摘要
变速风力发电机组通常采用转速控制和变桨距控制相结合的方法,在额定风速以下主要调节发电机的转矩使转速跟随风速变化而变化,以获得最佳叶尖速比;在额定风速以上通过调整桨叶节距,改变气流对叶片攻角,从而改变风力发电机组获得的空气动力转矩,才能使功率输出保持稳定。传统PID控制方案在风电控制中仍然发挥重要的作用,先进的控制算法与传统控制相结合将是风电控制的主流。在转速控制环中采用积分分离PID控制,在变桨距控制中采用参数自适应PID控制。仿真结果表明,控制方法分别在各自控制环中发挥良好的效果,相比常规PID控制,超调量明显减小,调节时间缩短,动态响应快。
The problem of Variable speed aerogenerator using the a combine strategy of rotation speed control and pitch control is studied.The motor speed could become dependent on wind speed and achieve optimal tip-speed ratio by changing the torque of the generator when the actual wind speed is lower than rated speed.On the other hand,by configuring blade pitch when the actual wind speed is higher than rated speed.Traditional PID control is still a common control strategy in this system but the combination of advanced control algorithm and traditional control strategy would become the main control method in the future.The integral separation PID control is used in rotation speed control loop and the parameter self-adapting PID control in blade pitch control loop.Simulation result shows that the proposed strategy performs well in each control loop.Comparing with normal PID technique,the proposed method reduces overshooting greatly,shortens regulation time and accelerates dynamic response.
出处
《控制工程》
CSCD
北大核心
2011年第4期592-595,共4页
Control Engineering of China
基金
江苏省科技支撑计划项目(BE2009166)
关键词
变速风力发电机
积分分离
参数自适应控制
variable speed wind generation
integral abruption
parameter adaptive control
