Abstract
This paper analyzes basic principle of DPC of three-phase voltage-source PWM rectifier, and presents its shortcomings of high and unfixed switching frequency. On this base, it proposes the method of combining DPC and three-level voltage space vector pulse width modulation(SVPWM), which reduces and fixes switching frequency. To overcome the shortcomings of complex control and complicated calculations of traditional SVPWM algorithm, the paper proposes an equivalent three-level SVPWM algorithm of dual-carrier modulation, and in the d-q coordinates, and a control strategy of power feed forward decoupling control of traditional DPC, which realizes the dynamic decoupling of active and reactive power. The MATLAB/SIMULINK simulations verify the feasibility of this control strategy.
Published Version
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