Abstract
Integrated renewable energy system (IRES) is integration of different energy sources to provide uninterrupted and viable solution for electrification especially for areas not connected to main grid due to difficult terrain and economic reasons. IRES has many advantages like non-depleting, non-polluting nature, better load matching and better renewable energy utilization. In the present study, mathematical modelling, size optimization and techno-economic analysis of standalone IRES have been carried out. Hybrid system is modelled to have maximum contribution from wind and solar energy with minimum net present cost (NPC) of system to meet electric load demand of CRC building, IIT Madras, India (13.01°N and 80.24°E). The results show that most feasible system configuration consists of 12 kW Photovoltaics, 3 kW wind turbine and 15 kW biogas generator with NPC and cost of energy equal to $ 117,098 and $ 0.09/kWh respectively. The IRES generates 71,826 kWh of energy to meet AC load of 64,396 kWh per year. The capacity factor and percentage contribution of PV, wind turbine and biogas generator are 17.8%, 6.57%, 39.1% and 26%, 2.4%, 71.6% respectively. The paper also presents sensitivity analysis of hybrid system with variation in capital cost of different components.
Highlights
Uninterruptible and viable power supply to every household is one of the main challenge Indian government has taken, especially in rural and remote places which due to difficult terrain or due to economic reasons not connected to the main power grid
Optimal sizing analysis of integrated system components The effectiveness of optimization strategy in the proposed system is demonstrated by finding the contribution of individual components involved namely wind turbine, PV, battery, biogas generator and converter system
Economic analysis of hybrid system The optimisation process is based on net present cost which is total capital cost, operation & maintenance (O&M) cost, replacement cost and salvage cost of all components of integrated system over the project life
Summary
Uninterruptible and viable power supply to every household is one of the main challenge Indian government has taken, especially in rural and remote places which due to difficult terrain or due to economic reasons not connected to the main power grid. Most of the study did not optimize the system, considering seasonal variation in energy load demand This is important for accurate designing of hybrid system to have maximum resource utilization with minimum system cost to meet load demand all time. Present study focus on size optimization and economic analysis of hybrid integrated renewable energy system with seasonal load demand. Different component of hybrid energy system includes wind turbine, solar PV, solar charge controller, inverter, battery, control panel, and biogas generator. Mudgal et al: Techno-Economic Analysis of Standalone Solar Photovoltaic-Wind-Biogas Hybrid Renewable Energy System for Community Energy Requirement weekdays to weekends and from season to season for accurate designing of hybrid system to have maximum utilization of resources and minimum system cost. Where Cann is annualized cost, CRF is capital recovery factor, i is annual real discount rate, Rproj is project lifetime (25 years)
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