华丰煤矿短路电流计算书.docx

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1、华丰煤矿短路电流计算书（最大运行方式）计算人:审核人:2009年12月一、已知条件：楼德变电站110KV母线短路容量为819MVA,35KV华丰线短路容量为238MVA,华丰电厂三台机组(2台QF-6-2型， Sle=7.5MVA,1台 TQC-2-25000KW 型，S2e=31.25MVA),电厂两台主变： SFS9-31500KVA/110KV,阻抗电压为：%=110KV35KV: Uki-2%=9.82%110KV6KV :Uk3%=17.7%35KV6KV :几-3%=6.41%电厂通过两台主变与110KV楼华线并网，电厂两条35KV线路(LGJT20mm2一0.944km)向新站供

2、电，其中一条回路从新站转供禹村.新站两台主变为： SF9-16000KVA/35KV,阻抗电压为：7.97%,电厂6KV母线，IIIII段间电抗器为 GKSK-10型，UK%=10%, Ie=3000AMV ALGJ-95212km1、选取基准容量:Sj =100MA,选取基准电压,电流：%尸115kv,则Ijl =-3L.=J0=0.502KA ,Vj2=37KV, Ij2=V3VB1 V3*l 1556KA , Vj3=6.3KV, Ij3=9.16KA月*37g*6.32、计算各元件电抗标么值：、楼德变电站电抗:Xl=S3/Sd=100/819=0.1221、35KV 华丰线电源电抗：X

3、=S3/Sd=100/238=0.4202110KV线路电抗:X2=XO1S3=0. 436*12*100/1152=0. 0396、电厂主变110KV侧电抗:ukl%=l/2(uk1-2%+uk1-3%-uk2-3%)=l/2(9.82+17.7-6.41)=10.555%X2=ukl%*100/31.5=10.555%*100/31.5=0.355=X4电厂主变35KV 侧电抗：uk2%=l/2(uks+ ukb uk2-3%)=1/2(9.82+6.41-17.7)=0.735%,则:X10=-0.735%*100X31.5=-0.0233=0=Xh电)主变6KV 侧电抗：uks%1/2

4、(uk-2%+ uki-3% uk2-3)=1/2(17.7+6.41-9.82)=7.145%,则:Xs=X6=7.145%*100/31.5=0.2268电厂 I 路阻抗：Xi2=0.4*0.944*100/372=0.0276发电机:QF-6-2型：X7=X8=L 65, Sfl=7.5MVA, TQC-2-25000KW 型X9=0.512, Sf3=31.25MVA新站主变：X13=7.97%*100/16=0.535KV 华丰线线路电抗：X=0.406*12*100/372=0.397画等值电路如右图：si14/0.21744/0.335Wd47/1.65令xl512/0.0276

5、 dlsFX16Xi5=X3/X4=0.335/2=0.1905Xi6=(X5+X9)/(X6+X7/X8)=0.4305Xh= X14+X15=0.382Xi8X17/X)6=0.2025二、系统最大运行方式下短路电流计算：(最大运行方式为三台机组正常发电，电厂II、in段母线间电抗器不投运)1、求&点(新站35KV母线)短路参数：求分布系数：C,=0.2025/0.382=0.53C2=0.2025/0.4305=0.47Ci+C2=l,计算正确。Xi9(Xi6Xh)+X120.235求各支路转移电抗：Xi-dl*=0.235/0.53=0.443=X20si0、2021S 0.4435

6、K?I 7 dlXf-dr=0.235/0.47=0.5=X21190.235 r dl求各支路计算电抗:系统：X2o=0.443电厂：X22=X2i*Sef/Sj=0.5*3L25+15=0.231100求电流标么值：系统:L*”=Io.2-i*= lo.oi*=l/0.443=2.653电厂:据 X22=0.231,约:L*”=4.15, I。？；=3,二：=2.466短路参数：系统：I”=Io.2-尸1*2.653*1.56=4.138KASi”= So,2-1= Ssi=2.653*100=265.3MVA电厂：L”=4.15*半旦=4.44*0.722=2.995KAJ3*37Io.

