电力系统课程设计

1课程设计说明书课程名称电力系统课程设计设计题目电力网络设计专业电气工程及其自动化班级04电气（3）班学号姓名座号指导教师华南理工大学电力学院二八年一月A1A0A2A3A4A5A6A7A92第一章课程设计任务书设计主要内容A校验电力系统功率平衡和确定发电厂的运行方式；B通过方案比较，确定电力系统的接线图；C选定发电厂和变电所的接线图以及变压器型号及容量；D计算电力网的功率分布和电压，确定调压方式并选择调压设备；E计算电力网的主要经济指标。设计要求A设计说明书一份；B设计图纸一张。原始资料A发电厂发电机资料项目台数容量（MW）电压（KV）功率因数152563082150105085B发电厂和变电所的负荷资料A8A10A11A12A13A14AA15A16A12A17A141A15A16A12A17A142A15A16A12A17A143A15A16A12A17A144A15A18A19A20A21A14MWA152034264037A18A22A20A21A14MWA151118142119A18A19A20A21A23A24A25A26083082083082084A18A22A20A21A23A24A25A2607808108108081A18A19A20A21A27A28A22A2950005500550055005000A30A31A32A33A12A34A14KVA1566101010A35A36A28A37A38A39A40A262530253025A30A36A28A37A38A39A40A263030353530A41A34A42A43A44A45A44A45A46注意1发电厂的负荷包括发电厂的自用电在内；2建议采用的电力网额定电压为110KV。A47A48A49A50A51A52A53A54A553C发电厂和变电所的地理位置图发电厂和变电所的地理位置KML1249L1337L3448L2448L1034L2030L3034L40331234A56A57A58A59A59A60A61A624A59A59A63A61A64A65A57A66A5811000000A61A67A68A69A70A71A72A73A744第二章负荷合理性校验21负荷合理性校验根据最大负荷利用小时数的定义，最大负荷运行TA75A76A77A78小时所消耗的电量等于全年实际耗电量，所以应大于全年以最小负荷运行所消耗的电量，校验之。发电厂PMAXTMAX205000100000PMG76G81G27G26G25011G27G26G250G28G25G22G250变电所1PMAXTMAXG22G2355001G27G26000PMG76G81G27G26G2501G27G27G26G25015G26G25G270变电所2PMAXTMAX2G2555001G23G22000PMG76G81G27G26G2501G23G27G26G250122G25G230变电所G22PMAXTMAXG2305500220000PMG76G81G27G26G25021G27G26G2501G27G22G28G250变电所G23PMAXTMAXG22G2650001G275000PMG76G81G27G26G2501G28G27G26G2501G25G25G23G230通过G990G17860数据比较G2499G5483，发电厂及G2520变电所的最大负荷运行小时所消耗的电量G3355大于G1866全年以最小负荷运行所消耗的电量，G2375全年实际耗电量大于全年以最小负荷运行所消耗的电量，因G8504负荷G2524理。22功率平衡校验221有功功率平衡校验系统最大G7389功G13520G2524负荷PA79A80A81A79G461G103G462G103NNMAXP109105（20G71134G71126G71140G71137）148365（MW）G13792发电厂最大G7389功容量为255G71150175（MW）所以发电厂的G7389功备用容量为175G71314836526635（MW）校验发电厂的G7389功备用容量G7171G2554大于最大G7389功负荷的10G82G25G17G25G225G1141G23G27G17G22G255100G705G3001G26G17G285G70510G8因G8504发电厂的G7389功备用容量G9397G17287要G8726。A82A83A84A85A86A87A88A89A905222无功功率平衡校验系统最大G7092功G13520G2524负荷为QXMAX0G17G281G1705G75920G87AG81G11AG85G70G70G82G860G17G27G22G12G14G22G23G87AG81G11AG85G70G70G82G860G17G272G12G142G25G87AG81G11AG85G70G70G82G860G17G27G22G12G14G230G87AG81G11AG85G70G70G82G860G17G272G12G14G22G26G87AG81G11AG85G70G70G82G860G17G27G23G12G761G300100G17G251G11MVARG12G13792发电厂的最大G7092功容量为255G87AG81G11AG85G70G70G82G860G17G27G12G1450G87AG81G11AG85G70G70G82G860G17G275G12G30012G23G17G26G23MVARG2029G7092功功率备用容量为12474G252100612413（MVAR）校验发电厂的G7092功备用容量G7171G2554大于最大G7092功负荷的10G82G23G171G22G114100G17G251100G7052G22G17G28G27G70510G705因G8504发电厂的G7092功备用容量G9397G17287要G8726。223功率平衡校验结论由1）和2）可知，发电厂的有功备用容量大于最大有功负荷的10，无功备用容量也大于最大无功负荷的10，因此负荷功率满足平衡要求。