基于动态矩阵控制的同步发电机励磁控制

Synchronous Generator Excitation Control Based on Dynamic Matrix Control

针对影响电力系统稳定性的重要因素,为了解决现代控制理论对被控对象精确数学模型的过分依赖问题,克服实际工业过程中经常出现的非线性、时变性、不确定性和发电机非线性控制中选单状态变量作为输出函数时出现的静态偏移等问题,以及避免传统意义下全局优化的缺陷,针对陆上发电机单机无穷大系统,将系统方程线性化、偏差化后,以主发电机励磁绕组电压的偏差为输入量,以有功功率偏差、角速度偏差和端电压偏差为输出量,基于MATLAB仿真环境搭建了发电机的三阶实用模型。将动态矩阵控制算法应用于同步发电机励磁控制系统中,分别针对不同的扰动对系统进行了仿真,仿真结果表明,所设计的控制器在不同的扰动下都比线性最优励磁控制器具有更强的抗扰能力和更好的稳压性能。

In view of the important factors that influence the stability of power system,in order to solve the problem that the modern control theory’ s much too relying on the accurate mathematical model of the controlled object,overcome the problems of the non-linear,non-stationary,uncertainty that often appear in the actual industrial process and the static migration appears in the generator non linear control when choosing single state variable as the output function,and avoid the defects of global optimization under traditional sense,The system equations of the land generator’ s single machine infinite system are linearized and deviated,the voltage’ s deviation of the main generator exciting winding is served as the input variable,while the deviations of active power,angular velocity and terminal voltage are served as the output variables,the third-order practical model of the generator is established based on MATLAB simulation environment.The dynamic matrix control(DMC) algorithm is applied to the synchronous generator excitation control system,and simulation experiments under different disturbances are illustrated to show that the designed controller has a stronger disturbance rejection and a better performance on voltage regulation than those of linear optimal excitation controller(LOEC).