Optimal configuration for distributed generations in micro-grid system considering diesel as the main control source

This paper purposes an optimal configuration of the distributed hybrid renewable generations based the stand-alone micro-grid system, considering the diesel as the main control source. Due to the natural sources and load of user changes randomly and the nonlinearity of the power output by renewable generations, an intelligent optimization method based improved genetic algorithm and the control strategy were discussed with the hybrid renewable system which the model form is wind-PV(Photovoltaic)-diesel-battery. The instance analysis comparing the optimization result of the hybrid system based on HOMER and improved GA(Genetic Algorithm) method on MATLAB. The simulation result of the optimal configuration showed the new hybrid renewable system would improve the power supply situation which decreased the cost of energy greatly compared with the conventional form of power supply system which was operated only by diesel. And the conclusion of the comparing result between HOMER and improved GA method showed the advantages of the strategy for the diesel as main control sources.