Robust frequency control of Microgrid for rural electrification

Abstract

The proposed paper introduces a microgrid mainly containing non – conventional energy sources, Diesel Engine Generator (DEG) as the only conventional source and Battery Energy Storage System (BESS) as an energy storage device. The use of non – conventional energy sources can act as a solution to the electrification problem of rural areas along with reducing the global temperature. But the stochastic nature of solar power and wind power leads to frequency instability. Therefore, an advanced Fractional Order-Proportional Derivative Proportional Integral (FO-PDPI) controller has been used which outperforms the classical Proportional Integral Derivative (PID) controller showing superior load frequency response characteristics. To get optimal parameter values, the controller is tuned by using Multi Verse Optimization (MVO) Optimization technique. Further, a stability test has been made using a root locus plot.