Study on Power Decoupling Control of Three Phase Voltage Source PWM Rectifiers

This paper proposes a new power control strategy of three phase voltage source PWM rectifiers to solve the coupling between instantaneous active power and instantaneous reactive power. This strategy is obtained based on the power control math model of three phase voltage source PWM rectifiers in synchronous dq coordinates. A new power control switching table is set up according to new dividing of input voltage space and resultant voltage space vectors for improving the properties of system and saving complicated PWM modulation module. The switching functions is selected in new power control switching table according to the position of source voltage space vector and input voltage space vector of rectifier required. This paper gives a design method of system controller. The control strategy is proved feasible by simulink simulation with different loads.