ABSTRACT

MANSUR. Electrical Power Distribution Network Losses Analysis using Delphi Programming Language: A Case Study on the Power System in Makassar Branch of the Indonesian Electrical Power Company PT. PLN (Persero), (supervised by Salama Manjang and Yustinus Upa Sombolayuk). 

Electrical power losses in a distribution network can be represented as a function dependent on time, current and the length of conductors. In the operation of a wide distribution network, determining the losses is a major problem. Only an accurate calculation of the losses will increase the system’s efficiency and quality, as well as the security against the electrical power mistreatment. 

The goal of this research is to determine accurately the losses in the primary distribution network, distribution transformers and the secondary distribution network. The result of the calculation will be useful as a consideration to plan a system reconstruction in order to increase the system’s performances. 

Borland Delphi version 7 has been used as the programming tool to calculate the losses using a numerical method integrating all currents flowing in all conductors and transformers in a distribution network. To simplify the computation, samples of feeders have been randomly selected. The result of the analysis has shown that in the Makassar Branch of the Indonesian Electrical Power Company PT. PLN (Persero), the power losses is approximately 1.27 %.