110kv盐北变电所设计说明书

A11A2A372A2摘要为满足经济发展的需要，根据有关单位的决定修建1座110KV盐北变电所。本工程初步设计内容包含变电所电气设计，新建的盐北变电所从110KV侧东郊变电所受电，其负荷分为35KV和10KV两个电压等级。通过技术和经济比较，现采用下列方案1内设两台三绕组变压器，电压等级为121/378/11。2110KV进线采用内桥接线形式。3本工程初步设计内容包括变电所电气设计。435KV和10KV配电装置同样采用单母线分段接线。5所用电分别从10KV两端母线获得。关键词变电所主变压器潮流计算短路计算设备选型A02A4A572A4SUMMARYFORSATISFYINGTHEDEMANDTHATECONOMYDEVELOPMENT,THEAUTHORITIESCONCERNEDDECIDETOCONSTRUCTAYANBEITRANSFORMERSUBSTATIONTHISENGINEERINGFIRSTSTEPDESIGNCONTENTSINCLUDESTHETRANSFORMERSUBSTATIONOFELECTRICDESIGNTHENEWETUPSALTAYANBEITRANSFORMERSUBSTATIONOBTAINPOWERFORMDONGJIAOSUBSTATION110KVTHEREARETWOKINDSOFLOCALLOADSINTHESUBSTATION,ONEIS35KV,THEOTHERIS10KVPASSTHETECHNIQUETOCOMPAREWITHTHEECONOMY,ADOPTTHEFOLLOWINGSCHEMENOW1THEREARETWOTHREEWINDINGTRANSFORMERSINTHESUBSTATIONVOLTAGEGRADEADOPT121KV385KVAND11KV2FOR110KVMAINELECTRICALCONNECTIONSSHALLADOPTINSIDEBRIDGECONNECTION3THE110KVENTERSTHELINE2RETURN,THEADOPTIONBUILDSTROLLEYWIRE4FOR35KVAND10KVMAINELECTRICALCONNECTIONSEMPLOYSINGLESECTIONALIZEDBUS5AUXILIARYPOWERSYSTEMGETPOWERFORMTHE10KVSECTIONALIZEDBUSKEYPHRASECHANGETOGIVEORGETANELECTRICSHOCKMAINTRANSFORMERCURRENTCALCULATIONSHORTCIRCUITCALCULATIONTHEEQUIPMENTSCHOOSETHETYPEA63A7A872A7目录第一章原始资料分析第五页第二章110KV盐北变电所接入系统设计第七页第三章110KV盐北变电所地方供电系统设计第九页第四章110KV盐北变电所主变选择第十九页第五章所用变选择第二十九页第六章主接线设计第三十页第七章主接线设计第三十三页第八章变电所电气设备选择第四十五页第九章继电保护配置第七十页A64A7A872A7110KV盐北变电所设计说明书根据河海大学电气工程及其自动化专业（函授）毕业设计任务书的要求，设计110KV盐北变电所。110KV盐北变电所，采用双回110KV线路接入系统。35KV、10KV配电线路均采用双回线供电。110KV采用内桥接线，安装两台SFPSZ975000/110三相三线圈变压器。35KV、10KV母线采用单母线分段接线。A95A10A1172A10第一章原始资料分析一、原始资料1、待建110KV盐北变电站G1186相G1732930KM的110KV盐G3490G1008G18078变电站G2475电。2、待建110KV盐北变电站G5192G17139G14667G3698G19283G10587G10385，变电站G5647G17139G14667G13783G15397G1128G5192G2469G4649G16280G2022。3、G3332G2318气G92131G5192G7380G20652气G921335G263，G5192G7380G1314气G921315G263。2G5192G5191均气G921315G263。4、待建110KV盐北变电所G2520电压G13435G17139G14667G6980据G3926G991G15932电压G12573G13435线路G2529G12228G7380大G17139G14667（MW）COSG207G17139G14667G13435G2047供电G17329G12175（KM）TMAX及G2528G7114G1058735KVA200851105000/09B1508112G17908G13452G2390110828化工G2390200827G1930G9872G23901508511010KVA30851153500/085B2085225G8623G13454G2390108210G8712G8889G23901208215G13454G13467G23900808210G8712G2390208115二、对原始资料的分析计算G1038G9397G17287电G2159系统G4557G7092G2163的G19668要，G19668要G3324用G6155G1403装设电G4493器，G17839G15904G7092G2163G15929G1619，G1363用G6155的G2163G10587G3252G6980G6564G20652，35KV线路用G6155G2163G10587G3252G6980G6564G20652G205209G1038G4464，10KV线路用G6155G2163G10587G3252G6980G5224G993G1314G112209。