欢迎来到天天文库
浏览记录
ID:27420220
大小:293.69 KB
页数:29页
时间:2018-12-03
《110kv变电站接地与防雷的毕业设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、llOkV变电站接地与防雷的设计2012年5月llOkV变电站接地与防雷的设计TheDesignof110kVSubstationGroundingandLightningProtection摘要随着经济的快速发展,企业生产和家庭用电对电能质量的要求越来越高,同时使用电能的安全性的要求也在进一步提高。雷电一直是危害电力系统安全稳定运行的重要因素之一,如果变电站发生雷击事故,将造成大面积停电,给社会生产和人民生活带来不便,这就要求防雷措施必须十分可靠。文章对变电站防雷保护系统进行了研宄,并提出了变电站防雷与接地措施。根据该变电站的基本情况,对该变电站的接地网防雷和保护进行设
2、计,使该站的接地电压满足允许0值,跨步电压和接地电压不超过允许值,其接地电阻、接触电压和跨步电压都满足要求,选择合适的设备对雷入侵波引起的过电压进行保护,由变电站土建面积进行变电站电气总平面的布置,根据避雷针设置规则、变电站构架跨度及保护站llOkV变电站防雷措施接地网设计IAbstractWiththerapideconomicdevelopment,productionandhouseholdelectricityrequirementsofpowerqualityaregettinghigherandhigheruseofelectricity,atthesamet
3、imethesecurityrequirementsarefurtherincreased.Lightninghasbeenoneoftheimportantfactorsthatendangersafeandstableoperationofpowersystems,ifthesubstationlightningaccidentoccurs,itwillcauseblackoutsandinconveniencetothesocialproductionandpeople’slives,whichrequireslightningprotectionmeasuresh
4、avetobeveryreliable.Accordingtothesubstation,lightningprotectionandprotectionofthesubstationgroundinggriddesign,thestationandthegroundvoltagetomeettheallowablevalue,thestepvoltageandgroundvoltagedoesnotexceedtheallowablevalue,thegroundingresistance,touchvoltageandstepvoltagerequirementsar
5、emet,selecttheappropriateequipmentoflightninginvasionwaveovervoltageprotectionmasterplanlayoutoftheelectricalsubstationbysubstationcivilarea,settherulesaccordingtothelightningrod,therequirementsofthesubstationarchitecturespanandprotectionstationsallelectricalequipment,stationlightningrodt
6、osettheformoflightningprotectionmeasures,sothatthewholestationequipmentinthelightningprotectionwithin.Bycalculatingshort-circuitcurrentfromtheconclusiontoselecttheappropriategroundingmaterials,setthegroundnetwork;toachievethepurposeofthefullrangeoflightningprotectionofsubstations.Keywords
7、:powerlines1lOkvsubstationlightningprotectionmeasuresgroundgriddesignII摘耍绪论IAbstract11设计原始资料1.1设计变电站的基本情况1.1.1接地网与防雷保护的目的,,,1.1.2变电站规模、容量与站区地理条件1.1.3系统容量及阻抗值1.1.4变电站电气平面布置总图1.1.5短路电流计算接线图1.2设计要求1.3设计的基本短路电流详细计算2.5.6入地短路电流计算结果今,,,,,今,今,,9今今,今今,,今,,今,,今,,今,,今今,J2,,10I
此文档下载收益归作者所有