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本科生毕业设计（论文） 摘要

本毕业设计是对济宁2×200MW凝汽式火力发电厂电气部分进行初步设计。论文详细的说明了各种设备选择的最基本的要求和原则依据以及计算过程。本设计共分十章，第一章为绪论，第二章负荷计算，第三章为变压器台数和容量的选择，第四章是发电厂电气主接线的选择，主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择。第五章厂用电设计，包括：厂用电接线的总要求、厂用母线接线设计。第六章短路电流计算，是最重要的环节，本书详细的介绍了短路电流计算的目的、条件、一般规定、元件参数的计算、网络变换等知识。第七章电气设备的选择与校验，包括母线、高压断路器、隔离开关、电流互感器、电压互感器的选择原则和要求。第八章简单的介绍了高压配电装置的设计原则、要求和220KV的配电装置。第九章全厂继电保护和自动装置规划设计，包括总则、自动装置、一般规定和发电机、变压器、母线等设备的保护。第十章发电厂的防雷保护，包括选择的基本原则、避雷针和避雷器的设计。此外，在适当的位置附加了图纸（主接线图、平面图、断面图）。

关键词：电力系统、母线、高压断路器、隔离开关、电压互感器 I

本科生毕业设计（论文）

The design of graduation Jining 2 x 200 MW steam-electric power plant for the preliminary design. Papers detailed description of the various types of equipment to choose the most basic requirements and principles and the basis for calculation. The design is divided into 10 chapters, the first of introduction, the second chapter load calculation, the third chapter of transformer capacity and the number of Taiwan’s choice Chapter IV power plant is the main electrical connection options, mainly on the electrical wiring of the importance of design basis, basic requirements, Wiring various forms of the main advantages and disadvantages of wiring options. Chapter V power plant design, including : electricity wiring plant to the general requirement of

plants used bus wiring design. Chapter VI of short-circuit current, is the most important part of the book provides detailed descriptions of the short-circuit current calculation purposes, conditions, general rule, the device parameters, such as knowledge of network transformation. Chapter VII of electrical equipment and checking, including bus, high pressure circuit breakers, isolation switches, CT, The choice of voltage transformer principles and requirements. Chapter VIII simple introduction to the high-voltage power distribution equipment design principles, requirements, and the 220 KV power distribution devices. Chapter IX plant protection and automatic device design, including general principles, automatic installation, general provisions and generators, transformers, busbar protection equipment. Chapter 10 power plants lightning protection, including the selection of basic principles, and a lightning arrester design. In addition, at a suitable location attached drawings (main wiring maps, graphs, maps section).

Key words : power system, bus, HV circuit breakers, isolation switches, voltage transformer II

本科生毕业设计（论文） 目录

摘要 ............................................................................................................................. I 目录 ........................................................................................................................ III 第1章 绪论 ............................................................................................................ 1 第2章 负荷计算 .................................................................................................... 2 2.1厂用负荷表 ................................................................................................ 2 2.2 负荷计算 ................................................................................................... 4 第3章 变压器的台数与容量的选择 .................................................................... 6 3.1 主变压器的确定 ....................................................................................... 6 3.1.1 主变压器容量及台数的确定 ........................................................ 6 3.1.2 主变压器型式的选择 .................................................................... 6 3.2 容量选择 ................................................................................................... 7 第4章 电气主接线的选择 .................................................................................. 10 4.1 电气主接线的设计原则 ......................................................................... 10 4.1.1 主接线的设计依据 ...................................................................... 10 4.1.2 主接线设计的基本设计 .............................................................. 11

4.2 设计方案 ................................................................................................. 12 4.2.1 220KV侧设计方案 ....................................................................... 12 4.2.2 高压厂用侧设计方案 .................................................................. 13

第5章 厂用电接线 ............................................................................................ 15 5.1 厂用电接线总的要求 ............................................................................. 15 5.2 厂用电接线设计方案 ............................................................................. 15 第6章 短路电流计算 .......................................................................................... 17 6.1 短路电流计算的目的： ......................................................................... 17 6.2 短路的原因和短路的定义 ..................................................................... 17 6.3 短路和种类 ............................................................................................. 17 6.4 电力系统短路电流的计算条件 ............................................................. 18 6.5 短路电流的计算步骤 ............................................................................. 18 第7章 电气设备的选择 ...................................................................................... 22 7.1 电气设备选择的一般原则 ..................................................................... 22 III

本科生毕业设计（论文）

7.2 高压断路器的选择 ................................................................................. 22 7.3 高压隔离开关的选择 ............................................................................. 25 7.4 电流互感器的选择 ................................................................................. 26 7.5 电压互感器的选择 ................................................................................. 28 7.6高压开关柜的选择 .................................................................................. 29 7.7 母线的选择 ............................................................................................. 31 第8章 高压配电装置规划设计 .......................................................................... 36 8.1 高压配电装置规划设计的一般原则 ..................................................... 36 8.2 设计要求 ................................................................................................. 36 8.3 配电装置 ................................................................................................. 36 8.4 设备配置 ................................................................................................. 37 8.5 本厂采用的配电装置 ............................................................................. 38 第9章 全厂继电保护和自动装置规划设计 ...................................................... 40 9.1 总则 ......................................................................................................... 40 9.2 一般规定 ................................................................................................. 40 9.3 发电机变压器组保护 ............................................................................. 41 9.3.1 发电机保护 .................................................................................. 41 9.3.2 主变保护 ...................................................................................... 41 9.3.3 变压器相间短路的后备保护 ...................................................... 42 9.3.4 变压器接地短路后备保护 .......................................................... 43 9.3.5 变压器过负荷保护 ...................................................................... 43 9.3.6 变压器瓦斯保护 .......................................................................... 43 9.4 母线保护 ................................................................................................. 44 9.5 线路保护 ................................................................................................. 45