基于小波分析的电网电压行波故障定位系统  

Fault location system based on wavelet analysis for power grid voltage traveling wave

作　　者：吴焕杰 伍星宇 沈飞 孙世东 胡一凡 WU Huanjie;WU Xingyu;SHEN Fei;SUN Shidong;HU Yifan(Information Communication Branch of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]国网浙江省电力有限公司信息通信分公司,浙江杭州310000

出　　处：《电子设计工程》2024年第16期39-42,48,共5页Electronic Design Engineering

基　　金：浙江省自然科学基金项目(202098630025)。

摘　　要：电网电压行波故障定位系统的电压行波波头辨识错误率较高,故障定位距离结果与实际距离结果不一致,因此,提出基于小波分析的电网电压行波故障定位系统设计研究。设计一种传感电路获取电压行波信号,引入小波分析算法去除电压行波信号中的噪声,有效融合LSTM算法与ADF检验方法制定电压行波波头辨识方法,确定电压行波波头到达时刻,计算电网故障距离,实现电网电压行波故障定位。实验数据显示,设计系统获得的电压行波波头辨识错误率最小值为1%,该系统定位距离结果与实际结果一致,证实了其具备较佳的应用效果。The identification error rate of the voltage traveling wave head of the grid voltage traveling wave fault location system is high,and the fault location distance result is inconsistent with the actual distance result.Therefore,In order to ensure the security of power grid operation,the design and research of voltage traveling wave fault location system based on wavelet analysis is proposed.A sensing circuit is designed to obtain the voltage traveling wave signal,and wavelet analysis algorithm is introduced to remove the noise in the voltage traveling wave signal.LSTM algorithm and ADF inspection method are effectively integrated to develop the voltage traveling wave head identification method,determine the arrival time of the voltage traveling wave head,and calculate the fault distance of the power grid,realize the fault location of power grid voltage traveling wave.The experimental data shows that the minimum error rate of voltage traveling wave head identification obtained by the design system is 1%,and the positioning distance result of the system is consistent with the actual result,which proves that it has better application effect.

关 键 词：电网故障 小波分析 故障定位 电压行波 行波波头辨识 

分 类 号：TN108.4[电子电信—物理电子学]