Triple-state hysteresis direct power control for three phase PWM rectifier

Traditional DPC applies the double-state hysteresis control, lacking the decoupling control ability of reactive and active power, while traditional triple-state DPC is degraded by high frequency chattering and the current regulate ability is poor. A new triple-state hysteresis DPC based on power analysis is designed in this paper. A power zero state and hysteresis comparator is added into the switching table. The rectifier voltage vector is selected based on the voltage sector and power hysteresis comparator. The ability of decoupling power and dynamics performance are improved by this method. A simulation model is established under MATLAB/simulink for the traditional DPC, improved DPC, traditional triple-state DPC, and the triple-state hysteresis DPC. The comparison and analysis of simulation results illustrate that the triple-state hysteresis DPC proposed in this paper has the features of low THD and high power factor and improve the dynamic and static performance of reactive and active power.