摘要同步发电机励磁控制器是电力系统中重要的控制装置，研究励磁控制器设计具有理论意义与工程应用价值。本文首先介绍了目前励磁控制的发展概况；然后根据目前较为成熟的最优控制理论，设计了线性最优励磁控制器；考虑到电力系统的非线性特性，利用直接反馈线性化的方法设计了非线性最优励磁控制器，缩小了运行点偏离稳定平衡点时的误差；最后基于Lyapunov函数方法对包含零动态的部分线性化设计了切换励磁控制器，这种控制器可以综合考虑线性化后零动态系统对稳定性的影响，在系统受到大扰动时更好地抑制非线性部分的作用。利用MATLAB对电力系统稳定控制进行编程，仿真建模校验所设计控制器的控制效益，证明非线性最优切换控制器拥有更好的调节特性。65100

毕业论文关键词  励磁控制  最优控制  切换控制  零动态

毕业设计说明书（论文）外文摘要

Title    Research on excitation control method of generator                  

Abstract

The excitation controller of synchronous generator is an important control device of the power system,so the research of excitation control method has both the theory significance and engineering application value.This paper firstly introduces the development of the current excitation control methods.Then,based on the mature theory of optimum control,we design the linear optimal excitation controller.Considering the power system is a nonlinear dynamic one,the controller designed by using the literalized model may be not effective while the state point of the power system is away from the equilibrium point.So the energy function and the feedback linearization of the system are introduced into the design of nonlinear optimal excitation controller.Finally,by using the Lyapunov function method,a switched optimal excitation controller is designed for the partial linearized power system with zero dynamics．This controller can  suppress the nonlinear part of the system better under big disturbance. We program the excitation controller of the power system by using MATLAB  to check the control benefit of the designed controller.Simulation results on MATLAB for the power system prove that the proposed switched nonlinear optimal excitation controller has better regulation performance．

Keywords  excitation control;optimum control;switched control;zero dynamics

目次

1  概述 1

1.1  研究背景 1

1.2  励磁控制方法的研究现状 1

1.3  研究内容 4

2  最优励磁控制器设计 4

2.1  最优控制原理 5

2.2  线性最优励磁控制器 7

2.3  非线性最优励磁控制器 11

2.4  最优励磁控制器设计实例 12

3  切换控制的应用 18

3.1  切换控制理论 18

3.2  零动态 19

3.3  非线性切换励磁控制器 20

3.4  非线性最优切换励磁控制器设计实例 22

4  仿真试验 23

4.1  静态稳定仿真 24

4.2  暂态稳定仿真