【摘要】 介绍了基于小波变换理论的电压电流有效值、有功功率和无功功率分频带测量的基本原理与算法,分析了IIR双通道滤波器组的结构与组成,并对该方法与传统FFT算法进行了比较。采用西安化工厂实际信号进行有效值、有功功率、无功功率的测量,实验结果表明其精度可以达到10-5级,具有较高的准确度。更多还原

【Abstract】 Sub-band RMS,real power and reactive power measurement principle and algorithm based on wavelets were introduced firstly,then analyzed the structure and constitute of IIR two channels filter bank,and compared this method with FFT.Actual data of Xi’an Chemical Plant were adopted to test the measurement method of sub-band RMS,real power and reactive power.The results were accurate,and its precision could reach 10-5.更多还原