抗行波波速干扰的高压输电线路故障自动选线方法  

Automatic Line Selection Method for High-Voltage Transmission Line Fault Against Traveling Wave Speed Interference

作　　者：王静瑞 WANG Jingrui(Ningxia Power Transmission and Transformation Engineering Co.,Ltd.,Yinchuan,Ningxia 750001,China)

机构地区：[1]宁夏送变电工程有限公司,宁夏银川750001

出　　处：《自动化应用》2023年第20期75-77,86,共4页Automation Application

摘　　要：传统的故障选线方法为在弱电侧使用电压突变选线,虽然灵敏度高,但强电侧灵敏度不足,故障识别准确性较低,因此,本文提出了一种抗行波波速干扰的高压输电线路故障自动选线方法。该方法首先提取故障传播信号特征,产生一个向线路两端移动的电流行波与电压,使故障信号传播速度接近电磁波速度;然后定位故障线路,利用由量化关系得到的波峰至两个测点处的波峰速度差异确定故障点,从而提高线路故障点的定位精度;最后,在高压输电线路上自动选择有故障的线路。实验结果表明,该方法检测的故障位置长度与实验设置的故障位置长度相近,最长误差距离不超过0.2km。与传统方法1和传统方法2相比,该方法检测的误差长度更短,最长误差距离分别为1.3km和1.5km,证明该方法具有很高的可行性。The traditional fault line selection method uses voltage mutation on the weak current side,although it has high sensitivity,it is insufficient on the strong current side,resulting in low accuracy of fault identification.Therefore,a method for automatic fault line selection of high-voltage transmission lines with resistance to traveling wave velocity interference is proposed by this paper.This method first extracts the characteristics of fault propagation signals and generates a current traveling wave and voltage moving towards both ends of the line,making the propagation speed of the fault signal close to the speed of electromagnetic waves.Then locate the faulty line and determine the fault point using the difference in peak velocity between the two measurement points obtained from the quantification relationship,thereby improving the positioning accuracy of the fault point on the line.Finally,automatic selection of faulty lines is achieved on high-voltage transmission lines.The experimental results show that the length of the fault location detected by this method is similar to the length of the fault location set in the experiment,and the maximum error distance does not exceed 0.2 km.Compared to traditional methods 1 and 2,this method detects shorter error lengths,with maximum error distances of 1.3 km and 1.5 km,respectively,proving its high feasibility.

关 键 词：高压输电线 故障 波速干扰 抗行波 

分 类 号：D26.4[政治法律—政治学]