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Table 2 Minimum number and optimal locations of PMUs, and computational time under normal operating conditions ignoring weak buses

From: Weak bus-constrained PMU placement for complete observability of a connected power network considering voltage stability indices

Test system Status of ZIBs # PMU Optimal PMU locations Comp. time/s
14- bus Ig. ZIBs 4 2 6 7 9 0.042
Cons. ZIBs 3 2 6 9 0.056
39- bus Ig. ZIBs 13 2 6 9 10 13 14 17 19 20 22 23 25 29 0.661
Cons. ZIBs 8 3 8 10 16 20 23 25 29 0.154
118- bus Ig. ZIBs 32 3 7 9 11 12 17 21 25 28 34 37 41 45 49 53 56 62 63 68 70 71 76 79 85 86 89 92 96,100,105,110,114 0.140
Cons. ZIBs 27 2 12 15 17 21 23 28 34 37 40 45 49 52 62 63 68 71 75 77 80 85 90 94,101,105,110,114 0.403
300- bus Ig. ZIBs 87 1, 2, 3, 11, 15, 19, 23, 25, 27, 33, 37, 43, 48, 49, 53, 54, 62, 64, 68, 69, 71, 73, 76, 83, 86, 88, 92, 93, 98, 99, 101, 109, 111, 112, 113, 116, 119, 124, 132, 135, 138, 139, 143, 145, 152, 157, 163, 167, 183, 187, 188, 189, 190, 193, 196, 202, 204, 209, 210, 212, 213, 216, 218, 222, 226, 228, 230, 233, 236, 237, 238, 242, 251, 252, 253, 256, 262, 264, 268, 269, 270, 272, 275, 276, 277, 299, 300 1.249
Cons. ZIBs 77 6, 17, 26, 53, 56, 69, 73, 87, 92, 103, 110, 117, 123, 126, 128, 129, 135, 140, 145, 147, 148, 149, 150, 153, 158, 159, 162, 164, 186, 187, 188, 189, 209, 212, 215, 216, 218, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 246, 275, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 292, 293, 295, 296, 297, 298, 299, 300 1.943