摘要当今社会，电力系统技术日新月异，发电机的单机容量不断扩大，发电机在系统中的作用也愈发重要。对于电力系统来说，发电机的可靠运行对系统的正常工作和电能的质量有着极其重要的影响。82675

由于大型发电机组普遍采取的是三相分相操作方式，所以为了能更好地保护发电机及电力系统的运行安全，需要重点分析研究发电机非全相运行的情况，获取并整合非全相故障的信息，这已经成为发电厂电气运行的重点研究内容。本文对几种常见的非全相运行情况进行了理论分析，通过对称分量法求出各相、各序电流以及相序电流之间的关系；通过MATLAB软件中的Simulink模块，搭建各种非全相故障类型的仿真模型来进行仿真，并将仿真结果与理论分析进行对照，互相验证正确性。最后针对发电机非全相保护存在的问题提出了改进方法，对发电机装设出口断路器情况下的非全相运行进行仿真，提出了处理措施。

毕业论文关键词  发电机  非全相运行  MATLAB仿真  事故处理

毕业设计说明书外文摘要

Title    The analysis of the influence of the open-phase  operation of the generator                       

Abstract In this modern society, the power system is developing day by day, the capacity of a single generator is keeping increasing and the generator is more and more important in electric power system, so reliability and safety of the generator have an important influence on the normal work of electric system and the quality of electric energy。

Because large generator usually use three-phase split-phase operation, the study on open-phase operation and the analyses of extracted fault information are of great value to the safety of generator and the operation of power system, and have been the emphasis of electrical operation of power station。 In this thesis，the normal form of open-phase operation in large power unit is analyzed  with the of symmetrical component method。 The normal form of open-phase operation in large power unit is studied respectively by MATLAB simulation。 At last, the problems with open-phase protection is discussed，and the improved scheme of protection is presented．Also, the corresponsive solutions of open-phase operation accident are analyzed and presented．

Keywords  generator  open-phase operation  MATLAB simulation  solutions

目    次

1  引言 1

1。1  课题研究背景及意义 1

1。2  研究现状 1

1。3  本文主要工作 2

2  大型汽轮发电机组非全相运行的理论分析 3

2。1  对称分量法 3

2。2  发电机非全相运行的类型 4

2。3  发电机非全相运行的原因 6

2。4  各种情况下非全相运行的一般理论 7

2。5  本章小结 13

3  大型汽轮发电机组非全相运行仿真 14

3。1  MATLAB简介 14

3。2  基于MATLAB的发电机组非全相运行仿真研究 15

3。3  发变组高压侧出口断路器非同期分闸 17

3。4  发变组高压侧出口断路器非同期合闸