Reliability assessments of an islanded hybrid PV-diesel-battery system for atypical rural community in Nigeria

Esan, Ayodele Benjamin and Agbetuyi, F. and Oghorada, O. and Ogbeide, Kingsley and Awelewa, A.A. and Afolabi, A.E. (2019) Reliability assessments of an islanded hybrid PV-diesel-battery system for atypical rural community in Nigeria. Heliyon, 5. ISSN 2405-8440

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This paper presents the use of a novel approach in assessing the generation reliability of a hybrid mini-grid system(HMS) based on the optimal design result obtained from the HOMER software. A typical Nigerian rural com-munity–Lade II in Kwara State was used as a case study where the energy demand for the residential andcommercial loads was 2.5MWh/day and 171kWh/day respectively. The optimized HMS results from HOMERcomprising of a solar photovoltaic (PV) array (1.5MW), diesel generators (350kW) and battery storage (1200units) has a combined least net present cost of $4,909,206 and a levelized electricity tariff of $0.396 per kWh.Contrasting the HMS with a diesel-only system for the community, an approximate 97% reduction in all pollutantemissions was observed. Furthermore,fluctuations in diesel fuel prices, variations in average solar insolation, andvariations in the solar PV's capital/replacement costs were utilized in conducting a sensitivity analysis for theHMS. The capacity outage probability table (COPT) was utilized in validating the reliability of the simulationresults obtained from HOMER. The HMS was observed to experience a load loss of 0.769MW, 0.594MW&0.419MW when zero, one and two diesel generator(s) respectively were operational for all of the Solar PV's andBatteries being off-line. The loss of load probability (LOLP), loss of load expectation (LOLE), and total expectedload loss (ELL) obtained from the COPT were 5.76�10�8, 5.0457�10�4hr/yr and 0.025344Watt respectively.The results show the reliability of the HMS and also depicts a highly economical and feasible hybrid energysystem.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Date Deposited: 15 Oct 2019 14:08
Last Modified: 15 Oct 2019 14:08

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