某厂总降压变电站供电设计

课程设计说明书NO1某厂总降压变电站供电设计一、设计的目的1通过课程设计巩固工厂供电的理论知识，设计一个关于工厂总降压变电站。2了解变电所设计的基本方法，了解变电所电能分配等各种实际问题，培养独立分析和解决实际工程技术问题的能力，同时对电力工业的有关政策、方针、技术规程有一定的了解。3在计算绘图、编号、设计说明书等方面得到训练，为今后的学习工作奠定基础。设计思路1总降压变电站主结线的设计。分析原始资料，列出技术上可能实现的多个方案，经过分析比较，确定最优方案。2短路电流的计算。根据电气设备的选择和继电保护的需要，确定短路G9869和G17828G15904方G5347，计算G989G11468短路电流G5194列出G8731总G15932。3G20652压电气设备选择G2462G7669G20576。G2265G6336G7041路G3132，G19560G12175G5332关，G1126G5875G3132，G4560线G6142面和G3423号，G13489G13548G4388等设备的选择和G7669G20576。G23继电保护。G2265G6336继电保护G16025G13634的选择G2462G1866G6984定计算，G6323定继电保护原理。1基础资料11全厂用电设备情况G321G17139G14667G3835G4579G2462G12879G3423G11004电设备总G4445G16025G4493G18339G726G25G253G19G78G90计算G17139G14667G7081G19G78G89G1403G709有G2163G726G23G2422G78G90G727G7092G2163G7261G23G19G24G78G89G68G85A1A2A4A0A3A5A6A7A8A9A12A10G5219号G17722G19400G2529G12228G17139G14667G12879G3423计算G17139G14667G51A11A13G11G46G58G12G52A11A13G11G46G57G36G53G12G54A11A13G11G46G57G36G121G12366气压G13565G17722G19400G44G26G27G191G27G19G27G19G192G10088G2058G6116G3423G708G8181G1867G709G17722G19400G44G24G25G191G24G19G24G27G193G10088G2058G6116G3423G708G10088G2058G709G17722G19400G44G24G28G191G26G19G251G23G23后G2164工G708G11964G6255G709G17722G19400G44G25G24G1922G19G25G27G25G24后G2164工G708G4565G6521G709G17722G19400G44G24G25G191G24G19G24G27G19G25配料G17722G19400G443G25G191G19G193G26G23G26G19161G9821G6163G44G232G1911G19G233G23G27厂G2318G1866G4439G17139G14667G708一G709G44G44G44G44G44G23G19G191G25G27G233G23G28厂G2318G1866G4439G17139G14667G708G1120G709G44G44G44G44G44G23G23G192G19G19G23G273G1861计G23G26G25G191G23G23G27同时G13007G6980G19G28G24G19G28G26G1852厂计算G17139G14667G23G24221G23G19G24G23G263G242G23大学课程设计说明书NO2G322本厂为G989G10689工作G2058，G1852厂工作时G6980G27G26G25G19G4579时，最G3835有G2163G17139G14667G2045G11004G4579时G6980G24G25G19G19G4579时。G323G1852厂G17139G14667分G5079G726G16277厂G2318G5191面G5079G13634图G1852厂设G24个G17722G19400变电站G726G551为1A14G17722G19400供电G727G552为2A14、3A14G17722G19400供电G727G553为G23A14、G24A14G17722G19400供电G727G55G23为G25A14、G27A14G17722G19400供电G727G55G24为G26A14、G28A14G17722G19400供电。A15A2A0A16A17A18A19A20A1512电源情况G321工作电G9316本厂G6323G11013G17329G1866G24G1856G18336G3800的G36变电站G6521一3G24G46G57G7562G12366线路，线路G18331G11004G47G42G45G163G24G19062G14467G19121G13490线供电。G36变电站11G19G46G57G8609线短路G4493G18339为1G281G27G48G57G36，基G1946G4493G18339为1G19G19G19G48G57G36，G36变电站G4445G16025两台G54FG54G47Z131G24G19G19G46G57G36/11G19G46G57G989卷变压G3132，G1866短路电压UA21A22A231G19G24，UA21A22A241G26，UA23A22A24G25。