XXXXXXXX毕业设计（论文）
US%SB141000???0.824
100SN100170?3Xd??SB1000?0.2055??0.411 SN511.17?1000?100?0.8?3?14
XT1=XT2 =XT3=XT4=
XG1=XG2 =XG3=XG4=XT5=XT6 =XT7=XT8=
US%SB100SN1）当d1点短路时（母线短路）
总
10
XXXXXXXX毕业设计（论文）
X总=(0.824+0.411)/4=0.309 2）当d2点短路时（发电机出口侧）
总
11
XXXXXXXX毕业设计（论文）
X总=（0.824+0.411）/3=0.412 ∑Y=
111111??????62.812 X系X总XT10.01690.4120.824X15?X系?XT1??Y?0.0169?0.824?62.812?0.875 X16?X总?XT1??Y?0.412?0.824?62.812?21.324
3）当d3点短路时（厂用低压侧）
12
XXXXXXXX毕业设计（论文）
总
X总=（0.824+0.411）/3=0.412 利用分步系数法和星三角变换法：
?111?X1?X系?XT1??X?X?X???X15?0.875
T1总??系?111?X2?X总?XT1????X16?21.324 ??X??系XT1X总?总
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XXXXXXXX毕业设计（论文）
11111111????????2.505 X1X2XT5XG10.87521.324140.411?Y?X3?X1?XT5??Y?0.875?14?2.505?30.686 X4?X2?XT5??Y?21.324?14?2.505?747.833 X5?XG1?XT5??Y?0.411?14?2.505?14.414
总
4.3 计算电抗求值 f-1点
XjsB?X总?SN511.1?0.309?4??0.632 SB1000SN1000?0.875??0.875 SB1000 f-2点 Xjs系?X15?XjsB?X16?SN511.1?21.324?3??32.696>3.45 SB1000XjsC?XG1?SN511.1?0.411??0.21 SB1000SN1000?30.686??30.686?3.45 SB1000 f-3点 Xjs系?X3? XjsB?X4?SN511.1?747.833?3??1146.652>3.45 SB100014