水轮发电机组的非线性PID控制

Nonlinear PID control for hydroturbine generator set

为解决水轮发电机组的非线性、时变性和难以精确建模等问题,将一种简单且易于实现的非线性PID(NLPID)控制方法应用到水轮发电机组控制中。NLPID控制器包含的积分行为可以补偿动力系统的各种未知因素。通过构造Lyapunov函数证明了控制系统的闭环稳定性。仿真结果表明:所设计的水轮机发电机组NLPID控制律的抗干扰能力和对系统模型不确定性的适应能力均优于微分几何方法;该方法有利于提高水轮发电机组的鲁棒性和适应性。

A simple and easy-to-realize nonlinear PID NLPID control method was developed for a hydroturbine generator set to handle the non-linearity, time variability, and uncertainty of plant controls. The NLPID controller includes integral control which compensates for the unknown system dynamics. The closed loop system proved to be asymptotically stable using Lyapunov functions. Simulation results show that the NLPID is superior to differential control in resisting external disturbances and adapting to system uncertainties. The NLPID control method very effectively improves the hydroturbine generator set stability and adaptability.