基于无源性理论的风力机最大风能捕获控制

MAXIMUN WIND ENERGY CAPTURE CONTROL WITH PASSIVITY-BASED THEORY

讨论了具有随机性风速变化和非线性的风电系统的最大风能捕获控制问题,系统采用基于无源性控制方案下的浆距角和触发角双输入控制方案,通过选择适当的状态稳态特性和注入阻尼的方法,将风能的最大捕获与系统的全局稳定性相结合,设计出了一种对风速变化和参数摄动具有鲁棒性且使风电系统具有良好动态特性的控制系统。仿真结果显示,对于具有随机性风速变化和变参数风电系统,该控制策略可以实现风能的最大捕获。

A nonlinear feedback controller for maximum wind energy capture of wind energy conversion system (WECS) with passivity^based control (PBC) principle has been designed using pitch angle control of the blades and delay angle control of the rectifier.The reference (steady^state) behaviors for all state variables were defined according to the dynamics of WECS and maximum wind energy capture.The dynamics of WECS was improved by injecting damp.The best advantage of feedback controller by PBC is the global stability and robust to the variation of wind velocity and parameters.Some simulation results illustrate the performance of the PBC system.