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A new control strategy of unity power factor for three-phase PWM rectifier system

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5 Author(s)
Jinbang Xu ; Control Sci. & Eng. Dept., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Jin Zhao ; Ling Luo ; Xiaozhen Ma
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According to the characteristics of high frequency rectifier systems, this paper proposed a fuzzy-logic PI-type voltage controller for the outer loop of the system with optimized control rule and membership function distribution based on fuzzy control principle so as to improve the dynamic response of direct busbar voltage. At the same time, the inner loop used proportional current adjuster with space-vector control scheme in order to increase the tracking speed of the current to the voltage and decrease the harmonic of the input current of the electrical network and the direct busbar voltage. We have made check experiment of traditional PI controller versus fuzzy controller and SPWM control scheme versus SVPWM control scheme based on Matlab-Simulink platform and we can conclude that this method can greatly improve the performance of the system without changing the topology of the original system and increasing the complexity of the adjuster implementation and it is of great importance for the engineering experience.

Published in:

Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE  (Volume:1 )

Date of Conference:

2-6 Nov. 2004