LEICI   25638
INSTITUTO DE INVESTIGACIONES EN ELECTRONICA, CONTROL Y PROCESAMIENTO DE SE√ĎALES
Unidad Ejecutora - UE
artículos
Título:
A Novel PV-MPPT Method Based on a Second Order Sliding Mode Gradient Observer
Autor/es:
FERNANDO INTHAMOUSSOU; FERNANDO VALENCIAGA
Revista:
ENERGY CONSERVATION AND MANAGEMENT
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2018 vol. 176 p. 422 - 430
ISSN:
0196-8904
Resumen:
Leading PV system operation at its Maximum Power Point (MPP) is crucial to improve the overall system efficiency and reduce the solar energy cost. In such a sense, this paper  presents a closed-loop Maximum Power Point Tracking (MPPT) method based on the combination of a Second Order Sliding Mode observer (SOSMO) and a traditional PI controller. The particular SOSMO proposed is especially appropriate to deal with finite time power gradient estimation even in the presence of unmodeled dynamics and external perturbations. Based on this estimation, the PI controller is used to quickly drive the PV system to operate on its MPP and tracking its variations. The resulting closed-loop scheme presents a fast tracking dynamics during rapidly changing environmental conditions having good accuracy and a moderate computational burden. The closed-loop system performance is evaluated using representative computer simulations and corroborated through experimentaltests.