Research On Wind Power Access To Microgrid Operation Control

With the development of our country’s economy, the demand of electricity in all walks of life is growing fast, at the same time, the size of grid is becoming more and more large, and more and more new power plants is being built. At present the power grid exist many problems such as low reliability, high cost, and form a complete set of traditional power generation equipment is expensive, environmental pollution, and large area covering. Wind power equipments’ price is relatively low and covering a small area. But wind power generation voltage is not very stable, so it can’t be directly incorporated into the power grid; and due to its small output power, the power supply area is small, and its supplied load can’t too big.In order to solve these problems, the United States put first step to put forward a concept of micro grid in 2001. Micro grid can interconnect with external power grid, and also could be no connection with external power grid as an independence grid. There are two kinds of operation mode in the micro grid which has operation of external power grid: isolated network and connected network. This paper focus on micro grid and wind power technology access control. First, based on the principle of wind power and its equivalent circuit modeling with MATLAB / SIMULINK, to verify the feasibility of simulation, and then combine them to establish access to the entire wind power and micro grid model simulation, with the simulation of wind power machine and network could obtain optimum conditions, and simulate the islanding detection method, verify the effectiveness of the proposed method. This paper put forward an assumption of the same number of DG wind generator capacity and grid connected both transient process consistent hypothesis, and verify it through MATLAB / SIMULINK; establish micro grid control strategy simulation, verified the strategy can or not effectively control the fluctuation of microgrid.