（最新版）4×200MW火力发电厂电气一次部分设计说明书毕业设计

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4×200MW火力发电厂电气一次部分设计

Design of 4x200MW Thermal Power Plant Primary System

学生学号： 学生姓名： 专业班级：电气0902 指导教师： 职 称：讲师

起止日期：2013.3.4～2013.6.17

1

摘 要

由发电、配电、输电、变电和用电等环节组成的电能生产与消费系统。它的功能是将自然界的一次能源通过发电动力装置转化成电能，再经输、变电系统及配电系统将电能供应到各负荷中心。

火力本文主要完成了电气主接线的方案设计及其经济型分析，主要电气设备的选择，包括主变压器的容量计算。在发电厂短路电流计算的基础上，进行配电装置的选型方案的设计。回路。在火力发电厂电气部分设计中，一次回路的设计是主体，它是保证供电可靠性、经济性和电能质量的关键，并直接影响着电气部分的投资。

本文主要完成了电气主接线的方案设计及其经济型分析，主要电气设备的选择，包括主变压器的容量计算。在发电厂短路电流计算的基础上，进行配电装置的选型方案的设计。

关键词：发电厂；电气主接线；电气设备

Abstract

By the power generation, transformation, transmission and distribution of electricity and energy components, and other aspects of production and consumption systems. It is the function of the natural world through the power of primary energy into electrical energy power plant, then lost, transforming the system and distribution system will supply power to the load centers.

Thermal power plant is a establishment about generate electricity and power transform. The electrical equipments in thermal power plant of Primary Equipment is Primary circuit. Primary circuit is the Principle part in Thermal power plant of electrical design. It is the this paper, we completed the program design and economic analysis of the main electrical wiring, major electrical equipment options, including the main transformer capacity calculation . Calculated on the basis of short-circuit current from power plants , power distribution device selection program design .

Key Words：power plant；the main electrical connection；electrical equipment

目 录

摘 要 ········································································································ I Abstract ······································································································· II 第1章 绪 论 ································································································· 1

1.1 电力工业的发展概况 ············································································ 1 1.2 发电厂预设规模 ··················································································· 1 1.3 发电厂接入系统的原则 ········································································· 2 第2章 电气主接线设计 ··················································································· 3

2.1 概述 ·································································································· 3

2.1.1 电气主接线设计的基本要求 ··························································· 3 2.1.2 220kV电压等级常用接线方式 ························································ 3 2.2 拟定可行的主接线方案 ········································································· 4

2.2.1 方案一 ······················································································· 4 2.2.2 方案二 ······················································································· 4 2.2.3 方案的比较与选定 ······································································· 5 2.3 变压器的选型 ······················································································ 5 第3章 火电厂厂用电接线的选择 ······································································· 6

3.1 概述 ·································································································· 6

3.1.1 方案的比较与选定 ······································································· 6 3.1.2 厂用电的电压等级 ······································································· 6 3.1.3 厂用电系统中性点接地方式 ··························································· 6 3.1.4 厂用电源及其引接 ······································································· 8 3.2 厂用电系统的设计及确定 ······································································ 8 3.3 厂用主变选择 ··························································· 错误！未定义书签。

3.3.1 厂用电主变选择原则 ········································· 错误！未定义书签。 3.3.2 厂用主变型号的确定 ········································· 错误！未定义书签。

第4章 短路电流的计算 ················································································· 10

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