An analytical framework to design a Dynamic Frequency Control scheme for microgrids using energy storage

Abstract

Microgrids with increased penetration of renewables have significant frequency excursions to power generation changes. A straight forward approach to solve this problem is by enhancing the inertia of the system using energy storage (ES). They provide Dynamic Frequency Control (DFC) support to the interconnected Distributed Energy Resources (DERs) in the microgrid. However, the amount of inertial support required from the ES varies based on the type of interconnected DERs, the amount of load change and many other factors. This paper proposes an analytical framework for calculating the inertia required from the ES systems during a generation change. A case study to corroborate the proposed framework for the DFC scheme has also been studied.