格目底东井春季预防性试验计算书.docx

1、格目底东井春季预防性试验计算书格目底东井2011年春季预防性试验定值计算书 2010年12月3日 短路电流及短路容量计算一、 根据上级电力部门提供的系统参数：玉舍110KV变电所35KV侧母线电抗标么值：最大方式Xmax：0.25387最小方式Xmin：0.44210二、 各短路点参数计算：本计算采用标么值法，选取基准参数如下：基准容量：Sd=100MVA基准电压：Uc1 =37KV； Uc2=10.5KV基准电流：Id1=Sd/1.732 Uc1=100MVA/1.73237KV=1.56KA（计算37KV线路）Id2=Sd/1.732 Uc2=100MVA/1.73210.5KV=5.49

2、9KA（计算10.5KV线路）玉格线I、II回：LGJ-240 15km（一）、D1点(35/10KV变电所35KV母线)X1=xLSd/Uc12 =0.415100/372=0.43828X(D1max)=Xmax+X1=0.25387+0.43828=0.69215X(D1min)=Xmin+X1=0.44210+0.43828=0.88038ID1(3)max=Id1/X(D1max)=1.56/0.69215=2.254KAID1(3)min=Id1/X(D1min)=1.56/0.88038=1.772KAID1(2)min= 0.866ID1(3)min=0.8661.96=1.5

3、34KASD1max=Sd/X(D1max)=100/0.69215=144.48MVASD1min=Sd/X(D1min)=100/0.88038=113.59MVA注：X1：玉格II回架空线路电抗标么值X2：玉格I 回架空线路电抗标么值x：架空线路单位长度电抗值(当UN=310KV时，x=0.35/km；当UN=35220KV时，x=0.4/km)L：架空线路长度，kmX(D1max)：D1点最大三相短路电抗标么值X(D1min)：D1点最小三相短路电抗标么值ID1(3)max：D1点最大三相短路电流值ID1(3)min：D1点最小三相短路电流值ID1(2)min：D1点最小两相短路电流值

4、SD1max：D1点的最大三相短路容量SD1min：D1点的最小三相短路容量（二）、D2点(35/10KV变电所10KV母线)主变压器：SFZ10-10000/35；短路阻抗：UK%=7.52变压器电抗标么值：XT=Uk%Sd/100Sn=7.5100MVA/(10010000KVA)=0.752X(D2max)=Xsmax+X1+XT=0.25387+0.43828+0.752=1.44415X(D2min)=Xsmin+X1+XT=0.44210+0.43828+0.752=1.63238ID2(3)max=Id2/X(D2max)= 5.499/1.44415=3.808KAID2(3)

5、min=Id2/X(D2min)= 5.499/1.63238=3.369KAID2(2)min= 0.866ID2(3)min=0.8663.369=2.918KASD2(3)=Sd/X(D2max)=100MVA/1.44415=69.24MVASD2(3)=Sd/X(D2min)=100MVA/1.63238=61.26 MVA注：X(D2max)：D2点最大三相短路电抗标幺值X(D2min)：D2点最小三相短路电抗标幺值ID2(3)max：D2点最大三相短路电流值ID2(3)min：D2点最小三相短路电流值ID2(2)min：D2点最小两相短路电流值SD2max：D2点的最大三相短路容

6、量SD2min：D2点的最小三相短路容量（三）、D3点（中井10KV变电所母线侧）X2= x0LSd/Uc22=0.080.19100/10.52=0.01379X3= xLSd/Uc22=0.354.5100/10.52=1.42857X4= x0LSd/Uc22=0.080.5100/10.52=0.03628ID3(3)max=Id2/X(D3max)= Id2/( X(D2max)+X2+X3+X4)= 5.499/(1.44415+0.01379+1.42857+0.03628)=5.499/2.92279=1.881KAID3(3)min=Id2/X(D3min)= Id2/( X

7、(D2min)+X2+X3+X4)=5.499/(1.63238+0.01379+1.42857+0.03628)=5.499/3.11102=1.768KAID3(2)min= 0.866ID3(3)min=0.8661.768=1.531KASD3(3)=Sd/X(D3max)=100MVA/2.92279=34.214MVASD3(3)=Sd/X(D3min)=100MVA/3.11102=32.144MVA注：x0：电缆线路单位长度电抗值(当UN=310KV时，x0=0.08/km)x：架空线路单位长度电抗值(当UN=310KV时，x=0.35/km)（四）、D4点（东井工业场地10K

