In the planning of an independent micro grid

optimize capacity of system have important economic significance basis on considering meet the load demand and environmental protection.A model is built for the study of effective method to optimize capacity of independent micro grid.It takes system operating costs as well as renewable energy power supply ratio and system power smoothness as objects.When calculate weight coefficient of sub goals

combine fitness deviation sorting method with fuzzy analytic hierarchy process propose a kind of weight coefficient comprehensive analysis method.Finally

using the adaptive chaotic particle swarm optimization algorithm calculate the optimal solution.Taking a regional demonstration project as an example

simulation and experimental results show that using the proposed method to optimize capacity of system can save costs 182

650 yuan and made a good economy.An effective method is provided for capacity planning of independent micro grid.