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出 处:《继电器》2005年第7期46-49,共4页Relay
摘 要:提出了一种简单实用的电能质量扰动检测方法:首先对原始信号做差分处理,通过监测差变信号中的突变起始点,检测是否有扰动出现;接着分三种情况检测扰动的持续时间;然后在存在扰动的区域内应用快速傅里叶算法计算扰动幅度。各种扰动信号的仿真结果表明,该方法快速、准确,有较高的实用价值。A simple and practical method of measuring duration power quality disturbances is introduced. A differential signal is formed firstly for detecting the beginning time of the disturbance; then ending time when the lasting time is more than, equal to and less than one primitive period are located respectively; at last, the range of the disturbance is calculated through Fourier transform. Simulation results of various disturbance signals demonstrate the proposed method is fast, accurate and useful.
分 类 号:TM933.4[电气工程—电力电子与电力传动]
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