110kv变电站接地与防雷的设计 毕业设计

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1、110kV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究，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计，使该站的接地电压满足允许0值，跨步电压和

2、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内所有电器设备的要求，对站内进行避雷针设置构成防雷保护措施，使全站设备都处于防雷保护范围内。本文通过计算短路电流，从结论中选择合适接地材料，设置接地网，达到防雷保护变电站的全范围目的。关键词：电力线路110kV变电站防雷措施接地网设计VAbstractWiththerapideconomicdevelopment,productionandhouseholdelectricit

3、yrequirementsofpowerqualityaregettinghigherandhigheruseofelectricity,atthesametimethesecurityrequirementsarefurtherincreased.Lightninghasbeenoneoftheimportantfactorsthatendangersafeandstableoperationofpowersystems,ifthesubstationlightningaccidentoccurs,itwillcauseblackoutsandinconvenienc

4、etothesocialproductionandpeople'slives,whichrequireslightningprotectionmeasureshavetobeveryreliable.Accordingtothesubstation,lightningprotectionandprotectionofthesubstationgroundinggriddesign,thestationandthegroundvoltagetomeettheallowablevalue,thestepvoltageandgroundvoltagedoesnotexceed

5、theallowablevalue,thegroundingresistance,touchvoltageandstepvoltagerequirementsaremet,selecttheappropriateequipmentoflightninginvasionwaveovervoltageprotectionmasterplanlayoutoftheelectricalsubstationbysubstationcivilarea,settherulesaccordingtothelightningrod,therequirementsofthesubstati

6、onarchitecturespanandprotectionstationsallelectricalequipment,stationlightningrodtosettheformoflightningprotectionmeasures,sothatthewholestationequipmentinthelightningprotectionwithin.Bycalculatingshort-circuitcurrentfromtheconclusiontoselecttheappropriategroundingmaterials,setthegroundn

7、etwork;toachievethepurposeofthefullrangeoflightningprotectionofsubstations.Keywords:powerlines110kvsubstationlightningprotectionmeasuresgroundgriddesignV目录摘要…………………………………………………………………………………IAbstract……………………………………………………………………………II绪论…………………………………………………………………………………11设计原始资料………