35kv变电所设计

江西理工大学南昌校区毕业设计（论文）题目：35KV总降压变电所主接线系统设计系：信息工程系专业：电气自动化班级：10自动化1班学生：罗积斌学号：10321131指导教师：催智勇职称：讲师江西理工大学2013届专科生毕业设计（论文）-1-摘要根据我国能源利用情况，供电设计的原则要求，按照设计任务书的详细要求，对该厂进行总体分析，然后着手对该机械厂高压供配电系统进行设计。在指导老师的悉心指导下，同时借助参考文献，完成该次设计。首先，对全厂的负荷进行系统计算，为确定供电系统的电力变压器、各种开关电器的容量、电力线路的截面和变电所的所址等提供依据。并且对其进行无功补偿，以减少变压器、电力线路、开关设备的功率损耗，从而减少电器元件的规格，降低它的功率损耗和电压损耗，减少投资。其次，根据本厂的实际情况和经济技术比较电力变压器，确定变电所的地址、类型以及其主接线方案，其中包括变压器容量以及台数的确定，全厂配电系统的设计。然后，按负荷情况系统地对厂区进行设计，为了校验一次设备的短路稳定度，开关电器的断流能力及电流保护装置的灵敏度，整定电流速断保护装置的动作电流，进行短路电流的计算，进而选择了电力线路和高低压电气设备。关键词：一次部分；电力变压器；无功补偿；负荷计算；电缆江西理工大学2013届专科生毕业设计（论文）-2-ABSTRACTAccordingtoChina'senergyutilization,powersupplyinaccordancewiththeprincipleofdesign,thedesignplandescriptionsofthefactory,thedetailedrequirementsforoverallanalysisofthefactory,andthensethighpowersupplysystemdesign.Intheguidance,takeinyourgroupmembers,andhelpwithmanyreferencestofinishthedesign.Firstofall,theloadcalculationsystem,todeterminethepowersupplysystemofswitchpowertransformer,electriccapacity,powerlinesandthesubstationofaddress,etc.Andonthereactivepowercompensation,toreducethetransformer,electriccircuit,thepowerswitchequipment,therebyreducingthelossofelectricalcomponents,reduceitsspecificationandvoltagelossofpowerconsumption,reducinginvestment.Secondly,accordingtotheactualsituationofoureconomyandtechnologypowertransformersubstation,anddeterminetheaddress,typesanditsmainconnectionscheme,includingtransformercapacityandthenumberofplantdistributionsystem,thedesign.Then,accordingtothesituationoffactorywithsystematicdesign,inordertochecktheequipment,switchshort-circuitstabilityofelectriccurrentflowcapacityandthesensitivityofprotectiondevice,thevelocityofelectriccurrentprotectiondevice,thecalculationofshort-circuitcurrent,andthenchoosethepowerlineandhigh-lowvoltageelectricalequipment.KEYWORDS:MAJORSYSTEM;POWERTRANSFORMER;REACTIVEPOWERCOMPENSATION;LOADCALCULATION江西理工大学2013届专科生毕业设计（论文）-3-目录摘要·············································································································-1-ABSTRACT······································································································-2-绪论·············································································································-7-第一章某机械厂基本数据···········-8-1.1工厂总平面布置图，见图1-1·········-8-1.2全厂各车间负荷情况汇总表··········-8-1.3供用电协议·················-9-1.4工厂的负荷性质···············-10-1.5工厂的自然条件···············-10-1.6总变电所设计················-10-第二章全厂负荷计算·············-12-2.1用电设备的负荷计算·············-12-2.2变压器损耗估算···············