毕业论文题目电力系统变电站接地网分析与优化专业：电气工程及其自动化学院：电气工程学院年级：学习形式：学号：论文作者：指导教师：职称：完成时间：年月日摘要变电站的接地网是确保变电站工作接地、保护接地和防雷保护接地的必要设施，也是保障人身和设备安全、保证变电站可靠运行的重要手段。在我国的电力发展史上，曾多次出现因接地网设计不当造成的停电事故和安全隐患，因此，接地网的安全应引起电力部门的高度重视。特别是近年来我国经济的快速发展推动了电力负荷需求节节攀高，为了满足负荷日益增长的需要，变电站正朝大容量、特高压、紧凑型方向发展。接地短路电流越来越大，同时国家政策要求新建工程要少占或不占良田好土，建在高土壤电阻率地区的变电站越来越多，这些因素给变电站接地设计和施工造成了困难。为确保变电站投运后接地网的安全，就必须把好接地网设计这一关，从源头上减少和排除接地网出现故障的隐患。关键词：变电站、地网设计、接地阻抗、测量AbstractThesubstationgroundnetworkistoensurethatthesubstationgrounding,protectivegroundingandlightningprotectiongroundingnecessaryfacilities,andtoensurethesafetyofpersonandequipment,toensuretheimportantmeansofsubstationandreliableoperation.Powerdevelopmenthistoryinourcountry,hasrepeatedlyappearedduetoimpropergroundingnetworkdesignofthepoweroutageandsafehiddentrouble,therefore,thesafetyofgroundingnetworkshouldbepaidattentionduringtheheightofthepowersector.Especiallyinrecentyearstherapiddevelopmentofeconomyofourcountrypromotesthespirallingpowerloaddemand,inordertomeettheincreasingneedsoftheload,thetransformersubstationismovinginthedirectionoflargecapacity,highpressure,compactdevelopment.Groundingshortcircuitcurrenttothebigger,atthesametime,nationalpolicyrequiresless(ornot(newconstructionland,thegoodearth,builtinhighsoilresistivityareasubstationstandmoreandmore,thesefactorscauseddifficulttosubstationgroundingdesignandconstruction.Inordertoensurethesafetyofsubstationsparametergroundnet.through,youmustputthisgoodgroundingnetworkdesign,fromthesourcetoreduceandeliminatethehiddentroubleofthegroundingnetworkfailure.Keywords:substation,indesign,groundingimpedance,measurement目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc416529147"摘要PAGEREF_Toc416529147\hIHYPERLINK\l"_Toc416529148"AbstracPAGEREF_Toc416529148\hIIHYPERLINK\l"_Toc416529149"目录PAGEREF_Toc416529149\hIIIHYPERLINK\l"_Toc416529150"1绪论PAGEREF_Toc416529150\h1HYPERLINK\l"_Toc416529151"1.1接地技术的背景PAGEREF_Toc416529151\h1HYPERLINK\l"_Toc416529152"1.2接地的意义PAGEREF