鄂西220kv朝郭线耐雷性能-研究

《鄂西220kv朝郭线耐雷性能-研究》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、Tripgroundinclinationangleofthegroundtoprotectthewires,towershighcalling,andthegroundleadtoanegativeinclinationangleofprotectionfailurewereanalysis.Linecountercurrentmethodshaveapointmethod,impedancemethod,calculationmethods.Inthispaper,throughtheesta

2、blishmentofamulti-waveimpedancemoduletowergroundingresistancemodule,insulatorflashoversimulationmodeltocountermodules,linemodulesandothercomponentsoftheline.THELIGHTNINGhorizontallineiscalculatedcounterattackbyelectromagnetictransientprogram(EMTP).And

3、toanalyzethevariousfactorsaffectingthelevelofminecounter-resistance,especiallytocountertheimpactofthepowerfrequencyvoltageflashoverphasesequencetobeanalyzed.Keywords:lightningshieldingEGMfailuretrip—outratebackstrikingEMTP万方数据目录引言.....................

4、..................................11绪论.....................................................21.1研究背景和意义.........................................21.2国内外研究现状.........................................31.3雷电参数及线路参数.....................................71.4本文

5、的研究内容........................................112架空输电线路绕击计算分析................................122.1导线暴露空间的分析方法................................122.2绕击跳闸率的计算......................................132.3本章小结..............................................193.1

6、EMTP程序的基本原理...................................203.2反击仿真模型建立......................................223.3反击跳闸率的计算......................................323.4本章小结..............................................324耐雷性能影响因素分析...................................

7、.344.1影响220kV朝郭绕击性能的因素..........................344.2影响220kV朝郭反击耐雷性能的因素......................394.3本章小结..............................................485结论....................................................49参考文献........................................

8、.......51后记....................................................55万方数据三峡大学硕士学位论文引言雷击是引起输电线路跳闸的主要原因之一。由于架空输电线路长期暴露自然环境中极易遭受雷击。线路落雷后，一方面有可能造成系统单相或多相接地短路，使线路跳闸，影响电网供电的稳定性；另一方面雷电侵入波沿输电线路传入变电站，会对变电站的电气设备造成严重的损害，造成重大事故。目前，不同电压等级输电线路针对雷害事故采取了大量的防雷保护措施