青海40MW太阳能光伏并网电站电气设计

摘要1青海40MW太阳能光伏并网电站电气设计作者：胡杨指导老师：宁联辉摘要：本文对青海40MW太阳能光伏并网电站电气一次设计以及线路继电保护的全面设计说明，其中包括主接线设计，短路电流计算，设备的选型及校验，所用电系统设计，防雷保护设计，配电装置布置设计以及线路的继电保护设计。经过对原始资料的分析，初步确立了太阳能电池板和逆变器的型号，以及电源的汇流方式，并且确立了主接线的方案，电站一共分为两个电压等级，110kV和10kV等级，主接线方案中110kV等级上采用单母线的接线形式，10kV电压等级采用的是户内电压柜的单母线分段的接线方式。极大的提高了该方案的经济性、可靠性及灵活性。此外，10KV侧出线以及二次侧的电源全部采用地下电缆。在本设计中，对上述两种方案进行了短路电流的计算和设备的选型及校验，其中短路电流的计算包括周期分量、非周期分量、冲击电流、短路容量及各种不对称短路的电流进行了较为详细的计算。在选型过程中，10KV侧使用了高压开关柜，校验时对两种方案的热效应分别采用了辛普生法和等值时间法的不同计算方法。在线路保护计算设计部分，110KV的线路均采用了南瑞继电保护电气有限公司研制开发的RCS-90系列微机型高压线路成套保护装置，这种保护动作速度快，误差小，运行维护及整定简单，方便可靠，不受运行方式限制，代表着今后电力系统继电保护发展的方向。关键字：电气一次主接线短路电流线路保护摘要2Abstract:Inthispaper,thetimethedesignoftheQinghai40MWsolarphotovoltaicgridpowerplantelectricalandcomprehensivedesignofthelinerelayinstructions,includingthemainwiringdesign,shortcircuitcurrentcalculation,equipmentselectionandcalibration,powersystemdesign,lightningprotectiondesigndistributionplantlayoutdesignandcircuitprotectiondesign.Analysisofrawdata,initiallyestablishedamodelofthesolarpanelsandinverter,aswellasthepowerofconvergence,andtoestablishaprogramofthemainwiring,powerplantsandatotaloftwovoltagelevels,110kVand10kVlevel,themainwiringwiringformofsingle-bus110kVratingprogram,the10kVvoltagelevelisasinglebussectionoftheindoorvoltagecabinetwiring.Greatlyimprovestheeconomic,reliabilityandflexibilityoftheprogram.Inaddition,the10KVsideoftheoutletandthesecondarysideofpowerusedinallundergroundcables.Inthisdesign,thesetwoprograms,short-circuitcurrentcalculationandtheselectionofequipmentandcalibration,shortcircuitcurrentcalculation,includingaperiodiccomponent,non-periodiccomponents,theimpactofcurrent,shortcircuitcapacityandavarietyofasymmetricshort-circuitThecurrentinamoredetailedcalculation.Intheselectionprocess,the10KVsideusingthehighvoltageswitchboard,checksumwhenthethermaleffectsofthetwooptionswerecalculatedusingtheSimpsonmethodandtheequivalenttimemethod.Calculatethedesignpartofthelineprotection,The110KVthelinesareusedtheNARIprotectionElectricCo.,Ltd.developedtheRCS-90seriesmicroprocessor-basedhigh-voltagelinecompletesetsofprotectivedevices,suchprotectionmovementspeed,theerrorissmall,operationandmaintenanceandtuningsimple,convenientandreliable,fromtherunwaylimit,representingthefuturedirectionofdevelopmentofpowersystemprotection.Keywords:TheprimaryelectricdesignmainconnectionShort-circuitcurrentLineProtection2008届电气工程及其自动化（电力）专业毕业论文3目录第1章绪论..............................................................................................................11.1选题的目的及意义......................................................................................11.2本课题在国内外的研究状况及发展趋势..................................................21.2.1研究现状...........................................................................................21.2.2发展趋势...........................................................................................3第2章太阳能组件和逆变器的选择....................................................................62.1太阳能电池组件的选择...........................................................................62.2并网逆变器的选择......................................................................................82.3逆变器集成方式.......................................................................................9第3章主接线方案的选择..................................................................................103.1原始资料分析.........................................................................................103.2主接线方案的拟定.................................................................................10第4章厂用电设计..............................................................................................15第5章主变选择以及短路电流计算..................................................................175.1主变压器的选择.....................................................................................175.1.1110kV/10.5kV变压器的选择.....................................................175.1.2其余变压器的选择......................................................................195.2短路电流计算.........................................................................................195.2.1概述..............................................................................................195.2.2计算假定条件和一般规定..........................................................205.2.3三相对称短路计算步骤..............................................................215.2.4非对称短路计算..........................................................................24第6章主要电气设备的选型..............................................................................276.1电气设备选择的原则.............................................................................276.1.1电气设备选择的一般原则..........................................................276.1.2技术条件......................................................................................276.1.3对断路器和隔离开关的特殊要求..............................................296.2主要电气设备的选择与校验.................................................................306.2.1110kV母线的选择......................................................................30胡杨：青