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《广东电网同塔多回线路雷击跳闸影响因素及故障分析.pdf》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、第36卷第3期电网技术Vo1.36NO.32012年3月PowerSystemTechnologyMar.2012文章编号:1000.3673(2012)03.0081.07中图分类号:TM86文献标志码:A学科代码:470·4034广东电网同塔多回线路雷击跳闸影响因素及故障分析彭向阳,詹清华2,周华敏(1.广东电力科学研究院,广东省广州市510080;2.佛山供电局,广东省佛山市528000;3.广东电网公司,广东省广州市510600)InfluencingFactorsofLightningOutageinMulti—CircuitTransmissionLinesonSameTo
2、werinGuangdongPowerGridandFaultAnalysisPENGXiangyang.ZHANQinghua。ZHOUHuamin(1.GuangdongElectricPowerResearchInstitute,Guangzhou510080,GuangdongProvince,China;2.FoshanPowerSupplyBureau,Foshan528000,GuangdongProvince,China;3.GuangdongPowerGridCorporation,Guangzhou510600,GuangdongProvince,China)ABS
3、TRACT:Inrecentyearsthelandsupplyforpowerfactors;lightningresistinglevel;faultanalysisconstructionprojectsisdecreasedincreasinglyanditmakesthe摘要:近年来广东地区线路工程用地趋紧,同塔多回线路规plannerofUHV/EHVtransmissionlineconstructioninclined模迅速增大,导致多回线路雷击同时跳闸比例显著上升,给toadoptthestructureofmulti-circuittransmissionlines
4、onthe电网安全运行带来新的挑战。介绍同塔线路雷击同时跳闸的sametower,thereforeastheresulttheproportionof特点,分析雷击跳闸关键因素的影响,并对典型雷击同时跳simultaneouslightningoutageofmulti—circuittransmission闸故障进行电磁暂态复原分析。指出雷电反击是造成同塔线linesonthesametowerevidentlyraises,thusthesecure路多回同时跳闸的绝对主因,但强雷暴过程中连续雷电绕击operationofpowergridisaffected.Thepeculi
5、arityof也会导致多回线路同时跳闸,强调应重点防止110、220kVsimultaneouslightningoutageoccurredinmulti—circuit同塔线路双回雷击同时跳闸。并指出同塔线路反击跳闸受工transmissionlinesonthesametowerispresentedandthe频电压及相序排列影响较大,雷击同时跳闸较多发生在同名influencesofkeyfactorsonlightningoutageareanalyzed,相,且上横担绝缘子距雷击点较近较易发生闪络。besides,therecoveryanalysisonelectrom
6、agnetictransientoftypicalsimultaneouslightningoutagefaultisperformed.关键词:输电线路;同塔多回;雷击跳闸率;影响因素;耐Resultsofrecoveryanalysisshow曲atthemainreasonleading雷水平;故障分析tosimultaneouslightningoutageofmulti—circuittransmission0引言linesonthesametoweristheflashbackoflightning,howeversuccessiveshieldingfailureslea
7、dtosimultaneouslightning输电线路分布范围较广、运行环境复杂,线路通outageofmulti—circuittransmissionlinesaswel1.Itis道存在许多不可控因素,运行中容易遭受雷电、污秽、emphasizedthatspecialattentionsshouldbepaidtothe外力破坏及其他自然灾害影响。广东地处东南沿海,preventionofsimultaneouslightningou
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