采用叶尖速比法和爬山搜索法相结合的风力发电系统最大功率点跟踪研究  

Maximum power tracking of wind power generation system using the combination of tip speed ratio method and climbing search method

作　　者：李咸善[1] 徐浩[1] 杜于龙 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电力系统保护与控制》2015年第13期66-71,共6页Power System Protection and Control

基　　金：国家自然科学基金项目(51277110)~~

摘　　要：在风力发电机控制中采用叶尖速比法,可以实现快速功率跟踪,但常由于风速测量值与实际风速值不一致,导致无法达到最大功率点。由于爬山搜索法不需要测量风速,所以采用爬山搜索法和叶尖速比控制法相结合来实现快速最大功率跟踪。当风速变化超过±1 m/s时,采用叶尖速比控制法,按测量风速计算出参考转速,迅速跟随,达到指定转速后,切换到爬山搜索法,实现精确的最大功率跟踪。在Matlab环境下,建立了永磁直驱式风力发电机模型,仿真分析了风速变化时,采用叶尖速比法和爬山搜索法相结合的方法能够实现最大功率快速而精确的跟踪,且具有很好的动态特性和稳态特性。The tip speed ratio method can realize fast power tracking in the process of wind turbine controlling. However, the inconsistency of wind speed between the measured value and the actual value lead unable to achieve maximum power point frequently. Because the climbing search method does not require the measurement of wind speed, the combination of tip speed ratio method and climbing search method is adopted to realize fast maximum power tracking. When wind speed exceed ±lm/s, this paper calculates reference speed according to measured wind speed by use of tip speed ratio control method, and then follows quickly. When wind speed reaches the specified speed, it switches to climbing search method to realize accurate maximum power tracking. In the Matlab environment, the Direct Drive Permanent Magnet Wind Generator model is established, which can simulate that, when the wind speed changes, the combination of tip speed ratio method and climbing search method can realized fast and accurate maximum power tracking, and has a dynamic characteristics and steady-state characteristics.

关 键 词：永磁直驱式风力发电机 叶尖速比法 爬山搜索法:最大功率跟踪 仿真 

分 类 号：TM614[电气工程—电力系统及自动化]