Fuzzy Adaptive Strategy based on Finite-time Observer for Virtual Synchronous Generator in Frequency Regulation of Microgrid

Abstract

A rule-based adaptive Virtual synchronous generator (VSG) control has been proposed for the frequency regulation of converter supported microgrid systems in this paper. Previous studies show that fixed-parameters VSG control strategy cannot adequately cope with the power changes, disturbances and frequency variation. On the other hand, a conventional adaptive strategy for VSG control is based on linear quantification, which limits the adaptivity of parameters. In this paper, a novel fuzzy adaptive approach based on the finite-time observer for VSG control is proposed and implemented in a microgrid system with energy storage system (ESS). The range of inertia is also considered. Finally, the proposed control strategy based on the observer is tested and verified in a microgrid system with PV array and energy storage battery on DC side.