非线性最优和PID结合的风机变桨距研究

摘要

for the nonlinear and large inertia of the direct drive permanent magnet wind power generation system, when it deviates from the system operating point or the system is subjected to large disturbance, if still using pitch controller based on PID variable pitch, there will be large error or even oscillation. To this end, the control performance can be improved when using the nonlinear optimal control regulator to control the system.However ,as for inertia system , the?nonlinear?optimal? control has the disadvantage that the serious hysteresis phenomenon will occur.Therefore, a new variable pitch controller design method based on ant colony optimization algorithm is proposed, which combines the PID and nonlinear optimal control to achieve the effective control of the generator set. The results show that the method is effective and reliable.%对于非线性、大惯性的永磁直驱风力发电系统而言,当它偏离系统工作点或系统受到较大扰动时,如果仍然采用基于PID技术的变桨距控制器,就会出现较大误差甚至振荡.为此,对其采用非线性最优控制控制器进行代替可以获得控制性能的改善.但是,非线性最优控制调节器存在着对大惯性系统控制严重滞后的缺点.所以,提出一种通过蚁群算法优化,将PID和非线性最优控制结合的新型变桨距控制器的设计原理,从而实现对发电机组有效的控制.结果表明:该方法是有效的、可靠的.