Distributed self triggered control for asymptotic synchronization in inverter based microgrids

This paper deals with an event triggered distributed hierarchical control for microgrids. An event triggered control (ETC) framework has been integrated with a two-level distributed hierarchical controller for frequency synchronization among distributed generators in a microgrid over shared band network. The primary droop controlled inverter based distributed generators have been modeled as Lure systems. The ETC aims to reduce communication requirements, thereby enabling control of large scale systems. The secondary controllers employ state estimators to estimate states of neighboring generators when network is interrupted. An L 2 stability preserving event trigger rule is designed such that zeno behavior is eliminated. Simulation results establishing frequency regulation while simultaneously ensuring proportional load sharing among participating generators have also been included.