设计简介
摘要
本设计主要是针对焦作电厂的110kV一次系统，概述了焦作电厂设计的基本过程和基本方法。第一章概括介绍了国内外电力工业的研究及发展现状和焦作电厂的基本情况，为后几章提供所需的基本资料。第二章是电气主接线和电气设备的选择，根据焦作电厂的原始资料拟定了主接线方
案，确定发电机、主变压器、高压厂用变压器和高备变压器的容量和型号。发电厂电气主接线是发电厂电气设计的主体，与电厂运行的可靠性、经济性要求等密切相关，对电器选择和布置，继电保护和控制方式等都有较大的影响。第三章对焦作电厂一次系统做了短路电流计算，为后面设备的选型提供了依据。第四章是一次系统电器设备的选择，并在正常工作条件下和短路条件下对其进行校验。第五章是针对配电装置的设计，同时也是对前几章内容的综合概括。
随着国民经济和科学技术的发展，发电机单机容量在不断扩大，这就对电厂的主接线形式和配套设备提出了更高的要求，同时也要求发电厂做到可靠、经济、合理地运行，满足人们对电能的基本需求。
关键词：一次系统 主接线 短路电流计算 电气设备 配电装置Abstract
This design is to aim at making one subsystem of Jiaozuo power station 110 kV mainly. Chapter 1 has generalized to introduce research of domestic and international electric power industry and present conditions and basic circumstance of Jiaozuo power station that is basic data needed by several chapters later. Chapter 1 is a choice that connects line and the electricity equipments. According to the original data of Jiaozuo power station to draft connect line form, capacities and model numbers of generators, main transformers, the transformer the high pressure used by an factories, high the capacity transformers used in case. Connects the line is body of designs the power plant,. Credibility and economy standard of power station is closely related, it has bigger influence to choice and arrangement of the electric appliances, to the way of protection and control, etc. According to the technique data of chapter 2, do short-circuit electric current calculation of subsystem in chapter 3, provides base for the behind equipments. The choice of the subsystem in Chapter 4, it's carry on check electric of appliances equipments under the condition of normal hot-circuit condition. Chapter 5 is aim to the design of the power distribution equipment. Also is the summary of before part.
Along with the development of science and technology, single machine capacity of generator is extending continuously, it needs higher requests to connect the line form and the kit equipments of the power station, also request the power plant to attain the credibility, economy, reasonable movement, also satisfy the people's basic need that is the electric power.
Keywords：the main system，forms of main connected lines, short-circuit calculation，electrical equipments, the power distribution equipments
目录
前言 11. 绪论 2
1.1 国内外研究及发展现状 2
1.2 焦作地理情况 3
1.3 焦作电厂基本情况 3
1.4 本课题的研究任务 4
2. 电气主接线设计及变压器选择 6
2.1电气主接线设计原则 6
2.2 电气主接线设计的基本要求 6
2.3电气主接线方案的确定 7
2.3.1 对原始资料的分析 8
2.3.2 110kV电气主接线 8
2.3.3 发电机变压器组电气主接线 10
2.4变压器的选择 11
2.4.1 主变压器的选择 11
2.4.2 厂用变压器的选择 14
3. 短路电流计算 15
3.1 短路电流计算的目的及短路电流计算条件 15
3.2 电抗标幺值的计算 15
3.3 短路电流计算 17
3.3.1 发电机端短路（K1点） 18
3.3.2 110kV母线短路（K2点） 19
4. 电气设备的选择 21
4.1 电气设备选择的一般条件 21
4.2 电气设备选择 24
4.2.1 断路器的选择 24
4.2.2 隔离开关的选择 26
4.2.3 发电机侧负荷开关和隔离开关的选择 28
4.2.4 电流互感器的选择 30
4.2.5 电压互感器的选择 31
4.2.6 发电机电压互感器和电流互感器的选择 32
4.2.7 避雷器的选择 33
4.2.8 110kV架空输电线的选择 34
4.2.9 110kV母线的选择 37
4.2.10 发电机出口母线的选择 39
4.2.11 110 kV母线支柱绝缘子 41
4.2.12 发电机侧母线支柱绝缘子 42
5. 配电装置 43
5.1 配电装置的设计原则与设计要求 43
5.1.1 配电装置的设计原则 43
5.1.2 配电装置的设计要求 43
5.2 配电装置的设计 44
结束语 46
致 谢 47
参考文献 48