7、2-f=3*0.722=2.16518f=2.466*0,722=1.78KASJ=4.15*46.25=191.938MVASo.2f=3*46.25=138.75MVAS8f=2.466*46.25=114.05MVA总短路参数：（新站35KV母线&点）I”=4.138+2.995=7.133KA , So.2=265.252+138.75-404MVAIo.2=4.138+2.165=6.303KA, S=265.252+114.053=379.03MVAL=4.138+1.78=5.918KA, ich=2.551”=18.19KAS”=265.252+191.938=457.189M

8、VA Ich=l.521”=10.842KA2、求d2点（新站6KV母线）短路参数：简化等值电路图：X23-X16+X13=0.4305+0.5=0.9305求各支路转移电抗：X24=X1-d2*=0.9305/0.53=1.632X25=Xf-d2*=0.9305/0.47=2.1641.632 .252.164d2求各支路计算电抗：系统：X24=l.632电厂：X25=X25*Sef/SJ=2.164*46.25/100=1求电流标么值：系统：irw =10.2-1*= L劣1/1.632=0.613电厂：据X25=1,得：L*”=l, I0,2-f*w =0.89, Ioof*w =1.

9、16短路参数：系统：=Io.2-i=1=0.613*9.16=5.61 IKASi”= So.2-1 Sooi0.613*10061.3MVA电厂：If”=1*46.25/6*6.3=1*4.239=4.239KAIo.2-f=0.89*4.239=3.7721=1.16*4.239=4.917KASf=1*46.25=46.25MVASo.2f=0.89*46.25=41.163MVAS8f=1.16*46.25=53.65MVA总短路参数：（新站6KV母线dz点）I”=5.611+4.239=9.85KA , So,2=61.257+41.163=102.42MVAIo.2=5.611+3

10、.772=9.384KAS-=61.257+53.65=114.907MVAI=5.611+4.917=10.528KA ich=2.551”=25.117KAS”=61.257+46.25=107.507MVA Ich=l.521”=14.972KA3、求d3点（-450 I段母线）短路参数：新站至一450 I段电缆型号为MYJY22-3*150-2510m其阻抗标么值：X26=l.192, X27=X23+X26=0.9035+1.192=2.095求各支路转移电抗：X28=X1-d3*=2.095/0.53=3.676X29=Xf-d3*=2.095/0.47=4.8732.095d34

11、Q28293.6764.873d34求各支路计算电抗：系统:X28=3.676电厂：X29=4.873*46.25/100=2.254求电流标么值：系统：L*”=L）,2t*= I-i*=l/3.676=0.272发电机：据X29,=2.095,约:L*”=0.48, Io.2-f*w =0.45, Lf*=0.51短路参数：系统：1=10.2-1=1*0.272*9.16=2.492KASJ= So.2-1= S*0.272*100=27.2MVA电厂：L”=0.48*46.25/73*6.3=2.019KAIo.2-f=0.45*46.25/73*6.3=1.912KA18f=0.51*4

12、6.25/石*6.3-2.146KASJ=0.48*46.25=22.027MVASo.2f=0.45*46.25=20.859MVAS8f=051*46.25=23.414MVA总短路参数：（-450泵房I段母线）I”=2.492+2.019=4.51KA , So,2=27.2+20.859=48.059MVAIo.2=2.492+1.912=4.403KAS,=27.2+23.414=50.614MVAI-=2.492+2.146=4.637KA ich=2.551”=11.50IKAS”=27.2+22.027=49.227MVA Ich=l.521”=6.856KA4、求d4点（一4

