Keeping this in view, in this paper problem of
finding maximum loadability limits has been solved using firefly algorithm. The
results obtained using firefly is updated using LIA by increasing load in small
steps on PQ buses while voltage
constraint is satisfied. LIA gives quality solution because of its ability of
modifying solution precisely. Due to presence of LIA optimal solution is
obtained for small population size and less number of iterations in FA which
otherwise directly affects the quality of solution. The applicability and
effectiveness of the proposed approach is tested on 30-bus, 118 bus and 300-bus
test systems. From literature survey it is found that approach proposed by [18]
has better results than other existing evolutionary algorithms [9, 16-17].
Therefore in this paper results are compared with results obtained in [18]. On
comparison it is found that the results obtained using proposed approach are
better than [18].