224下面校验发电厂带最大负荷时一台机组故障后能否保证一二类负荷的供电，对三类负荷的供电情况如何根据发电厂的机组情况，取单个机组功率最大的50MW机组分析，G5415G1866发G10995G6937G19568G2530，校验发电厂G5114最大负荷时G14033G2554G1457G16789一G1120G12879负荷的G1391电，G2528时G16764G16782G989G12879负荷的G1391电G5785G1929。2241有功功率平衡校验系统最大G7389功一G1120G12879负荷为PMAX10G17G281G1705（200G1755G711G22G230G17G25G7112G250G17G25G711G2300G17G255G711G22G260G1755）G300G27G27G1722（G48G58）系统最大G7389功G989G12879负荷为PMAX20G17G281G1705（200G17G235G711G22G230G17G23G7112G250G17G23G711G2300G17G225G711G22G260G17G235）G300G250G1715（G48G58）G13792发电厂G8504时的最大G7389功功率容量为255125（G48G58）A91A92A93A94A95A96A97A98A996G2029发电厂的G7389功备用容量为125G713G27G27G1722G22G25G17G26G27（G48G58）一G1120G12879负荷G22G25G17G26G27G114G27G27G1722100G705G231G17G25G28G70510G705G989G12879负荷G22G25G17G26G27G114G250G1715100G705G300G251G1715G7052242无功功率平衡校验系统最大G7092功一G1120G12879负荷为QXMAX10G17G281G1705G75920G87AG81G11AG85G70G70G82G860G17G27G22G120G1755G14G22G23G87AG81G11AG85G70G70G82G860G17G272G120G17G25G142G25G87AG81G11AG85G70G70G82G860G17G27G22G120G17G25G14G230G87AG81G11AG85G70G70G82G860G17G272G120G17G255G14G22G26G87AG81G11AG85G70G70G82G860G17G27G23G120G1755）G761G300G25G22G17G231G11G48G89AG85G12系统最大G7092功G989G12879负荷为QXMAX20G17G281G1705G75920G87AG81G11AG85G70G70G82G860G17G27G22G120G17G235G14G22G23G87AG81G11AG85G70G70G82G860G17G272G120G17G23G142G25G87AG81G11AG85G70G70G82G860G17G27G22G120G17G23G14G230G87AG81G11AG85G70G70G82G860G17G272G120G17G225G14G22G26G87AG81G11AG85G70G70G82G860G17G27G23G120G17G235）G761G300G230G17G25G28G11G48G89AG85G12G13792发电厂G8504时的最大G7092功功率容量为525G87AG81G11AG85G70G70G82G860G17G27G12G28G22G17G265G11G48G89AG85G12G2029发电厂的G7092功备用容量为G28G22G17G265G713G25G22G17G231G220G17G22G23（G48G89AG85）一G1120G12879负荷G220G17G22G23G114G25G22G17G231100G705G23G26G17G275G70510G705G989G12879负荷G220G17G22G23G114G230G17G25G28100G705G26G23G175G25G705综上所述发电厂带最大负荷时一台机组故障后仍能保证一二类负荷的供电，同时有功功率够6115三类负荷的供电，无功功率够7456三类负荷的供电。A100A101A102A103A104A105A106A107A1087第三章确定电力系统的接线图31网络电压等级的确定根据设计G1231G2165书的要G8726，网G13488的电压等G13435G2474110G78G57。32网络接线方案的初步比较根据设计G1231G2165书所G13485的发电厂和变电G12461的地理位置设计G1998G23G12193网G13488接线方案，G1186G1391电G2499G19764G5627G451线G17347G5647G19283G5242G451G5332G1863数量G451G13499电G1457G6264G6984定的G19602G7143G12255G5242等G1972G1022方G19766选择G1998G1016G12193较G1260的方案，用G7481G17839行G2530G19766的G12946确比较。G5219号接线图G1391电G2499G19764G5627线G17347G5647G19283G5242G5332G1863数量G13499电G1457G6264G6984定的G19602G7143G12255G52421比较G206522G252G46G481G25比较G196022最G20652G221G22G46G481G25最G19602G22比较G2065222G27G46G4812比较G19602G23比较G206522G23G26G46G481G23比较G19602A109A110A111A112A113A114A115A116A1178通过上表对比可知方案2线G17347G15441G9994G2499G19764G5627最G20652，G1306G7171线G17347最G19283，G13499G1457G6984定最G19602。