变速风力发电机组自适应模糊控制技术  

Adaptive Fuzzy Logic Control Technique for Variable-speed Wind Turbines

作　　者：陈家伟[1] 陈杰[1] 陈冉[1] 陈志辉[1] 龚春英[1] 严仰光[1] 

机构地区：[1]航空电源航空科技重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2011年第21期93-101,共9页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2007CB210303)~~

摘　　要：针对采用传统模糊控制技术的变速风力发电机组难以兼顾机组转速控制性能和输出电流脉动的缺点,提出了一种简单的自适应模糊控制方法。该方法通过设置具有自适应能力的转速误差门限来判断风力发电机组的运行状态,从而实时的改变模糊控制器的输出比例因子,达到良好的控制效果。研制了一套额定功率为2 kW的定桨距变速风力发电机组仿真和实验系统。在此平台上分别对常规的PID控制、传统的模糊控制和提出的自适应模糊控制技术进行了仿真与实验分析。结果显示,提出的自适应模糊控制技术不仅对参数变化具有较强的鲁棒性、可实现良好的动静态转速控制,且能够有效减小输出电流脉动,从而减小机组转矩脉动和机械应力,延长机组使用寿命。Fuzzy-logic-based algorithms are widely employed in variable-speed wind turbines. However, these methods result in a compromise between the speed-control performance and the output current ripple of the wind turbines. Thus, a simple self-tuning fuzzy logic control algorithm, in which a self-tuning error threshold was used to determine the operational conditions of the wind turbine and then change the scaling factor of the fuzzy logic controller, was proposed. Simulation and experimental results performed by a 2 kW fixed-pitch variable-speed wind turbine simulation model and experimental platform respectively indicated that, compared with the PID control method and the conventional fuzzy-logic-algorithms, the proposed method not only had the merits of strong robustness to parameter variations and excellent static and dynamic speed-control performance, but also could get a ripple-free output current and torque with the service life of the turbine remarkably increased.

关 键 词：风力发电 模糊控制 自适应 误差门限 电流脉动 

分 类 号：TM315[电气工程—电机]