【作者】 梁祖权；

【导师】 高峰；

【作者基本信息】 昆明理工大学 ， 水利水电工程， 2002， 硕士

【摘要】 随着我国远距离输电系统的不断发展和高压电网的建成及大容量发电机组在电网中不断的投运，如何保持系统稳定、可靠地运行，是一个突出的问题。而发电机励磁系统对电网安全经济运行起着重要的作用，本文对励磁系统的控制方法做了研究，并针对不同的控制方法做了比较。 本文的主要工作和研究成果为： 一、在硬件上实现了接近实际的仿真系统，实现了在线数据采集、发送。 二、在软件上模拟仿真了励磁系统。 三、设计了新的控制方法——Fuzzy-PID方法，并在软件上给以实现。 本文首先用VB编写了励磁控制仿真程序，针对实际可以用该仿真程序仿真六种不同情况下的励磁控制，并用AD／DA板构成接近最实际的硬件系统，直观、便于对实际系统的理解。 由于传统PID励磁控制器不能在线调整参数，同时要求精确数学模型。本文结合模糊逻辑控制，提出了由模糊控制和PID控制结合的励磁调节器，不但实现了对参数的在线调整，而且对大滞后、时变、非线性的复杂系统有良好的控制效果。 通过对一单机—无穷大系统的仿真证明，使用Fuzzy-PID方法控制的励磁系统其动态品质及鲁棒性均优于常规PID控制和线性最优控制。更多还原

【Abstract】 With the developing of the long -distance system foundation of the high voltage power web and the huge generator groups used in power system, how to keep the power system in a stable and reliable state is an essential problem. As the generator excitation system has the important function to the safe and the economic of the power system, this paper puts stress upon the control method of the excitation system and compares the results of the several methods.The main work and the research results are:1. Applying the hardware to realize the simulation system that most like the real one.2. It can make many simulations on this excitation system.3. A new control method 梚s proposed and realized it on software.This paper used the Visual Basic to compile the excitation system, and it can simulate sixth different conditions of the power system. Using two AD/DA card to construct the system, it is directly and is easy for us to realize the real excitation system.As the traditional PID excitation controller can not adjust the parameter on line, and it needs the math model precisely. This paper presents a method for generator excitation system by combining fuzzy control and PID control theory. It can adjust the parameter on line and has the good control result of controlling the delay, time-changed , nonlinear system .Digital simulating result for a single machine-infinite bus power systemIIshow that the dynamic quality of the system is effectively improved by usingFuzzy-PID.更多还原