A simulation study of EEPCo´s medium voltage distribution feeders for technical power loss reductions: A case study of technical power losses in the outgoing feeders from Sebeta substation

The paper presents research findings from a simulation study on technical power loss reductions in selected outgoing feeders of 15-kV to distribution transformers in one Sub-station of Ethiopia´s growing power system. In the simulation process for modeling the power losses in the medium voltage transformation sub-networks, the well-known software DigSILENT has been employed. Combinations of power loss sources were considered for testing the performances of four selected feeders from Sebeta I Substation to parallel distribution transformers supplying electric power to consumers´ centers mainly in south west Addis Ababa. Maximum loading of the outbound feeders from the Substation to the Medium Voltage distribution transformers located at different load centers were examined during peak load hours. Along the selected routes, with all transformers loaded to their 60% capacities, the total nominal power losses in the feeders and the transformers were also appraised. Alternative technical power loss reduction techniques have been studied with different loading considerations. Further simulation studies supported by power loss measurements and relevant applications of information communications technologies for sustainable development are also strongly recommended.