电机与控制应用2017，Vol.44Issue(4)：107-111,5.
变频器输出有功功率测量方法研究
Research of Measurement Methods for Output Active Power of Inverter
李海国 1常越 1王达开 1张晓斌 1王娇娇1
作者信息
- 1. 上海交通大学电子信息与电气工程学院,上海200240
- 折叠
摘要
Abstract
Two methods to measure the output power of inverter was discussed:calculating the output active power by getting the fundamental amplitude and phase of the output phase current through the FFT transform and obtaining the fundamental amplitude and phase of the output phase voltage according to the features of PWM modulation wave;regarding the phase current as fundamental current,and calculating the active power by average the instantaneous power within a period,which came from the sample current multiply PWM modulation value.The FFT method had a strong anti-interference ability to the harmonic current,and could obtain fundamental amplitude and phase accurately,yet it required more CPU resources.The latter method was simple in calculation and required less CPU resources,but it was sensitive to current harmonics.The experiment of the actual system showed that the methods to measure output power of inverter was workable.关键词
变频器/有功功率测量/脉宽调制Key words
inverter/active power measurement/pulse width modulation (PWM)分类
信息技术与安全科学引用本文复制引用
李海国,常越,王达开,张晓斌,王娇娇..变频器输出有功功率测量方法研究[J].电机与控制应用,2017,44(4):107-111,5.
