格目底东井春季预防性试验计算书.docx
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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/1.732Uc1=100MVA/1.732×37KV=1.56KA(计算37KV线路)
Id2=Sd/1.732Uc2=100MVA/1.732×10.5KV=5.499KA(计算10.5KV线路)
玉格线I、II回:
LGJ-24015km
(一)、D1点(35/10KV变电所35KV母线)
X1=xLSd/Uc12
=0.4×15×100/372=0.43828
XΣ(D1max)=Xmax+X1=0.25387+0.43828=0.69215
XΣ(D1min)=Xmin+X1=0.44210+0.43828=0.88038
ID1(3)max=Id1/XΣ(D1max)=1.56/0.69215=2.254KA
ID1(3)min=Id1/XΣ(D1min)=1.56/0.88038=1.772KA
ID1
(2)min=0.866ID1(3)min=0.866×1.96=1.534KA
SD1max=Sd/XΣ(D1max)=100/0.69215=144.48MVA
SD1min=Sd/XΣ(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=3—10KV时,x=0.35Ω/km;当UN=35—220KV时,x=0.4Ω/km)
L:
架空线路长度,km
XΣ(D1max):
D1点最大三相短路电抗标么值
XΣ(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
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=7.5×100MVA/(100×10000KVA)=0.752
XΣ(D2max)=Xsmax+X1+XT=0.25387+0.43828+0.752=1.44415
XΣ(D2min)=Xsmin+X1+XT=0.44210+0.43828+0.752=1.63238
ID2(3)max=Id2/XΣ(D2max)=5.499/1.44415=3.808KA
ID2(3)min=Id2/XΣ(D2min)=5.499/1.63238=3.369KA
ID2
(2)min=0.866ID2(3)min=0.866×3.369=2.918KA
SD2(3)=Sd/XΣ(D2max)=100MVA/1.44415=69.24MVA
SD2(3)=Sd/XΣ(D2min)=100MVA/1.63238=61.26MVA
注:
XΣ(D2max):
D2点最大三相短路电抗标幺值
XΣ(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=0.08×0.19×100/10.52=0.01379
X3=xLSd/Uc22=0.35×4.5×100/10.52=1.42857
X4=x0LSd/Uc22=0.08×0.5×100/10.52=0.03628
ID3(3)max=Id2/XΣ(D3max)=Id2/(XΣ(D2max)+X2+X3+X4)
=5.499/(1.44415+0.01379+1.42857+0.03628)
=5.499/2.92279=1.881KA
ID3(3)min=Id2/XΣ(D3min)=Id2/(XΣ(D2min)+X2+X3+X4)
=5.499/(1.63238+0.01379+1.42857+0.03628)
=5.499/3.11102=1.768KA
ID3
(2)min=0.866ID3(3)min=0.866×1.768=1.531KA
SD3(3)=Sd/XΣ(D3max)=100MVA/2.92279=34.214MVA
SD3(3)=Sd/XΣ(D3min)=100MVA/3.11102=32.144MVA
注:
x0:
电缆线路单位长度电抗值(当UN=3—10KV时,x0=0.08Ω/km)
x:
架空线路单位长度电抗值(当UN=3—10KV时,x=0.35Ω/km)
(四)、D4点(东井工业场地10KV变电所母线侧)
X5=x0LSd/Uc22=0.08×0.45×100/10.52=0.03265
ID4(3)max=Id2/XΣ(D4max)=Id2/(XΣ(D2max)+X5)
=5.499/(1.44415+0.03265)
=5.499/1.4768=3.69KA
ID4(3)min=Id2/XΣ(D4min)=Id2/(XΣ(D2min)+X5)
=5.499/(1.63238+0.03265)
=5.499/1.66503=3.303KA
ID4
(2)min=0.866ID4(3)min=0.866×3.303=2.86KA
SD4(3)=Sd/XΣ(D4max)=100MVA/1.4768=67.71MVA
SD4(3)=Sd/XΣ(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=0.08×1.6×100/10.52=0.1161