最G3835G17828G15904方G5347G726按G36变电站两台变压G3132G5194列G17828G15904考虑G727最G4579G17828G15904方G5347G726按G36变电站两台变压G3132分列G17828G15904考虑。G322备G11004电G9316G6323G11013B变电站G6521一1G19G46G57G7562G12366线路作为备G11004电G9316，线路G18331G11004G47G42G45G1612G19G19062G14467G19121G13490线。G13007统要求G726只有工作电G9316停电时，才允许备G11004电G9316供电。沈阳大学A25A26A27A28A29A30A31A32A33A34A35A36A37A38A39A38A40课程设计说明书NO3A41A42A43A38A38A40A44A45A41G323供电部门对G2163率因G6980要求值为G7263G24G46G57供电COSG19G28G7271G19G46G57供电COSG19G28。2总降压变电站主结线的确定21主结线定义总降压变电站的电气主结线是G11013变压G3132、G7041路G3132、G19560G12175G5332关、G1126G5875G3132、G8609线G2462电缆等电气设备，按一定顺G5219连G6521组G6116的电路。22主结线基本要求对电气主结线的基本要求是G726根据G11004电G17139G14667的要求，保证供电的可靠性。电气主结线应G1867有一定的G17828G11004灵活性。结线简单，G17828G15904方便。在保证G4445G1852可靠供电的基础上，力求投资少，年G17828G15904费G11004低。23主结线方案确定根据G13007统电G9316情况，供电电压有两个方案A46A47A48。方案1G726工作电G9316与备G11004电G9316均G110043G24G46G57电压，在这个方案中，工厂总降压变电站G18331G11004内桥G5347G6521线。方案2G726工作电G9316G18331G110043G24G46G57电压，工厂总降压变电站选G11004一台主变压G3132，构G6116线路G16变压G3132单元结线，备G11004电G9316G18331G110041G19G46G57电压。24主结线特点为了保证一级G17139G14667的正常供电，决定总降压变电站G18331G11004单G8609线分段主结线方G5347。如附图一，该主结线的主要特G9869如下G726沈阳大学课程设计说明书NO4总降压变电站设一台G24G19G19G19G46G57G363G24/1G19G46G57的降压变压G3132与3G24G46G57G7562G12366线路G16变压G3132组单元结线。在变压G3132G20652压G1403G4445G16025少油G5347G7041路G3132。便于变电站的控G2058、G17828G15904和维修。总降压变电站的1G19G46G57G1403G18331G11004单G8609线分段结线，G110041G19G46G57少油G5347G7041路G3132将G8609线分G6116两段。主变压G3132低压G1403将少油G5347G7041路G3132G6521至1G19G46G57G8609线的一个分段上，而1G19G46G57的备G11004线路也经少油G5347G7041路G3132G6521在另一分段上。各G17722G19400的一级G17139G14667都G11013两段G8609线供电，以保证供电可靠性。根据规定，备G11004电G9316只有在主电G9316停止供电，G2462主变压G3132故障或检修时才能投入。因此备G11004电G9316进线G5332关在正常时是G7041G5332的，而1G19G46G57G8609线的分段G7041路G3132在正常时则是闭合的。在1G19G46G57G8609线G1403，工作电G9316与备G11004电G9316之G19400设有备G11004电G9316自动投入G16025G13634G708G36G51DG709，当工作电G9316因故障而G7041G5332时，备G11004电G9316会立即投入。当主电G9316发生故障时，变电站的操作电G9316来自备G11004电G9316G7041路G3132前的所G11004电变压G3132。3短路电流的计算为了选择G20652压电气设备，G6984定继电保护，需要计算总降压变电站的3G24G46G57G1403、1G19G46G57G1403G8609线以G2462厂G2318G20652压配电线路末端G11即G17722G19400变电站G20652压G1403G12的短路电流，但因工厂厂G2318不G3835，总降压变电站到总降压最远G17722G19400的G17329G12175不过G6980百米，因此1G19G46G57G8609线与1G19G46G57线路末端G3800的短路电流差别极G4579，故只计算主变压G3132G20652、低电压G1403G8609线两G9869短路电流。短路电流按正常G17828G15904方G5347计算，计算电路如图3所示。A49A50A51A52A53A54A55A56A57A53A52根据计算电路作出的计算短路电流的等值电路如图G23所示。