方案G23线G17347G15441G9994线G17347G19283G5242和G5332G1863数量比较G17878G1025，G1306G7171G13499G1457G6984定比较G21647G9914。G13792方案1和方案G22G2520方G19766比较G17878G1025，所以初步选取方案1和方案3，并进行网络接线方案的精确比较。33网络接线方案精确比较331潮流估算方案1S10G22G23G14G77G62G22G23G87AG81（AG85G70G70G82G860G17G272）G64G300G22G23G14G772G22G17G26G22（G48G57G36）G2528理G2499G5483S20G3002G25G14G771G26G17G23G26（G48G57G36）S30G300G230G14G772G26G17G282（G48G57G36）S40G300G22G26G14G772G22G17G280（G48G57G36）方案3S1010201220220121LLLLSLLS343049304717263049732334JJG300G220G17G25G26G14G7721G172G22（G48G57G36）S2010201210122101LLLLLSLS343049344947172634732334JJG3002G28G17G22G22G14G771G28G17G28G26（G48G57G36）S12S1G66S10（G22G23G14G772G22G17G26G22）G713（G220G17G25G26G14G7721G172G22）G22G17G22G22G14G772G175（G48G57G36）G2528理G2499G5483S30G300G22G27G17G26G28G14G772G25G1752（G48G57G36）S40G300G22G27G1721G14G7725G17G220（G48G57G36）S340G175G27G14G771G1722（G48G57G36）A118A119A120A121A122A123A124A125A1269332选择导线型号及线路阻抗计算方案1I10US31010001103732334J21G26G17G25G22G36G312G265G36I20US32010001103471726J1G25G23G17G231G36G312G265G36I30US33010001103922740J25G25G170G23G36G312G265G36I40US34010001103902337J2G221G1720G36G312G265G36所G1209根据G6788G1901G6564G13446G1881的G17176G7021G4710G451G4720G451G4730G451G4740G3355选用G47G42G45G71370的导线计算G2520G8585G4560线电G19471Z10（0G17G235G711G770G17G23G222）G22G230G175G26G17G255G711G77G26G17G22G23G23Z20（0G17G235G711G770G17G23G222）G2200G175G25G17G265G711G77G25G17G23G27Z30（0G17G235G711G770G17G23G222）G22G230G175G26G17G255G711G77G26G17G22G23G23Z40（0G17G235G711G770G17G23G222）G22G220G175G26G17G2325G711G77G26G1712G27方案3I10US3101000110323216730J1G285G17G26G28G36G312G265G36I20US3201000110397193329J1G27G25G172G23G36G312G265G36I12US3121000110352333J21G17G27G25G36G312G265G36I30US3301000110352267938J2G23G25G17G25G23G36G312G265G36I40US340100011033252138J2G230G175G23G36G312G265G36I34US33410001103221580JG26G170G28G36G312G265G36A127A128A129A130A131A132A133A134A13510所G1209根据G6788G1901G6564G13446G1881的G17176G7021G4710G451G4720G451G4712G451G4730G451G4740G451G4734G3355G18331用G47G42G45G71370的导线计算G2520G8585G4560线电G19471Z10（0G17G235G711G770G17G23G222）G22G2315G17G22G14G771G23G17G25G27G27Z20（0G17G235G711G770G17G23G222）G2201G22G175G14G7712G17G28G25Z12（0G17G235G711G770G17G23G222）G23G2822G1705G14G7721G171G25G27Z30（0G17G235G711G770G17G23G222）G22G2315G17G22G14G771G23G17G25G27G27Z40（0G17G235G711G770G17G23G222）G22G221G23G17G275G14G771G23G1725G25Z34（0G17G235G711G770G17G23G222）G23G2721G17G25G14G7720G17