摘要
本毕业设计论文是辽河油田60KV降压变电站电气设计。 全论文除了摘要、毕业设计书之外，还详细的说明了各种设备选择的最基本的要求和原则依据。 变压器的选择包括：主变压器的台数、容量、型号等主要技术数据的确定；电气主接线主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择，并制定了适合要求的主接线；短路电流计算是最重要的环节，本论文详细的介绍了短路电流计算的目的、假定条件、一般规定、元件参数的计算、网络变换、以及各短路点的计算等知识；高压电气设备的选择包括母线、高压断路器、隔离开关、电流互感器、电压互感器的选择原则和要求，并对这些设备进行校验和产品相关介绍 。而根据本论文所介绍的高压配电装置的设计原则、要求和60KV、10KV的配电装置，决定此次设计60 KV侧采用普通中型布置、10KV侧采用屋内配电布置。继电保护和自动装置的规划，包括总则、自动装置、一般规定主变压器、母线等设备的保护，而变电所的防雷保护则主要针对避雷针和避雷器的设计。 关键字：短路计算；校验；设备选择
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Abstract
The graduation thesis is the design liaohe oil field 60 KV buck electrical substation design.Whole thesis besides summary, graduate to design the book outside, returned the expatiation every kind of most basic request that equipments choose with the principle according to. The choice of the transformer includes:The main technique in number, capacity, model number...etc. in set data of the main transformer really settles;The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shortcoming and lords that connect the line form connects the linear choosing more, combining the lord that established the in keeping with request connect the line; Shortcircuit current calculation is calculation, network transformation that the most important link that calculation etc. knowledge, this thesis introduced the calculating purpose, assumption in shortcircuit current term, general provision, a parameter detailedly, and each short circuit order; The choice of the high pressure electric equipment includes the choice principle of the busbar, high pressure circuitbreaker, isolation switch, current transformer, voltage transformer with request, and proceed to these equipmentseses the school check with the related introduction in product.But go together with the design principle, request that electricity equip according to this thesis a high pressure for introducing to go together with the electricity device with the 60 KV,10 KV，decide to be this time to design a side adoption the cent the mutually medium-sized arranging, a side adoption is common medium-sized arranging.Relaying protection with the programming of the automatic device, include the total a protection for, automatic device, generally ruling main transformer, busbar...etc. equipments, but change to give or get an electric shock a design for defending thunder protection then primarily aiming at lightning rod with surge arrester, lightning arrester.
Key word: short circuit calculation;check; equipment selection
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目录
第一篇 说明书 ........................................................ 错误！未定义书签。 前言 ............................................................................................................. 1 1主变压器的选择...................................................................................... 2 1.1主变压器选择的要求 .................................... 2 1.2主变压器的选择....................... 错误！未定义书签。 2主接线形式的选择及说明 ..................................................................... 5 2.1接线的设计原则........................................ 5 2.2主接线的设计要求 ...................................... 5 2.3主接线的选择 ......................................... 6 2.4主接线的确定 ......................................... 8 3短路计算说明.......................................................................................... 9 3.1短路电流计算的目的 .................................... 9 3.2电力系统短路电流计算条件 .............................. 9 3.2.1基本假定 ........................................... 9 3.2.2一般规定 .......................................... 10 3.2.3电路元件参数的计算 ................................. 10 3.2.4等值电源的计算 ..................................... 11 3.2.5三相短路电流周期分量计算 ........................... 11
3.2.6冲击电流的计算 ..................................... 12 3.2.7不同电流代表的意义 ................................. 12 3.3设计中应注意的问题 ................................... 12 3.4计算结果 ............................ 错误！未定义书签。 4 高压电气设备选择 ............................................................................ 12 4.1 电器选择的一般要求 ................................. 12 4.1.1一般原则 .......................................... 19 4.1.2技术条件 .......................................... 19 4.2 断路器的选择 ........................................ 14 4.2.1参数的选择 ........................................ 14 4.2.2形式选择 .......................................... 21 4.3 隔离开关的选择 ...................................... 22 4.3.1参数的选择..........................................15 4.3.2型式的选择：....................................... 14 4.4 电流互感器的选择 ................................... 15 4.4.1参数的选择：....................................... 24 4.4.2型式的选择：....................................... 24 4.5 电压互感器的选择 ................................... 16 4.5.1参数的选择 ........................................ 16 4.5.2按接线方式选择 ..................................... 25 4.6 母线的选择 ......................................... 16
4.6.1 母线材料、形式、和布置方式的选择 ................. 16 4.6.2 母线截面尺寸的选择 ............................... 27 4.6.3 高低压侧母线选择 ................................. 18 4.7 高压开关柜的选择 ................................... 30 5 继电保护及自动装置设计 .................................................................. 20 5.1继电保护配置的作用和要求 ............................. 20 5.2母线保护: ........................................... 35 5.3变压器的保护 ........................................ 21 5.3.1保护种类 .......................................... 21 5.3.2保护的确定 ........................................ 36 5.4线路的保护 .......................................... 36 5.4.1配置原则 .......................................... 36 5.4.2规程规定 .......................................... 37 5.4.3 自动重合闸装置应符合的基本要求 .................... 37 5.4.4备用电源和备用设备自动投入 ......................... 37 6 高压配电装置....................................................................................... 38 6.1高压配电装置和设计原则及要求 ......................... 38 6.2设备的配置 .......................................... 39 6.2.1隔离开关的配置 ..................................... 39 6.2.2电压互感器的配置 ................................... 40 6.2.3电流互感器的配置 ................................... 40