摘要本文根据变电站设计文件《35kV~110kV无人值班变电所设计规程》编写的。本文以安全、可靠、经济为指导，在保证安全性的同时，尽量兼顾经济性。本文分为三部分：任务书、说明书、计算书。第一部分为任务书，主要阐明了在毕业设计里应掌握的知识、技能以及应完成的成果：第二部分为说明书，是本文主要的部分之一，主接线、变压器选择及无功补偿、变电所保护都是在说明书中进行论述的：第三部分是计算书，包括短路计算和基于短路计算结果的导体及电气设备的选择计算。首先通过所给数据，计算出有功负荷和无功负荷，根据有功负荷和无功负荷的值，计算出无功补偿的大小和变压器的容量。比较接线方案，确定变电所电气主接线方案。对变电所进行防雷、接地和继电保护。其次，画出变电所电气部分简图，计算出在35kV侧和10kV侧的三相短路电流。根据短路电流的计算结果，计算、选择、校验导体和电气设备。确定所用电气设备的型号。最后根据所电气设备所选型号，画出变电所主接线图，标明电气设备型号，整体完成毕业设计。关键词：变电站设计：负荷计算：短路电流计算；电气设备选择35kV变电站电气部分设计AbstractThis paper is based on substation design document "35kV~110kV unattended substationdesign rules"prepared.This article is safe,reliable,economical as a guide,while ensuring safety,while taking into account the economy.This article is divided into three parts:task book,manual,calculation book.The second part is the manual,which is one of the main parts of this paper.Themain wiring,the transformer selection,the substation protection are the main part of the main part ofthis paper.The first part is the task book,which mainly clarifies the knowledge,skills and the resultsto be completed in the graduation design.Is discussed in the manual;the third part is the calculationof books,including short-circuit calculation and short-circuit calculation based on the results ofconductor and electrical equipment selection calculation.First of all,through the data given to calculate the active load and reactive load,according tothe active load and reactive load value,calculate the size of reactive power compensation andtransformer capacity.Compare the wiring scheme to determine the electrical main wiring scheme ofthe substation.Lightning protection,grounding and relay protection for substations.Secondly,draw a schematic diagram of the electrical part of the substation,calculate the 35kVside and 10kV side of the three-phase short-circuit current.Calculate,select,verify conductors andelectrical equipment based on the results of the short-circuit current calculation.Determine the typeof electrical equipment used.Finally,according to the electrical equipment selected models,draw the substation main wiringdiagram,indicating the electrical equipment model,the overall completion of graduation design.Key words:substation design;load calculation;short-circuit current calculation;chooseelectrical device目录第一章任务书1.1毕业设计的主要内容71.2毕业设计应完成的成果1.3应掌握的知识与技能>第二章说明书…2.1概述2.2主接线设计…2.2.1概述2.2.2主接线方案的确定112.3主变压器选择2.3.1变压器的容量和台数的选择152.3.2变压器绕组形式的确定192.3.3变压器绕组数量选择的确定2.3.4绕组连接方式的确定…202.3.5调压方式的确定202.3.6冷却方式的确定202.4短路电流计算2.4.1短路的原因212.4.2短路的后果212.4.3短路的类型212.4.4短路计算主要任务、意义.222.5导体及电气设备的选择