G26G22G25333G8503G5132进行时的电压G6451G3845及故障可能G17908G6116的最大电压G6451G3845方案1G8503G5132运行时的电压G6451G3845V1VQXPRG22G17G285G46G57V2VQXPR2G17G252G46G57V3VQXPRG23G17G255G46G57V4VQXPRG23G1705G46G57所以G5415发G10995G6937G19568时，G2499G17908成的最大电压G6451G3845为G28G17G22G46G57因G8504G8503G5132时G23G17G255G114110100G8G300G23G172G22G810G8，符G2524要G8726G6937G19568时G28G17G22G114110100G8G300G27G17G235G815G8，符G2524要G8726方案3G8503G5132运行时的电压G6451G3845V1VQXPRG26G1710G46G57V2VQXPR5G17G285G46G57A136A137A138A139A140A141A142A143A14411V12VQXPR1G1715G46G57V3VQXPRG27G17G28G23G46G57V4VQXPRG27G17G23G23G46G57V34VQXPR0G17G22G23G46G57所以节点G22的电压G6451G3845最大，为G27G17G28G23G46G57，G5415LG220发G10995G6937G19568时，功率经LG230传输，G8504时电压G6451G3845最大为V431102561430255226851421387938A1451G26G1711G46G57因G8504G8503G5132时G27G17G28G23G114110100G8G27G171G22G810G8符G2524要G8726G6937G19568时1G26G1711G114110100G815G175515G8超G1998要G8726334G5647G6249G17176方案1G5647投资线G17347投资G14G5332G1863设备投资（G22G23G711G220G711G22G23G711G22G22）2G260G7051G17G285G7111G25G25G235G22G17G25G22（万元）方案G22G5647投资线G17347投资G14G5332G1863设备投资（G22G23G711G220G711G22G23G711G22G22G14G23G28G14G23G27）1G17G285G71112G2551G25G17G25（万元）3341G5192G17828行G17165用方案1线G17347最大负荷时的G7389功G6451耗为PL1110732334222G26G17G255G3001G170G28PL2110471726222G25G17G265G300054PL3110922740222G26G17G255G300150PL411092337222G26G17G2325G300119A146A147A148A149A150A151A152A153A15412线路最大负荷G6451G13803G4579时G6980G1038由G457电G2159G13007G13491分析G458表14G161可知A155A156A157A158L1A159A155A156A157A158L2A159A155A156A157A158L3A159A155A156A157A158L4A159A160A161A162A163A164A1650G17G2720G17G27G220G17G2720G17G27G23A160A161A166A167A168A169A170A1715500550055005000最大负荷G6451耗小时数G23050G23050G23050G22500G2029G6451G13803G17165为（取电G17165G103805G1815）（1G170G28G23050G140G175G23G23050G141G1750G23050G141G171G28G22500）10000G175G300G27G232G170G25万所以G5192G17828行G17165用G729G6252G7099G17165G711G6451G13803G17165G235G22G17G25G22G27G705G711G27G232G170G25G300G27G26G27G17G225万方案3线G17347最大负荷时的G7389功G6451耗为PL11102321673022215G17G22G3001G17G26G25PL2110971933292221G22G175G3001G17G230PL121105233322222G1705G3000G170G22PL31105226793822215G17G22G3002G17G26G28PL411032521382221G23G17G275G3002G175G27PL3411022158022221G17G25G3000G1700G22A172A173A174A175L1A176A172A173A174A175L2A176A172A173A174A175L3A176A172A173A174A175L4A176L12LG22G23最大负荷功率因数0G17G2720G17G27G220G17G2720G17G27G23最大负荷利用小时5500550055005000最大负荷G6451耗小时数G23050G23050G23050G22500G23050G23050A177A178A179A180A181A182A183A184A18513G2029G6451G13803G17165为（取电G17165G103805G1815）（1G17G26G25G23050G141G17G230G23050G140G170G22G23050G142G17G26G28G23050G