变转速风力机额定风速以上的非线性控制 ——恒功率输出控制问题

Nonlinear Control of a Variable Speed WT System on ARWS ——Power Limitation Problem

中文关键词  变转速风机系统  微分几何理论  全局线性化

英文关键词  variable speed wind turbine system  differential geometry theory  global linearization

中文摘要

      讨论了在额定风速以上时变转速风力机的控制问题，系统采用基于微分几何理论下的桨距角和触发角双输入控制，变转速风机是一个带有大范围风速的多输入多输出非线性系统，通过坐标变换，使非线性系统转化为一个标准的线性系统．直接利用所推导的仿射非线性机理模型，在额定风速以上，采用微分几何精确线性化理论，通过坐标转换，实现变转速风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

英文摘要

      This paper addresses the control problem of a variable speed wind turbine system in above rated wind speed whuch uses pitch angle control of the blades and delay angle control of the rectifier.with special emphasis on the differential geo-metric theory.Wind turbine system has typical nonlinear factor with stochastic disturbance.A nonlinear system can be described by a new linear system with the differentialgeometry coordinates transformations.ln this paper,first,the nonlinear theoretical model of the variable speed WT system is built in.Then,the nonlinear modelis linearized globally by differential geometry trans-mission and a new linear model is obtained.The nonlinear model can be described as a new linear system.Finally,a nonlinear controller is designed relying on the base of Linear quadratic optimal algorithm of the new linear system.