基于改进自适应谐波检测滤波器设计与仿真

Based on Improved Adaptive Harmonic Detection Filter Design and Simulation

为了减少因为定步长自适应算法值的选择对滤波效果的影响程度,减少谐波稳态分析的误差,提高跟踪响应的速度,并验证基于改进自适应算法滤波器的有效性和优越性,利用Matlab与电磁暂态软件PSCAD/EMTDC的接口,将在Matlab中编写的自适应步长迭代的程序导入PSCAD中电力系统谐波分析的模型中。通过与一般滤波器的滤波和基于定步长理论设计的滤波器的比较,并通过快速傅立叶变换(FFT)得出的各谐波幅值在滤波前后的比较,验证了基于改进自适应算法理论的带通滤波器,具有较好的滤波效果。

In order to reduce the choice of the value of fixed steo size of adaptive algorithm＇s effect degree of filter harmonic,reduce harmonic steady-state analysis of errors,improce tracking response speed,and verify that the improve filter adaptive algorithm＇s effectiveness and superiority.use matlab and electromagnetic transient software PSCAD / EMTDC interface,written in matlab adaptive step in the iterative process into PSCAD Power System Harmonic Analysis model.The filter with the general set-based design of the filter step comparison of theory and,through Fast Fourier Transform（FFT） the harmonic amplitude obtained before and after the filter is verified by comparing theory based on an improved adaptive algorithm bandpass filter has good filtering effect.