根据G2419G3999G17176G7021G1025的G7380大G7389G2163及G16855G6984G2530的G2163G10587G3252G6980，G12651G1998G7380大G7092G2163，G2499G5483G1998G1209G991G6980A126A13A1472A13据电压G12573G13435线路G2529G12228G7380大G7389G2163（MW）G7380大G7092G2163（MVAR）COSG207G17139G14667G13435G2047TMAXG2528G7114G1058735KVA2091909150000G7149B15727091G17908G13452G239011533092化工G239020919092G1930G9872G23901572709110KVA314609135000G71485B2092092G8623G13454G23901049092G8712G8889G239012058092G13454G13467G239008039092G8712G23902092091A127A13A1472A13第二章110KV盐北变电所接入系统设计一、确定电压等级G17767电线路电压G12573G13435的G11842G4462G5224G12538G2524G3281G4490G16280G4462的G7643G1946电压G12573G13435。G17885G6333电压G12573G13435G7114，G5224根据G17767G17877G4493G18339G2656G17767电G17329G12175，G1209及接入电G13605的G20081G4462电压的G5785G1929G7481G11842G4462，G17767G17877G4493G18339G5224G16825G13783G15397变电所G5647G17139G14667G2656G1128G5192G2469G4649G16280G2022。G3252G8504待建110KV盐北变电所的G7380G20652电压G12573G13435G5224G1038110KV。二、确定回路数110KV盐北变电所建G6116G2530，所供用G6155G1025G4396G3324G265、G266G12879G18337要G17139G14667，G3252G8504110KV盐北变电所G5224采用双回110KV线路接入系统。三、确定110KV线路导线的规格、型号G11013G1122待建110KV盐北A15A16A17A18A19A20A16110KV盐G3490G1008G18078变电站30KM，G3800G1122G5191G2419河G13605G3332G2318，G3252G8504G5224采用G7562G12366线路，G4560线G17885G6333LGJG3423。四、110KVA21A22A21A22导线截面选择导线截面积选择的一般方法是先按经济电流密度初选导线标称截面积，然后进行电压损失的校验1、待建110KV盐北变电所G5647G17139G14667的计G12651G97SA23A24G32PA23A24G14JQA23A24G322015112015J919G14727G14533G14919G14727G14G3281G14J3825G97SA23A24（1G145）A25（81G14J3825）1281037G14J49SA23A241148G97SA26A27G32PA26A27G14JQA26A27G323G142G141G1412G1408G142G14J146G14092G14049G14058G14039G14092G3210G14J476G97SA26A27（1G145）A25（10G14J476）128128G14J61SA26A27G32142G97SA26A26A27G32KA26A26A27KA23A24G97SA23A24G14KA26A27G97SA26A27（1G145）A25G320950981G14J3825G1408510G14J476105A25G32987G14J4665SA26A26A27G32987A28G144665A28G321092COSG32PA26A26A27/SA26A26A27G32987/1092G3209A298A30A3172A302、根据TA32A33A34查图31，软G4560线经济电流密度G15932，G11842G4462JA35A36PA23A24TA32A33A34A37A25G14PA26A27TA32A33A34A38A39815000G14103500TA32A33A34G32G32G324835小G7114PA23A24G14PA26A2781G1410查图31G5483JA35A36115（A/MMA28）3、计G12651G4560线的经济截面积SA40，查附G15932121找G1998SA41IA4205SA26A26A27/（3UA43）051092/173211010A23SA42G32G32G32G322492MMA28JJ1154、结论G17885取G4560线G16280格G10382回LGJ240/405、G4557所G17885G4560线G17839G15904校验；1、按机械强度校验SA41G32LGJ240/40大G1122LGJ35，G12538G2524要求。