142G175G27G22500G140G1700G22G23050）10000G175G3001G25G25G22G170G25万所以G5192G17828行G17165用G729G6252G7099G17165G711G6451G13803G1716551G25G17G25G27G705G7111G25G25G22G170G25G3001G260G23G17G22G28万3342G5192计算G17165用按G26年收回投资计算，G2029方案1年计算费用G5647投资/G26G14年运行费用G235G22G17G25G22/G26G711G27G26G27G17G225G28G23G22G1715（万元）方案3年计算费用G5647投资/G26G14年运行费用51G25G17G25/G26G7111G260G23G17G22G281G26G26G27G171G28（万元）综上所述方案1G1038最G1260方案，G5192计算G17165用较G1314，同时电压G6451G3845较G4581G1000满足最大电压G19489G14865校验。第四章确定发电厂、变电所的电气主接线41发电厂电G8680G1039接线的确定必须G9397G17287以下基本要G87261G451必需G1457G16789发G1391电的G2499G19764G5627；2G451应具G7389一定的灵活G5627；G22G451操作应尽G2499G14033简单G451方便；G23G451经济G990应G2524理。42计算发电厂和G2476电G12461的G16282G3324功率421发电厂G2520发电机G16282G3324功率50G48G58机组视在功率SPG114COS50G1140G17G275G3005G27G17G272G48G57G3625G48G58机组视在功率SPG114COS25G1140G17G27G300G221G1725G48G57G362G17发电厂和变电G12461G2520负荷视在功率发电厂SPG114COS20G1140G17G27G22G3002G23G1710G48G57G36变电G124611SPG114COSG22G23G1140G17G272G300G231G17G23G25G48G57G36变电G124612SPG114COS2G25G1140G17G27G22G300G221G17G22G22G48G57G36变电G12461G22SPG114COSG230G1140G17G272G300G23G27G17G26G27G48G57G36变电G12461G23SPG114COSG22G26G1140G17G27G23G300G23G23G1705G48G57G36A177A178A179A180A181A182A183A184A18514分析因G1038发电厂G2520机组的单机容量G993大，G4658于G1025G4579型电厂，所G1209综G2524G6228G7427和G13475G8994G1016方面G13783G15397，G1946备G1363用G1016台G1314压G140363G46G57的G54G41G517G1663000G18110G2476压G3132和G3247台25MW的发电机组G17842接，G7512G6116G1016组G6205大单G1815接线，G6930G5335G1363用G54G417G1631500G18110G2476压G3132G994G252025G80G90发电机组G11468G17842接，G1209此G19489G1314G5326G16786G17165用和G7097G5132G6451G13803G727G2490G1363用一台G1314压G1403105G46G57的G54G41G517G1663000G18110G2476压G3132和50MW的发电机组G17842接。G19480G11468G1863110G46G57G2476压G3132G17176G7021型号额定G20652压（G46G57）额定低压（G46G57）联结组标号G6451耗（G46G58）空载电流（G8）G19471抗电压（G8）空载负载SFG26G22150011022G175G8G25G17G22YN，D11G22G27G1751G23G270G17G2710G175SFPG26G25G2200011022G175G8G25G17G22YN，D11G255G1702G2500G17G2510G175SFPG26G25G2200011022G175G810G175YN，D11G255G1702G2500G17G2510G175根据G457发电厂电G8680G458G1881容和此G8437G16786计的要求，确定3G12193接线方案因G1038发电机G2520单机容量G3355大于25MW，G13783G15397G2052有G1863G16786计G16280G12255对选用单G8609线分G8585接线G993G5483G17241过24MW的G16280定，所G1209确定G2520方案G102563G46G57电压级G8609线G1038G2464G8609线分G8585接线G5430G5347G727G1379250MW发电机组G11464接通过G2476压G3132G17842接G2052110G46G57G1039接线上，G1000G1866G1025一台25MW发电机组用G1328厂用电。方案1110G46G57主接线采用单母分G8585G5114旁G17347接线方式，平时分G5332运行，以减少G6937G19568时短G17347电流，对重要用户G2499用接在不G2528分G8585G990的双回G17347G17839行G1391电。方案2110G46G57主接线采用双母线接线，G1998线侧G5114G7389旁G17347母线，并设G7389专用旁G17347断G17347器，以G1457G16789G1866G1391电的G2499G19764G5627和灵活G5627。