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1、兰州交通大学毕业设计（论文）摘要雷电具有很强的危害性，因此应该重视牵引变电所雷电的防护。本文讲述了雷电、雷电压和雷电流的形成过程,并给出了雷电参数，阐述了防雷装置如避雷针、避雷器的防雷原理以及保护范围，给出了直击雷和感应雷的防护方案，介绍了目前我国牵引变电所防雷接地设计中常用的几种措施，如：合理选择牵引变电所修建的地理位置，架设避雷针、敷设接地网，在进线段装设避雷器，同时对几种防雷措施进行了深入的论述和定量的计算分析。基于常用的防雷接地的设计方法，对平北站110kV牵引变电所进行了详细的防雷接地设计。设计中，结合
2、当地现状，综合考虑了气候、地形、环境等多种因素，给出了较好的防雷接地保护方案。通过对牵引变电所的防雷接地设计，全面剖析了电力系统中如何提高牵引变电所的防雷水平，从而有效地降低牵引变电所的雷击事故，减少雷电对电网安全运行的影响。最后绘制了平北接地网的平面设计图。关键词：牵引变电所；防雷接地；雷电放电；雷电流45兰州交通大学毕业设计（论文）AbstractThelightninghasverystrongharmfulness,soweshouldpayattentiontodrawingtheshelterofth
3、elightningoftransformersubstation.Thistexttellstheformingprocessthatthelightning,thelightningvoltageandcurrent,providethelightningparameter.Atthesametime,itexpoundsthelightingprotectingprinciplesandprotectingscopesoflightingprotectingdevises,suchasthelightnin
4、grod,thelightingarrester.Itprovidestheshelterschemeofreactinglightingandattackinglightingdirectly,andhasrecommendedseveralkindsofthedailymethodwhichisduringthedesignoflightingprotectingandgroundinginthetransformersubstationatpresent,forinstance:ToChoosethegeo
5、graphicalpositionwheretobuiltthetransformersubstation,erectthelightningrod,laytheearthingnetwork,installthelightingarresteronthestockoflinesegment.Itcarriesonexpositionandquantitativecomputationalanalysistoseveralkindsoflightingprotectingmeasuressrespectively
6、also.Onthebasisoflightningprotectingandgrounding’sdesignmethodcommonlyused,itdesignslightningprotectingandgroundingonthe110kVPingBeitransformersubstation.Inthedesign,combinesthelocalcurrentsituation,hasconsideredmanykindsoffactorssuchastheclimate,topography,a
7、ndenvironmentsynthetically,providesbetterprogramsoflightningprotectingandgrounding.Throughthedesignsoflightingprotectingandgroundingoftransformersubstation,analyzinghowtoimprovetheleveloflightingprotectingofthetransformersubstationcompletelyinpowersystem,thus
8、reducetheaccidentoflightningstrikingeffectively,andtheimpactonsafeoperationoftheelectricwire.DrewtheleveldesigndrawingofthePingBeiearthingnetworkfinally.Keyword:Thetransformersubstation;L
