Microgrid energy management system and its control strategy

Abstract

This paper presents the basis analysis of control strategies developed in microgrid control structure, when it is integrated with microsources. Due to weather conditions, the microgrid system used an unavoidable input power perturbation, produced by the renewable energy. This perturbation causes unbalance in power system between the energy produced and consumed, as well as creating output voltage and frequency to fluctuate. Therefore, different methods of energy management systems employed in microgrid, in order to stabilise the system are discussed. Among those energy managements, the control strategy of the load management have been developed and analysed through MATLAB/ SIMULINK simulation. The simulation results justified the stability of the microgrid operation under irregularities of the input voltage. The flow chart transition method based on graphical transition state is employed to maintain the output voltage of the microgrid; this was attained by switching ON and OFF certain unnecessary loads upon considering the available input power.