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Comparative Evaluation of Lifetime of Three-Level Inverters in Grid-Connected Photovoltaic Systems

Author

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  • Ui-Min Choi

    (Department of Electronic and IT Media Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

  • June-Seok Lee

    (School of Electronics and Electrical Engineering, Dankook University, Yongin-si 16890, Korea)

Abstract

The cost of the PV energy reduction is still required to increase the penetration level of PV systems in the energy market. The reliability of PV inverters is one of the important aspects to be enhanced in order to reduce the cost of PV energy, since it is closely related to the maintenance cost and the annual energy production. In this paper, the lifetime of NPC and T-type inverters, which are three-level inverter topologies that are widely used for PV systems, are comparatively evaluated with a 30 kW grid-connected PV system. It is performed by focusing on power devices since the power electronic components of both converters are the same except for the power devices. Therefore, this result can represent the comparison of the reliability performance of the NPC and T-type inverters. The power loss and temperature distributions of power devices are analyzed and their efficiencies are compared at different power levels with different switching frequencies. The lifetimes of the reliability-critical power devices in the NPC and T-type inverters are estimated, respectively with a one-year mission profile of the PV system, and the results are compared.

Suggested Citation

  • Ui-Min Choi & June-Seok Lee, 2020. "Comparative Evaluation of Lifetime of Three-Level Inverters in Grid-Connected Photovoltaic Systems," Energies, MDPI, vol. 13(5), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1227-:d:329489
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    Citations

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    Cited by:

    1. Adyr A. Estévez-Bén & Alfredo Alvarez-Diazcomas & Juvenal Rodríguez-Reséndiz, 2020. "Transformerless Multilevel Voltage-Source Inverter Topology Comparative Study for PV Systems," Energies, MDPI, vol. 13(12), pages 1-26, June.
    2. Yunting Liu & Leon M. Tolbert & Paychuda Kritprajun & Jiaojiao Dong & Lin Zhu & Thomas Ben Ollis & Kevin P. Schneider & Kumaraguru Prabakar, 2022. "Fast Quasi-Static Time-Series Simulation for Accurate PV Inverter Semiconductor Fatigue Analysis with a Long-Term Solar Profile," Energies, MDPI, vol. 15(23), pages 1-24, December.
    3. Faisal Wani & Udai Shipurkar & Jianning Dong & Henk Polinder, 2021. "Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines," Energies, MDPI, vol. 14(20), pages 1-25, October.

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