基于乘法器和LabVIEW仿真的谐波分析

Analysis of Harmonics Measurement Based on the Multiplier and LabVIEW Simulation

针对非线性电力电子元件大量广泛的应用而使电网出现严重的电磁污染问题,本文基于乘法器的基本原理,对谐波的测量方法进行研究,从理论上对该测量原理的幅度误差和相位误差进行分析,并在虚拟仪器平台LabVIEW上进行仿真验证。仿真结果表明,在将谐波的测量次数增加到31次时,测量结果准确度高,充分证实了利用乘法器原理的谐波分析是正确可行的,而且提高了谐波可测范围。该方法原理简单、计算量小、速度快且易于实现,是分析和解决谐波的开端,为解决电网上的电磁污染提供了理论参考。

Leaving the grid serious electromagnetic pollution problem for a large number of widely used in nonlinear power electronics,the paper based on the basic principle of the multiplier of harmonic measurement method,studied theoretically the magnitude of the measurement principle and phase errors for analysis,and simulation on the virtual instrument platform LabVIEW.The simulation results show that when measuring the number of harmonics to 31 times,high accuracy measurements,fully confirmed by the multiplier principle of harmonic analysis is correct and feasible,but also increase the range of harmonics can be measured.The principle of the method is simple,small amount of computation,fast and easy to implement.The method is the beginning of harmonic analysis and resolution and provides a theoretical reference in solving electromagnetic pollution power line.