采用遗传算法和匹配追踪法检测电压闪变参数

摘要

As the voltage flicker phenomenon becomes increasingly serious in the power system,voltage flicker detection has been drawn more and more attention. The matching pursuit algorithm based on genetic algorithm optimization is applied into the detection of voltage flicker, to detect the parameters of amplitude, frequency and phase of amplitude modulation ( AM) components in voltage flicker. Firstly, the fundamental component in voltage flicker signal is decomposed by using Fourier transform, then the rest AM components are decomposed by using their matching parametric atom, and the parameters of each AM component can be obtained. Finally, the effectiveness of the detection scheme is verified in simulation.%随着电力系统中电压闪变现象的日趋严重，电压闪变检测受到人们越来越多的关注。将基于遗传算法优化的匹配追踪算法应用于电压闪变检测中，检测电压闪变中调幅分量的幅度、频率和相位等参数。先利用傅里叶变换分解出电压闪变信号中基波分量；然后将剩下的调幅分量用与之结构相匹配的参数原子进行分解，同时可获得各次调幅分量的参数；最后，通过仿真验证了该检测方法的有效性。