Smart controller design for frequency control of an integrated microgrid

Abstract

Frequency variations are caused by load deviations and renewable energy sources in a microgrid. These variations could result in system instability and large fluctuations of frequency and voltage in a microgrid. The microgrid considered here consists of conventional generator, renewable energy sources and battery energy storage system. This paper deals with designing robust controller to cope up with frequency variations in the microgrid. We develop PID, µ-synthesis, FOPID and SMC controller where robustness to uncertainties and disturbances are compared for system frequency fluctuations. All the simulations are conducted in the MATLABTM and simulinkTM.