功率因数数字化精确测量方法探讨  

An Accurate Digital Measurement Method of Power Factor

作　　者：冯雪[1] 

机构地区：[1]上海交通大学电气工程系,上海200030

出　　处：《高压电器》2009年第4期90-93,共4页High Voltage Apparatus

摘　　要：在分析与总结了传统功率因数测量方法的基础上,提出了基于数字信号处理(DSP)技术的功率因数测量方法。充分利用DSP在信号分析与处理方面的优势,先进行同步采样得到电压、电流的采样序列,再进行数字滤波和傅氏滤波,可以精确得到基于工频分量的功率因数。最后仿真并证明了此方法的正确性。By analyzing the conventional power factor measurement methods, a new measurement method of power factor based on DSP technology is proposed. Making full use of the advantages of DSP in signal analysis and processing, software synchronous sampling is performed in advance to get the sampling series of voltage and current, then digital filtering and Fourier filtering are conducted to gain the accurate power factor based on power frequency fundamental component. Simulation result demonstrates the correctness of this method.

关 键 词：功率因数 数字化测量 软件同步采样 数字信号处理 数字滤波 离散傅里叶变换 

分 类 号：TM933.31[电气工程—电力电子与电力传动]