-13-2.3无功功率补偿计算··············-13-2.4变压器选择·················-15-第三章系统主接线方案的选择·········-16-3.1主接线设计的基本要求············-16-3.2变电所的主接线方式·············-17-3.3方案的比较与选择··············-19-第四章变电所位置及变压器、配电装置选择···-21-江西理工大学2013届专科生毕业设计（论文）-4-4.1变电所位置·················-21-4.2变压器选择·················-21-4.2.1所用变压器选择··············-21-4.3配电装置选择················-21-第五章短路电流的计算············-22-5.1确定计算电路及计算电抗··········-22-5.1.1计算电路图如图5-1所示·········-22-5.1.2计算电抗················-22-5.2最大运行方式下的短路点计算········-23-5.2.1d1点的短路电流计算··········-23-5.2.2d2点的短路电流计算··········-23-5.3最小运行方式下的短路点计算········-24-5.3.1d1点的短路电流计算··········-24-5.3.2d2点的短路电流计算··········-25-第六章高压电气设备的选择·····················································-26-6.135KV架空线的选择············-26-6.1.1选择导线（按照经济电流密度）······-26-6.1.2热稳定校验（按最大运行方式d2点短路）·-26-6.210kV母线的选择·············-26-6.2.1选择母线（按照最大工作电流）······-27-6.2.2热稳定的校验（按最大运行方式d2点短路）-27-江西理工大学2013届专科生毕业设计（论文）-5-6.2.3动稳定校验···············-27-6.3高压断路器的选择·············-27-6.3.1安装在变压器35kV高压侧的断路器····-28-6.3.2安装在变压器10kV低压侧的断路器····-29-6.4高压隔离开关的选择············-30-6.4.135kV侧隔离开关············-30-6.4.2校验热稳定（下列时间均取自对应断路器，后备保护取2S）：·················-30-6.4.3检验动稳定：ish≤ies·········-30-6.5电流互感器的选择·············-31-6.5.1安装在35kV高压进线侧的电流互感器···-31-6.5.2安装在10kV变压器低压侧的电流互感器··-32-6.6电压互感器的选择·············-32-6.6.135kV电压互感器的参数计算与选择····-32-6.6.210kV电压互感器的参数计算与选择····-34-6.710kV高压柜的选择············-35-第七章继电保护装置设计···········-36-7.1继电保护配置···············-36-7.1.2主变压器保护配置············-36-7.1.3瓦斯保护················-36-7.1.4差动保护················-36-7.1.5过流保护················-36-江西理工大学2013届专科生毕业设计（论文）-6-7.1.6过负荷保护···············-36-7.1.710kV线路保护配置···········-37-7.1.810kV电容器保护配置··········-37-7.2主变压器保护的继保整定··········-37-7.2.1过负荷保护···············-37-7.2.2过电流保护···············-37-7.2.3电流速断保护··············-38-7.3防雷措施的选择··············-39-7.3.1避雷器的选择··············-40-7.4变电站的进线段保护············-40-7.5接地设计………………………………………………-41-主要参考文献和书目：··············-42-附录1电气主接线图··············-43-附录2设备汇总一览表·············-44-附录3系统继电保护全图············-45-致谢·····················-46-江西理工大学2013届专科生毕业设计（论文）-7-绪论电力工业是国民经济发展中最重要的基础能源产业，是国民经济的第一基础产业，是关系国计民生的基础产业，是世界各国经济发展战略中的优先发展重点。作为一种先进的生产力和基础产业，电力行业对促进国民经济的发展和社会进步起到重要作用。与社会经济和社会发展有着十分密切的关系，它不仅是关系国家经济安全的战略大问题，而且与人们的日常生活、社会稳定密切相关。随着我国经济的发展，对电的需求量不断扩大，电力销售市场的扩大又刺激了整个电力生产的发展。随着科学技术的发展和能源经济利用的需要，变电站的设计在逐步向经济、稳定的方向发展。迄今为止，变电所的更新设计在国内外也正在逐渐形成一个与人类生活密不可分的行业。优良更新的设计不仅具有标准化、高效化、组合化等当代先进设计思想,又符合节约有效利用资源的原则,更适合当代社会发展的要求。所以是今后电力技术的一个重要发展方向。江西理工大学2013届专科生毕业设计（论文）-8-第一章某机械厂基本数据1.1工厂总平面布置图，见图1-1图1-1工厂总平面图1.2全厂各车间负荷情况汇总表车间名称Pe/kWKdcosφ电机