8、V变电所母线侧）X5= x0LSd/Uc22=0.080.45100/10.52=0.03265ID4(3)max=Id2/X(D4max)= Id2/( X(D2max)+X5)=5.499/(1.44415+0.03265)=5.499/1.4768=3.69KAID4(3)min=Id2/X(D4min)= Id2/( X(D2min)+X5)=5.499/(1.63238+0.03265)=5.499/1.66503=3.303KAID4(2)min= 0.866ID4(3)min=0.8663.303=2.86KASD4(3)=Sd/X(D4max)=100MVA/1.4768=67

9、.71MVASD4(3)=Sd/X(D4min)=100MVA/1.66503=60.059MVA（五）、D5点（下井I、II回，井下变电所电源侧）X6= x0LSd/Uc22=0.081.6100/10.52=0.1161ID5(3)max=Id2/X(D5max)= Id2/( X(D2max)+X6)=5.499/(1.44415+0.1161)=5.499/1.56025=3.524KAID5(3)min=Id2/X(D5min)= Id2/( X(D2min)+X6)=5.499/(1.63238+0.1161)=5.499/1.74848=3.145KAID5(2)min= 0.8

10、66ID5(3)min=0.8663.145=2.724KASD5(3)=Sd/X(D5max)=100MVA/1.56025=64.09MVASD5(3)=Sd/X(D5min)=100MVA/1.74848=57.19MVA（六）、D6点（二采风井10KV变电所母线侧）X7= x0LSd/Uc22=0.080.11100/10.52=0.00798X8= xLSd/Uc22=0.353.5100/10.52=1.11111X9= x0LSd/Uc22=0.080.4100/10.52=0.02902ID6(3)max=Id2/X(D6max)= Id2/( X(D2max)+X7+X8+X

11、9)= 5.499/(1.44415+0.00798+1.11111+0.02902)=5.499/2.59226=2.121KAID6(3)min=Id2/X(D6min)= Id2/( X(D2min)+ X7+X8+X9)=5.499/(1.63238+0.00798+1.11111+0.02902)=5.499/2.78049=1.978KAID6(2)min= 0.866ID6(3)min=0.8661.978=1.713KASD6(3)=Sd/X(D6max)=100MVA/2.59226=38.58MVASD6(3)=Sd/X(D6min)=100MVA/2.78049=35.9

12、65MVA（七）、D7点（所内变压器1#、2#）X10= x0LSd/Uc22=0.080.03100/10.52=0.00218X11= Uk%Sd/100Sn=4.53100MVA/(100630KVA)=7.19048ID7(3)max=Id2/X(D7max)= Id2/( X(D2max)+X10+X11)=5.499/(1.44415+0.00218+7.19048)=5.499/8.63681=0.637KAID7(3)min=Id2/X(D7min)= Id2/( X(D2min)+ X10+X11)=5.499/(1.63238+0.00218+7.19048)=5.499/

13、8.82504=0.623KAID7(2)min= 0.866ID7(3)min=0.8660.623=0.54KASD7(3)=Sd/X(D7max)=100MVA/8.63681=11.578MVASD7(3)=Sd/X(D7min)=100MVA/8.82504=11.33MVA（八）、D8点（35/10KV变电所一、二段电容器）由于电缆很短，短路电流按D2点（10KV母线）计算ID8(3)max=3.808KAID8(3)min=3.369KAID8(2)min=2.918KASD8(3)=69.24MVASD8(3)=61.26MVA（九）、D9点（老地沟I回）X12= x0LSd/

14、Uc22=0.080.39100/10.52=0.0283X13= xLSd/Uc22=0.350.8100/10.52=0.254X14= x0LSd/Uc22=0.080.03100/10.52=0.00218ID9(3)max=Id2/X(D9max)= Id2/( X(D2max)+X12+X13+X14)=5.499/(1.44415+0.0283+0.254+0.00218)=5.499/1.72863=3.18KAID9(3)min=Id2/X(D9min)= Id2/( X(D2min)+ X12+X13+X14)=5.499/(1.63238+0.0283+0.254+0.0

15、0218)=5.499/1.91686=2.869KAID9(2)min= 0.866ID9(3)min=0.8662.869=2.485KASD9(3)=Sd/X(D9max)=100MVA/1.72863=57.85MVASD9(3)=Sd/X(D9min)=100MVA/1.91686=52.169MVA（十）、D10点（老地沟II回）X15= x0LSd/Uc22=0.080.12100/10.52=0.00871X16= xLSd/Uc22=0.351.2100/10.52=0.38095X17= x0LSd/Uc22=0.080.03100/10.52=0.00218ID10(3)

16、max=Id2/X(D10max)= Id2/( X(D2max)+X15+X16+X17)=5.499/(1.44415+0.00871+0.38095+0.00218)=5.499/1.83599=2.995KAID10(3)min=Id2/X(D10min)= Id2/( X(D2min)+ X15+X16+X17)=5.499/(1.63238+0.00871+0.38095+0.00218)=5.499/2.02422=2.717KAID10(2)min= 0.866ID10(3)min=0.8662.717=2.353KASD10(3)=Sd/X(D10max)=100MVA/1.

