基于时域的谐波和无功检测技术的对比研究

谐波和无功检测技术在电能质量治理装置的应用中起着重要作用,检测结果的准确性、实时性和抗干扰性是保证装置的补偿工作性能的前提条件。本文介绍了现有6种时域的谐波和无功检测方法的工作原理,并根据电源电压和负载电流是否三相平衡及包含谐波和无功与否等不同情况设计了8种不同的工况。在这8种不同工况下,结合6种谐波和无功检测算法,并将其应用于三相三线制有源电力滤波器(APF)系统中,使用Matlab/Simulink软件分别对各种不同组合的工况进行仿真分析。根据仿真结果,对比分析了各种组合下的谐波和无功补偿指令信号、有功和无功功率及其功率因数。总结了所采用的APF系统在不同工况下各种检测算法的检测性能,分析了各种算法所适用的工况。实验验证了理论分析和仿真结果的正确性。本文的研究成果为电能质量治理及其控制算法的研究提供了理论参考,为电能质量治理装置的设计与研发提供了切实可行的依据。

Comparative study of harmonic and reactive power detections based on time domain

Harmonic and reactive power detection technique plays an important role in the applications of power quality control devices.The accuracy,real-time performance and anti-interference of the detection results are the preconditions to ensure the compensation performance of the device.This paper introduces the working principle of 6 kinds of harmonic and reactive power detection methods,and 8 different working conditions are designed according to whether the power supply voltage and load current are balanced or not,including harmonic and reactive power or not.Under these 8 different conditions,combining 6 kinds of harmonic and reactive power detection algorithm,Matlab/Simulink software was used to simulate under the working conditions of different combinations applying to three-phase three wire active power filter (APF) system.According to the simulation results,the harmonic and reactive power compensation signals,reactive power and power factor are analyzed and compared.The detection performance of various detection algorithms under different working conditions is summarized,and the working conditions suited with various algorithms are analyzed.The experimental results verify the correctness of the theoretical analysis and simulation results.The research results of this paper provide a theoretical reference for the research of power quality control and control algorithm,and provide a practical basis for the design and development of power quality control devices.