600MW火电厂电气主接线方案与设备布置设计

600MW火电厂电气主接线方案与设备布置设计

600MW火电厂电气主接线方案与设备布置设计

摘要

本设计是对600MW 火电厂新建工程主接线方案与设备布置进行设计，主要运用发电厂电气部分、高电压技术、电力系统分析、电力系统自动化等专业知识完成“发电厂主接线的设计”。具体设计内容包括主接线的接线方案设计、负荷分析计算、变压器选择、配电装置设计、绘制电气主接线图、绘制厂用电接线原理图。本设计严格遵循发电厂电气部分的设计原则，并结合实际情况将主接线的接线方案确定为双母线接线方式，发电机变压器组确定为单元接线。同时，利用换算系数法进行负荷分析计算，高压厂用变压器选择低压分裂绕组变压器，确定了合适的短路点并进行短路电流计算。然后对电气设备的动、热稳定校验，对主要电气设备型号、参数进行确定，设计并绘制了220kV配电装置平面布置图及220kV配电装置断面图。

关键词：火电厂；电气主接线；电气设备；配电装置

600MW火电厂电气主接线方案与设备布置设计

THE MAIN ELECTRICAL WIRING PROGRAMS AND EQUIPMENT LAYOUT DESIGN OF 600 MW THERMAL

POWER PLANT

ABSTRACT

The text is about main wiring programs and equipment layout design of a new construction of 600 MW thermal power plant. Use of Power Plant Electrical Parts, High Voltage Technology, Power System Analysis, Power System Automation Expertise to complete the design of the main wiring of power plants. The specific design elements include the main wiring connection design, load analysis and calculation, transformer selection, design of power distribution equipment, draw electrical wiring diagram, drawing auxiliary power wiring schematic. The design strictly follow the design principles of power plant electrical part, combined with the actual situation of the main wiring connection program and determined the program for the dual-bus wiring, generator-transformer set identified as unit connection. At the same time, use the conversion factor method for load calculation, the high-voltage station transformer select low-voltage split-winding transformer, and determine the appropriate short-circuit point and short circuit current calculation. Then determined the dynamic and thermal calibration of electrical equipment, determined the electrical equipment models, parameters. Designed and drew a floor plan of 220 kV power distribution unit and the sectional drawing power of 220 kV distribution unit.

Key Words: thermal power plant; main electrical wiring; electrical equipment; power

distribution equipment

600MW火电厂电气主接线方案与设备布置设计

目录

第一篇 设计说明书 .................................................................................................................. 1

1 电气一次接线设计 ....................................................................................................... 1

1.1 发电机电压级接线 ............................................................................................. 1 1.2 220kV电气主接线 ............................................................................................. 2 1.3 6kV厂用电接线 ................................................................................................. 4 2 负荷计算及变压器选择 ............................................................................................... 5

2.1 厂用负荷计算 ..................................................................................................... 5 2.2 主变台数、容量和型式的确定 ......................................................................... 8 2.3 厂用变压器台数、容量和型式的确定 ........................................................... 11 3 最大持续工作电流及短路计算 ................................................................................. 14

3.1 各回路最大持续工作电流 ............................................................................... 14 3.2 220kV各回路最大持续工作电流计算 ........................................................... 14 3.3 短路电流计算点的确定、基本假设、目的和短路电流计算结果 ............... 15 4 主要电气设备选择 ..................................................................................................... 16

4.1 高压断路器的选择说明 ................................................................................... 16 4.2 隔离开关的选择说明 ....................................................................................... 18 4.3 母线的选择说明 ............................................................................................... 19 4.4 绝缘子和穿墙套管的选择说明 ....................................................................... 21 4.5 电流互感器的配置和选择说明 ....................................................................... 22 4.6 电压互感器的配置和选择说明 ....................................................................... 24 4.7 各主要电气设备选择结果 ............................................................................... 24 5 配电装置的选型 ......................................................................................................... 26

5.1 屋内配电装置 ................................................................................................... 26 5.2 屋外配电装置 ................................................................................................... 26

第二篇 设计计算书 ................................................................................................................ 29

6 短路电流计算书 ....................................................................................................... 29

600MW火电厂电气主接线方案与设备布置设计

7 主要电气设备选择计算书 ....................................................................................... 32

7.1 高压断路器的选择计算 ............................................................................ …… 此处隐藏：4543字，全部文档内容请下载后查看。喜欢就下载吧 ……