ID5(3)max=Id2/XΣ(D5max)=Id2/(XΣ(D2max)+X6)
=5.499/(1.44415+0.1161)
=5.499/1.56025=3.524KA
ID5(3)min=Id2/XΣ(D5min)=Id2/(XΣ(D2min)+X6)
=5.499/(1.63238+0.1161)
=5.499/1.74848=3.145KA
ID5
(2)min=0.866ID5(3)min=0.866×3.145=2.724KA
SD5(3)=Sd/XΣ(D5max)=100MVA/1.56025=64.09MVA
SD5(3)=Sd/XΣ(D5min)=100MVA/1.74848=57.19MVA
(六)、D6点(二采风井10KV变电所母线侧)
X7=x0LSd/Uc22=0.08×0.11×100/10.52=0.00798
X8=xLSd/Uc22=0.35×3.5×100/10.52=1.11111
X9=x0LSd/Uc22=0.08×0.4×100/10.52=0.02902
ID6(3)max=Id2/XΣ(D6max)=Id2/(XΣ(D2max)+X7+X8+X9)
=5.499/(1.44415+0.00798+1.11111+0.02902)
=5.499/2.59226=2.121KA
ID6(3)min=Id2/XΣ(D6min)=Id2/(XΣ(D2min)+X7+X8+X9)
=5.499/(1.63238+0.00798+1.11111+0.02902)
=5.499/2.78049=1.978KA
ID6
(2)min=0.866ID6(3)min=0.866×1.978=1.713KA
SD6(3)=Sd/XΣ(D6max)=100MVA/2.59226=38.58MVA
SD6(3)=Sd/XΣ(D6min)=100MVA/2.78049=35.965MVA
(七)、D7点(所内变压器1#、2#)
X10=x0LSd/Uc22=0.08×0.03×100/10.52=0.00218
X11=Uk%Sd/100Sn=4.53×100MVA/(100×630KVA)=7.19048
ID7(3)max=Id2/XΣ(D7max)=Id2/(XΣ(D2max)+X10+X11)
=5.499/(1.44415+0.00218+7.19048)
=5.499/8.63681=0.637KA
ID7(3)min=Id2/XΣ(D7min)=Id2/(XΣ(D2min)+X10+X11)
=5.499/(1.63238+0.00218+7.19048)
=5.499/8.82504=0.623KA
ID7
(2)min=0.866ID7(3)min=0.866×0.623=0.54KA
SD7(3)=Sd/XΣ(D7max)=100MVA/8.63681=11.578MVA
SD7(3)=Sd/XΣ(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=3.808KA
ID8(3)min=3.369KA
ID8
(2)min=2.918KA
SD8(3)=69.24MVA
SD8(3)=61.26MVA
(九)、D9点(老地沟I回)
X12=x0LSd/Uc22=0.08×0.39×100/10.52=0.0283
X13=xLSd/Uc22=0.35×0.8×100/10.52=0.254
X14=x0LSd/Uc22=0.08×0.03×100/10.52=0.00218
ID9(3)max=Id2/XΣ(D9max)=Id2/(XΣ(D2max)+X12+X13+X14)
=5.499/(1.44415+0.0283+0.254+0.00218)
=5.499/1.72863=3.18KA
ID9(3)min=Id2/XΣ(D9min)=Id2/(XΣ(D2min)+X12+X13+X14)
=5.499/(1.63238+0.0283+0.254+0.00218)
=5.499/1.91686=2.869KA
ID9
(2)min=0.866ID9(3)min=0.866×2.869=2.485KA
SD9(3)=Sd/XΣ(D9max)=100MVA/1.72863=57.85MVA
SD9(3)=Sd/XΣ(D9min)=100MVA/1.91686=52.169MVA
(十)、D10点(老地沟II回)
X15=x0LSd/Uc22=0.08×0.12×100/10.52=0.00871
X16=xLSd/Uc22=0.35×1.2×100/10.52=0.38095
X17=x0LSd/Uc22=0.08×0.03×100/10.52=0.00218
ID10(3)max=Id2/XΣ(D10max)=Id2/(XΣ(D2max)+X15+X16+X17)
=5.499/(1.44415+0.00871+0.38095+0.00218)
=5.499/1.83599=2.995KA
ID10(3)min=Id2/XΣ(D10min)=Id2/(XΣ(D2min)+X15+X16+X17)
=5.499/(1.63238+0.00871+0.38095+0.00218)