17、83599=54.47MVASD10(3)=Sd/X(D10min)=100MVA/2.02422=49.402MVA（十一）、D11点（1#转载站I、II回）X18= x0LSd/Uc22=0.080.5100/10.52=0.03628ID11(3)max=Id2/X(D11max)= Id2/( X(D2max)+ X18)=5.499/(1.44415+0.03628)=5.499/1.48043=3.714KAID11(3)min=Id2/X(D11min)= Id2/( X(D2min)+ X18)=5.499/(1.63238+0.03628)=5.499/1.66866=3.2

18、95KAID11(2)min= 0.866ID11(3)min=0.8663.295=2.85KASD11(3)=Sd/X(D11max)=100MVA/1.48043=67.55MVASD11(3)=Sd/X(D11min)=100MVA/1.66866=59.93MVA（十二）、D12点（10KV米箩线）X19= x0LSd/Uc22=0.3520100/10.52=6.349ID12(3)max=Id2/X(D12max)= Id2/( X(D2max)+ X19)=5.499/(1.44415+6.349)=5.499/7.79315=0.706KAID12(3)min=Id2/X(D

19、12min)= Id2/( X(D2min)+ X19)=5.499/(1.63238+6.349)=5.499/7.98138=0.689KAID12(2)min= 0.866ID12(3)min=0.8660.689=0.597KASD12(3)=Sd/X(D12max)=100MVA/7.79315=12.83MVASD12(3)=Sd/X(D12min)=100MVA/7.98138=12.53MVA（十三）、D13点（机修车间检修电源）X20= x0LSd/Uc22=0.080.2100/10.52=0.01451X21= Uk%Sd/100Sn=4100MVA/(100800KVA

20、)=5ID13(3)max=Id2/X(D13max)= Id2/(X(D2max)+ X20 +X21)=5.499/(1.44415+0.01451+5)=5.499/6.45866=0.851KAID13(3)min=Id2/X(D13min)= Id2/( X(D2min)+ X20 +X21)=5.499/(1.63238+0.01451+5)=5.499/6.64689=0.827KAID13(2)min= 0.866ID13(3)min=0.8660.827=0.716KASD13(3)=Sd/X(D13max)=100MVA/6.45866=15.48MVASD13(3)=Sd

21、/X(D13min)=100MVA/6.64689=15.04MVA（十四）、D14点（东井工业场地10KV变电所1#、2#主扇电机侧）X22= x0LSd/Uc22=0.080.09100/10.52=0.00653ID14(3)max=Id2/X(D14max)= Id2/(X(D2max)+ X22)=5.499/(1.4768+0.00653)=5.499/1.48333=3.707KAID14(3)min=Id2/X(D14min)= Id2/( X(D4min)+ X22)=5.499/(1.66503+0.00653)=5.499/1.67156=3.29KAID14(2)min

22、= 0.866ID14(3)min=0.8663.29=2.85KASD14(3)=Sd/X(D14max)=100MVA/1.48333=67.42MVASD14(3)=Sd/X(D14min)=100MVA/1.67156=59.82MVA（十五）、D15点（东井工业场地10KV变电所1#、2#所内变压器侧）X23= x0LSd/Uc22=0.080.03100/10.52=0.00218X24= Uk%Sd/100Sn=4.6100MVA/(100800KVA)=5.75ID15(3)max=Id2/X(D15max)= Id2/( X(D4max)+ X23 +X24)=5.499/(

23、1.4768+0.00218+5.75)=5.499/7.22898=0.761KAID15(3)min=Id2/X(D15min)= Id2/( X(D4min)+ X23 +X24)=5.499/(1.66503+0.00218+5.75)=5.499/7.41721=0.741KAID15(2)min= 0.866ID15(3)min=0.8660.741=0.642KASD15(3)=Sd/X(D15max)=100MVA/7.22898=13.83MVASD15(3)=Sd/X(D15min)=100MVA/7.41721=13.48MVA（十六）、D16点（一采区瓦斯泵1#、2#变

