Independent Pitch Control Strategy and Simulation for Reducing Unbalanced Load of Wind Turbine

With the progress and development of socio-economic technology, the contradiction between the strong demand for energy in various industries and the increasing shortage of traditional petrochemicals is deepening. People are increasingly aware of the importance of developing renewable energy, especially the use and development of wind energy. Pitch control is the core technology of wind power generation. At present, most of the mainstream products in the international wind power market apply centralized variable pitch control. The advantage of centralized pitch control is that it has a high wind energy utilization coefficient, which can ensure the maximum power in the low wind speed section, the rated power in the high wind speed section, improve the starting performance and braking performance of the wind turbine, improve the overall flexibility of the wind turbine, Force conditions of small machines and blades. Independent pitch control technology is a control technology method developed in recent years with the continuous increase of fan capacity and the constant increase of impeller diameter.This paper takes the wind energy conversion system of large doubly-fed induction generators as the research object, proposes an independent pitch control strategy, uses FAST and MATLAB / Simulink for dynamic modeling, simulation and comprehensive analysis. The results of simulation experiments show that The unbalanced load of wind turbine units is an effective control method to improve the power supply quality and extend the service life of wind turbine units.