方案G22110G46G57主接线采用一台半断G17347器接线方式，并使用交叉接线，使G5483运行的G2499G19764G5627和灵活G5627很G20652，并在检修母线或回G17347断G17347器时不必用隔离G5332G1863G17839行大量倒闸操作，并且调G5242和扩建方便。分析方案1单母分G8585G5114旁G17347接线的主接线比较简单，费用也比较低，G1306G2499G19764G5627却比较低。方案2双母G5114旁母的接线方式的主接线结构和建设费用G17878G1025，G2528时G14033G1457G16789比较G20652的G2499G19764G5627和灵活G5627。方案G22一台半断G17347器接线，具G7389很G20652的G2499G19764G5627和灵活G5627，G2528时检修G451调G5242和扩建也方便，G1306主接线最复杂，建设费用也最G20652。因此最G13468G1927定G18331用方案2的接线方G5347。A177A178A179A180A181A182A183A184A18515SFP76300025MW25MW25MW25MW25MW变电所1变电所2变电所3变电所4SFP763000SFP76300050MW63KV110KVW1W2W3W4厂用电方案1110G46G57G1039接线G18331用单G8609分G8585带G7061路接线方G5347A177A178A179A180A181A182A183A184A18516SFP763000厂用电25MW25MW25MW25MW25MW变电所1变电所2变电所3变电所4SFP763000SFP76300050MW63KV110KVW1W2W3W5W4方案2110G46G57G1039接线G18331用G2464G8609线接线，G1998线G1403带有G7061路G8609线A177A178A179A180A181A182A183A184A18517SFP763000厂用电25MW25MW25MW25MW25MW变电所1变电所2变电所3变电所4SFP763000SFP76300050MW63KV110KVW1W2W3W4方案3110G46G57G1039接线G18331用一台G2334G7041路G3132接线方G5347，并G1363用G1144G2461接线A177A178A179A180A181A182A183A184A1851843G2476电所G1039接线的确定变电G12461G2520负荷视在功率变电G124611SPG114COSG22G23G1140G17G272G300G231G17G23G25G48G57G36变电G124612SPG114COS2G25G1140G17G27G22G300G221G17G22G22G48G57G36变电G12461G22SPG114COSG230G1140G17G272G300G23G27G17G26G27G48G57G36变电G12461G23SPG114COSG22G26G1140G17G27G23G300G23G23G1705G48G57G36分析G13783G15397G2052G2476电所的供电可G19764G5627，G8611个G2476电所G18129G4570G4445G160252台G2476压G3132，G1209保证G3324一台G2476压G3132发G10995故障G6122G13785G1584电检修时，G2490一台G2476压G3132仍能传输大部分功率，因此G1209传输G2476电G1246170的功率G1038标G1946，计算G2476压G3132的功率。变电G124611SPG114COSG260G8G22G23G1140G17G272G260G8G3002G28G1702G48G57G36变电G124612SPG114COSG260G82G25G1140G17G27G22G260G8G30021G17G28G22G48G57G36变电G12461G22SPG114COSG260G8G230G1140G17G272G260G8G300G22G23G1715G48G57G36变电G12461G23SPG114COSG260G8G22G26G1140G17G27G23G260G8G300G220G17G27G23G48G57G36结论根据计算的结果，G2476电G124611选用G1314压G1403G103863G46G57的G54G417G1631500G18110G2476压G3132G727G2476电G124612选用G1314压G1403G1038105G46G57的G54G417G1625000G18110G2476压G3132G727G2476电G124613选用G1314压G1403G1038105G46G57的G54G417G1640000G18110G2476压G3132G727G2476电G124614选用G1314压G1403G1038105G46G57的G54G417G1631500G18110G2476压G3132。