摘要
针对暂态电能质量扰动及不易检测的特点,提出一种基于卷积型二进小波变换的电能质量信号定位与检测方法,利用二进小波变换模极大值对应信号的突变点检测电能质量扰动信号,采用Matlab仿真软件对短路故障及电容器投切引起的电压暂态信号进行仿真。结果表明,该法行之有效、尺度定位准确。
Due to the difficult detection of power quality （PQ） disturbances, this paper proposed a method of detection and localization of PQ transient signal based on dyadic wavelet transform. It carries out power quality transient signal detection, using the characteristics that modulus maximum of binary wavelet transform corresponds to abrupt change points of PQ transient disturbance signal. Through the simulation of short--term failures and voltage transient signal caused by capacitor switching, the results show that the method is effective and has accurate positioning scale.
出处
《水电能源科学》
北大核心
2009年第3期177-179,共3页
Water Resources and Power
关键词
电能质量
二进小波
暂态信号
检测和定位
模极大值
power quality
dyadic wavelet transform
transient signal
detection and localization
modulus maximum
