Optimization of DG placement in distribution system using artificial bee colony algorithm based on generation level reliability indices

Optimum placement of DG in distribution system, is highly dependent on the goal of using it. One of main purposes is to increase the reliability of power system. In order to evaluate reliability of system, some quantized indices are used in different levels of power system. Considering recent progresses made in technology and taking DGs into account as reliable power sources, authors of this paper propose to evaluate the reliability of distribution system with power adequacy indices used in generation level of power system. To do so, a composite reliability index is introduced. Then in order to find optimum placement of DG units in Distribution system, artificial bee colony algorithm is used. Simulations are done in three different scenarios and repeated with an increase of 25% in maximum capacity of DGs. To evaluate obtained results, the same process is done with genetic algorithm. Simulation results show the validity of the proposed method.