110kV变电站电气一次部分初步设计58747.doc

PAGE 摘 要 根据设计任务书的要求，本次设计为110kV变电站电气一次部分初步设计，并绘制电气主接线图及其他图纸。该变电站设有两台主变压器，站内主接线分为110kV、35kV和10kV三个电压等级。各个电压等级分别采用单母线分段接线、单母线分段接线和单母线分段接线。 本次设计中进行了电气主接线的设计、短路电流计算、主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器、母线等）、各电压等级配电装置设计、直流系统设计以及防雷保护的配置。 关键词：变电站 设计 防雷保护 ABSTRACT From the guide of engineering design assignment, we have to design primary power-system of 110kV substation and draw main electrical one-line diagram and others. There are two main transformer in the substation in which main electrical connection can be divided into three voltage grades: 110kV, 35kV with 10kV.It deposits sectionalized single bus bar scheme, sectionalized single and sectionalized single bus bar scheme per grade. There is also a design for main electrical connection in this ngineering, the calculation for short-circuit electric current, the selection of electrical device and calibration (including circuit breaker, isolator, current，transformer, potential transformer ,bus bar etc.) and the design for distribution installation per. voltage grade, direct current system and lightning protection is also included. Key Words：substation design lightning protection 目 录 HYPERLINK \l _Toc229625948 绪论 1 HYPERLINK \l _Toc229625949 第1章 变电站总体分析 2 HYPERLINK \l _Toc229625950 1.1 变电站总体分析 2 HYPERLINK \l _Toc229625951 第2章 负荷分析计算与主变压器的选择 4 HYPERLINK \l _Toc229625952 2.1负荷分析计算 4 HYPERLINK \l _Toc229625953 2.2主变选择 6 HYPERLINK \l _Toc229625954 2.3 无功补偿 8 HYPERLINK \l _Toc229625955 第3章 电气主接线设计 PAGEREF _Toc229625955 \h 11 HYPERLINK \l _Toc229625956 3.1主接线的设计原则和要求 11 HYPERLINK \l _Toc229625957 3.2主接线的设计步骤 PAGEREF _Toc229625957 \h 13 HYPERLINK \l _Toc229625958 3.3 电气主接线设计 PAGEREF _Toc229625958 \h 14 HYPERLINK \l _Toc229625959 第4章 短路电流计算及电气设备选择 PAGEREF _Toc229625959 \h 16 HYPERLINK \l _Toc229625960 4.1 短路电流的危害 PAGEREF _Toc229625960 \h 16 HYPERLINK \l _Toc229625961 4.2电气设备选择 PAGEREF _Toc229625961 \h 1