摘要
介绍了一种可用于非正弦情况下功率测量的数字算法,并研究了在虚拟仪器中的应用。目前,传统FFT算法受频率变化的影响较大,而Gauss-Newton法先把频率设定为一个初始值,用迭代的方法来确定电压电流信号及功率分量。本文给出了在计算机上模拟测试的结果,采用虚拟仪器语言LabVIEW编写算法程序,对该算法和FFT算法进行对比分析。仿真证明:该算法具有收敛较快且测试结果不受频率变化影响的优点,结合虚拟仪器平台,可得到较快的处理速度,可以满足实时测量的需要。
This paper presents a numerical algorithm for power measurement in nonsinusoidal conditions and studies the application in Virtual Instrument. Now, the traditional FFr algorithms showed the sensitivity to frequency variation. The Gauss-Newton algorithm assigns the initialization value for frequency, using the iterative procedure to determine voltage and current signals and power components. This article gives the simulated results, composes the algorithmic program using LabVIEW software, and compares the Gauss-Newton algorithm to FFT algorithm. In fact, the algorithm converges very fast and the test data are not sensitive to frequency variation, the algorithm operates fast when combines Virtual Instrument platform, and can meet the demand of real-time measurement.
出处
《电测与仪表》
北大核心
2007年第5期1-4,共4页
Electrical Measurement & Instrumentation
