LI Xiangfei 1, ZOU Lihua 2, ZHANG Taishan 1. DETECTION OF THE PARTIAL DISCHARGE PULSE IN POWER TRANSFORMER BASED ON CONTINUOUS WAVELET TRANSFORMATION[J]. High voltageapparatus, 2001, (3): 33-35.
LI Xiangfei 1, ZOU Lihua 2, ZHANG Taishan 1. DETECTION OF THE PARTIAL DISCHARGE PULSE IN POWER TRANSFORMER BASED ON CONTINUOUS WAVELET TRANSFORMATION[J]. High voltageapparatus, 2001, (3): 33-35.DOI:
基于连续小波变换的电力变压器局放信号检测
摘要
本文采用了不同小波函数及不同尺度参数对含强载波干扰的局部放电信号进行连续小波变换
并对小波变换结果进行了定量对比分析。仿真结果表明
在采样频率一定的情况下
不同的小波函数只有在各自的最佳尺度参数下对干扰的抑制能力才是最强的
因此
只有选取合适的小波函数及其最佳尺度参数才能更加有效地抑制周期载波干扰。
Abstract
This paper introduces a continuous wavelet transformation for detecting the disturbed partial discharge pulse in power transformer by using different wavelet functions and scale parameters and analyses the result of wavelet transformation. The result of emulation shows that different wavelet function has different optimal scale parameter. Therefore
optimal wavelet function and scale parameter shall be choosed carefully in order to detect the partial discharge.