Battery-Integrated Hybrid Renewable Energy Optimization to Reduce Intermittency in Weak Grids by Supplying Baseload-Like Generation Profile
Keywords:
Non-dispatchable Renewable Energy Integration, Hybrid, Weak Grids,, BatteryAbstract
Being non-dispatchable and intermittent, wind and solar energy is least favorable in the eyes of grid operator. One of the solution to RE’s intermittency is Battery Energy Storage System (BESS) which can store energy and dispatch them as necessary. Major drawback of BESS is high upfront cost; hence the utilization of BESS should be optimized to achieve competitive Cost of Energy (COE) while providing stable electricity. This paper presents a study on best combination of intermittent renewable sources coupled with BESS and diesel generator to provide stable and baseload-like constant power daily. Taking case from Sumba Island in East Nusa Tenggara which represent small-to-medium sized island with abundance renewable energy source but minimum grid support system, the hybrid renewable is configured using HOMER software to analyze net present cost, cost of energy, BESS operational pattern and allocation. The research found out that combining BESS+PV+wind yield the lowest cost of energy and net present cost. Most of the time BESS recover its state of charge at noon where PV panels yield is biggest. Inclusion of diesel in the system reduce the net present cost & cost of energy owing to the smaller capacity of BESS needed to provide base-load like. Full renewable energy system is able to provide baseload-like yield to reduce intermittency with some limitations taking into accounts.
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