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...330kv变电站电气系统设计[摘要]变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用。我国电力工业的技术水平和管理水平正在逐步提高，对变电所的设计提出了更高的要求。本次毕业设计的题目是《汉源变电站电气系统设计》。在设计的过程中，根据变电站应从电力系统整体出发，着重对变电站的电气一次部分和二次部分进行科学的规划设计。通过方案设计，方案可行性对比等方面进行论证，力求电气主接线简洁，配置与电网结构相适应的保护系统。基于此，从主接线形式确定、主变压器选择、电气设备选择和继电保护配置等方面提出了新的设计思路，尽力维持电力系统的高效、经济及安全目标。本次毕业设计针对汉源330kV变电站的特点，以电气设计部分为核心，通过分析拟建变电站的进出线方向和负荷等原始资料，从可靠性、安全性、经济性等方面考虑，确定了电气主接线方式。主要从主变压器的容量、数量的确定，负荷分析及计算，进行适量的无功补偿，以及短路电流的计算和变电所主要电气设备的选择（包括断路器，隔离开关，互感器等），继电保护的配置以及防雷保护的设计等方面阐述了330kV变电站电气部分的设计思路、设计步骤，并在选择时对电气设备进行了必要的计算和校验。同时，针对本次设计，完成相应图纸的绘制。[关键字]变电站；主变压器；电气主接线；电力系统继电保护。...[Abstract]Powersystemsubstationisanimportantcomponentoftheelectricpowersystem,thesubstationisthefocalpointoftransmissionanddistributionsubstationcandirectlyaffectthesafetyandstableoperationofpowersystemsafeandstableoperation.China'spowerindustry'stechnologicallevelandmanagementlevelisgraduallyimproving，thedesignofthesubstationhasputforwardhigherrequirements.ThegraduationprojectisentitledTheDesignofHanyuanTransformerSubstationElectricalParts.Inthedesignprocess,accordingtotheoverallpowersystemsubstationshouldstart,focusingononepartoftheelectricalsubstationandthesecondpartofthescientificplanninganddesign.Throughtheprojectdesign,aspectsandsoonplanfeasibilitycontrastcarryontheproof,makeseveryefforttheelectricalmainwiringtobesuccinct,thedispositionandtheelectricalnetworkstructureadaptprotectivesystem.Basedonthis,fromthemainwiringformdeterminedthatthemaintransformerchoice,aspectsandsoonelectricalequipmentchoiceandrelayprotectiondispositionproposedthenewdesignmentality,maintainstheelectricalpowersystemwitheveryefforthighlyeffective,theeconomyandthesecuritygoal.Thisgraduationprojectinviewofthe330kVtransformersubstation'scharacteristic,taketheelectricaldesignpartasacore,plansthroughtheanalysistoconstructthetransformersubstationtoenterthegoingbeyondalinedirectionandtheloadandsoonfirsthandinformation,fromaspectsandsoonreliability,security,efficiencyconsidered,hasdeterminedtheelectricalmainwiringway.Mainlyfrommaintransformer'scapacity,quantitydetermination,theloadanalyzesandcalculates,carriesontherightamountidleworkcompensation,aswellasshort-circuitcurrent'scomputationandthetransformersubstationmainelectricalequipment'schoice(includingcircuitbreaker,isolator,mutualinductorandsoon),relayprotectiondispositionaswellasanti-radarprotection'saspectsandsoondesignelaborated330kVtransformersubstationelectricitypartdesignmentality,designprocedure,andwhenchoicehascarriedontheessentialcomputationandtheverificationtotheelectricalequipment.Atthesametime,inviewofthisdesign,completesthecorrespondingblueprinttheplan.[Keywords]Substation；Maintransformer；Electricalmainwiring；Electricalpowersystemrelayprotection....引言....................................................................11主变压器的选择........................................................21.1主变压器选择的一般原则............................................21.1.1主变压器台数的选择..........................................21.1.2主变压器容量的选择..........................................21.2主变压器型式选择..................................................31.2.1主变压器相数的选择..........................................3...1.2.2绕组数的选择................................................31.2.3绕组连接方式的选择..........................................41.2.4主变调压方式的选择..........................................41.2.5容量比的选择................................................51.2.6主变压器冷却方式的选择......................................51.3主变压器的选择结果................................................51.4变电站站用变选择..................................................51.4.1站用变的选择................................................61.4.2站用电接线图................................................62电气主接线............................................................72.1电气主接线概述....................................................72.1.1电气主接线的基本要求.........................................72.1.2主接线设计的原则............................................82.2主接线的基本接线方式选择..........................................82.2.1单母线接线及单母线分段接线..................................92.2.2双母线接线及双母线分段接线.................................102.2.3带旁路母线的单母线和双母线接线.............................112.2.4一台半断路器双母线接线.....................................122.2.5桥形接线...................................................132.3主接线方案的比较选择.............................................132.4电气主接线设计图.................................................143短路电流的计算.......................................................153.1概述.............................................................153.2短路电流计算相关容...............................................153.2.1短路电流计算的目的.........................................153.2.2短路电流计算的一般规定.....................................163.2.3短路计算的基本假设.........................................163.2.4短路电流计算的步骤.........................................173.3变压器电抗标幺值计算.............................................173.3.1变压器参数的计算...........................................18...3.3.2主变压器参数计算...........................................183.4短路点的短路计算..............