Research on Anti-Interference Algorithm of Partial Discharge Signal of Switch Cabinet

doi:10.16628/j.cnki.2095-8188.2020.12.004

Abstract

Abstract:

Partial discharge detection of switchgear is one of the important means for analyzing its insulation performance.UHF detection has become the main method of partial discharge detection due to its good sensitivity and anti-interference ability.However,the periodic narrowband interference and square wave interference distributed in the UHF detection range can not be effectively suppressed.This paper analyzes the UHF partial discharge signal containing periodic narrowband interference and square wave interference,and proposes an anti-jamming algorithm based on cross-correlation function and waveform morphological parameters.The experimental results show that after the anti-jamming algorithm is calculated,the periodic narrowband interference and square wave interference are effectively filtered out,which proves that this method has a good anti-interference effect in UHF partial discharge detection.

Key words: switchgear, partial discharge, UHF, anti-interference, cross-correlation function, waveform morphological parameters

CLC Number:

TM591

HOU Chunguang, ZHANG Runqi, CAO Yundong, GAO Youhua. Research on Anti-Interference Algorithm of Partial Discharge Signal of Switch Cabinet[J]. LOW VOLTAGE APPARATUS, 2020, 0(12): 22-27.

Figures/Tables 14

References 12

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信号类型	波形形态参数C
方波干扰1	0.989 7
方波干扰2	0.979 4
周期性窄带干扰	0.198 1
放电信号	0.327 0