单独注入式混合型有源电力滤波器复合控制策略的研究

本文建立了单独注入式混合型有源电力滤波器的电气模型。根据此模型综合比较了混合型有源电力滤波器的两种常用控制策略,提出了一种基于检测电网谐波电压与谐波电流的混合有源电力滤波器复合控制方案,并对其补偿性能和抑制电网频率和系统阻抗变化的影响进行了分析。为了实现系统的无差控制,提出了基于递推积分的PI算法,并且由模糊推理在线整定比例系数和积分系数,该算法能有效地提高系统的动态和稳态性能。仿真和实验结果表明采用这种复合控制的注入式混合有源电力滤波器能达到较好的滤波效果。

Study on compound control strategy of hybrid active power filter with single injection branch

In this paper an electrical model of the shunt hybrid active power filter with injection branch(SIBAPF) was built.Two control strategies for hybrid active power filter are compared according to this model,and then a novel control strategy based on the detection of harmonic voltage and harmonic current of the grid was proposed.Meanwhile,the performance of harmonic current compensation and its influence on suppressing variation of frequency and impendence of the system when the proposed strategy is adopted is analyzed.In order to improve the dynamic performance of the system and realize no error control,a complex controller based on recursive integral PI control is proposed.And the parameters of the controller are on-line tuned by fuzzy inference to enhance self-adaptive ability of the system.Simulation and experimental results show that the SIBAPF can reach an ideal filter effect when the proposed novel control strategy is adopted.