JOURNAL OF SCIECNCE TECHNOLOGY AND EDUCATION 8(3), SEPTEMBER, 2020 ISSN: 2277-0011; Journal homepage: www.atbuftejoste.com Corresponding author: Sanusi, Y. S. yinkasan@yahoo.com Department of Mechanical Engineering, Ahmadu Bello University, Zaria. © 2019 Faculty of Technology Education, ATBU Bauchi. All rights reserved 77 Techno-economic Analysis of Hybrid Diesel Generator/PV/Battery Power System for Telecommunication Application Sanusi, Y. S., Dandajeh, H. A., Mustapha, H. Department of Mechanical Engineering, Ahmadu Bello University, Zaria, P.M.B 1045, Nigeria ABSTRACT In this study, the techno-economic analysis of a hybrid diesel generator/PV/battery power system was carried out for telecommunication substation in Nigeria. A case study of a telecommunication substation located at Mabushi, Abuja was considered. Homer Pro software was used to carry out the technical, economic and environmental analysis of different configurations of power systems: DG only system, DG/Battery system, PV/Battery system and DG/PV/Battery system. The systems were compared with the DG/PV/Battery power system installed at Mabushi substation. Results show that the currently installed DG/PV/Battery system is oversized when compared with the optimized DG only system, DG/Battery system and DG/PV/Battery system. The installed DG/PV/Battery system has the least capacity factor of 6.42% when compared to other systems. The optimized DG/PV/Battery system has a capacity factor of 16.88 %. The pure renewable system (PV/Battery system) has the highest NPC and COE. This is due to PV/Battery system high capital cost that contributed about 87.5% of total facility cost. The optimized PV/Battery/DG presented in this study gave the least NPC and COE of $51,291 and $0.453 respectively as compared to NPC and COE of $63,600 and $0.592 obtained in the currently installed power system. This implies that the optimized PV/Battery/DG system presented in this study is the most viable of all the systems considered and is therefore recommended for installation at the studied telecommunication substation. The sensitivity analysis of the diesel price on the COE in the recommended system shows that for 100 % price increase in diesel fuel, the COE increases by about 30%. This is due to the fact that the integration of the PV/battery to the DG cushions the direct effect of the increased fuel price on the COE. INTRODUCTION Telecommunication restructuring framework led to the introduction of GSM to Nigeria in 2001(Nkordeh, Bob-Manuel, & Olowononi, n.d.). Recent statistics has shown that the subscriber identity module (SIM) penetration in Nigeria is 82% and the number of lines connections is 151.8 million (“SMA Intell. Data,” 2017). The growing number of subscribers has necessitated the ARTICLE INFO Article History Received: February, 2020 Received in revised form: April, 2020 Accepted: May, 2020 Published online: August, 2020 KEYWORDS Techno-economic Analysis, Hybrid Diesel Generator, Power System