13、50人行井车房变电所母线）短路参数：6450泵房至人行井车房高压电缆型号为ZRYJV22-3*70-360m.其阻抗标么值:X30=0.406, X31=X27+X30=2.095+0.406=2.502求各支路转移电抗：Xi-d4*=2.502/0.53=4.72=X32Xf-d4*=2.502/0.47=5.322=X33求各支路计算电抗：系统:系=4.72发电机:X33=5.322*46.25/100=2.462求电流标么值：系统：irw =io.2-r=1=0；=1/4.72=0.212发电机：据X33=2.462,得：I；”=0.411, Io.2-f*w =0.391,.431短路

14、参数：系统:L=1。2尸1-1=0.212*9.16=1.941KASi”= So,2-i= S-fO.212*100=21.2MVA电厂：If”=0.411*46.25/73*6.3=0.411*4.239=1.742KAIo.2.f=0.391*46.25/V3*6.3=1.657KA18f=0.431*46.25/73*6.3=1.827KASf”=0.411*46.25=19.009MVASo.2f=0.391*46.25=18.084MVAS8f=0.431*46.25=19.934MVA总短路参数：（-450人行井车房变电所）I”=1.941+1.742=3.928KA , S0,

15、2=21.2+18.084=39.271MVAIo.2=1.941+1.657=3.843KAS-=21.2+19.934=41.121MVAI=l.941+1.827=4.034KA ich=2.551”=9.39IKAS”=21.2+19.009=40.196MVA Ich=l.521”=5.598KA5、求d5点（-750三采变电所）短路参数:6-450泵房至-750三采高压电缆型号为:MYJV22-3*95-2900其阻抗标么值：X34=1.614, X35=X27+X34=2.095+1.614=3.71求各支路转移电抗：X36=3.71/0.53=7X：；7=3.71/0.47=7

16、.893求各支路计算电抗：系统：Xs6=7发电机:X37=7.893*46.25/100=3.65求电流标么值：系统：L*”=I0.2t*= Ki*=1/7.893=0.143发电机：据X：J =3.653,故按无限容量电源系统计算:L*”=Io.2-f*=l8f*”=1/3.65=0.274短路参数：系统:L”=Io,2-i=1-1=0.143*9.16=1.309KASJ = So.2-1= Soo1=0.143*100=14.3MVA发电机：IfM =Io.2-f=If=l.161Sf”=So.2f=S8f=12.673MVA总短路参数：（-750三采变电所）I”=Io,2=I-=2.4

17、7KA ,S”=So,2=S-=26.96 MVAich=2.551”=6.3KA,Ich=l.521”=3.755KA6、求d6点（一750泵房III段母线）短路参数：新站至-750III路电缆为：MYJV22-3*150-3606m.其阻抗标么值:X38=1.304,X39=X27+X38=0.9035+1.304=2.208求各支路转移电抗：X40=Xbd6*=2.208/0.53=4.165X41=Xf-d6*=2.208/0.47=4.697求各支路计算电抗：系统：X40=4.165发电机:X=4.697*46.25/100=2.172求电流标么值：系统：=Io.2-i*=1-；=1

18、/4.165=0.24发电机：据X=2.172得:I；”=0.457, I。？”=0.436,二；”=0.487短路参数：系统：L”=Io.2-i=1-1=0.24*9.16=2.2KASJ= So.2-1= S*0.24*100=24MVA发电机：L”=0.457*4.165=1.937 KA ,I0.2-f=0.436*4.165=1.848 KA ,18f=0.487*4.165=2.064KA ,S”=0.457*46.25=21.136MVASo.2f=0.436*46.25=20.165MVAS8f=0.487*46.25=22.524MVA总短路参数：（-750泵房in段母线）I

