LAUSR

Abstract This paper proposes a coordinated control scheme for proper and seamless power management of the study AC microgrid system including wind and diesel generation sources, where the generator at both wind and diesel generation sources is from the doubly-fed induction generator (DFIG) type. In this way, at first step, the wind energy source works in the power control mode and injects available wind power to load AC bus, and diesel generator provides AC voltage with constant magnitude and frequency. But, by using this control approach, the available wind power may go beyond the load power leading to overvoltage at local wind and diesel AC buses. Hence, the diesel generator, for creating the rated AC voltage, may absorb the extra wind power. Therefore, in order to address the issues of overvoltage and power return to the diesel unit, the control loops of the DFIGs in the wind and diesel generation sources are enhanced for proper and seamless power management, where the proposed approach is realized by using local AC bus voltages and without any communication facility. By using the proposed control method, the study system seamlessly tracks the load demand without any transient and switch from one control mode to another.