基于椭圆IIR滤波器组小波包分析的功率测量方法  

Power Measurement Method Based on Wavelet Packet Analysis Using Elliptic IIR Filters

作　　者：海瑛[1] 陈敬虞[1] 钱苏翔[1] 张伟[1] 

机构地区：[1]嘉兴学院机电工程分院,浙江嘉兴314001

出　　处：《电测与仪表》2009年第6期9-12,25,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(50575095);浙江省嘉兴市科技局基金资助项目(SA2008BY2002)

摘　　要：小波包分析可以实现信号频带的均匀划分,为电压、电流有效值及有功功率高精度的测量提供了理论依据;但其复杂的计算使它在实时测量中受到了限制。本文提出了将椭圆半带IIR滤波器应用于小波包分析的功率测量新方法,通过研究表明,该方法可以将复杂的计算减少到与快速傅立叶变换(FFT)同等数量级上。仿真和实验结果进一步验证了该方法的可行性。The Wavelet packet analysis can uniformly divide basis for accurate measurement of RMS and power, but the frequency band of signals, and provide the theoretical computational complexity of Wavelet packet analysis limits its use in real-time metering. This paper presents a new method using all-pass implemented special half-band elliptic infinite-impulse-response filters in the Wavelet packet analysis of power measurement. The study reveals that the proposed implementation can reduce the computational complexity to levels comparable to FIT. Reality of the proposed implementation is evaluated by results of simulation and tests.

关 键 词：小波包分析 椭圆半带滤波器组 功率测量 有效值(RMS)测量 

分 类 号：TM76[电气工程—电力系统及自动化]