=5.499/2.02422=2.717KA
ID10
(2)min=0.866ID10(3)min=0.866×2.717=2.353KA
SD10(3)=Sd/XΣ(D10max)=100MVA/1.83599=54.47MVA
SD10(3)=Sd/XΣ(D10min)=100MVA/2.02422=49.402MVA
(十一)、D11点(1#转载站I、II回)
X18=x0LSd/Uc22=0.08×0.5×100/10.52=0.03628
ID11(3)max=Id2/XΣ(D11max)=Id2/(XΣ(D2max)+X18)
=5.499/(1.44415+0.03628)
=5.499/1.48043=3.714KA
ID11(3)min=Id2/XΣ(D11min)=Id2/(XΣ(D2min)+X18)
=5.499/(1.63238+0.03628)
=5.499/1.66866=3.295KA
ID11
(2)min=0.866ID11(3)min=0.866×3.295=2.85KA
SD11(3)=Sd/XΣ(D11max)=100MVA/1.48043=67.55MVA
SD11(3)=Sd/XΣ(D11min)=100MVA/1.66866=59.93MVA
(十二)、D12点(10KV米箩线)
X19=x0LSd/Uc22=0.35×20×100/10.52=6.349
ID12(3)max=Id2/XΣ(D12max)=Id2/(XΣ(D2max)+X19)
=5.499/(1.44415+6.349)
=5.499/7.79315=0.706KA
ID12(3)min=Id2/XΣ(D12min)=Id2/(XΣ(D2min)+X19)
=5.499/(1.63238+6.349)
=5.499/7.98138=0.689KA
ID12
(2)min=0.866ID12(3)min=0.866×0.689=0.597KA
SD12(3)=Sd/XΣ(D12max)=100MVA/7.79315=12.83MVA
SD12(3)=Sd/XΣ(D12min)=100MVA/7.98138=12.53MVA
(十三)、D13点(机修车间检修电源)
X20=x0LSd/Uc22=0.08×0.2×100/10.52=0.01451
X21=Uk%Sd/100Sn=4×100MVA/(100×800KVA)=5
ID13(3)max=Id2/XΣ(D13max)=Id2/(XΣ(D2max)+X20+X21)
=5.499/(1.44415+0.01451+5)
=5.499/6.45866=0.851KA
ID13(3)min=Id2/XΣ(D13min)=Id2/(XΣ(D2min)+X20+X21)
=5.499/(1.63238+0.01451+5)
=5.499/6.64689=0.827KA
ID13
(2)min=0.866ID13(3)min=0.866×0.827=0.716KA
SD13(3)=Sd/XΣ(D13max)=100MVA/6.45866=15.48MVA
SD13(3)=Sd/XΣ(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=0.08×0.09×100/10.52=0.00653
ID14(3)max=Id2/XΣ(D14max)=Id2/(XΣ(D2max)+X22)
=5.499/(1.4768+0.00653)
=5.499/1.48333=3.707KA
ID14(3)min=Id2/XΣ(D14min)=Id2/(XΣ(D4min)+X22)
=5.499/(1.66503+0.00653)
=5.499/1.67156=3.29KA
ID14
(2)min=0.866ID14(3)min=0.866×3.29=2.85KA
SD14(3)=Sd/XΣ(D14max)=100MVA/1.48333=67.42MVA
SD14(3)=Sd/XΣ(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=0.08×0.03×100/10.52=0.00218
X24=Uk%Sd/100Sn=4.6×100MVA/(100×800KVA)=5.75
ID15(3)max=Id2/XΣ(D15max)=Id2/(XΣ(D4max)+X23+X24)
=5.499/(1.4768+0.00218+5.75)
=5.499/7.22898=0.761KA
ID15(3)min=Id2/XΣ(D15min)=Id2/(XΣ(D4min)+X23+X24)
=5.499/(1.66503+0.00218+5.75)
=5.499/7.41721=0.741KA
ID15
(2)min=0.866ID15(3)min=0.866×0.741=0.642KA
SD15(3)=Sd/XΣ(D15max)=100MVA/7.22898=13.83MVA
SD15(3)=Sd/XΣ(D15min)=100MVA/7.41721=13.48MVA
(十六)、D16点(一采区瓦斯泵1#、2#变压器二次侧)
X25=x0LSd/Uc22=0.08×0.4×100/10.52=0.02902
