摘要：变电站是电力系统中不可缺少的一部分，对电网的安全、经济运行起着至关重要的作用。本次毕业设计主要对高铁牵引变电站的电气系统进行设计。牵引变电站对高铁进行供电，其稳定性与可靠性会直接影响到高铁安全和正常运行。本次设计主要对牵引负荷进行计算，确定主变压器的容量、型号及台数，按照电气主接线的设计原则和基本要求去设计电气主接线图。进行短路电流计算，根据短路计算的数据结果对主要的电气设备进行选择，对选择的设备进行动稳定和热稳定性校验并对其保护设施进行讨论。通过对高铁牵引变电站电气部分的设计，最终达到满足电力机车安全可靠运行的条件。本次设计使用CAD软件绘制设计电气主接线图。

关键词：牵引变电站；负荷计算；短路计算；设备选择；主接线

Design of Electric Section of High-speed Railway Traction Substation

Abstract:   Substations are an indispensable part of the power system and play a crucial  role in the safety and economic operation of the power grid. This graduation project is mainly designed for the electrical system of high-speed rail traction substations. Traction substations supply power to high-speed railways. The stability and reliability of substation power supply will directly affect the safety and normal operation of high-speed rails. This design mainly calculates the traction load, determines the capacity, type and number of the main transformer, and designs the electrical main wiring diagram according to the design principles and basic requirements of the electrical main wiring. Calculate the short circuit current, select the main electrical equipment based on the data calculated by the short-circuit calculation, perform dynamic stability and thermal stability verification on the selected equipment, and perform relay protection calculations on the traction transformer and feeder configuration. Only properly and reasonably configuring relay protection for electrical equipment can ensure that the traction substation can be promptly removed in the event of a fault, warnings are issued and standby measures are activated. Through the design of the electric part of the high-speed railway traction substation, the conditions for safe and reliable operation of the electric locomotive are finally met. This design uses CAD software to draw the design electrical main wiring diagram.

Keywords: Traction substation; Load calculation; Short circuit calculation; Equipment selection; Main wiring

目录

摘要 ii

Abstract iiii

目录 iii

1绪论 1

1.1课题研究目标意义 1

1.2国内外研究现状与水平 1

1.3发展方向 2

1.4设计任务 2

2负荷计算 3

2.1负荷计算内容 3

2.1.1负荷电流 3

2.1.2变压器容量 3

2.2计算过程 4

2.2.1原始数据 4

2.2.2计算过程 4

2.3变压器选择 7

2.3.1相数与结线选择 7

2.3.2类型选择 8

3电气主接线设计 9

3.1概述 9

3.2电气主接线设计的基本要求 9

3.3电气主接线的形式 10

3.3.1单母线接线 10

3.3.2单母线分段接线 11

3.3.3单母线带旁路母线接线 12

3.3.4单母线分段带旁路母线接线 13

3.3.5双母线接线 13

3.3.6双母线分段 14

3.3.7负荷侧电气主接线 14

3.4主接线方式的选择和设计 15

3.4.1主接线方式选择 15

3.4.2AT牵引变电所的设计介绍 15

3.5牵引变电所所址的选择 16

4短路电流的计算 17

4.1短路计算的目的 17

4.2短路电流的计算 17

4.2.1简化等值电路分析 17

4.2.2计算过程 18

4.3统计的结果列表 19

5牵引变电站电气设备的选择 20

5.1电气设备选择的一般原则 20

5.2母线的选择与校验 20

5.2.1对于在110千伏的高压处的母线进行选择 20