Loss Minimization of Distribution System Using Distributed Generation

ABSTRACT

Modern utilities are continuously planning the expansion of their electrical networks to face the load growth and to properly supply their consumers. Distributed generation (DG) is a rapidly growing technology that helps to achieve this objective. This article presents computationally efficient and numerically robust distribution flow equations for the power flow solution of distribution system with distributed generation. The loss minimization problem is formulated as non-linear optimization programming, where the objective is to minimize the real power losses. The constraints are the power balance equations and voltage balance equations. The upper and lower limits of voltages are considered. The non-linear programming is solved by Newton's method. The effects of distributed generation on the system voltage profile and losses have been analyzed. The results show that the voltage profile is improved and losses are reduced, when DG is incorporated in the system. The methodology is applied to IEEE-13 bus distribution test system.