so that the error of location results is less than 0.5%.

Key words：distribution network;fast extraction method;matrix pencil;transient process;fault location