To check the applicability of proposed approach on a large test system, it is tested on 300-bus system which consists of 69-generators, 201-PQ buses, 29-shunts, 411- Branches and 107-Transformers. The busdata and linedata is as given in [31]. Generally voltage constraint for transmission system is ± 5% while for study purposes, in this paper voltage constraint is relaxed and considered from 0.9 p.u to 1.0 pu. The coding of buses is considered as in [31].