Sizing Optimization and Techno-Economic Analysis of a Hybrid Renewable Energy System Using HOMER Pro Simulation

Kumar, Sonu ; Sethuraman, Chelliah Pillai; Gopi, Chandru

Abstract

Hybrid renewable energy system (HRES) is the integration of multiple energy generating systems installed to generate energy from the renewable sources such as Solar Photovoltaic (PV), wind, bio-generator etc. It is very prudent to determine viable combinations, optimum sizing and to have a techno-economic analysis of HRES before its procurement and installation. In this study two optimum system was modelled using HOMER Pro (open-source version) to meet the electrical load demand of an institution located in Chennai (12.59°N and 80.14°E) and to get the minimum Net Present Cost (NPC) of the proposed system. Based on the modeling, for optimum-1 system the capacity factor and contribution percentage of PV, wind turbine and bio-generator was found to be 79.41%, 0.98%, 19.61% and 92.83%, 0.43%, 6.75%, respectively. And for optimum-2 system, it was 85.86%, 2.02%, 12.12% and 93.31%, 0.82%, 5.87%, respectively. Sensitivity analysis was carried out to find out the variations on NPC and Cost of Energy (COE) by adjusting the cost of PV, wind turbine, battery, converter, bio-generator and fuel, from 0.8 to 1.2 times of its present cost. Based on HOMER Pro simulation, the most feasible system obtained was optimum-1 which consists of 81 kW photovoltaics, 1 kW wind turbine, 20 kW biogas generator, 47.3 kW converter and lead acid battery (rated 101 Ah/12 V-150 numbers) with NPC at $ 1,84,687 to generate energy 1,35,978 kWh per year.


Keyword(s)

Cost of energy, HOMER Pro, HRES, Net present cost, Sensitivity analysis

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