摘要
Abstract
In general, the active power filter is required to filter harmonic current within 50 times for ordinary indus-trial load.The traditional PI control can only be carried out on the dc component without difference; what’s more, the bandwidth is not enough.In order to solve this problem, the current loop controller which is feed forward decou-pled in d-q synchronous rotating coordinates is improved in this paper, and the hybrid control strategy which is com-posed of the parallel connection of repetitive control and parameter self-adjusting fuzzy PI control is proposed, the pa-rameters of repetitive control loop are optimized.For the traditional PI control strategy of voltage outer loop, for the setting of the PI parameters is rather complex, when the load of the system experiences acute fluctuation, it will be un-able to maintain stability and then generate a lot of ripple, the robustness of the system will be worse, so this paper will use the Fuzzy-PI dual-mode control strategy.For the aboved control strategy, the simulation model is set up on computer, the results show that compared to the traditional PI control strategy, the introduction of composite control strategy has faster dynamic response speed and higher precision of harmonic compensation, and compared to the tradi-tional PI control strategy in the dc side, the introduction of the Fuzzy-PI dual-mode control strategy has good robust-ness and fast response.关键词
有源电力滤波器/双闭环解耦/参数自调节模糊 PI 控制/重复控制/模糊 -PI 双模控制Key words
active power filter/double closed-loop decoupling/parameter self-adjusting fuzzy PI control/repetitive control/fuzzy-PI dual-mode control分类
信息技术与安全科学
