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摘要

随着科技的发展，电力已成为最重要的资源之一，如何保证电力的供应对于国民经济发展和人民生活水平的提高都有非常重要的意义。在电能输送过程中，发电机组是整个过程中最重要的一个基本元素，在电力系统中的输送和分配中被广泛应用。电能在输送过程中损失的大小，是由发电机组所带负荷的大小和其自身的损失以及它是否处于经济运行状态来决定的。故发电机组的运行状态、运行方式的优劣的选择直接影响了整个电力系统的运行和投资。

针对600MW发电机发电机组组继电保护的整定计算及仿真，最初分析初始材料，从而确定了电气主接线，然后进行了短路点的电流计算，再对发电机组自动装置进行配置，并对各个装置进行整定计算，鲜明的突出了各个保护的特点，以求在配置和整定值上满足大机组对保护选择性、灵敏度和可靠性要求。

基于仿真分析，提出了用MATLAB/Simulink软件进行仿真的看法，建立了厂用电快速切换模型，该模型由系统摸块、断路器模块，同步发电机模块、示波器模块等组成。

关键词：发电机组；整定计算；MATLAB；仿真

 

Abstract

With the development of science and technology, electric power has become one of the most important resources. How to ensure the supply of electric power is of great significance to the development of national economy and the improvement of people's living standards. In the process of electric energy transmission, power transformer is one of the most important basic elements in the whole process, and is widely used in the transmission and distribution of power system. The loss of electric energy in the process of transmission is determined by the load of the transformer and its own loss as well as whether it is in the state of economic operation. Therefore, the choice of transformer operation state and operation mode directly affects the operation and investment of the whole power system.

For 550MW generator transformer group relay protection setting calculation and simulation, the initial analysis of the initial material, so as to determine the main electrical wiring, and then the short circuit point of the current calculation, and then the generator set automatic device configuration, and the setting calculation of each device, bright highlights the characteristics of each protection, In order to meet the requirements of protection selectivity, sensitivity and reliability of large units in configuration and setting.

Based on the simulation analysis, the view of using MATLAB/Simulink software for simulation is put forward, and the fast switching model of power supply is established, which is composed of system touch block, circuit breaker module, synchronous generator module, oscilloscope module and so on. The characteristics of voltage before and after bus power failure in the process of fast switching of power supply are simulated. The results show that fast switching is a safe and reliable switching mode, and it is the main switching mode.

Keywords: Generating point unit; Setting calculation; MATLAB; The simulation

 

目录

摘要............................................................................................................................ 1

第一章 绪论............................................................................................................. 1

1.1 概述............................................................................................................ 1

1.2 选题的背景及意义................................................................................... 2

1.3 发电机组的现状....................................................................................... 2

1.4 课题的研究内容及章节安排.................................................................. 4

第二章 600MW发电机组一次设备设计............................................................ 5

2.1 600MW 发电机组一次接线及系统运行方式说明.............................. 5

2.2 发电机组的主要设备参数...................................................................... 5

2.3 发电机组的系统运行方式...................................................................... 6

第三章 600MW发电机组继电保护及自动装置配置....................................... 8

3.1 继电保护配置........................................................................................... 8

3.2 发电机组安全自动装置的配置.............................................................. 8

第四章 600MW发电机组继电保护及自动装置整定原则............................ 10

4.1 比率制动式纵差保护............................................................................. 10

4.2 发电机横差保护..................................................................................... 11

4.3 变压器纵差动保护................................................................................. 11

4.4 发电机反时限对称过负荷保护............................................................ 13

4.5 发电机反时限不对称过负荷保护........................................................ 13

4.6发电机过流保护...................................................................................... 14

4.7发电机过压保护...................................................................................... 15

4.8发电机接地保护...................................................................................... 15

第五章 600MW发电机组继电保护及自动装置整定计算............................ 17

5.1相关参数的计算...................................................................................... 17

5.1.1发电机各主要参数...................................................................... 17

5.1.2电流互感器各主要参数:............................................................. 17

5.1.3变压器各主要参数...................................................................... 17

5.1.4各短路点综合阻抗与短路电流计算......................................... 17

5.2发电机正差动保护.................................................................................. 18

5.3 发电机横差保护..................................................................................... 19

5.4 变压器纵差动保护................................................................................. 20

5.5 发电机反时限对称过负荷保护............................................................ 20

5.6电机反时限不对称过负荷保护............................................................. 21

5.7发电机过流保护...................................................................................... 21

5.8 发电机过压保护..................................................................................... 22

5.9 发电机接地保护..................................................................................... 22

第六章 600MW发电机组继电保护建模仿真................................................. 24

6.1600MW发电机组继电保护建模............................................................ 24

6.2600MW发电机组继电保护仿真分析................................................... 24

第七章  结束语..................................................................................................... 25

参考文献................................................................................................................. 26

致    谢................................................................................................................. 27

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