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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。
In order to solve the problems of non-linearity, time-varying and difficult to accurately model hydraulic turbine generator set, a simple and easy-to-implement nonlinear PID (NLPID) control method is applied to hydroelectric generator set control. The integral behavior of the NLPID controller compensates for various unknowns of the powertrain. The closed-loop stability of control system is proved by constructing Lyapunov function. The simulation results show that the NLPID control law of the turbine generator set has better anti-interference ability and adaptability to the system model uncertainty than the differential geometry method. This method is beneficial to improve the robustness and adaptability of hydro-generator set .