Optimal Placement of DG Units in Distribution Network Using APCSA and OBOSA for Power Loss and Execution Time Minimization

Abstract

The necessity for flexible electric systems, changing regulatory & economic scenarios, energy savings & environmental impact are providing impetus to the development of distributed generation (DG), which is predicted to play an increasing role in the electric power system of the near future. Allocation of DG units at non optimum places can result low or over voltages in the network. On the other hand, the installation of DG can have positive impacts on the distribution system by enabling reactive power compensation for a voltage control, reducing the losses, contributing for frequency regulation and acting as spinning reserve in the main system. For that reason, the use of a methodology capable of analyzing the influence on some system characteristics of DG allocation can be very useful for the system planning engineer when dealing with the increase of DG penetration that is happening nowadays. This paper presents two newly developed backward forward sweep load flow based algorithms to determine the optimal location to place a DG unit in IEEE 33 and IEEE 69 test bus distribution systems to improve the voltage profile of the entire system as well as power loss minimization. The proposed methods are found to be very effective for power loss minimization with fast convergence.