沈阳大学课程设计说明书NO5A49A58A59A60A61A62A53A5231求各元件电抗,用标幺值计算设基G1946G4493G18339SD1000MVA基G1946电压UD137KVUD2105KVG13007统电抗XT已知地G2318变电站11G19G46G57G8609线的短路G4493G18339G726G54A631G281G27G48G57G36可得XA64A65KDSS标幺值实际值/基G1946值G726XA64A65KDSSG54A63A64G2460因为XA64A65KS1A64，得G726TXDKSS19181000G19G242地G2318变电站G989G13481组变压G3132的G20652压中压G13481组之G19400的电抗标幺值G726TXA66A67A68100DNTUSSA69A70A711051000331003153G24G46G57供电线路的电抗标幺值G72610221000035951337DLDSXXULG47G42G45G163G24G3423G19062G14467G19121G13490线G1972G1321G17329G121751时的电抗为G193G24G28/G46G80A72A73A74总降压变电站的主变压G3132电抗标幺值G726TX100KUDNTSS71001000145沈阳大学课程设计说明书NO632K1点三相短路电流计算G13007统最G3835G17828G15904方G5347G15等值电路如图G24。A75A76A77A78A79A80A81A82A83A84A85A86A87A88A89短路G3250路G19471抗1MAXKXTXG142TXA90A91A92G14LXG19G242G14332G14133G23G26按G7092G19492G3835G13007统计算G15计算G9869G989G11468短路电流标幺值为13KI3PI“3I3I1MAX1KX1347G192G28可求的基G1946电流G7261DI13DDSU10003371G24G25G46G36G1186而求的G461G9869G989G11468短路电流的有G2529值I3K1ID1I3K115602945KAG1926G1999电流为I3SHK1255I255451148KAK1G9869短路G4493G18339为1“KS1MAXDKSX100037428818MVAG13007统最G4579G17828G15904方G5347等值电路图G25。沈阳大学课程设计说明书NO7A93A94A95A96A97A98A99A100A101A102A103A104A105A106短路G3250路总G19471抗XKMIN0523313512G989G11468短路电流标幺值IK112510195G1866G1194计算结G7536G16277G159322。A107A108KA109A110A111A112A113A106A105A114A115A116A117A118A119A1203KI3I3SHI3KSA115A116A121A102311KDII33IIK3552I1KDXSA95A96A97A122A99A100A101A1024545114828818A95A96A97A98A99A100A101A1023053057781953133K2点三相短路电流计算G111G12G13007统最G3835G17828G15904方G5347下短路G3250路总G19471抗G726XK2MAXXB2TXLXG14TX05233/2131417742G13007统最G4579G17828G15904方G5347下短路G3250路总G19471G726XK2MIN0523313141912基G1946电流ID223DDUS5103100055KA沈阳大学课程设计说明书NO8K2G9869G989G11468短路电流计算结G7536G16277下G159323。A1233K2A124A125A126A127A128A129A130A131A132A133A134A135A1363KI3I3SHI3KSA131A132A137A13822KDXI33IIK3552I2KDXSA139A140A141A142A143A144A145A13832328165724A139A140A141A146A143A144A145A13828728773152304电气设备的选择工厂总降压变电站的各种G20652压电气设备，主要G6363G251G19G2327G1251以上的G7041路G3132，G19560G12175G5332关，G17139G14667G5332关，G10088G7041G3132，G1126G5875G3132，电抗G3132，G8609线，电缆G6915G6357G13489G13548G4388G2462G12371G3693G3883G12661等。这G1135电气各自的G2163能和特G9869不同，要求的G17828G15904G7477G1226和G16025设G10627G3671也各不同，但也G1867有G1861同G17993G4444的原则A147A148A149。电气设备要能可靠的工作，G5529G20047按正常G7477G1226进G15904选择，G5194G1000按G7041路情况进G15904G12295定检G20576。对于供电G13007统G20652压电气设备的选择，G19512了根据正常G17828G15904G7477G1226下的G20081G5242电压、G20081G5242电流等选择G7477G1226G3818，G17836应该按短路电流所G1147生的电动力G6940应G2462G9921G6940应进G15904G7669G20576。