Abstrait

Optimal Sizing and Sitting Of Distributed Generations For Relieving Congestion

R.M.Sasiraja, Dr.V.Suresh Kumar, S.Ponmani

In power system, unexpected outages of generation, sudden increase of demand, tripping of transmission lines, or failures of other equipment have led to congestion in one or more transmission lines. The network loading is maintained within the specified norms for system secure operation. Generation rescheduling and/or load shedding can relive the non-severe congestion and the severe congestion has to be relieved by some improved method. With the wide application of distributed generation (DG) sourcecongestion management is done by optimumplacement of DG in the distribution network.As it is known that non-optimal size and non-optimal placement of DG units may lead to high power loss and bad voltage profiles, therefore, this paper uses, Line Flow Sensitivity Factor (LFSF) analysis to determine the optimal location of DG units, as well as Genetic Algorithm (GA) for determining the optimal size of DG in distribution systems. A multi-objective function is created to minimize the total losses and improve the voltage profile of the distribution system.This methodology is tested on IEEE-30 bus system. The optimal placement and sizing of DG was found to be robust and provided higher efficiency for the improvement of the voltage profile and minimization of losses.