基于超高频法的GIS局放报警系统的设计毕业设计（论文）毕业论文论文题目基于超高频法的GIS局放报警系统的设计学生姓名学生学号专业班级学院名称指导老师学院院长摘要GIS装置具有较高的安全可靠性，但加工、运输、现场装配等多种原因，使得GIS设备不可避免地存在绝缘缺陷而影响其长期可靠性。这些缺陷通常比较微小和隐蔽，不足以导致在工频耐压试验时立即击穿，但投入运行后在正常运行电压作用下会发生局部放电，使缺陷逐渐发展扩大，甚至造成整个绝缘击穿或沿面闪络，从而对设备的安全运行造成威胁。本文简单讲述了一套用于判断GIS是否发生局部放电的在线监测系统。主要设计思路如下，利用天线接收超高频局部放电信号，然后经过检波比较形成脉冲信号进入单片机，使用单片机的脉冲累加进行计数，再定时读取脉冲数进行判断是否达到局部放电的阈值，如果已经发生局部放电，则通过GSM模块发送短信进行报警。关键词：GIS局部放电；特高频法；报警设计;C语言AbstractNormally,althoughGIShasquitehighsafetyandreliability,itslong-termreliabilitywillbeeffectedbyinsulationdefectscausedbyProcessing,transportationandfieldassemblywilleffectwithoutquestion.TheseInsulationdefectsareverytinyandhiddenprimarilyandnoteasttobreakdowninthePowerfrequencywithstandvoltagetest，buttheseInsulationdefectsareverytinyandhiddenprimarilyandnoteasttobreakdowninthePowerfrequencywithstandvoltagetest.ButwhentheGISputintoproduct,theInsulationdefectswillexpandgraduallyunderthehighvoltageandthenpartialdischargeshappenwhichmaymaketheinsulationlayerbreakdown,evenmoreitmaybeharmtothedeviceandworkers.Thisarticledescribeasystemappliedtojudgewhetherpartialdischargetakeplaceornot.Thefollowingismydesignidea.Usingahighfrequencyantennatorecievethesignalofpartialdischarge.Thesignalwhichishighfrequencyturnintoplusesignalwhosefrequencyisabout2Mafterdemodulatingandcomparing.ThissignalcanbecountedbyMCU,whenthecountvaluereachtothepreinstallvaluewhichisindicatedthepartialdischargehasoccured,thenMCUcontroltheGSMsendamessege.KeyWords：PartialdischargeofGIS；UHFmethod；Alarmdesign；Clanguage目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc356057598"摘要PAGEREF_Toc356057598\hIVHYPERLINK\l"_Toc356057599"AbstractPAGEREF_Toc356057599\hVHYPERLINK\l"_Toc356057600"目录PAGEREF_Toc356057600\hVIHYPERLINK\l"_Toc356057601"第1章绪论PAGEREF_Toc356057601\h1HYPERLINK\l"_Toc356057602"1.1GIS局部放电在线监测研究的目的和意义PAGEREF_Toc356057602\h1HYPERLINK\l"_Toc356057603"1.2GIS局部放电在线监测国内外发展现状PAGEREF_Toc356057603\h2HYPERLINK\l"_Toc356057604"1.3本人