G256按正常G17828G15904G7477G1226选择，按短路G7477G1226进G15904G7669G20576G257，这是G20652压电气设备选择的一G14336原则。41在选择供电G13007统的G20652压电气设备时，应进G15904的选择G2462G7669G20576G20045G11458G16277G15932G3247A147A150A149。A151A152A153A154A155A156A157A158A159A160A161A162A163A164A165G7669G20576G20045G11458设备G2529G12228电压/G46G57电流/G36G17986G7041G4493G18339/G48G57G36短路电流G7669G20576动G12295定G9921G12295定G7041路G3132XXXXXG17139G14667G5332关XXXXXG19560G12175G5332关XXXXG10088G7041G3132XXX电流G1126G5875G3132XXXX电压G1126G5875G3132XG6915G7621G13489G13548G4388XXG3883G12661G13489G13548G4388XXG8609线XXX电缆XXXG19492流电抗G3132XXXXA166A167A151A168A169A170A171A151A172A153A154A173A161A162A164A165沈阳大学课程设计说明书NO9G20652压电气的G9921G12295定性G7669G20576G726ITTITI22ITTTIIG8609线G2462电缆的G9921G12295定性G7669G20576G726IWKALITCIAATISMIN200ALWALWIIG7041路G3132、G17139G17745G5332关、G19560G12175G5332关G2462电抗G3132的力G12295定计算G726SHIIMAXSHIIMAX电流G1126G5875G3132的力G12295定计算G726SHNNOIIK12SHIIMAXG8609线的力G12295定计算G726AIKFSHF11073217G11013于G17340G17329在两个以上，所以选择G726WMFM101423G24G46G57G1403设备，设备G2529G12228G2462G3423号G16277G15932G24A174A175A176。沈阳大学课程设计说明书NO10A177A178A179A178A180A181A182A183A184A185A186设备G2529G12228计算G6980据G20652压G7041路G3132G54G582G163G24/1G19G19G19G19560G12175G5332关G42G582G163G24G42D/G25G19G19电压G1126G5875G3132G45DG45G45G163G24电流G1126G5875G3132G47G38G58G163G24G18003G19659G3132FZG163G24U35KV35KV35KV35KV35KV35KVI8248A1000A600A150/5IKA1873A18845KVSK28818MVA1500MVAIA189SH1148KV634KA50KA212KAI2TI452034IT2T248241424”9506431G19G46G57G1403设备，设备G2529G12228G2462G3423号G16277G15932G25A174A175A176。A177A190A191A192A180A181A182A183A184A185A186A193A194A195A196A197A195A182A198A186A199A183A200A201A202A203设备G2529G6980据G20652压G7041路G3132G19560G12175G5332关电流G1126G5875G3132G19560G12175G5332关备G8892G54G491G19G161G19/G25G19G19G42G49G27G161G19G55/G25G19G19G47G36F1G19G163G19G19/G24G42G49G25G161G19G55/G25G19G19G18331G11004G42G42G161G19G20652压G5332关G7600U10KV10KV10KV10KV10KVI2749A600A600A300/5A600AIA189SH816KV52KA52KA57KA52KAI2TI322034IT2T2024”2025”1000321”2025”10KVG1403设备，设备G2529G12228G2462G3423号G16277G15932G26A174A175A176。沈阳大学课程设计说明书NO11A177A204A191A192A180A181A205A183A202A206A185A186A185A186A207A208A198A209A210A211A212A213A214A215A216A217A218A219A220A221A222A223A224A225A226A227A228A229A230A221A222A223A224A225A231A232A233A234A219A235A236A237A223A224A225A238A225A239A240A223A241A225A225A238A240KVU10A224A225A242A243A224A225A242A243A224A225A242A243AI46A244A225A225A245A246A225A225A245A241A225A225A