1. 27
8.3 Single Line Contingency on the Modified IEEE-30 Bus
Table 1: Data analysis of single line contingency for the Modified IEEE-30 Bus System
Serial
Number
Line Removed
(Single Contingency)
Voltage p.u. L-index Critical Bus Contingency
Rankings
Initial Optimum Initial Optimum Before After Before After
1. 1-2 0.8551 0.9685 0.2116 0.1543 30 30 25 27
2. 1-7 0.8547 0.9330 0.2122 0.1690 30 30 24 11
3. 2-8 0.8548 0.9682 0.2124 0.1549 30 30 23 25
4. 2-3 0.8475 0.9613 0.2149 0.1563 30 30 17 21
5. 2-9 0.8544 0.9679 0.2130 0.1554 30 30 21 24
6. 7-8 0.8547 0.9681 0.2122 0.1548 30 30 24 26
7. 8-9 0.8529 0.9668 0.2137 0.1557 30 30 19 23
8. 3-10 0.8538 0.9672 0.2154 0.1573 30 30 16 19
9. 9-4 0.8299 0.9146 0.2322 0.1783 30 30 09 09
10. 9-10 0.8575 0.9705 0.2085 0.1521 30 30 29 30
11. 9-11 0.8016 0.9256 0.3078 0.2202 30 30 04 04
12. 4-11 0.8547 0.9677 0.2134 0.1562 30 30 20 22
13. 12-13 0.7401 0.8815 0.4130 0.2764 16 16 01 01
14. 13-14 0.8592 0.9500 0.2341 0.1807 14 14 08 08
15. 13-15 0.8564 0.9697 0.2101 0.1532 30 30 27 28
16. 13-16 0.8489 0.9646 0.2221 0.1610 30 30 12 14
17. 13-17 0.8533 0.9674 0.2147 0.1563 30 30 18 21
18. 18-19 0.8535 0.9676 0.2149 0.1565 30 30 17 20
19. 18-20 0.8420 0.9473 0.2341 0.1738 30 22 08 10
20. 18-21 0.8504 0.9658 0.2198 0.1594 30 30 14 16
21. 19-20 0.8545 0.9683 0.2126 0.1548 30 30 22 26
22. 20-22 0.8648 0.9533 0.2370 0.1816 22 22 07 07
23. 20-23 0.8433 0.9490 0.2298 0.1662 30 23 10 13
24. 21-15 0.8520 0.9672 0.2170 0.1573 30 30 15 19
25. 22-24 0.8546 0.9672 0.2126 0.1585 30 24 22 18
26. 24-14 0.8557 0.9460 0.2112 0.1678 30 24 26 12
27. 16-17 0.8564 0.9699 0.2094 0.1526 30 30 28 29
28. 17-25 0.8471 0.9677 0.2239 0.1601 30 30 11 15
29. 23-25 0.8483 0.9663 0.2213 0.1590 30 30 13 17
30. 25-26 0.8780 0.9555 0.1891 0.1464 25 25 30 31
31. 26-28 0.8266 0.9322 0.2685 0.1960 27 27 05 05
32. 28-29 0.7822 0.9174 0.3365 0.2306 29 29 03 03
33. 28-30 0.7568 0.9085 0.3842 0.2524 30 30 02 02
34. 29-30 0.8226 0.9496 0.2644 0.1864 30 30 06 06