城西某工厂35kV变电所一次系统设计

文档编号:DQ014    文档字数:20310,页数:46

 摘  要
 随着电网的发展和超高压大容量电网的形成，电力给国民经济和社会发展带来了巨大的动力和效应，并成为当今社会发展和人民日常生活不可缺少的能源之一。供配电设计已成为工业生产和电力系统的一个重要课题。本毕业设计主要对城西工业园区某工厂35kv变电所一次系统的设计，通过对设计原始资料的分析，对于城西各用电建筑及工厂的考察，初步确定其供电系统方案。对各个车间以及各组设备的负荷进行计算，统计出总负荷和功率因数以及电力系统的损耗；经过计算，然后确定降压变电所的主变压器的台数和容量、功率因数补偿方案。根据设计资料确定电源进线和电力来源，拟定供电系统图。再对其初选的系统进行相应的短路计算和高低压设备的选择及校验，最后进行继电保护设计。

关键词：供配电；变压器；短路电流；继电保护；功率因数

 Abstract
With the development of grid and high pressure of the formation of large-capacity power grids, electricity to the national economy and social development has brought about tremendous power and effect, and social development and become indispensable to people's daily lives, one of the energy. Distribution design for industrial production and has become an important power system issues. The main graduation project of the West Industrial Park on a factory 35kv substation design a system, through the design analysis of raw data for the west of the electricity plant construction and inspection, a preliminary program to determine its power supply system. For each workshop, as well as each group to calculate the load equipment, statistics and the total load power factor, as well as the loss of electric power system; calculated, and then to determine the main step-down transformer substation of the number and capacity, power factor compensation package. Determine the basis of design information into the power lines and power sources, the development of the power supply system map. Primary system and then its corresponding short-circuit calculations and the choice of high and low voltage equipment and calibration, the final design of relay protection.
 
 Key words:  Transformer station；Substation；Short-circuit current；Protection system；powerfactor

目   录
摘  要......Ⅰ
Abstract..Ⅱ

1  前言 .. 1
1．1课题背景 1
1．2 课题意义 2
1．3 课题内容 2
 1.3.1 内容概述 2
 1.3.2设计总任务 2
 1.3.3工业园区某模具厂用电设备分布图及基本数据 4
 1.3.4气象、水温、地质资料 6
 1.3.5供电部门技术资料及供电协议 7
2 变电所一次系统设计.... ..9
2．1 全厂负荷统计 9
 2.1.1负荷的概念 9
 2.1.2负荷的计算方法 8
 2.1.3无功功率补偿12
2．2 总降压变电所变压器的选择15
 2.2.1总变压器台数的选择及其原理15
 2.2.2总变压器的容量及型号选择16
2．3确定供电系统17
 2.3.1确定电源进线电压及电力来源17
 2.3.2拟定全厂供电系统部分草图17
2．4短路电流计算19
 2.4.1短路的危害及计算短路电流的目的19
 2.4.2短路电流计算19
2．5高压设备选择23
 2.5.1高压设备选择的原则23
 2.5.2各部分高压开关柜的型号选择24
 2.5.3变电所一次设备的选择和校验25
2．6高压线路的选择28
 2.6.1线路的选择与校验的项目及条件28
 2.6.2 35kv高压进线线路选择与校验 28
 2.6.3 10kv高压出线线路选择和校验 29
2．7继电保护装置. 30
 2.7.1继电保护的任务和要求  29
 2.7.2系统继电保护设置31
 2.7.3主变压器的继电保护33
2．8防雷与接地设置35
 2.8.1变电所的防雷保护35
 2.8.2雷电侵入波的防护38
 2.8.3变电所公共接地装置的设计38
 2.8.4接地刀闸的用处39
3  总 结40
致 谢 41
参考文献42

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