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基于整流桥非线性负载电流分析,给出三相并联型有源电力滤波器的一种新型谐波检测算法。对新型谐波检测算法的原理进行了阐述并给出其实现方法,阐述了谐波检测滤波器的设计方法,分析和研究对负载突变时谐波检测算法对直流母线电压影响机理,指出负载突变时直流母线电压波动的原因。最后,就全谐波检测算法和新型谐波检测算法进行仿真和实验对比研究,结果验证了新型谐波检测算法的可行性和可靠性。
Based on the nonlinear load current analysis of rectifier bridge, a new harmonic detection algorithm of three-phase shunt active power filter is proposed. The principle of the new harmonic detection algorithm is described and its implementation method is given. The design method of the harmonic detection filter is expounded. The influence mechanism of the harmonic detection algorithm on the DC bus voltage when the load is abruptly changed is analyzed. DC bus voltage fluctuations when the reasons. Finally, the simulation and experimental comparison of the full harmonic detection algorithm and the new harmonic detection algorithm are carried out. The results verify the feasibility and reliability of the new harmonic detection algorithm.