238A240KAISH158A241A241A242A245A240A225A242A245302135202322ITI461125142MVASK2457A247A225A225A248A243A2454410KV母线选择1变压器低压侧引出线选择主变压器低压侧引出线按经济电流密度选择工作电流ICAICA5103500027494A母线计算截面SECECJCAI902749430549MM2选用标准截面6502MM的铝母线允许电流740A大于工作电流27494A，满足要求热稳定校验SMINCTII87034100011487694650MM2,满足要求动稳定校验母线采用平放装设W0167BHA2490167065A24925CMA249FISH26712510114816722928102KG/CM沈阳大学课程设计说明书NO12母线最大允许跨度已知Y700KG/CMA249FWLY10CM254341028952700102进线的绝缘子间距离取2米即可。绝缘子采用ZNA10MM破坏负荷375公斤，满足要求。210KV母线选择按发热条件选用4402MM铝母线允许电流395A大于计算电流。按上述计算的热稳定最小截面为76942MM小于4402MM满足要求。动稳定校验母线平放W0167BHA2500167044A251107CMA251根据前面计算求得FWLY10CM128410289071700102GG10高压开关柜一般宽距1M,进线柜最宽为15M，以此上述检验满足动稳定要求。由于采用标准高压开关柜，故G993G5529选择母线G6915G6357绝缘子。5继电保护的选择与整定51总降压变电站需设计以下继电保护装置G7081G709主变压器G1457G6264G7082G709G3803用电G9316进线G1457G6264G7083G709变电G1246110KV母线G1457G6264G7084G70910KVG20316电线G17347G1457G6264此G3818G17836G19668设G13634以G991装G13634G7081G709G3803用电G9316G14270动G6249G1849装G13634G7082G709绝缘G11429G4531装G13634沈阳大学课程设计说明书NO1352、主变压器保护521根据规格5000KVA变压器设下列保护G7081G709G10938G7043G1457G6264G19462G5493变压器G19093G3783G1881G18108G11713G17347G2656G8845面G19489低。G17743G10938G7043动作G994G1461G2507G727G18337G10938G7043作用于G17351G19404。G7082G709电流G17907G7041G1457G6264G19462G5493变压器线G3292G2656引出线的G3822G11468G11713G17347，动作于G17351G19404。G7083G709G17819电流G1457G6264G19462G5493G3818G18108G11468间G11713G17347G5194作为G10938G7043G1457G6264G2462电流G17907G7041G1457G6264的G2530G3803G1457G6264。G1457G6264动作于G17351G19404。G7084G709G17819负荷G1457G6264G19462G5493变压器G7424G17535的G4557G12228G17819负荷G2462G3818G18108G11713G17347引G17227的G17819G17745。按G1867G1319条件装设。522整定计算G2520G1022G1457G6264的G1867G1319G6984定计算G3926G991G311电流G17907G7041G1457G6264G17907G7041G1457G6264采用G1016G11468G993G4448G1852G7155G5430G6521G8873，动作电流G5224G17542G17819G13007G13491最大G17828G15904G7053G5347G7114，变压器G1120G8437侧G989G11468G11713G17347G1552A252A253A254。即按公G5347计算IOP1QHKCOIA2553A6KMAX1332416KAG5414算G205235KV侧IOP1QH4160G7083510G7091190AG9801G6947度按G13007G13491最小G17828G15904G7053G5347G7114G1457G6264装G13634G4445装G3800的G1016G11468G11713G17347电流G7481校验KSIA2552A6KLMIN/IOP1QH119030508702232，满足要求。G312G17819电流G1457G6264采用G989G1022电流G1126G5875器G6521G6116G1852G7155G5430G13479线G7053G5347，以G6564高G1457G6264动作G9801G6947度，G13499电器采用DJ11G3423G1457G6264动作电流按G17542G17819变压器一G8437侧可G14033出G10628的最大负荷电流G7481G6984定A252A253A254IOP1RCCOKKIWLMAXKCORCKMGHI30128503824854933A进G1849G13499电器的电流IOPTAOPKI5/150333491164A动作G7114间510KV母线G1457G6264G1