毕 业 设 计(论文)

题 目 110kV变电站电气一次系统设计

系 别 专业班级 学生姓名 指导教师

电力工程系 电气专业#####班 ###### ######

二○一三年六月

华北电力大学科技学院本科毕业设计（论文）

110kV变电站电气一次系统设计

摘 要

随着我国科学技术的发展，特别是计算机技术的进步，电力系统对变电站的要求也越来越高。人们对电能的依赖程度的也不断加强，社会生产和生活对电能供应的质量和管理提出了越来越高的要求。为了保证供配电要求，供电系统的设计要越来越全面、系统，而供电系统的核心部分是变电所，因此设计和建造一个安全、经济的变电所是极为重要的。

本设计讨论的是 110KV 变电站电气部分的设计。本变电站设计除了注重变电站设计的基本计算外，对于主接线的选择与论证等都作了充分的说明，其主要内容包括：变电站主接线方案的选择，进出线的选择；变电站主变压器台数、容量和型式的确定；短路点的确定与短路电流的计算，电气设备的选择（断路器，隔离开关，电压互感器，电流互感器，避雷器）；配电装置设计和总平面布置；防雷保护与接地系统的设计。本次设计论文是以我国现行的各有关规范规程等技术标准为依据，所设计的是一次初步设计，根据任务书提供原始资料，参照有关资料及书籍，对各种方案进行比较而得出。文中介绍的110kV变电站的设计方法、思路及新技术的应用可以作为相关设计的理论指导。

关键字：变电站；短路计算；电气主接线；配电装置

I

华北电力大学科技学院本科毕业设计（论文）

A DESIGN OF ELETRIC SYSTEM

FOR 110kV TERMINAL TRANSFORMER

SUBSTATION

Abstract

With the development of science and technology in China, particularly computing technology has advanced, social production and is it put forward high request more and more to quality and management that electric energy supply to live. In order to guarantee the power supply requirements,the design of the power supply system should become more and more completely and systematic. Because the power supply system，s hard core is a transformer substation, designing and constructing a security and economical transformer substation is great importance.

The design is refer to the part of 110kV electrical substation de sign. Besides paying attention to basic calculation of design for transformer substation, the design makes satisfying narration toward choice and argumentation of main connection. The main content of this design include the choice of main connection for transformer substation; the choice of pass in and out line; the certainty of number, capacitance and model for main transformer; the certainty of short circuit points and calculation of short circuit; the choice electric equipment(breaker, insulate switch, voltage mutual-inductance implement, current mutual-inductance implement, arrester); the design for distribution and disposal for chief plane; the design for lightning proof protection and earth system. This basis of the design is our country present technical standards and each related standard regulations and so on, designs is a preliminary design, provides the firsthand information according to the project description, the reference pertinent data and the books, carries on the comparison to each kind of plan to obtain.The text introduces the design method on way of thinking and new technique of the 220 kV substations which can be the theories of related design.

Keywords: Substation；Short Circuit Calculation；Electrical main wiring; supply and

distribution electricity

II

华北电力大学科技学院本科毕业设计（论文）

目录

摘 要 ....................................................................... I Abstract ................................................................... II 1 前言 ...................................................................... 1 2 变电站电气主接线设计 ...................................................... 2 2.1 主接线设计的基本要求 .................................................... 2 2.1.1 可靠性 ................................................................ 2 2.1.2 灵活性 ................................................................ 2 2.1.3 经济性 ................................................................ 2 2.2 主接线方案的选择、比较、确定 ............................................ 3 2.2.1 对原始资料的分析 ...................................................... 3 2.2.2主接线方案初步拟定 .................................................... 3 3 主变压器的选择 ............................................................ 7 3.1 主变压器选择的规定 ...................................................... 7 3.2 主变器选择的一般原则与步骤 .............................................. 7 3.2.1 主变台数的确定原则 .................................................... 7 3.2.2 主变形式的选择原则 .................................................... 7 3.2.3 主变容量的确定原则 .................................................... 7 3.3 主变压器的计算与选择 .................................................... 8 3.3.1容量计算 .............................................................. 8 3.3.2主变型号选择 .......................................................... 8 4 短路电流计算 ............................................................. 10 4.1 短路计算的目的及假设 ................................................... 10 4.1.1 短路电流计算的目的 ................................................... 10 4.1.2 短路电流计算的基本假设 ............................................... 10 4.1.3 基准值 ............................................................... 10 4.2 变压器及电抗器的参数计算 ............................................... 10 4.2.1 主变参数计算 ......................................................... 10 4.3 网络等值变换与简化 ..................................................... 11 4.3.1 短路点d1短路计算（主变110kV侧） .................................... 11 4.3.2 短路点d2短路计算（35kV母线） ....................................... 12 4.3.3 短路点d3短路计算（35kV出线） ....................................... 12 4.3.4 短路点d4短路计算（10kV母线） ....................................... 12 4.3.5 短路点d5短路计算（10kV出线） ....................................... 13