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oai:ebiltegia.mondragon.edu:20.500.11984/16672024-03-04T12:33:44Zcom_20.500.11984_473col_20.500.11984_478

00925njm 22002777a 4500 dc GARAYALDE, ERIK author Aizpuru, Iosu author Canales, Jose Maria author 2019 Energy Storage in photovoltaic installations has increased in popularity in recent years due to the improvement in solar panel technology and energy storage systems. In several places where the grid is not available, in remote isolated rural locations or developing countries, isolated photovoltaic installations are one of the main options to power DC micro-grids. In these scenarios, energy storage elements are mandatory due to the natural day-night cycles and low irradiation periods. Traditionally, lead-acid batteries have been responsible for this task, due to their availability and low cost. However, the intermittent features of the solar irradiance patterns and load demand, generate multiple shallow charge–discharge cycles or high power pulses, which worsen the performance of these batteries. Some Hybrid Energy Storage Systems (HESSs) have been reported in the literature to enhance the lifetime and power capabilities of these storage elements, but they are not intended to overcome the Partial State of Charge (PSoC) issue caused by daily cycles, which has an e ect on the short and mid-term performance of the system. This paper studies the impact of the already proposed HESSs on PSoC operation, establishing the optimal hybrid ratios, and implementing them in a real installation with a satisfactory outcome. 1996-1073 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=153687 https://hdl.handle.net/20.500.11984/1667 Energy Storage Systems Standalone Photovoltaic Systems Hybrid Energy Storage Systems LiFePO4 batteries Lead Acid batteries Partial state-of-charge mitigation in standalone photovoltaic hybrid storage systems