X26=Uk%Sd/100Sn=4×100MVA/(100×800KVA)=5
ID16(3)max=Id2/XΣ(D16max)=Id2/(XΣ(D4max)+X25+X26)
=5.499/(1.4768+0.02902+5)
=5.499/6.50582=0.845KA
ID16(3)min=Id2/XΣ(D16min)=Id2/(XΣ(D4min)+X25+X26)
=5.499/(1.66503+0.02902+5)
=5.499/6.69405=0.821KA
ID16
(2)min=0.866ID16(3)min=0.866×0.821=0.711KA
SD16(3)=Sd/XΣ(D16max)=100MVA/6.50582=15.37MVA
SD16(3)=Sd/XΣ(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=0.08×0.2×100/10.52=0.01451
X28=Uk%Sd/100Sn=4.2×100MVA/(100×1250KVA)=3.36
ID17(3)max=Id2/XΣ(D17max)=Id2/(XΣ(D4max)+X27+X28)
=5.499/(1.4768+0.01451+3.36)
=5.499/4.85131=1.134KA
ID17(3)min=Id2/XΣ(D17min)=Id2/(XΣ(D4min)+X27+X28)
=5.499/(1.66503+0.01451+3.36)
=5.499/5.03954=1.091KA
ID17
(2)min=0.866ID17(3)min=0.866×1.091=0.94KA
SD17(3)=Sd/XΣ(D17max)=100MVA/4.85131=20.61MVA
SD17(3)=Sd/XΣ(D17min)=100MVA/5.03954=19.84MVA
(十八)、D18点(二采区1#、2#主扇电机侧)
X29=x0LSd/Uc22=0.08×0.15×100/10.52=0.00218
ID18(3)max=Id2/XΣ(D18max)=Id2/(XΣ(D6max)+X29)
=5.499/(2.59226+0.00218)
=5.499/2.59444=2.12KA
ID18(3)min=Id2/XΣ(D18min)=Id2/(XΣ(D6min)+X29)
=5.499/(2.78049+0.00218)
=5.499/2.78267=1.976KA
ID18
(2)min=0.866ID18(3)min=0.866×1.976=1.713KA
SD18(3)=Sd/XΣ(D18max)=100MVA/2.59444=38.54MVA
SD18(3)=Sd/XΣ(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=0.08×0.06×100/10.52=0.00435
X31=Uk%Sd/100Sn=4×100MVA/(100×800KVA)=5
ID19(3)max=Id2/XΣ(D19max)=Id2/(XΣ(D6max)+X30+X31)
=5.499/(2.59226+0.00435+5)
=5.499/7.59661=0.724KA
ID19(3)min=Id2/XΣ(D19min)=Id2/(XΣ(D6min)+X30+X31)
=5.499/(2.78049+0.00435+5)
=5.499/7.78484=0.706KA
ID19
(2)min=0.866ID19(3)min=0.866×0.706=0.611KA
SD19(3)=Sd/XΣ(D19max)=100MVA/7.59661=13.16MVA
SD19(3)=Sd/XΣ(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=0.08×0.03×100/10.52=0.00218
X33=Uk%Sd/100Sn=4.6×100MVA/(100×800KVA)=5.75
ID20(3)max=Id2/XΣ(D20max)=Id2/(XΣ(D6max)+X32+X33)
=5.499/(2.59226+0.00218+5.75)
=5.499/8.34444=0.659KA
ID20(3)min=Id2/XΣ(D20min)=Id2/(XΣ(D6min)+X32+X33)
=5.499/(2.78049+0.00218+5.75)
=5.499/8.53267=0.644KA
ID20
(2)min=0.866ID20(3)min=0.866×0.644=0.558KA
SD20(3)=Sd/XΣ(D20max)=100MVA/8.34444=11.98MVA
SD20(3)=Sd/XΣ(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=2.121KA
ID21(3)min=1.978KA
ID21
(2)min=1.713KA
SD21(3)=38.58MVA
SD21(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=0.08×0.6×100