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基于自适应递推滤波的高压输电线路行波故障定位方法 被引量:10

Traveling Wave Fault Location Method for High-Voltage Transmission Lines Based on Adaptive Recursive Filtering Algorithm
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摘要 针对传统高压输电线路测距精度差且行波法易受噪声因素影响等问题,提出了一种基于自适应递推滤波算法的高压输电线路行波故障定位方法。该方法首先经高通滤波处理后采集电流行波信号,粗定行波波头位置,选取故障前数据估计噪声的分布参数;然后基于噪声分布参数构建自适应递推滤波器对信号进行滤波;最后结合滤波后的信号与噪声参数进行比较,实现波头标定。在此基础上,结合双端测距原理实现故障点定位。仿真分析表明,所提出的方法在不同的故障条件下均可准确检测出行波信号;在弱行波信号含噪情况下,相比于小波变换,自适应递推滤波算法能有效提高输电线路故障行波定位的准确性。 The traditional high-voltage transmission lines have poor fault location accuracy and the traveling wave method is easy to be affected by noise.In order to solve the above problems,this paper proposes a traveling wave fault location method based on adaptive recursive filtering algorithm.Firstly,the algorithm is used to sample current traveling wave signals after high-pass filtering,roughly determine the position of traveling wave head,and select pre-fault data to estimate noise distribution parameters.Then an adaptive recursive filter is constructed based on the noise distribution parameters to filter the signal.Finally,the wave head calibration is realized by comparing the filtered signal with the noise parameters,and on this basis,the fault location is realized by combining the principle of two-terminal distance measurement.Simulation results show that the proposed method can detect traveling wave signal accurately under different fault conditions,and that compared with wavelet transform,the adaptive recursive filtering algorithm can effectively improve the accuracy of transmission line fault traveling wave location in the case of weak traveling wave signal with noise.
作者 张杰 陈玉林 黄涛 谢华 徐晓春 ZHANG Jie;CHEN Yulin;HUANG Tao;XIE Hua;XU Xiaochun(NR Electric Co.,Ltd.,Nanjing Jiangsu 211100,China)
出处 《湖北电力》 2023年第1期52-59,共8页 Hubei Electric Power
基金 国家重点研发计划项目(项目编号:2021YFB2400805)。
关键词 高压输电线路 自适应递推滤波 行波波头 故障测距 噪声干扰 high-voltage transmission line adaptive recursive filtering traveling wave head fault location noise jamming
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