Sizing and siting of Distribution Generator for different loads using firefly algorithm

In deregulation of power system, Distribution Generation (DG) plays an important role in the present scenario. The increased power demand and to meet out the peak load demand in the distribution system, DGs are greatly utilized. By placing an optimal location with optimal size of DGs, the real and reactive power losses due to transmission are minimized and also peak load demand is appreciably shared by these DGs. The functions to find the optimal allocation of DG based on real and reactive power losses, line loading, voltage profile, short circuit level index and MVA (Mega Volt Ampere) intake by grid for different load models. Each load model have a significant impact on selecting size and location of the DG. The short circuit level index gives the information about the requirement of the protective devices for the system. For this optimization problem the Firefly Algorithm is chosen as a tool. The above objectives are effectively achieved by the proposed method with the multiobjective approach and tested on IEEE-38 bus node.