19、”=4.136 KA, Io,2=4.047 KA, I=4.263KA,S”=45.145 MVA, So,2=44.174 MVA, S-=46.533MVA, ich=2.551”=10.547KA, Ich=l.521”=6.287KA7、求d7点（-750钢缆机I路）短路参数：6-750泵房至-750钢缆机I路电缆为：ZRYJV-3*70-1200m其阻抗标么值：X42=0.817,贝!J： X3=X39+X42=2.208+0.817=3.025求各支路转移电抗：X44=X.d7*=3.025/0.53=5.707元5=乂7*=3.025/0.43=6.435求各支路计算电抗：系统

20、:X44=5.707发电机:3发.435*46.25/100=2.976求电流标么值：系统：L*”=Io.2T*= Ki*=l/5.707=0.175发电机:据X=2.976,故：I；”=0.334, I。？ f *=0.322,%*”=0.354短路参数：系统：L”=Io,2-i=1-1=0.175*9.16=1.605KASJ= So.* S,=0.175*100=17.5MVA发电机：L”=0.334*4.239=1.416KAIo.2-f=O.322*4.239=1.365KA18f=0.354*4.239=1.5KASf”=0.334*46.25=15.448MVA50. 2f=0.

21、322*46.25=14.893MVAS8f=0.354*46.25=16.373MVA总短路参数：（-750钢缆机房I段母线）I”=3.021 KA, Io,2=2.97 KA, I-=3.106KA ,So.2=32.971 MVA, S=32.416 MVA, S”=33.896MVA , ich=2.551”=7.703KA, Ich=l.521”=4.596KA8、求d8点（-750西翼H段母线）短路参数：-750泵房至-750 II西翼路电缆为：ZRYJV-3*70-984m 其阻抗标么值：X46=0.67,贝!J： X7=X39+X46=2.208+0.67=2.878求各支路转

22、移电抗：X48=Xbd8*=2.878/0.53=5.429X=Xf-d8*=2.878/0.47=6.122si求各支路计算电抗：系统：X48=5.429发电机:及=6.122*46.25/100=2.832求电流标么值：系统：L*”=Io.= K1*=l/5.429=0.184发电机：据Xm=2.832得：L*”=0.36, I0.2-f*w =0.34, Is；”=0.38短路参数：系统：L”=Io.2-i=81=0.184*9.16=1.687KASi” So.2-i Sooi0.184*10018.4MVA发电机：L ”=0.36*4.239=1.526KA, Io,2 fO.34*

23、4.239=1.44KA, Kf=0.38*4.239=1.61KA , SJ=0.36*46.25=16.65MVASo.2f=0.34*46.25=15.72MVA ,S8f=0.38*46.25=17.58MVA总短路参数：（-750西翼H段母线）I”=1.687+1.526=3.213KA , I（）,2=l.687+1.44=3.124KA,I=l.687+1.61=3.297KA, S”=18.4+16.65=35.049MVASo.2=18.4+15.72=34.124MVA S=18.4+17.58=35.974MVA, ich-2.551”=8.193KA, Ich=l.52

24、1”=4.884KA9、求d9点（-750钢缆机房II段母线）短路参数：-750西翼至-750钢缆机II路电缆为：ZRYJV-3*70-280m其阻抗标么值：X50=O.191, X5l=X47+X50=3.069求各支路转移电抗：X52=Xi-d9*=3.069/0.53=5.79X53=Xf-d9*=3.069/0.47=6.529求各支路计算电抗:系统：X52=5.79发电机：X53,=6.529*46.25/100=3.02求电流标么值：系统：L*”=1。=1旬*=1/5.79=0.17发电机：据X53=3.02得：3,故按无限容量电源系统计算：IJ”=1。f *=%*”=1/3.02

25、=0.33短路参数：系统：L”=Io.2-i= II=0.17*9.16=1.557KASJ= S0.2-尸 S,=0.17*100=17MVA发电机：If”=10.2产30.33*4.239=1.4KA ,S=S.2f=S8f=0.33*46.25=15.263MVA总短路参数：（-750钢缆机H段母线）I”= Io.2=二=1.557+1.4=2.957KA,S”= So,2= Ss=17+15.263=32.263MVA,ich=2.551”=7.538KA, Ich=l.521”=1.52*2.95=4.493KA10、求diO点（一450泵房n段母线）短路参数：新站至-450H路电缆

