Photovoltaic Inverter Reliability Study through SiC Switches Redundant Structures

Reliability is a very important issue in power electronics; however, sometimes it is not considered, studied, or analyzed. At present, renewables have become more popular, and more complex setups are required to drive this type of system. In the specific case of inverters in photovoltaic systems, th...

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Bibliographic Details
Published in:Technologies (Basel) 2023-04, Vol.11 (2), p.59
Main Authors: Villanueva, Ignacio, Vázquez, Nimrod, Vaquero, Joaquín, Hernández, Claudia, López-Tapia, Héctor, Osorio-Sánchez, Rene
Format: Article
Language:English
Subjects:
Alternative energy sources
Analysis
Design and construction
Electric inverters
Failure analysis
Failure rates
Inverters
Materials
MIL HDBK-217F
Monte Carlo simulation
MTBF
Photovoltaic power generation
Random variables
Redundant components
redundant structures
reliability
Reliability (Engineering)
Reliability analysis
SiC MOSFET
Silicon carbide
Solar energy
Structural reliability
Switches
System reliability
transformerless photovoltaic inverter
Useful life
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Summary:Reliability is a very important issue in power electronics; however, sometimes it is not considered, studied, or analyzed. At present, renewables have become more popular, and more complex setups are required to drive this type of system. In the specific case of inverters in photovoltaic systems, the user’s safety, quality, reliability, and the system’s useful life must be guaranteed. In this paper, the reliability of a full bridge inverter is predicted by calculating metrics such as failure rates and Mean Time Between Failures. Reliability is obtained using different types of structures for SiC MOSFETs: serial systems, active parallel redundant systems, and passive parallel redundant systems. Finally, the reliability study shows that a system with a passive parallel redundant structure is more reliable and has a higher useful life compared to the other structures.
ISSN:2227-7080
2227-7080
DOI:10.3390/technologies11020059