On varying population size and number of iterations for 30-bus system, the results obtained are shown in Fig 2. It is clear from Fig 2 that a small population size of 20 and itmax 20 gives optimal solution while there is no variation in solution quality as number of iterations is increased for population size 20. It is also evident from Fig 2 that as size of population increases from 30-40 and onwards, it takes more number of iterations for optimal solution. Similar pattern is observed for increase in number of iterations for a given population size as solution is not improving while it increases computational burden Therefore a small population size is considered as good option for quality solution for 30-bus test system. In this paper, a small population size and less number of iterations converge to a quality solution because of LIA. In LIA the solution obtained after given number of iteration from FA is considered as input and is incremented in small steps and the solution is modified precisely. Therefore for 30-bus test system, population size of 20 and itmax of 20 is considered for comparison and validity of suggested algorithm.  It is also evident from Fig 2 that loadability lie in a narrow range of 277.79 MW to 280.34 MW for various population size and number of iterations because of LIA which modifies load on PQ buses one by one till there is scope of load addition.