电力工程技术2025，Vol.44Issue(6)：183-192,10.DOI:10.12158/j.2096-3203.2025.06.018
基于插值小波系数法的局部放电亚纳秒脉冲辐射源定位
Localization of sub-nanosecond pulse radiation sources of partial discharge based on interpolation wavelet coefficient method
摘要
Abstract
The ultra-high frequency(UHF)radiation source localization method for electrical equipment is a key technology for partial discharge(PD)localization.PD signals exhibit wide frequency bands(300 MHz-3 GHz),rapid rising edges(the shortest rise time reaching sub-nanoseconds or even hundreds of picoseconds),which are always accompanied by significant background noise.These characteristics impose stringent requirements on the sampling frequency and analog bandwidth of measurement systems.Conventional measurement systems struggle to effectively capture and completely record the rapid rising edge waveforms of PD pulse signals.To solve these problems,a radiation source localization method based on interpolation calculation and multi-scale wavelet transform is proposed.This method enables effective detection of rapid rising pulse signal arrival times under lower sampling rates.Interpolation is applied to the pulse signal,followed by multi-scale wavelet transform on the interpolated signal.The maximum wavelet coefficient is extracted to replace the original pulse signal.Based on the maximum wavelet coefficient,the energy accumulation algorithm is used to calculate the signal's arrival time.Simulation analyses and experimental validations demonstrate that this method significantly improves the temporal resolution of UHF pulse signals and exhibits robust noise resistance in high-noise electromagnetic environments.关键词
局部放电/插值计算/多尺度小波变换/脉冲信号提取/波头识别/辐射源定位Key words
partial discharge/interpolation calculation/multi-scale wavelet transform/pulse signal extraction/wavefront recognition/radiation source localization分类
信息技术与安全科学引用本文复制引用
宋梁,和少寅,张博皓,陈翔宇,谢彦召..基于插值小波系数法的局部放电亚纳秒脉冲辐射源定位[J].电力工程技术,2025,44(6):183-192,10.基金项目
陕西省重点研发计划资助项目(2023-YBGY-064) （2023-YBGY-064）
