| Microgrid is a good complement to the large grid system,especially in remote areas with geographical limitations and high transmission costs.Micro grid system is also the preferred carrier of distributed energy,distributed power is mostly based on renewable energy with low power cost.On the one hand,due to the instability of natural resources,the distributed energy system generally has great fluctuation and intermittence.Especially in the case of combined operation with many types of distributed Energy,the volatility is more difficult to control.Through reasonable planning and design,micro grid system can effectively stabilize multiple types of distributed energy system instability.In this paper,two islands are designed to micro grid system model.Through the investigation analyze on existing power supply configuration,load forecasting,wind and solar resource,a micro grid system model with combined operation among wind power,photovoltaic power,power inventory system and diesel generator is proposed.Based on branch and bound algorithm,I designed a optimized combined operation module of micro grid,and create operation modules for distributed photovoltaic power,wind power,power inventory system and diesel generator.Through using Yalmip toolbox of Matlab simulation software and IBM ILOG Cplex as the calculator,I simulated the designed module of micro grid and studied the availability of renewable energy,technical and design feasibility and quantified the commercial efficiency based on various operation conditions of isolated mode.The results show that the design of the combined operation of wind power,solar power,power inventory system,diesel generator in this micro grid system module are feasible in economy and technology.Finally,by simulating the joint operation of the microgrid after connecting the grid,it is concludedthat the economic efficiency of this microgrid system will be further improved after connecting with grid. |
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