2、接电晕校验SA41G32LGJ240/40大G1122LGJ70，G12538G2524要求。（3）、按电压降校验正常运G15904G7114NG322PRG14QX9870123046650430UG32G321002UA43A442110A44381102AG20081G4462G5332G7041电流校验110KV母线三相稳态G11713路电流I4271KALW25110/1250G7041路器的G20081G4462G5332G7041电流25KAG12538G2524要求。动稳G4462校验110KV母线G11713路三相冲击电流IA239A240G32783KALW25110/1250G7041路器的极限通过电流IA241A242G3225KAIA239A240IA234A235A236A2371326AG20081G4462G5332G7041电流校验35KV母线三相稳态G11713路电流I4728KALW835/1600G7041路器的G20081G4462G5332G7041电流25KAG12538G2524要求。动稳G4462校验35KV母线G11713路三相冲击电流IA1A01984KALW835/1600G7041路器的极限通过电流IA234A425KAA25348A254A25572A254IA1A0IA234A235A236A237464AA25349A254A25572A254G20081G4462G5332G7041电流校验35KV母线三相稳态G11713路电流I4728KALW835/1600G7041路器的G20081G4462G5332G7041电流25KAG12538G2524要求。动稳G4462校验35KV母线G11713路三相冲击电流IA1A01984KALW835/1600G7041路器的极限通过电流IA234A425KAIA1A0IA234A235A236A237820AG20081G4462G5332G7041电流校验10KV母线三相稳态G11713路电流I4224KAZN2810/1000G7041路器的G20081G4462G5332G7041电流315KAG12538G2524要求。动稳G4462校验10KV母线G11713路三相冲击电流IA1A0584KAZN2810/1000G7041路器的极限通过电流IA234A480KAIA1A0IA234A235A236A237246AG20081G4462G5332G7041电流校验10KV母线三相稳态G11713路电流I4224KAZN2810/630G7041路器的G20081G4462G5332G7041电流315KAG12538G2524要求。动稳G4462校验10KV母线G11713路三相冲击电流IA1A0584KAZN2810/630G7041路器的极限通过电流IA234A480KAIA1A01102A动稳G4462校验110KV母线G11713路三相冲击电流IA11A12G32783KAGW4110/1250G7041路器的极限通过电流IA14A15G3225KAIA11A12IA5A6A7A81326A动稳G4462校验35KV母线G11713路三相冲击电流IA31A321984KAA3354A34A3572A34GW535/1600G19560G12175G5332G1863的极限通过电流IA36A3725KAIA31A32IA36A47A48A49464A动稳G4462校验35KV母线G11713路三相冲击电流IA31A321984KAGW535/630G19560G12175G5332G1863的极限通过电流IA36A3725KAIA31A32IA36A47A48A49820A动稳G4462校验10KV母线G11713路三相冲击电流IA31A32584KAGN1910/1000G19560G12175G5332G1863的极限通过电流IA36A3780KAIA31A32IA36A47A48A49246A动稳G4462校验10KV母线G11713路三相冲击电流IA31A32584KAGN1910/630G19560G12175G5332G1863的极限通过电流IA36A3780KAIA31A321326A所G1209预G17885LGJ2400导线2、校验热稳G4462校验EPTSCIS4MINA114158553871028723MINMMSSA1152400MMA116SA109A117A118158MMA116G12538G2524要求动稳G4462校验G3252G1038G17885用G4560线SA1152400MMA11635MMA116G9397G17287G7562G12366线路的安全机械强度要求，故G993必校验。通过G1209上校验LGJ2400G4560线G12538G2524条G1226。（二）10KVG1403母线G17885G6333（硬母线）A11968A120A12172A1201、按G7380大持续工G1328电流G17885G6333G4560线G17745面S即IA108A109A110A111KA112IA113；IA108A109A110A111820A待建变电所G7380热月G5191均气G9213G103835G263，查G15932G5483KA122G32089AKIQG921890820MAXIA113921A820A所G1209预G17885LMY638G5191放2、校验热稳G4462校验EPTSCIS4MINA114IA123A124A125224KA；C171；TA126A12736824631711042223MINMMSSA115638504MMA116SA109A117A118248MMA116G12538G2524要求动稳G4462校验A128A129A130A131A1316910A132PA11010731822MAXACHPWLIIA133A134584；L12M；025；W0167BHA1165310A135A132；B0008M；H0063；1P1016410103525012145873162622MAXAA109A110A111A136符合条件通过G1209上校验LMY638G5191放，G12538G2524条G1226。