基于脉冲电流法的高压开关柜局部放电在线监测系统设计  

Design of On-line Partial Discharge Monitoring System for High Voltage Switchgear Based on Pulse Current Method

作　　者：李钊枢 林宪峰 佘佳玺 许超 LI Zhaoshu;LIN Xianfeng;SHE Jiaxi;XU Chao(Heihe Power Supply Company of State Grid Heilongjiang Electric Power Co.,Ltd.,Heihe 164399,China;Electric Power Research Institute,State Grid Heilongjiang Electric Power Co.,Ltd.,Harbin 150030,China)

机构地区：[1]国网黑龙江省电力有限公司,黑河供电公司,黑龙江黑河164399 [2]国网黑龙江省电力有限公司,电力科学研究院,黑龙江哈尔滨150030

出　　处：《微型电脑应用》2023年第11期43-47,共5页Microcomputer Applications

基　　金：国网黑龙江省电力有限公司黑河供电公司科技资助项目(5224202000Y7)。

摘　　要：为了监测高压开关柜局部放电状态是否属于故障状态,设计基于脉冲电流法的高压开关柜局部放电在线监测系统。超高频传感器模块采集高压开关柜运行状态的超高频信号,发现高压开关柜存在局部放电状态后,驱动脉冲电流信息检测模块采集开关柜放电信号,并通过基于2代小波去噪的高压开关柜局部放电信号去噪方法,将局部放电信号进行去噪后导入DSP模块,DSP模块使用基于最优二元树复小波分解的放电信号特征提取方法,提取最优二元树复小波分解的放电信号特征,再启动基于神经网络与证据理论的局部放电特征融合识别模型,判断识别局部放电是否属于故障放电。经测试,此系统可有效监测高压开关柜局部放电状态,具有应用价值。In order to monitor whether the partial discharge state of high voltage switchgear belongs to fault state,an on-line partial discharge monitoring system of high voltage switchgear based on pulse current method is designed.The UHF sensor module collects the UHF signal of the operation state of the high-voltage switchgear.After finding that the high-voltage switchgear has a partial discharge state,the pulse current information detection module is driven to collect the discharge signal of the switchgear,and the partial discharge signal is denoised and introduced into the DSP module through the partial discharge signal denoising method of the high-voltage switchgear based on the second generation wavelet denoising.The DSP module uses the discharge signal feature extraction method based on the optimal binary tree complex wavelet decomposition to extract the discharge signal features of the optimal binary tree complex wavelet decomposition,and then starts the partial discharge feature fusion recognition model based on neural network and evidence theory to judge whether the identified partial discharge belongs to fault discharge.After testing,the system can effectively monitor the partial discharge state of high voltage switchgear,and is of application value.

关 键 词：脉冲电流法 高压开关柜 局部放电 在线检测系统 特征融合识别 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]