24、压器二次侧）X25= x0LSd/Uc22=0.080.4100/10.52=0.02902X26= Uk%Sd/100Sn=4100MVA/(100800KVA)=5ID16(3)max=Id2/X(D16max)= Id2/( X(D4max)+X25+X26)=5.499/(1.4768+0.02902+5)=5.499/6.50582=0.845KAID16(3)min=Id2/X(D16min)= Id2/( X(D4min)+ X25+X26)=5.499/(1.66503+0.02902+5)=5.499/6.69405=0.821KAID16(2)min= 0.866ID16(

25、3)min=0.8660.821=0.711KASD16(3)=Sd/X(D16max)=100MVA/6.50582=15.37MVASD16(3)=Sd/X(D16min)=100MVA/6.69405=14.94MVA（十七）、D17点（一采区压风机变压器二次侧）X27= x0LSd/Uc22=0.080.2100/10.52=0.01451X28= Uk%Sd/100Sn=4.2100MVA/(1001250KVA)=3.36ID17(3)max=Id2/X(D17max)= Id2/( X(D4max)+X27+X28)=5.499/(1.4768+0.01451+3.36)=5.4

26、99/4.85131=1.134KAID17(3)min=Id2/X(D17min)= Id2/( X(D4min)+ X27+X28)=5.499/(1.66503+0.01451+3.36)=5.499/5.03954=1.091KAID17(2)min= 0.866ID17(3)min=0.8661.091=0.94KASD17(3)=Sd/X(D17max)=100MVA/4.85131=20.61MVASD17(3)=Sd/X(D17min)=100MVA/5.03954=19.84MVA（十八）、D18点（二采区1#、2#主扇电机侧）X29= x0LSd/Uc22=0.080.15

27、100/10.52=0.00218ID18(3)max=Id2/X(D18max)= Id2/(X(D6max)+X29)=5.499/(2.59226+0.00218)=5.499/2.59444=2.12KAID18(3)min=Id2/X(D18min)= Id2/( X(D6min)+X29)=5.499/(2.78049+0.00218)=5.499/2.78267=1.976KAID18(2)min= 0.866ID18(3)min=0.8661.976=1.713KASD18(3)=Sd/X(D18max)=100MVA/2.59444=38.54MVASD18(3)=Sd/X(

28、D18min)=100MVA/2.78267=35.94MVA（十九）、D19点（二采区瓦斯泵I、II变压器二次侧）X30= x0LSd/Uc22=0.080.06100/10.52=0.00435X31= Uk%Sd/100Sn=4100MVA/(100800KVA)=5ID19(3)max=Id2/X(D19max)= Id2/( X(D6max)+ X30+X31)=5.499/(2.59226+0.00435+5)=5.499/7.59661=0.724KAID19(3)min=Id2/X(D19min)= Id2/( X(D6min)+X30+X31)=5.499/(2.78049+

29、0.00435+5)=5.499/7.78484=0.706KAID19(2)min= 0.866ID19(3)min=0.8660.706=0.611KASD19(3)=Sd/X(D19max)=100MVA/7.59661=13.16MVASD19(3)=Sd/X(D19min)=100MVA/7.78484=12.85MVA（二十）、D20点（二采区10KV变电所1#、2#所内变压器）X32= x0LSd/Uc22=0.080.03100/10.52=0.00218X33= Uk%Sd/100Sn=4.6100MVA/(100800KVA)=5.75ID20(3)max=Id2/X(D2

30、0max)= Id2/( X(D6max)+ X32 +X33)=5.499/(2.59226+0.00218+5.75)=5.499/8.34444=0.659KAID20(3)min=Id2/X(D20min)= Id2/( X(D6min)+ X32 +X33)=5.499/(2.78049+0.00218+5.75)=5.499/8.53267=0.644KAID20(2)min= 0.866ID20(3)min=0.8660.644=0.558KASD20(3)=Sd/X(D20max)=100MVA/8.34444=11.98MVASD20(3)=Sd/X(D20min)=100MVA/8.53267=11.72MVA（二十一）、D21点（二采区风井变电所一、二段电容器）由于电缆很短，短路电流按D6点（10KV母线）计算ID21(3)max= 2.121KAID21(3)min= 1.978KAID21(2)min= 1.713KASD21(3)= 38.58MVASD21(3)= 35.965MVA（二十二）、D22点（备用1#为轨道井临时配电点出线）X34= x0LSd/Uc22=0.080.6100