26、为：MYJV22-3*150-3156m其阻抗标么值:X.541.141, X55X23+X54-2.045求各支路转移电抗：X56=X1-dl0*=2.045/0.53=3.858X57=Xf-dl0*=2.045/0.47=4.35si552.045diO563.85857435diO求各支路计算电抗:系统:X56=3.858发电机:X57=4.35*46.25/100=2.012求电流标么值:系统：irw =10.2-1*=-3.858=0.259发电机:据X57=2.012得：L*”=0.497,=0.468, J*”=0.527短路参数:系统:Iiw =Io.2-i= Ioo1=0.

27、259*9.16=2.375KASi”= So.2-i= Sooi0.259*10025.9MVA发电机:If”=0.497*4.239=2.104KA , Io,2 f=O.468*4.239=1.984KA,Isf=0.527*4.239=2.234KA, S=0.497*46.25=22.986MVASo.2f=0.468*46.25=21.645MVA, S8f=0.527*46.25=24.374MVA总短路参数：（-450泵房H段母线）r =2.375+2.104=4.479KA , I0,2=2.375+1.984=4.359KA,Ioo=2.375+2.234=4.609KA,

28、 S”=25.9+22.986=48.886MVASo.2=25.9+21.645=47.545MVA, Ss=25.9+24.374=50.274MVA,Ich=l.521”=11.427KA , ich=2.551”=6.81IKA11、求dll点（一450泵房HI段母线）短路参数：新站至-450III路电缆为：MYJV22-3*150-2600m其阻抗标么值:X.580.94, X59X23+X,58-1.844求各支路转移电抗：X60=X1-dir=l.844/0.53=3.478X6i=Xf-dll*=l.844/0.47=3.922si1.8443.4783.922求各支路计算电抗

29、：系统：X60=3.478发电机：X6/=3.9机*46.25/100=1.841求电流标么值：系统：L*”=i,2t*=-3.478=0.287发电机:据心=1.814得：If*”=0.556, Io.2-f *”=0.517,二；”=0.595短路参数：系统：L”=Io.2-i= looO.287*9.16=2.633KASi”= So,2-1= Sf0.287*100=28.7MVA发电机：L”=0.556*4.239=2.357KA , Io.2-f=O.517*4.239=2.191KA, If=0.595*4.239=2.522KA , SJ=0.556*46.25-25.715M

30、VA So.2f=O.517*46.25=23.911MVA, S8f=0.595*46.25=27.519MVA 总短路参数：（-450泵房HI段母线）I”=2.633+2.375=5.008KA , Io,2=2.633+2.191=4.824KA, I=2.633+2.522=5.155KA, S”=28.7+25.715=54.415MVA So.2=28.7+23.911=52.611MVA, S-=28.7+27.519=56.219MVA, ich=2.551”=12.725KA , Ich=l.521”=7.585KA,12、-450二采配电所06年已撤除。13、求dl3点（-

31、450泵房W段母线）短路参数：新站至-4501V路电缆为：MYJV22-3*150-2480m 其阻抗标么值:Xee = O.922 Xe7=X23+X661.826求各支路转移电抗：X68=Xdi3*=L 826/0.53=3.444X69=Xf-dl3*=l.826/0.47=3.884Q683.444oA693.884工SIdl3求各支路计算电抗：系统：X68=3.444发电机:X69=3.844*46.25/100=1.796求电流标么值：系统：=Io.2-i*=1-；=1/3.444=0.29发电机：据及5=1.796得：1；”=0.561, I。？”=0.521,二；”=0.602

