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35kV小型化变电所一次、二次系统设计I摘要针对电网改造中对35kV小型化变电所从电气主接线、设备选择、电气平面布置、继电保护和二次回路设计特点以及建设周期、投资方面作了对比分析，提出了全户外布置的小型化变电所是目前当前变电所设计及建设的推荐方案。因此必须坚持：设备先进免维护，接线简单环节少；经济实用建设快；它不是粗糙设备的简单组合，而是新技术、新设备、新材料的科学运用，在一定意义上讲，代表一种现代化的水平。本次设计的主要内容是进行35kV变电所一次部分总体设计，它可以满足城镇工农业生产和生活所需要的电力负荷，增加供电量，改善电压质量，促进城镇工农业经济增长和提高人民的生活质量。同时，使农村电网向“短半径、密布点小容量”的方向发展，符合黑龙江省农村电网改造的基本要求。这次毕业设计涉及了电力系统、发电厂、继电保护、架空线路、二次接线等各科知识，通过这次毕业设计使我对大学所学的知识得以巩固，综合运用知识的能力也有了一定的提高，尤其对专业知识有了进一步的深化了解。通过对各门知识的学习和对各种资料的查询，使自己对各种新型电气设备，变电所的发展趋势也有了一定的了解。关键词:35kV小型化变电所电气设备35kV小型化变电所一次、二次系统设计IIABSTRACTAimattheagriculturenetreformationinissmallscaledtoturnthevillagetochangetheelectricitytothe35kVsconnecttheline,equipmentschoice,theelectricityflatsurfacetoarrangefromtheelectricitylord,protectaftertheelectricityandtwotimesbacktrackdesigncharacteristicsandconstucttheperiod,investtheaspectmadethecontrastanalysis,putforwardthevillagewholeopenairtoarrangesmallscaledtoturntochangeelectricityisavillagetochangecurrentlytherecommendationprojectthatelectricitydesignandconstruction.Thereforemustinsist:Theforerunneroftheequipmentsdoesnotneedthemaintenance,connectingthesimplelinkoflinelittle;Theeconomicpracticalconstructionisquick;Itisnotthesimplecombinationoftheroughequipments,butscienceusageofnewtechnique,newequipments,newmaterial,atcertainmeaningupspeak,representakindoflevelformodernize.Amaincontentsfordesignistocarryonthe35kVstochangetheelectricityoncepartoftotaldesign,itcansatisfythetownworkagricultureproductionandlivingtheelectricpowerneedburden,incrementpowersupplyquantity,improvementtheelectricvoltagequantity,promotethetownworkagricultureeconomygrowthandraisepeopleoflivingquantity.Atthesametime,makethevillagechargedbarbedwirenettothedirectiondevelopmentofshortradius,spreaddenselytoorderthesmallcapacity,meetbasicrequestoftheprovincevillagechargedbarbedwirenetreformationofHeilongjiang.Thistimegraduationthedesigninvolvestheelectricpowersystem,powerplantandprotect,buildsonstiltsthecircuitandconnectseachsectionofetc.oflineknowledgetwotimesaftertheelectricity,passingthisgraduationdesigntomakemecanmakestrongertotheknowledgethatuniversitylearn,comprehensiveusagetheabilityofknowledgealsohadthecertainexaltation,havingtotheprofessionalknowledgeparticularlyfurtherofturntheunderstandingdeeply.Passthestudytowardeachknowledgeandtothesearchofvariousdata,makeoneselftovariousnewelectricityequipments,changeelectricityisofdevelopmenttrendalsohadthecertainunderstanding.Keywords:35kVMiniatureElectricEquipmentSubstation35kV小型化变电所一次、二次系统设计III目录摘要.....................................................................IABSTRACT..................................................................II1前言..................................................................12负荷统计及计算...........................................................32.1负荷统计..........................................................32.2负荷计算..........................................................33主变压器的选择及主接线的设计............................................53.1主变压器的选择及主变压器数量的确定................................53.2主接线设计.........................................................53.3主接线图...........................................................54短路电流计算.............................................................74.1短路电流计算中短路点的确定........................................74.2短路电流计算.......................................................74.2.2元件电抗标么值..............................................74.2.3系统最大运行方式下的各点短路电流...........................84.2.4系统最小运行方式下的各点短路电流...........................94.3短路电流计算结果统计..............................................105电气设备的选择..........................................................115.1母线的选择........................................................115.1.135kV侧母线选择和校验......................................115.1.210kV侧母线选择及校验......................................125.2线路的选择........................................................135.2.135kV侧进线的选择..........................................135.2.210kV侧出线截面积的选择及校验..............................135.3断路器的选择......................................................145.3.135kV侧断路器的选及校验....................................155.3.210kV侧断路器的选择及校验..................................155.3.310kV侧母线分段断路器的选择及校验..........................165.3.410kV侧出线路断路器的选择及校验............................165.4隔离开关的选择及校验..............................................175.4.1选择型号及技术数据.........................................175.4.2校验.......................................................185.5电压互感器及其熔断器的选择.......................................185.5.1电压户感器的选择...........................................195.5.2熔断器的选择及校验.........................................215.5.3隔离开关的选择.............................................2235kV小型化变电所一次、二次系统设计IV5.6电流互感器的选择..................................................225.6.135kV侧电流互感器的选择及校验..............................225.6.210kV侧电流互感器的选择及校验..............................235.6.310kV侧母线分段电流互感器的选择............................235.6.410kV侧出线电流互感器的选择................................235.7绝缘子及穿墙套管的选择.................