毕业设计说明书
摘要
在电力系统中变电站是极为重要的组成部分,所以,变电站的设计正确与否,将影响整个电力系统的安全可靠行和运行效率。本说明书详细介绍了本次110kV变电站设计的过程和具体步骤。根据各专业提供的资料和相关的设计规范,拟定设计方案同时进行方案比较及作出最终设计方案的确定。
首先分析设计原始资料,计算出需要的负荷,同时考虑长远发展情况选择合适的负荷增长率。确定各电压等级出线回路后,选择不同电气主接线进行方案比较,从可靠性、灵活性和经济性三个方面进行,最后选择本次设计电气主接线方案。确定主变型号,计算出35kV和10kV侧短路电流。根据短路电流值选择和校验相应的电气元件。最后简要说明本次110kV变电站防雷接地设计。
关键字:110kV变电站;主接线;短路电流计算;电气设备选型
I
毕业设计说明书
Abstract
Transformer substation in electric power system is a very important part of, so, the design of the transformer substation is correct or not, will affect the whole electric power system safe and reliable line and running efficiency.This manual introduces the 110 kV substation design process and specific steps.According to the information provided by the professional and related design specifications, and formulate design plan and scheme comparison and make a final determination of design scheme.
First of all the raw data of the analysis and design, calculate the need of load, at the same time, considering the long-term development situation to choose the appropriate load rate.After each voltage grade wire loop, choose a different main electrical wiring scheme comparison, reliability, flexibility and economy from three aspects, finally choose the design of the main electrical wiring scheme.To determine the main transformer model, calculate the 35 kV and 10 kV side short circuit current.According to the short circuit current value selection and check the corresponding electrical components.Finally briefly explain the 110 kV substation grounding design.
Key word: 110 kV substation;Main electrical connection;Short circuit current calculation;Electrical equipment selection
II
毕业设计说明书
目录
摘要 .......................................................... I
Abstract ...................................................... II 目录 ........................................................... 1
第一章 绪言 ...................................... (1) 第二章 负荷计算及主变选择 ........................ (2)
2.1原始资料 ........................................... (2) 2.2 负荷计算 ........................................... (2) 2.3 主变压器的选择 ..................................... (3) 2.4所用变压器的选择 ................................... (5) 2.5 小结 ............................................... (6)
第三章 电气主接线设计 ............................ (7)
3.1电气主接线概述 ..................................... (7) 3.2 电气主接线的基本要求 ............................... (7) 3.3 主接线的基本形式和特点 ............................. (7) 3.4 设计方案和结果 .................................... (11)
第四章 短路电流计算 ............................. (13)
4.1 假设条件 .......................................... (13) 4.2 基准值选取 ........................................ (13) 4.3计算过程 .......................................... (14) 4.4 短路电流计算结果 .................................. (20)
第五章 电气设备选择与校验 ....................... (21)
5.1 电气设备选择的原则和条件 .......................... (21) 5.2 110KV侧高压配电装置选择 ........................... (23)
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毕业设计说明书
5.3 35KV侧配电装置选择 ................................ (28) 5.4 10KV高压开关柜的选择 .............................. (31) 5.5 本章小结 .......................................... (36)
第六章 变电站防雷接地设计 ....................... (37)
6.1直击雷保护 ........................................ (37) 6.2变电站侵入波保护 .................................. (37) 6.3主变防雷保护 ...................................... (38) 6.4变电站接地保护 .................................... (38)
第七章 总结 ..................................... (39) 致 谢 .......................... (错误!未定义书签。) 参考文献 ........................................ (40) 附录 ............................................ (42)
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