A novel PV-MPPT method based on a second order sliding mode gradient observer

TitleA novel PV-MPPT method based on a second order sliding mode gradient observer
Publication TypeJournal Article
Year of Publication2018
AuthorsValenciaga F, Inthamoussou FA
JournalEnergy Conversion and Management
Pagination422 - 430

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 experimental tests.

Research Line: 
Control de sistemas de conversión de energías renovables
High order sliding mode algorithms
Algoritmos por modo deslizante de orden superior
Control of renewable energy systems