32、短路参数：系统：Iiw =Io.2-i=81=0.29*9.16=2.659KASi”= So.2-1= SooO.29*100=29MVA发电机：L”=0.561*4.239=2.378KA , I。2f=0.521*4.239=2.208KA,Lf=0.602*4,239=2.552KA , SJ=0.561*46.25=25.946MVASo.2f=0.521*46.25=24.096MVA, S8f=0.602*46.25=27.843MVA总短路参数：I”=2.659+2.378=5.037KA, S”=29+25.946=54.946MVA,Io.2=2.659+2.208=4.8

33、67KA, So,2=29+24.096=53.096MVA,56.843MVA ，I 8=2.659+2.552=5.211KA, S =29+27.843= ich=2.551”=12.845KA, Ich=l.521”=7.657KA14、求九点（一750压风机房）短路参数：-450泵房至一750压风机房电缆为：MYJV22-3*95-2300m其阻抗标么值：X70=l.198,X71=X67+X70=3.024求各支路转移电抗：X72=X1-dl4*=3.024/0.53=5.705X73=Xf-dl；=3.024/0.47=6.433si736.433dl4求各支路计算电抗：系统：X

34、72=5.705发电机：X73=6.433*46.25/100=2.975求电流标么值：系统：L*”=i,2t*=-5.705=0.175发电机：据X73=2.975得：L*”=0334, I。？”=0.323, J*”=0.354短路参数：系统：L”=10.2-1=1卬=0.175*9.16=1.606KASJ= S0.2-尸 SfO.175*100=17.5MVA发电机：L”=0.334*4.239=1.416KA, Io.2-f=O.323*4.239=1.369KA,0.354*4.239=1.5KA, S=0.334*46.25=15.449MVA,S0.2f=0.323*46.25

35、=14.939MVA , S8f=0.354*46.25=16.373MVA 总短路参数：（-750压风机房）I”=3.021, Io,2=2.975, I-=3.106KA,S”=32.977, So.2=32.468, S=33.106VA, ich=2.551”=7.705KA, Ich = l.521”=4.463KA15、求九点（一750泵房I段母线）短路参数：新站至-750 I路电缆为：MYJY22-3*150-3899m 其阻抗标么值：X74=1.41, X75=X23+X74=2.314求各支路转移电抗：X76=Xdi5*=2.314/0.53=4.365X77=X.di5*=

36、2.314/0.47=4.922SI774.922求各支路计算电抗：系统：X76=4.365发电机:X77=4.922*46.25/100=2.277求电流标么值：系统：irw =10.2-1*= I1*=l/4.365=0.229发电机：据X77=2.277得：1；”=0.438, Io.2-f*w =0.418, J*=0.465短路参数：系统：L”=Io.2-i= II=0.229*9.16=2.098KASJ= S0.2一尸 S-,=0.229*100=22.9MVA发电机：=0.438*4.239=1.857KA , I0.2-F0.418*4.239=1.772KA, If=0.4

37、65*4.239=1.971KA , SJ =0.438*46.25=20.258MVA So.2f=0.418*46.25=19.333MVA, S8f=0.465*46.25=21.506MVA 总短路参数：（-750泵房I段母线）r =2.098+1.857=3.955KA, S”=22.9+20.258=43.158MVA,Io.2=2.098+1.772=3.87KA, So,2=22.9+19.333=42.233MVA, L=2.098+1.971=4.069KA,Ss=22.9+21.506=44.406MVA,ich=2.551”=10.058KA, Ich=l.521”=6

38、.012KA16、求九点（一920泵房I段母线）短路参数:-750泵房至-920 I路电缆为：ZRYJV-3*95-1440m其阻抗标么值：X78=0.75,乂79=乂75+乂78=3.064求各支路转移电抗：X8o=X1-dl6*=3.064/0.53=5.78X81=Xf-dl6*=3.064/0.47=6.518求各支路计算电抗：系统：Xso=5.78发电机：MJ =6.518*46.25/100=3.015求电流标么值：系统:irw =10.2-1*= Ki*=l/5.78=0.173发电机：据X/=3.0153,故按无限大容量计算，得：1；”= Io2/” J*”=0.332短路参数

