【摘要】 Kaiser窗是一种可以任意调整窗谱主瓣宽度与旁瓣衰减比例的函数。以瞬时无功功率理论为基础,提出一种谐波电流的实时检测新方法,用Kaiser滑动时窗截取谐波电流信号,通过对窗函数参数的选定,提高了谐波电流检测的准确性。利用MATLAB建立仿真模型,对该方法进行了分析和研究。并以检测7次正序电流分量为例,在研制的30kVA有源电力滤波器中验证了该方法的有效性和实时性。更多还原

【Abstract】 Kaisers window is such a function which can freely change the main-lobe width of window spectrum and the attenuation proportion of side-lobe proportion. On the basis of instantaneous reactive power theory, a novel real-time detection method of harmonic currents is presented, that is, the harmonic current signal is cut-off by Kaisers slip window and through the selection of the parameters of window function the detection accuracy of harmonic currents is improved. This method is analyzed and researched with a simulation model established by MATLAB. Taking the 7-th order component of positive sequence current for example, the effectiveness and real-time performance of the presented method is verified by a 30kVA active power filter.更多还原