具有多性能指标的汽轮发电机非线性综合控制

提出了一种多指标非线性控制设计方法，该方法通过将输出函数选取为多状态量的线性组合来实现非线性系统的多性能指标控制，从而可在统一的非线性控制设计框架下同时对系统中多个状态量的性能指标提出要求，并可在系统的动态性能和静态性能间进行很好的协调。将所提出的多指标非线性控制设计方法应用于汽轮发电机组的励磁、调速综合控制中，成功地解决了汽轮发电机非线性综合控制中的动、静态性能的综合协调问题。将所设计的汽轮发电机多指标非线性综合控制律用于单机无穷大电力系统的同步发电机组中进行仿真实验，结果表明所提出的控制律不仅能明显地提高发电机的动态稳定性，而且能准确地将发电机的端电压Uf和输出电磁功率Pe控制在其给定值上运行，不会因受扰而发生偏移。这表明所提出的控制律能很好地协调系统的动、静态性能。

MULTI-INDEX NONLINEAR INTEGRATED CONTROL FOR TURBINE GENERATOR UNIT

A novel scheme for design of multi-index nonlinear control is proposed in this paper. With this scheme, the performance indexes for various state variables of a control system can be coordinated satisfactorily in a unitary nonlinear control framework via selected the output functions as the combination of multiple state variables.Appling the proposed control scheme in the design of the turbogenerator integrated controller, a multi-index nonlinear integrated controller for turbine generator units is proposed, in which the problem to coordinate the dynamic and steady-state integrated performances of various state variables is solved. Simulation results of using the proposed controller in a one-machine infinite-bus power system show that both the dynamic performances and the steady-state performance of the synchronous generator units are greatly improved. Both the generator terminal voltage and the generator active power output can still be kept at their setting values after a step disturbance. Also, the stability of the generator unit when subjected to the disturbances is greatly enhanced. The proposed controller is valuable for industrial application.