变速恒频双馈风电机组最大风能捕获非线性控制策略  

Nonlinear Control Strategy of Variable-speed Constant-frequency Wind Turbine Driven Doubly-fed Induction Generator for Maximum Wind Energy Capture

作　　者：田友飞[1] 李啸骢[1] 徐俊华[1] 谷立基[1] 黄梦喜[1] 

机构地区：[1]广西大学电气工程学院,广西壮族自治区南宁市530004

出　　处：《电力系统自动化》2011年第11期27-32,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50747026);广西自然科学基金资助项目(桂科自0728027);南宁市市校科技合作专项(200801029D);北海市市校科技合作专项(北科合200801027)~~

摘　　要：针对变速恒频双馈风电机组,讨论了基于空气动力转矩和风速估计的最大风能捕获问题。在分析了风力机特性和双馈感应发电机基本电磁关系的基础上,建立了变速恒频双馈风电机组非线性数学模型,并运用反馈线性化理论设计了非线性控制器。该控制器具有2个输出变量,即发电机转子侧d轴和q轴电压分量。q轴电压分量用于强迫风力机运行于最优转速,实现最大风能捕获;d轴电压分量用于调节系统的无功功率输出,实现系统铜耗最小化。仿真结果表明了所提出的控制策略的正确性和有效性。The maximum wind energy capture of the variable-speed constant-frequency wind turbine driven doubly-fed induction generator（DFIG） is studied based on aerodynamic torque and wind speed estimation.After an analysis of wind turbine＇s characteristics and basic electromagnetic relationship of DFIG,the nonlinear mathematical model of the wind generation system is established.Then the feedback linearization theory is used to design a nonlinear controller.The nonlinear controller has two output variables： the d-axis and q-axis components of rotor voltage.The q-axis component is used to maximize the wind energy capture by forcing the wind turbine to stay close to the optimal rotor speed.The d-axis component is used to minimize the copper losses by regulating the reactive power of DFIG.Simulation results prove the correctness and feasibility of the proposed control strategy.

关 键 词：最大风能捕获 双馈感应发电机 风电机组 反馈线性化 非线性控制器 

分 类 号：TM315[电气工程—电机]