Automatic Load Frequency Control for Interconnected Micro-Grid System

Abstract

In this paper, automatic load frequency controllers (ALFC) are considered for an interconnected micro-grid system to enhance the transient performance of frequency deviation. The widespread use of renewable energy in an interconnected micro-grid would cause frequency instability. Frequency stability is a significant concern for the operation of interconnected micro-grids. The modeling of interconnected micro-grids comprising of a wind power generation, a diesel engine generator and Energy Storage system. A conventional Proportional Integral Derivative (PID) controller tuned by Ziegler-Nichols method (ZN) is designed for the sample interconnected micro-grid system for improving the frequency stability. The efficacy of ALFC for interconnected micro-grids is demonstrated using MATLAB/Simulink under abrupt change in load demand and uncertainties in system parameters. The results obtained through simulation are validated in HIL simulation environment using Real Time Simulator.