水平轴失速型风力机主动非线性控制

讨论了大型主动失速型风力机在额定工况以上时的主动非线性控制问题。直接利用所推导的仿射性非线性模型．采用微分几何精确线性化理论,实现恒速风力机全局精确线性化控制,给出了反馈控制算法,并对闭环系统进行了数字仿真。

ACTIVE NONLINEAR CONTROL OF THE STALL HORIZONTAL WIND TURBINE SYSTEM

This paper presents the active nonlinear controller design of a stall wind turbine system in above rated wind speed which uses pitch angle control of the blades, with special emphasis on the differential geometric theory. The old stall unit maintains the constant output with the blade stall at the large attack angle. The new MW stall unit fulfills this object with active stall technology, which regulates the pitch angle at Above-Rated operation point. The wind turbine system has typical nonlinear factor with stochastic disturbance. A nonlinear system can be described as a new linear system with the coordinates transformations in differential geometry theory. First, nonlinear theoretical model of the fixed speed wind turbine was built in with the physical meanings. Then, the nonlinear model was linearized globally with differential geometry transmission and a new linear model was gotten. Finally, a nonlinear controller is designed relying on the base of linear quadratic optimal algorithm of the new linear system.