电器与能效管理技术Issue(5)：1-8,8.DOI:10.16628/j.cnki.2095-8188.2025.05.001
低压直流微电网短路故障早期检测方法研究
Research on Early Detection Methods of Short-Circuit Fault in Low Voltage DC Microgrid
摘要
Abstract
In order to further improve the sensitivity and reliability of short-circuit fault detection in low voltage DC microgrids,a short-circuit fault early detection method based on voltage and current multi-scale wavelet transform is proposed.Based on the least squares front filtering,fully considering the voltage and current short-circuit fault singularity,the fourth layer wavelet decomposition detail components are used to construct the short-circuit fault early detection criterion.The experimental results show that the proposed detection method is insensitive to the transition resistance.The short-circuit faults can be quickly detected within 0.5 ms when the transition resistance is small.The short-circuit faults can be reliably detected within 0.6 ms when the transition resistance is large.At the same time,it can effectively avoid the influence of disturbing conditions such as frequent load switching,and has better sensitivity and reliability.关键词
低压直流微电网/短路故障/早期检测/小波变换/最小二乘拟合Key words
low voltage DC microgrid/short-circuit fault/early detection/wavelet transform/least squares fitting分类
信息技术与安全科学引用本文复制引用
刘启彤,缪希仁..低压直流微电网短路故障早期检测方法研究[J].电器与能效管理技术,2025,(5):1-8,8.基金项目
高校产学合作项目(2023H6006) （2023H6006）