A13769A138A13972A138八、消弧线圈设计35KV供电系统采用非直接接G3332系统，当电G4493电流大G112210AG7114，系统G2469生单相接G3332G7114G4570产生弧光过电压，G4557供电G2499G19764性G2656电气设G3803构G6116威胁，故G5224装设消弧线圈AALUIKMLNC104994353501350194210781210G3252G8504，本变电站暂G993G19668要安装消弧线圈。A14070A141A14272A141第八章继电保护配置电网继电保护配置的原则是首先满足继电保护的四项基本要求，即满足选择性、速动性、灵敏性、可靠性。然后各类保护的工作原理、性能结合电网的电压等级、网络结构、接线方式等特点进行选择，使之能够有机配合起来，构成完善的电网保护。一110KV部分110KV采用了内桥接线，所以在110KV不需要装设保护。二35KV部分线路保护在35KV小接地电流系统的线路上，应装设反映相间故障和单相接地故障的保护装置。考虑反映相间故障装设两段式电流保护限时电流速断保护、定时过流保护。保护动作于出线断路器，保护采用两相式接线。加装三相一次重合闸。反映单相接地故障，加装反映零序电压的接地信号装置，单相接地时发出信号。母联开G1863保护加装G5114时限的定时过流保护，作G1038母线G1817电时的保护。三10KV部分线路保护在10KV小接地电流系统的线路上，应装设反映相间故障和单相接地故障的保护装置。考虑反映相间故障装设两段式电流保护限时电流速断保护、定时过流保护。保护动作于出线断路器，保护采用两相式接线。加装三相一次重合闸。反映单相接地故障，加装反映零序电压的接地信号装置，单相接地时发出信号。母联开G1863保护加装G5114时限的定时过流保护，作G1038母线G1817电时的保护。A14371A144A14572A144一、主变压器保护配置1、瓦斯保G6264G1328G1038变压器的主保G6264，G2465G5224变压器油箱内部故障，包括绕组的相间G11713路，接G3332G11713路，匝间G11713路G1209及铁芯烧损，油面降G1314G12573。轻瓦斯动G1328G1122信号，G18337瓦斯动G1328G1122G7041G5332变压器G2520G1403G7041路器。2、纵G5058保G6264G1328G1038主变压器的主保G6264，G2465G5224变压器绕组、套G12661G2656引G1998线上的相间G11713路，大电流接G3332系统G1403绕组G2656引G1998线的单相接G3332、G11713路G1209及绕组匝间G11713路，采用三相CT分G2047装G1122主变三G1403四点上用专用的CT。3、G3809G2524电压启动的G4462G7114限过流保G6264G7171瓦斯保G6264、纵G5058保G6264的G2530G3803保G6264，G2465G5224G2469生G2520种G993G4557G12228G11713路G7114G1998G10628的G17139序电压。4、零序电流保G6264G2465G5224变压器外部接G3332G11713路。5、过G17139G14667保G6264G2465G5224变压器G4557G12228过G17139G14667，保G6264接G1122一相电流上，常延G7114动G1328G1122信号，G2656过流保G6264G1861用一G1022CT。二、母线保G62641、35KV单母线分段分列运G15904，G993采用专门的保G6264，当母线故障G7114，G2499G11013变压器35KVG1403G7041路器跳G5332切除故障。2、10KV单母线分段分列运G15904，G993采用专门的保G6264，当母线故障G7114，G2499G11013变压器10KVG1403G7041路器跳G5332切除故障。三、线路保G62641、110KVG17839线G3252G1038110KV盐北变电所G3800G3324系统的G2475电G12483，故110KVG17839线G993设保G62642、35KV线路保G6264电流速G7041保G6264、G4462G7114限过流保G6264二段式电流保G6264、快速G18337G2524G19404（1）G265段电流速G7041保G6264G1328G1038主保G6264，G2465G5224G1122相间故障G7114G3252电流G3698大G13792瞬G7114动G1328的电流保G6264，保G6264线路全G19283的1520。（2）G266段G4462G7114限过流保G6264，G1328G1038G265段电流速G7041保G6264的G2530G3803保G6264，G993仅能保G6264本线路