39、：系统：L”=Io.2-i= I-fO.173*9.16=1.585KASJ= So.* S,=0.173*100=17.3MVA发电机：L”=Io.2-f=I8f=0.332*4.239=1.407KA ,S=S0.2f= S8f=0.332*46.25=15.355MVA总短路参数：（-920泵房I段母线）I”=Io,2=I-=l.585+1.407=2.992KA,S”=S0.2=S8=17.3+15.355=32.655MVA,ich=2.551”=7.629KA, Ich=l.521”=4.548KA17、求dl7点（-750西翼配电所I段母线）短路参数:-750泵房至-750西翼I

40、路电缆为：ZRYJV-3*70-987m 其阻抗标么值:Xs2=0.672,及3=乂75+乂82=2.986求各支路转移电抗：兄4=37*=2.986/0.53=5.633,X85=Xf7*=2.986/0.47=6.3522.9865.6336.352求各支路计算电抗：系统：系=5.633发电机:X85=6.352*46.25/100=2.938求电流标么值：系统：L*”=Io.2T*=1；=1/5.633=0.178发电机:据选=2.938,得:=0.339, Io.2-f*w =0.326,*”=0.359短路参数：系统：L”=Io.2-i=（81=0.178*9.16=1.626KAS

41、J= So.2-1= Sf0.178*100=17.8MVA发电机：L”=0.339*4.239=1.437KA , I。2f=0.326*4.239=1.382KA ,Lf=0.359*4,239=1.522KA ,=0.339*4.239=15.679KA ,So.2f=0.326*4.239=15.078KA , S8f=0.359*46.25=16.604MVA 总短路参数：（-750西翼配电所I段母线）I”=3.063KA,%2=3.008KA, L=3.148KA,S”=33.431 MVA, So.2=32.83 MVA, S=o=34.356MVA,ich=2.551”=7.8

42、81KA, Ich=l.521”=4.656KA18、求点九（管子井风机房配电所n段母线）短路参数:一号井配电所至管子井风机房配电所II路电缆为：YJV22-3*95mm2-330m其阻抗标么值：X6-0.172 X87= X131+X86=1.023求各支路转移电抗：x88=x,-dl8*=l.023/0.53=1.929,X89=Xf-dl8*=l.023/0.47=2.176,si求各支路计算电抗：系统：系=1.929发电机:X89=2.176*46.25/100=1.006求电流标么值：系统:=10.2-1*=-1.929=0.518发电机:据4=1.006,得：短”=0.995,=0

43、.886, J*”=1.152短路参数：系统:L”=10.2-1= I=i=0.518*9.16=4.748KASi”= So,2-1= Sf0.518*100=51.8MVA发电机：L”=0.995*4.239=4.216KA , Io.2-f=O.886*4.239=3.755KA ,If=1.152*4.239=4.884KA , S=0.995*4.239=46KA , So.2f=O.886*4.239=40.968KA , S8f=1.152*46.25=53.289MVA 总短路参数：（管子井风机房配电所n段母线）I”=8.963KA, Io.2=8.502KA,18=9.63I

44、KA,S”=97.829 MVA, So.2=92.797 MVA, S=105.118MVA,ich=2.551”=22.856KA, Ich=l.521”=13.624KA19、求九点（一750泵房H段母线）短路参数：新站至-750II 路电缆为：MYJY22-3*150-3660m其阻抗标么值:Xgo=1.324, X91 X23+X90-2.228求各支路转移电抗：X92=Xi9*=2.228/0.53=4.203X93=Xf-di9*=2.228/0.47=4.7392.2284.2034.739求各支路计算电抗：系统:X92=4.203发电机：X93=4.739*46.25/100=2.192求电流标么值：系