A Novel Scheme for Enabling Air Conditioners to Participate in Primary Frequency Control

An islanded Microgrid (MG) may experience large frequency variations due to load variations, intermittent power generation of renewable sources and etc. Therefore, providing a reliable frequency control scheme is vital for islanded operation of an MG. The utilization of a fast-responding source like a Battery Energy Storage System (BESS) is indispensable for dealing with the frequency variations. In this paper, a novel control scheme is proposed for enabling the participation of Air Conditioners (ACs) alongside the BESS in primary frequency control. The simulation results show that the cooperative application of BESS and ACs results in less frequency deviation than the case just BESS is used. The BESS maximum power injection/absorption is decreased which results in the battery life extension.