| This paper focuses on the study of the impact of large-scale wind power grid on grid voltage.The thesis mainly studies this topic from the following aspects:First,analyze the current situation of wind power supply in China and the world and predict its future development direction.The model of wind turbine dynamics was studied,and the type and characteristics of wind turbine,working principle and structure of wind turbine were pointed out.The structure of H93N-2.0 MW superplateau fan is introduced emphatically.Some problems related to wind power generation connection to the power grid are discussed.The construction and operation methods of dual-feed generators are clarified,and the model construction of wind farm is simulated.Secondly,the study on the mathematical model of wind turbine is introduced in detail by establishing the mathematical model of wind speed,wind turbine,double feed asynchronous generator and double feed wind generator power control model.Thirdly,the use of power flow calculation can be carried out with the use of Newton-Lawson method to discuss and analyze the effect of the voltage stability of the power grid on the access of wind farms.Finally,a solution to the effect of wind farm on voltage is proposed.Using reactive power compensation technology,reactive power compensation capacity determination,reactive power voltage control and other aspects of theoretical research,put forward wind power field reactive power compensation to improve the power quality of the grid,for wind power field safe,reliable,stable operation and control of reference.The application of low electric traversing ability technology solves the important role of fan in maintaining the stable operation of the power grid after the voltage mutation,and avoids the safety hidden danger brought about by the fan's large area denetting. |
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