Open- and Short-Circuit Fault Identification for a Boost dc/dc Converter in PV MPPT Systems

Diego R. Espinoza Trejo, Ernesto Bárcenas, José E. Hernández Díez, Guillermo Bossio and Gerardo Espinosa Pérez
Additional contact information
Diego R. Espinoza Trejo: Coord. Acad. Región Altiplano, Universidad Autónoma de San Luis Potosí, 78700 Matehuala, S.L.P., Mexico
Ernesto Bárcenas: Coord. Acad. Región Altiplano, Universidad Autónoma de San Luis Potosí, 78700 Matehuala, S.L.P., Mexico
José E. Hernández Díez: Coord. Acad. Región Altiplano, Universidad Autónoma de San Luis Potosí, 78700 Matehuala, S.L.P., Mexico
Guillermo Bossio: Applied Electronics Group, Universidad Nacional de Río Cuarto, Río Cuarto 5800, Córdoba, Argentina
Gerardo Espinosa Pérez: Faculty of Engineering, Universidad Nacional Autónoma de México, México City 04510, Mexico

Energies, 2018, vol. 11, issue 3, 1-15

Abstract: This paper proposes a fault identification system for short and open-circuit switch faults (SOCSF) for a dc/dc converter acting as a Maximum Power Point Tracker (MPPT) in Photovoltaic (PV) systems. A closed-loop operation is assumed for the boost dc/dc converter. A linearizing control plus a Proportional-Derivative (PD) controller is suggested for PV voltage regulation at the maximum power point (MPP). In this study, the SOCSF are modeled by using an additive fault representation and the fault identification (FI) system is synthesized departing from a Luenberger observer. Hence, an FI signal is obtained, which is insensitive to irradiance and load current changes, but affected by the SOCSF. For FI purposes, only the sensors used in the control system are needed. Finally, an experimental evaluation is presented by using a solar array simulator dc power supply and a boost dc/dc converter of 175 W in order to validate the ideas this study exposes.

Keywords: fault diagnosis; photovoltaic systems; mppt; boost dc/dc converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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