基于全息希尔伯特频谱分析的交流串联电弧故障电流特征研究*

doi:10.16628/j.cnki.2095-8188.2024.06.002

摘要/Abstract

摘要：

针对交流串联电弧故障信号特征提取和分析的难题,提出采用循环掩码经验模态分解(itEMD)进行信号分解以获取多层内涵模态分量(IMF),结合全息希尔伯特变换(HHT)展现高维幅度调制-频率调制(AM-FM)谱图的分析方法,从而获取高区分度的电弧故障信号特征谱图。采用基于 GB/T 31143—2014的电弧故障实验平台,采集7种屏蔽负载模式下电弧故障电流信号,分析研究不同环境下电弧故障特征。所提方法对于电弧故障检测技术的开发具有一定的理论指导意义。

关键词: 交流电弧, 串联电弧故障, 全息希尔伯特频谱分析, 循环掩码经验模态分解

Abstract:

To solve the problem of extraction and analysis of alternative-current series arc fault characteristics, an analysis methodology that applies iterated masking empirical mode decomposition (itEMD) for current signal decomposition to obtain multi-layer intrinsic mode functions (IMFs) is proposed, and Holo-Hilbert transform(HHT) is utilized to represent high-dimensional amplitude-modulation-and-frequency-modulation (AM-FM) spectra, so that the high discriminative characteristic spectra of series arc faults can be achieved. The arc fault current signals are acquired under seven masking load modes in accordance with GB/T 31143—2014, and arc fault characteristics under different conditions are investigated by the proposed methodology. The presented study is of significant theoretical importance to the development of arc fault detection techniques.

Key words: alternative-current arcs, series arc faults, Holo-Hilbert spectral analysis, iterated masking empirical mode decomposition

中图分类号:

TM501.2

吴自然, 韩燕, 陈冲. 基于全息希尔伯特频谱分析的交流串联电弧故障电流特征研究^*[J]. 电器与能效管理技术, 2024, 0(6): 8-16.

WU Ziran, HAN Yan, CHEN Chong. Research on Characteristics of AC Series Fault Arcs Based on Holo-Hilbert Spectral Analysis[J]. LOW VOLTAGE APPARATUS, 2024, 0(6): 8-16.

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参考文献 20

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负载	类别	参数
卤素灯	阻性	300 W
荧光灯	阻性	80 W
电子式开关电源	容性	最小总谐波畸变率为100%, 单独3次谐波最小畸变率75%
空压机	容性	2 200 W
电子灯光调节器	感性	600 W,60°导通角
真空吸尘器	感性	1 200 W
电钻	感性	800 W

负载类型	幅度峰值对应频率	正常状态波动范围	故障状态波动范围
纯电阻	f_FM (ω,Hz)	43.092~2 489.677	400.853~1 459.940
纯电阻	f_AM (Ω,Hz)	151.860~917.681	610.776~766.597
荧光灯加5 A电阻	f_FM (ω,Hz)	40.853~2 922.036	500.576~1 459.940
荧光灯加5 A电阻	f_AM (Ω,Hz)	43.109~766.597	510.605~917.681
真空吸尘器	f_FM (ω,Hz)	118.806~856.105	730.487~1 243.920
真空吸尘器	f_AM (Ω,Hz)	88.525~766.597	510.605~534.955
电容器启动电动机	f_FM (ω,Hz)	125.319~364.447	66.046~729.431
电容器启动电动机	f_AM (Ω,Hz)	36.012~766.597	610.776~640.386
电子式开关电源	f_FM (ω,Hz)	86.249~405.504	400.853~655.576
电子式开关电源	f_AM (Ω,Hz)	73.951~260.506	36.012~766.597