“三相短路故障分析与计算的算法设计”
Y33 y3 y1 y2 Y34 Y43 Y36 Y63
1111 j14.324；2jX8jX6jX7jX4/2 K2
11
j5.43；Y Y j3.2362；35532
jX6jX4/2 K21
j3.3003；jX7
1jX2/2
1jX4/2
j10.8683；
Y41 0；Y42 0；Y43 j0.5270；Y44
Y45 0；Y46 0；Y51 0；Y52 j0；Y53 j3.2362；Y54 0；Y55 y2
11
j4.601；Y56 1.452；Y61 0；Y62 0；2jX6j(X3) K3
11 j6.354jX1jX3 K3
Y63 j3.3003；Y64 0；Y65 1.452；Y66
0000 j1.1j0.992 j0.992 j3.43j3.3557 000 0j3.356 j14.324j5.43j3.236j3.3 Y=
00j5.43 j10.86800 00j3.2360 j4.601j1.452
00j3.30j1.452 j6.354
3.5三相短路电流及短路功率
短路点的电抗标幺值为X* 1/Y11 j0.9091
"
IK短路点次暂态短路电流为 Y11 U1 1.1
短路点次暂态短路电流有名值为
"
I" IK
100 6.3
10.08
(kA)
"
i 2.55 I 2.55 10.08 25.705(kA) MK短路点冲击电流为
"S 3 U I 3 6.3 10.08 109.99(MV A) Kav短路点短路功率为
两种算法的次暂态短路电流比较误差为ΔI=10.08-9.22=0.86(kA)