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1、220kV枢纽变电所设计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
2、采用分相中型布置,中压侧则沿用了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-54-220kV枢纽变电所设计AbstractThissubstationisaregionalsubstationwhichlocatestheedgeofsomecountyinGuangdongprovince.Sufferingtheinfluenceofspecialweathercon
3、dition,hotanddamp、windy、saltfogandmorethunderperyear,therefore,allthatshouldofferconsiderationinthecourseofdesigningandchoosingequipments.Therearetwomaintransformersinthissubstation,220kVisdoublereturncircuitsinternalwire,110kVhas6circuitsexternalwir
4、e,10kVhas6circuitsexternalwirewithaclassIIload.Thefocalpointinthemainwireconnectiondesignisthedependabilityofguaranteeingtosupplypower.220kVand110kVadoptdoublebusbarwireconnectionformwithaby-passbusbaronthesideof110kV,10kVadoptssinglebusbarwithasegme
5、ntwireconnectionform.Equipmentschoosebasesonthepremisethatguaranteeingtosupplypowersafely,havegivenconsiderationtoeconomy,possiblyadoptthenewtypeproductsthathavefineelectricperformanceandlowprice,andatthemeantimetrysomeperspectiveunconventionalproduc
6、ts.Inthepartofdistributionapparatus,high-voltageadoptsmediummodewithphasesplitting,medium-voltagecontinuestousetraditionalSovietmodewhilebeingordinarymediummodeandlow-voltageadoptsroomdistributioninstallation,beingfixedupintheswitchcupboards.Designof
7、relayprotectionandsecondarypartoutstandcharacterthatconvenientonmeasure、control,、managementandprotection.Thewholeprogrammingforthedistrictofsubstationisbeautiful,environmentalprotection,outstandingpracticable,functionalandsustainableandexpansionaryfo
8、rkeepingondevelopment.Keywords:220kVtransformermainwireconnectionelectricequipmentsmeasureandprotectionequipments-54-220kV枢纽变电所设计目录摘要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