基于改进小波包分析的三相供电电源线路接地故障诊断方法  

Ground Fault Diagnosis Method of Three-Phase Power Supply Line Based on Improved Wavelet Packet Analysis

作　　者：肖晓 XIAO Xiao(Beijing CCTV Rui’an Technology Service Co.,Ltd.,Beijing 100038,China)

机构地区：[1]北京央视瑞安技术服务有限公司,北京100038

出　　处：《通信电源技术》2024年第23期131-133,共3页Telecom Power Technology

摘　　要：三相供电电源线路的接地故障信号复杂且易受干扰,这一特性在进行故障诊断时会降低诊断的灵敏度。因此,提出基于改进小波包分析的三相供电电源线路接地故障诊断方法。通过部署高精度传感器、模数转换、无线传输以及归一化处理措施,提升接地信号的质量。利用优化频带划分、融合快速傅里叶变换及隔点采样技术,提取接地故障信号特征。建立故障诊断模型,并辅以欧氏距离相似度匹配,实现接地故障的智能自动诊断。实验结果表明,设计方法能够提升诊断的灵敏度,确保在复杂的电力环境中实现故障的快速、准确识别。The grounding fault signal of three-phase power supply lines is complex and susceptible to interference,which reduces the sensitivity of fault diagnosis.Therefore,a fault diagnosis method of three-phase power supply line based on improved wavelet packet analysis is proposed.By deploying high-precision sensors,analog-to-digital conversion,wireless transmission and normalization measures,the quality of grounding signals is improved.By optimizing frequency band division,integrating fast Fourier transform and interval sampling techniques,the characteristics of grounding fault signals are extracted.The fault diagnosis model is established,supplemented by Euclidean distance similarity matching,intelligent automatic diagnosis of grounding faults is achieved.The experimental results show that the design method can improve the sensitivity of diagnosis and ensure fast and accurate identification of faults in complex power environments.

关 键 词：改进小波包分析 三相供电电源 接地故障 提取故障信号特征 自动诊断 

分 类 号：TM862[电气工程—高电压与绝缘技术]