小波分析在谐波电能计量中的应用
Application of the wavelet transform analysis method in harmonic energy measurement
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摘要: 针对近年来由于电力系统非线性负载日益增多而导致的电网谐波污染问题,为了提高电能表计量的准确度,提出了基于Mallat算法的小波变换方法.该算法利用其多分辨率分析的特点来提取信号中各阶次谐波,通过小波重构来实现各频带内谐波参数的测量及对谐波变化的准确跟踪观测.Matlab仿真结果验证了该方法的可行性和高效性.Abstract: Aiming at the problem that more and more nonlinear loads of power system lead to the pollution of electrical network harmonic,the wavelet transform method was put forward based on Mallat arithmetic in order to improve accuracy of measuring.This method picked up every existent harmonic of the signal by using its multi-resolution analysis,realized the measurement of harmonic parameters within each band and tracked observation of harmonic change.The simulation results proved that the method was feasible and effective.
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