Microgrid energy management system control strategy

The analysis of control strategies developed for a microgrid control structure is presented in this paper, when it is integrated with renewable energy source. Due to weather conditions, the microgrid system with renewables is presented with unavoidable input power perturbation, produced by the renewable energy. This perturbation causes an imbalance in the power system between the energy produced and consumed, as well as creating frequency fluctuations in the output voltage. Different methods of energy management are employed in the microgrid, in order to stabilise the system. A control strategy for the load management have been developed and analysed through MATLAB/Simulink simulation. The simulation results justify 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 noncritical loads upon considering the available input power.