摘要
针对具有极大不确定性的变速风力发电机组,提出了一种全局快速Terminal滑模控制方法。滑模模态由Terminal滑动模态和线性滑动模态组成,以保证状态在有限时间内收敛并同时提高收敛速度。设计了系统不确定项的边界估计算法。运用Lya-punov稳定性理论证明了系统稳定性。对自然风和风速突变下的机组运行情况进行了仿真,其结果表明系统稳定,并具有较好的动态性能和较强的抗扰能力。
In this paper,a global fast terminal sliding mode control method is proposed for variable-speed wind turbines with great uncertainties.The sliding mode is composed of Terminal sliding mode and linear sliding mode,to ensure that the system states converge in finite time and increase convergence rate.To this end,an estimation algorithm is designed to estimate the bound of system uncertainties.The system stability is proved by using Lyapunov stability theorem.In the simulation,the wind turbines operate in the cases of natural wind and the wind speed mutation.The simulation results verify that the system is stable and has good dynamic performance and strong anti-interference ability.
出处
《电气自动化》
2013年第3期51-53,共3页
Electrical Automation
