水轮机调速器的智能非线性PID控制

INTELLIGENT NONLINEAR PID CONTROL OF HYDRO-TURBINE GOVERNORS

将PID控制、非线性控制、仿人智能控制相结合,提出了一种智能非线性PID控制器,并讨论了其结构和算法。它在大误差时采用强比例、弱积分,小误差时采用弱比例、强积分控制,具有参数自适应和结构自组织的特点。对水轮机控制系统的仿真,智能非线性PID控制器具有响应速度快、超调量小的特点,可有效地改善水轮机调速系统的动态性能和鲁棒性。由于所述控制器的参数调谐和控制策略切换是基于控制误差进行的,因此易于在工程实践中实施。

PID control, nonlinear control and human-emulating intelligence combined, a novel intelligent nonlinear PID controller for hydro-turbine governors is proposed, and its structure and control algorithm are described. It is a parameter adaptive and self configuration controller that adopts larger proportional action and a smaller integral factor for a larger, or smaller proportional action and a larger integral factor for a smaller error. Simulation studies on hydro-turbine governing systems show that the proposed controller has the advantages of short setting time. small overshoot and fast response Moreover, the new controller is easy to be implemented, because its parameter tuning and control strategies' switching are based on the control deviation. So it is easy to be put in practice in the industrial control field.