Robust Distributed Finite-time Secondary Frequency Control of Islanded AC Microgrids With Event-Triggered Mechanism

Zhenhua Wang, Hepeng Li, Haibo He, Yan Sun

Abstract: This paper investigates the frequency regulation and active power sharing problem in islanded AC microgrids. Considering the effect of external disturbances, a novel robust distributed secondary control scheme under directed communication graphs is proposed. The proposed control scheme can restore frequency to the nominal value and achieve precise active power sharing in finite-time. By using an event-triggered strategy, the proposed distributed secondary control method can reduce the communication resources and the number of controller updates. The stability of the proposed control method is analyzed. Moreover, there is no Zeno behavior. Finally, numerical simulations are presented to validate the effectiveness of the proposed controller.