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1、摘要该变电所是位于南方某城的边缘枢纽变电所。气候湿热、多风、有盐雾天气及年雷暴日数较多，在设计及选择设备过程中都应考虑进去。本变电所设计装有两台主变压器，220kV侧进线为两回路，110kV侧出线为六回，10kV侧出线为六回。并带有一处二类负荷，设计的重点是保证供电的可靠性。220kV及110kV侧采用双母线接线形式且110kV侧带旁路母线，10kV侧采用单母线分段的接线形式。设备选择上，必须考虑安全和经济性，保证所选的电气设备性能好、价格低廉，在配电图的布置方面，高压侧采用分相中型布置，中压侧则沿用了
2、传统的苏联式的普通中型布置，而低压侧采用屋内配电装置，布置在开关柜中。而二次部分与继电保护方面的设计突出了某些特点。关键词：220kV变压器主接线电气设备测量及保护装置AbstractThissubstationisaregionalsubstationwhichlocatestheedgeofsomecountyinGuangdongprovince.Sufferingtheinfluenceofspecialweathercondition,hotanddamp、windy、saltfogandmo
3、rethunderperyear,therefore,allthatshouldofferconsiderationinthecourseofdesigningandchoosingequipments.Therearetwomaintransformersinthissubstation,220kVisdoublereturncircuitsinternalwire,110kVhas6circuitsexternalwire,10kVhas6circuitsexternalwirewithaclass
4、IIload.Thefocalpointinthemainwireconnectiondesignisthedependabilityofguaranteeingtosupplypower.220kVand110kVadoptdoublebusbarwireconnectionformwithaby-passbusbaronthesideof110kV,10kVadoptssinglebusbarwithasegmentwireconnectionform.Equipmentschoosebaseson
5、thepremisethatguaranteeingtosupplypowersafely,havegivenconsiderationtoeconomy,possiblyadoptthenewtypeproductsthathavefineelectricperformanceandlowprice,andatthemeantimetrysomeperspectiveunconventionalproducts.Inthepartofdistributionapparatus,high-voltage
6、adoptsmediummodewithphasesplitting,medium-voltagecontinuestousetraditionalSovietmodewhilebeingordinarymediummodeandlow-voltageadoptsroomdistributioninstallation,beingfixedupintheswitchcupboards.Designofrelayprotectionandsecondarypartoutstandcharacterthat
7、convenientonmeasure、control,、managementandprotection.Thewholeprogrammingforthedistrictofsubstationisbeautiful,environmentalprotection,outstandingpracticable,functionalandsustainableandexpansionaryforkeepingondevelopment.Keywords：220kVtransformermainwirec
8、onnectionelectricequipmentsmeasureandprotectionequipments目录摘要IAbstractII目录III1前言12.原始资料分析22.1性质分析22.2自然条件及地质条件分析23.主变的选择和主接线的确定33.1负荷统计表33.2主变压器的选择43.3主接线的确定54.短路计算64.1短路电流计算目的64.2假设条件和原则64.3系统简化阻抗图64.4短路电流的计算方法64.5各短路点参数的
