双馈风力发电机组转子侧控制策略改进  

An improved rotor-side control strategy of double-fed wind turbine generation system

作　　者：胡雪松[1] 孙才新[1] 李辉[1] 赵猛[1] 唐显虎 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室,重庆大学,重庆400044 [2]重庆前卫仪表厂风电控制设备分公司,重庆401121

出　　处：《重庆大学学报（自然科学版）》2010年第8期58-63,共6页Journal of Chongqing University

基　　金：重庆市科技攻关计划项目(CSTC;2008AB3050);教育部留学回国人员启动基金资助项目(2008-890-2);重庆市自然科学基金资助项目资助项目(CSTC2008BB6038)

摘　　要：基于现场风电机组功率转速曲线,对双馈风电机组常规功率控制策略的不足进行了分析,考虑机组转速限制条件和功率快速跟踪控制要求,对双馈风电机组转子侧变流器功率解耦控制策略以及变桨控制策略进行了改进,即转子侧有功控制环采用风力机输出转矩直接控制,并加转速外环实现对转速的准确控制;变桨控制策略采用直接功率控制。最后,应用提出的改进控制策略对双馈风电机组全程运行性能进行了仿真,并和常规控制策略进行了比较。结果验证了控制策略改进的有效性和正确性。Based on a on-site wind turbine’s output active-power vs. generator speed curve, the shortage of conventional power control strategies of doubly-fed wind turbine generation system are analyzed. Considering the generator speed restriction and active-power fast-track control requirement, the power decoupling control strategy in the rotor-side converter and variable pitch control strategy are improved, that is, an output mechanical torque of wind turbine and the generator speed of DFIG are used in the rotor-side active power control loop in order to achieve an accurate optimal speed control, as well as a direct active-power control method is also adopted in the variable pitch control strategy. Finally, the overall operational performances of DFIG wind turbine generation system using the proposed control strategies are simulated, and also compared with the conventional control strategies. The results show that the improved control strategy is more valid and correct.

关 键 词：风力发电 风力机 双馈发电机 最大风能捕获 变桨控制 

分 类 号：TM614[电气工程—电力系统及自动化]