G19480G11468G1863110G46G57G2476压G3132G17176G7021型号额定G20652压（G46G57）额定低压（G46G57）联结组标号G6451耗（G46G58）空载电流（G8）G19471抗电压（G8）空载负载SFG262500011022G175G810G175YN，D11G222G17512G220G17G2710G175SFG26G22150011022G175G8G25G17G22YN，D11G22G27G1751G23G270G17G2710G175SFG26G22150011022G175G810G175YN，D11G22G27G1751G23G270G17G2710G175SFG26G23000011022G175G810G175YN，D11G23G25G1701G26G230G17G2710G175根据G457发电厂电G8680G458G1881容和此G8437G16786计的要求，确定2G12193接线方案因G1038从发电厂升压G1998来的输电线路是G2464回线，所G1209这G12193情况下宜G18331用桥G5430接线，同时桥G5430接线只用3台G7041路G3132，比具有G3247条回路的单G8609线接线节省了1台G7041路G3132，并G1000没有G8609线，G6249G17176省，但可G19764G5627G993高，只适用于G4579容量发电厂G6122G2476电G12461。G2490外110G46G57线路，可G18331用单G8609线带G7061路的接线方G5347。A177A178A179A180A181A182A183A184A18519方案1采用桥形接线，G1866G1025内桥接线G17878用于线G17347较G19283和变压器不需要经G5132切换的G5785G1929，外桥接线G8503好相反，G17878用于线G17347较短和变压器需要经G5132切换的G5785G1929。方案2采用单母线G5114旁G17347母线的接线，因为G7389专用旁G17347断G17347器的旁G17347母线，所以G2499G19764G5627G7389极大地提G20652，G1306增加了一台旁G17347断G17347器的投资。WL1WL2QF3QF1QF2110KV110KV方案1外桥接线A177A178A179A180A181A182A183A184A18520110KVW1W2110KV方案2G18331用单G8609线带G7061路G8609线的接线结论方案1没有专门的G8609线，G13792G1000G7041路G3132G6249G17176较G4581，所G1209结G7512简单，同时适用于线路较短和G2476压G3132需要G13475G5132切换的情况，符G2524G16786计情况的要求G727方案2可G19764G5627高，但是需要架G16786G8609线，所需G7041路G3132较多，需要较多G6249G17176，因此选用方案1。A177A178A179A180A181A182A183A184A18521第五章潮流计算，确定变压器分接头51G13007G13491参G6980计算利用电力系统分析第G1120章的内容计算潮流计算所需的线G17347和变压器的G19471抗参数。511计算线路阻抗，从33章可知Z10（0G17G235G711G770G17G23G222）G22G230G175G26G17G255G711G77G26G17G22G23G23Z20（0G17G235G711G770G17G23G222）G2200G175G25G17G265G711G77G25G17G23G27Z30（0G17G235G711G770G17G23G222）G22G230G175G26G17G255G711G77G26G17G22G23G23Z40（0G17G235G711G770G17G23G222）G22G220G175G26G17G2325G711G77G26G1712G27512计算G2476压G3132阻抗和空载G6451G13803计算G2476压G3132阻抗和空载G6451G13803所需参G6980变压器型号空载G6451耗PA186（G46G58）短G17347G6451耗PA187（G46G58）G19471抗电压UG86G8空载电流IA186G8SFPG26G25G22000/110G2552G28G2610G1750G17G25SFG26G221500/110G22G27G1751G28010G1750G17G27SFG2625000/110G222G1751G25010G1750G17G27SFG26G230000/110G23G252G22510G1750G17G27变压器的G19471抗计算公式TZTRG14G77TXNNSNNSSVUJSVP222100G5415计算变电所的变压器G19471抗时，因为变电所的变压器G7171并联运行，所以G19471抗应该为一半。变压器的空载G6451耗计算公式0S（0PG14NSIJ1000）2G13475过计算，G2520G2476压G3132型号G451阻抗G451空载G6451G13803见下表变压器25G48G58发电机端50G48G58发电机端变电所1变电所2变电所G22变电所G23变压器型号SFPG26G25G22000/110SFPG26G25G22000/110SFG26G221500/110SFG2625000/110SFG26G230000/110SFG26G221500/110变压器G19471抗ZA1880G17G2805G14G7720G171G25G260G17G2805G14G7720G171G25G261G1715G27G14G7720G171G25G261G175G23G28G14G7725G17G2310G17G27G27G28G14G7715G17G27G2711G1715G27G14G7720G171G25G26变压器空载G6451耗SA186空载G6451耗0G171G22G14G770G17G265G250G171G22G14G770G17G265G250G170G26G26G14G770G1750G230G170G255G14G770G17G230G170G282G14G770G17G25G230G170G26G26G14G770G1750G23A189A190A191A192A193A194A195A196A1972252最大负荷潮流计算521G2476电所端G2476压G3132电阻G6451G13803JXRVQPST222ST1G3000G171G255G14G772G17G27