Looking
at Fig 4 it is found that the results for both cases lies in a narrow range
from 23988 MW (worst) to 23994 MW (best) due to LIA which increases load
precisely on PQ buses till voltage
constraint is met. The statistical analysis is done for both cases and presented
in detail in Table 10. Best, mean and worst solution for both cases is
compared. It is clear from 3rd column of Table 10 that the best
solution in both cases is almost same while mean and worst solution are also
comparable. But there is difference in computational time for both cases per
trial. It is 420.4 sec more in case 2 per trial.