基于快速终端滑模的永磁同步发电机控制研究

A Study on the Control of the Permanent Magnet Synchronous Generator Based on the Fast Terminal Sliding Mode

以永磁同步风力发电机为研究对象,首先对风力发电机进行数学建模,推导出风力发电机的状态空间表达式。其次结合终端滑模与线性滑模的优点,设计了一种快速终端滑模面,从而使系统具有全局快速收敛的能力,并在此基础上施加了负载观测器削弱抖阵。最后通过仿真验证控制策略可以较快地跟踪参考速度,且具有较好的鲁棒性和抗干扰性。

The permanent magnet synchronous wind power generator is chosen as the research object. First, the state space expression of the wind power generator is deduced through mathematical modeling. Then, a fast terminal sliding mode surface is designed by combining the advantages of the terminal sliding mode and the linear sliding mode, so that the system may have the ability of global fast convergence. On that base, a load observer is applied to weaken the shaking array. Finally, the simulation result shows that the control strategy can rapidly track the reference speed and has good robustness and anti-interference.