非线性状态PI汽门控制器的研究

The Research on Nonlinear State PI Valve Controller

针对电力系统的强非线性和不确定性，设计了非线性状态PI汽门控制器。直接对其不确定对象进行设计，避免了反馈线性化非线性汽门控制由于数学模型的误差而影响控制器性能的缺点。所得的控制规律与系统运行点和网络结构完全无关，同时控制器本身结构简单，仅需发电机局部信息，易于在多机系统中实现分散协调控制。仿真计算表明，非线性状态PI汽门控制器能有效地提高系统的暂态稳定性。

As for the strong nonlinear and uncertain characteris tic of the power system, the nonlinear state PI valve controller is proposed in this paper. The controller is designed for the uncertain model object and the sh ortcoming of feedback linearization nonlinear valve controller, which its perfor mance is affected by the mathematical model error, is avoided. The control law i s completely independent on the operation condition and the net structure of the power system. The controller structure is simple and only local information of generator is needed. The decentralized valve controller can be accomplished easi ly. The simulation suggests that the nonlinear state PI valve controller is sati sfied for improvement of power system.