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A Natural Switching Current Peak Control Strategy for Three-phase Rectifier
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    Abstract:

    The natural switching trajectories of direct-current(DC)side voltage and AC side current of T-type three-level rectifier are presented in this paper. Based on this trajectory,the natural switching control method is de? veloped by combining the direct power control theory with the natural switching trajectory theory. Under this control method,when the load is disturbed,the output current overshoot is serious and the dynamic process of the system is not smooth. In view of this phenomenon,according to the idea of current peak control in DC converter,a current peak control strategy suitable for natural switching control method is proposed,that is,adding a third running track to the original natural switching track and directly limiting the output current,so as to make the dynamic process of the system more smooth. It is verified in MATLAB 2019a simulation environment.

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  • Received:
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  • Online: March 04,2022
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