基于小波分析的水电站馈线故障快速检测算法研究
Research of wavelet analysis in hydropower station feeder fault quick detection algorithm
万浩平1
作者信息
- 1. 江西省水利科学院,江西南昌 330029;江西省鄱阳湖流域生态水利技术创新中心,江西南昌 330029
- 折叠
摘要
针对水电站馈线微机继电保护装置常用采样算法时间偏长的现状,以及现代化继保装置对于切断故障的时效性要求越趋严格,提出了一种基于Symlets5小波的馈线微机保护算法.通过研究分析Symlets5小波分解重构后的故障信号高频分量波形模极大值,发现Symlets5小波算法最快能够在故障发生后在2/n～5/n周期内判定短路故障的发生,并计算出故障后信号幅值.Symlets5小波算法可作为保护算法启动的判据或者与其他算法配合使用,可大大提高馈线保护装置切断故障线路的时效性,保护水电站馈线运行安全.
Abstract
A feeder microcomputer protection algorithm based on Symlets5 wavelet is proposed to address the current situation of long sampling algorithm time in commonly used microcomputer relay protection devices for hydropower station feeders,as well as the increasingly strict timeliness requirements for cutting off faults in modern relay protection devices.Through studying and analyzing the maximum modulus of the high-frequency component waveform of the fault signal reconstructed by Symlets5 wavelet decomposition,it is found that the Symlets5 wavelet algorithm can quickly determine the occurrence of short-circuit faults within 2/n～5/n cycles after the fault occurs,and calculate the amplitude of the signal after the fault occurs.The Symlets5 wavelet algorithm can be used as a criterion for initiating protection algorithms or used in conjunction with other algorithms,which can greatly improve the timeliness of feeder protection devices in cutting off faulty lines,and protect the safety of hydro-power station feeder lines.
关键词
继电保护/Symlets5小波算法/仿真/模极大值/幅值/相位Key words
relay protection/Symlets5 wavelet algorithm/simulation/maximum modulus/amplitude/phase引用本文复制引用
出版年
2025
NETL
NSTL
万方数据