The optimal capacity combination model of an isolated microgrid is established, which considers the pollution emissions, the punishment of renewable energy waste, the effect of charge and discharge process of lead-acid battery to its lifetime and reliability, the total cost and punishment of renewable energy waste are considered as the two objective functions. This paper establishes isolated microgrid multi-target capacity optimization configuration model, and the adaptive genetic algorithm is

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... roposed to solve the problem,then the paper analyses the effect of the punishment of wind energy waste and the reliability to capacity combination of microgrid. Example analysis results show that the punishment of wind energy waste has great effect to capacity combination of microgrid. The punishment of wind energy waste should be considered in the network planning; the reliability also has a great influence on the microgrid planning, and the different investment schemes should be selected according the different user reliability requirements.