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Table 11 Comparison of computational time with existing methods ignoring and considering ZIBs

From: Allocation of synchronized phasor measurement units for power grid observability using advanced binary accelerated particle swarm optimization approach

Test system

Modified BPSO [12]

Improved PSO [14]

Proposed methods

Ig. ZIBs

Cons. ZIBs

Ig. ZIBs

Cons. ZIBs

Ig. ZIBs

Cons. ZIBs

Comp. time (s)

Comp. time (s)

Comp. time (s)

Comp. time (s)

Comp. time (s)

Comp. time (s)

14-bus

1.5

1.60

0.97

0.97

30-bus

6.8

3.60

8.20

12.20

2.92

2.13

39-bus

9.00

11.73

27.78

7.92

6.47

57-bus

25.80

35.00

33.64

14.00

12.59

118-bus

51.00

49.80

96.27

44.72

41.69

246-bus

181.01

160.07

300-bus

231.82

289.55

  1. “–” means not reported
  2. Ig. and Cons. ignoring and considering; Comp. computational