摘要
功率最大追踪一直作为直驱式永磁同步风力发电系统的核心控制技术。基于风力机功率输出特性曲线,分析了风力机的工作过程及在不同风速下对应的控制策略。在额定风速以下时设计了利用转速外环和电流内环相结合的双闭环控制,并结合空间矢量脉宽调制(SVPWM)技术的风力机变速控制方案;在额定风速时设计了利用模糊-PID复合控制器控制的变桨距控制方案。基于Matlab软件对设计的系统进行理论仿真验证,仿真结果证明所设计功率最大追踪控制策略具有良好的稳态和动态性能。
Maximum power tracking has been used as a core control technology for direct-drive permanent magnet synchronous wind power system. This paper analyses the working process of wind turbine and the corresponding control strategies under different wind speeds, which are based on output-power characteristic curve of the wind turbine. For the situation below rated wind speed, a double-loop control is designed combining the speed outer-loop with current inner-loop, and speed wind turbine control program is proposed based on space vector pulse width modulation （SVPWM） technology. The Fuzzy-PID composite controller controlled variable-pitch control program is used in the case of rated wind speed. At the same time, simulation for the designed system is carded out using Matlab software. Simulation results verify that the proposed maximum power tracking strategy has good stability and dynamic performance.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第22期83-87,93,共6页
Power System Protection and Control
基金
国家自然科学基金资助项目(51167011)
内蒙古自治区自然科学基金资助(2010MS0905)~~
关键词
风力发电
永磁直驱同步发电机
功率最大追踪
模糊-PID控制
wind power generation
direct-driven permanent magnet synchronous generators
power maximum point tracking
Fuzzy-PID control
