(最新版)110Kv变电站电气主接线设计毕业设计论文28831078

摘 要

根据设计任务书的要求，本次设计为11010kV广阳变电站电气主接线的初步设计，并绘制电气主接线图。该变电站设有两台主变压器，站内主接线分为110kV、10kV两个个电压等级。110KV电压等级采用双母线接线，10KV电压等级采用单母线分段接线。

本次设计中进行了电气主接线的设计、短路电流计算、主要电气设备的选择，包括断路器、隔离开关、互感器、导线截面和型号的选择和校验；主要设备继电保护设计，包括线路等元件的保护方式选择和整定计算。

本设计以《35～110kV变电所设计规范》、《常用供配电设备选择手册》、《电力装置的继电保护和自动装置设计规范》等规范规程为依据，设计的内容符合国家有关经济技术政策，所选设备全部为国家推荐的新型产品，技术先进、运行可靠、经济合理。 关键词：变电站；电气主接线；变压器； 设备选型； 继电保护。

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Abstract

From the guide of engineering design assignment, we primary power-system of 110kV、10KV substation and draw main electrical one-line diagram. There are two main transformer in the substation in which main electrical connection can be divided into two voltage grades: 110kV, 10kV.It deposits sectionalized single bus bar scheme per grade.

There is also a design for main electrical connection in this engineering, 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

Keywords:transformer substation; electrical main wiring; transformer; equipment type selection; protective relaying；

目 录

摘要······························· Ⅰ Abstact ····························· Ⅱ 1 变电站电气主接线设计及主变压器的选择 ·············· 1 1.1 主接线的设计原则 ····················· 1 1.1.1 主接线的设计原则 ·················· 1 1.2 主接线的设计 ······················· 3 1.2.1 设计步骤 ······················ 3 1.2.2 初步方案设计 ···················· 3 1.2.3 最优方案确定 ···················· 4 1.3 主变压器的选择 ······················ 5 1.3.1 主变压器台数的选择 ················· 5 1.3.2 主变压器型式的选择 ················· 5 1.3.3 主变压器容量的选择 ················· 6 1.3.4 主变压器型号的选择 ················· 6 1.4 站用变压器的选择 ····················· 9 1.4.1 站用变压器的选择的基本原则 ············· 9 1.4.3 站用变压器型号的选择 ················ 9 2 短路电流计算 ·························· 10 2.1 短路计算的目的、规定与步骤 ················ 10 2.1.1 短路电流计算的目的 ················· 10 2.1.2 短路计算的一般规定 ················· 10 2.1.3 计算步骤 ······················ 10 2.2 变压器的参数计算及短路点的确定 ·············· 11 2.2.1 变压器参数的计算 ·················· 11 2.2.2 短路点的确定 ···················· 11