Voltage Regulation for the Dual Stator-winding Induction Generator Based on the Direct Power Control

A control strategy based on the control winding instantaneous power direct control for dual stator winding induction generator (DWIG) system is proposed. The control mechanism is firstly analyzed, and influence of the instantaneous active and reactive power in the control winding on the system voltage is disclosed. The strategy of the direct power control by selecting approporiate voltage vectors is then presented, through which the power errors are restricted in a certain band. The pulse width modulation is formed to realize the system voltage control. The detailed description on the DPC part is presented, including the command power generation, the instantaneous active and reactive power calculation, the power hysteresis and the optimal switching table. Experiments on a 18 kW DWIG system are provided to demonstrate the effectiveness.