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院系名称：电气工程与自动化学院

毕业设计

题目名称：110kV变电站一次部分设计

摘要

本毕业设计主要根据所给数据和要求进行110kV变电站一次部分设计。首先根据任务书所给系统及线路负荷的有关技术参数，通过对所建变电站出线的考虑和对负荷资料的分析，在满足安全性、经济性及可靠性的前提下确定了110kV、35kV、10kV侧主接线的形式，然后又通过负荷计算及对供电范围内一级负荷供电可靠性的考虑及对N-1原则的应用，确定了主变压器台数、容量及型号，并依据N+1原则设计了变电所所用电，为以后的计算和设备选取做好准备，又进行等值网络化简，选择短路点做出短路等值电路并进行短路计算，根据短路电流计算结果及最大持续工作电流，对包括母线、高压断路器、高压隔离开关、互感器在内的电气设备进行了选择和校验，并根据工程情况参考有关技术手册确定了变电所的配电装置。本文同时对变电所防雷保护尤其是雷电沿导线进入变电所的侵入波保护进行了简单的分析并且还考虑了变电所接地网的设计，最后绘出了电气主接线图及配电装置图。

关键词：电气主接线 短路计算 电气设备 变电所设计 配电装置

Abstract

This paper designs a 110kV substation.Firstly,according to the given material,electricity line and the parameters of the load which is provided by the assignment book,through considering the would-be substation,analyzing electrical data,confirming the Main electrical bus formation of 110kV、35kV、10kV side based on security,economy and reliability,under the guide of dispiline N-1 then conform the numbers,volume and type of the main transformer through circuit calculation and supply district,thus getting the parameters of all the component,at the same time with the use of displine N+1,my paper designs the consume of substation ,simplify electric circuit,select short point to carry on short circuit calculations operation circuit, select and check out electrical equipment, including bus,breaker, disconnect switch, voltage transformer, current transformer and so on,so that conform the distribution apparatus.Configurating relay protection and setting-calculation for the electricity line,transformer and bus according to the load and short calculations.At the same time,this

paper analyses simply lightning protection and grounding system.Finally,two pictures are given including main electrical wiring diagram and 110kV power distribution equipment sectional

drawing

Keywords: Substation design,Transformer,Main electrical wiring,Equipment election