The Research On Grid Access Technology Of Wind Farms

With the continuous energy shortages and protect the environment, growing louder and louder, the wind energy as a renewable clean energy by the renewed attention of the world, wind power has become all countries are scrambling to develop forms of electricity generation. The construction of the wind farm is just a start, how the electricity generated by the wind farm connected to the grid, the significance of the people, is the development of wind power.This paper first introduces a constant speed asynchronous fan DFIG Wind Turbines and permanent magnet wind turbine wind farm, to analyze the different wind farm grid topology, in contrast the three existing grid, select the application of light DC wind farm grid program.Then introduces a new power system simulation the software digsilent/powerfactory and established in conjunction with the software features two main wind farm DC grid system simulation model; focusing on analysis of the mathematical model and control of the of wind farms DC grid system strategy; simulation software based on the steady state and dynamic simulation studies.Next, the analysis of the impact of a grid failure caused by the different types of wind farms focus on additional hardware circuit the wind farms DC grid system, energy buffer, so that wind farms can travel throughout the fault set from the DC line, stable operation, and software platform digsilent/powerfactory the simulation analysis.Finally, has carried on the loss and constant voltage analysis to wind farm directing current on-grid photovoltaic system, has studied in the electrical power system the short trouble that emphatically is easy to have, and has made the short circuit numerical simulation.