发布时间 : 星期四 文章3毕业设计正文更新完毕开始阅读2058217851e79b896902260a
基于MATLAB的同步发电机组建模与仿真
摘要
随着电网的规模越来越大，电力系统的运行也随之越来越复杂。同步发电机及其控制系统作为电源是电力系统中的重要组成部分，其性能对电力系统有着极大的影响，直接关系到系统的稳定运行。为了使电力系统安全而经济地运行，我们必须对同步发电机组特性进行深入的研究。而同步发电机组运行是一个相当复杂的过程，其动态特性随着机组的运行状态而不断变化，所以建立机组的模型并进行仿真研究是掌握发电机动态特性，评价其各个控制系统性能的有效手段，并且对工作人员的培训和研究将起到很大的作用。同步发电机组模型的建立将涉及到机组的机理分析，有利于从理论建模中引出新的设计方法，为优化设计提供理论依据。本文将对同步发电机及其励磁系统、调速系统的数学模型进行研究，利用MATLAB/Simulink搭建同步发电机组的仿真模型，建立单机无穷大系统，最后对模型进行仿真，并分析仿真结果。
关键词：电力系统；单机无穷大系统；MATLAB/Simulink；仿真；同步发电机组
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华北电力大学本科毕业设计（论文）摘要
SYNCHRONOUS GENERATOR UNIT MODELING AND SIMULATION
BASED ON MATLAB
Abstract
With the enlargement of the power grid scale, the operation of the power system is becoming more and more complex. As supply unit of the system, synchronous generator and its control system plays an important part in the power system. Their performance also imposes great influence to the power system and has a direct connection with the power system stability. In order to ensure the safe and economic operation of the power system, we shall do a profound research on the synchronous generator unit characteristics. However, the operation of the synchronous generator unit is a extremely complex process. Its dynamic characteristics are subject to the changing states of the unit operation. Therefore, it is efficient to build a unit model and do simulations research to acquire the dynamic characteristics of the unit, and evaluate the performance of each control system. This will also play a great role in the staff training and researches. The building of the synchronous generator unit model will involve the mechanic analysis of the unit, do favor to deduce new designing methods from theoretical model building and provide theoretical basis to the optimization design. In this paper the mathematical model of the synchronous generator and its excitation system, speed regulating system will be researched; the simulation model of synchronous generator unit will be built based on MATLAB/Simulink; a single-unit infinite system will be established; finally simulate the model and verify the accuracy of the model.
Key Words: Power System; Single-unit Infinite System; MATLAB/Simulink; Simulation;
Synchronous Generator Unit
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华北电力大学本科毕业设计（论文）目录
目 录
摘要 ·············································································································· I Abstract ········································································································ II 1 绪论··········································································································· 1 1.1 课题背景和意义 ························································································· 1 1.2 电力系统仿真发展现状 ················································································ 1 1.3 本课题所完成的主要工作 ············································································· 2 2 同步发电机组数学模型 ·················································································· 4 2.1 同步发电机数学模型 ··················································································· 4 2.1.1 同步发电机数学建模概述 ··········································································· 4 2.1.2 同步发电机基本方程 ················································································· 4 2.1.3 同步发电机三阶模型 ················································································· 4 2.1.4 单机无穷大系统 ······················································································· 7 2.2 励磁系统数学模型 ······················································································ 8 2.2.1 同步发电机励磁自动控制系统概述 ······························································· 8 2.2.2 同步发电机励磁自动控制系统数学模型························································· 8 2.3 调速系统数学模型 ···················································································· 10 2.3.1 同步发电机组调速控制系统概述 ································································ 10 2.3.2 同步发电机调速系统数学模型 ··································································· 11 3 基于MATLAB同步发电机组仿真 ·································································· 12 3.1 MATLAB介绍 ·························································································· 12 3.1.1 MATLAB/Simulink ·················································································· 12 3.1.2 常用Simulink库模块 ·············································································· 13 3.2 同步发电机组仿真的初值计算 ····································································· 14 3.3 同步发电机组仿真模型 ·············································································· 15 3.3.1 同步发电机模型 ····················································································· 16 3.3.2 同步发电机励磁自动控制系统仿真模型······················································· 17 3.3.3 同步发电机调速系统仿真模型 ··································································· 18 3.4 系统仿真及结果分析 ················································································· 18 3.4.1 稳定运行 ······························································································ 19 3.4.2 系统电压突增或突降 ··············································································· 20 3.4.3 增加励磁系统给定电压 ············································································ 21 3.4.4 增加调速系统给定功率 ············································································ 23
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华北电力大学本科毕业设计（论文）目录
3.4.5 三相突然短路 ························································································ 24 4 结论与展望 ······························································································· 26 参考文献 ····································································································· 27 致谢 ············································································································ 28
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