DC-link MPPF Capacitors Online Condition Monitoring System for AC/DC power converters integrated in Converter Control System

Authors

  • Fernando Gonzalez-Hernando IKERLAN technology Research Centre Basque Research and Technology Alliance (BRTA) Arrasate-Mondragon, Basque Country (Spain) Author
  • Victor M. Lopez-Martin IKERLAN technology Research Centre Basque Research and Technology Alliance (BRTA) Arrasate-Mondragon, Basque Country (Spain) Author
  • Hodei Balanzategi IKERLAN technology Research Centre Basque Research and Technology Alliance (BRTA) Arrasate-Mondragon, Basque Country (Spain) Author
  • Fernando Rodriguez Aluminium and Film Capacitors Business Group TDK Electronics Components S. A. U. Malaga (Spain) Author
  • Fernando Auñon Aluminium and Film Capacitors Business Group TDK Electronics Components S. A. U. Malaga (Spain) Author

DOI:

https://doi.org/10.52152/3945

Keywords:

DC-link capacitor degradation, Predictive maintenance, Smart inverters

Abstract

In the realm of power electronic converters, the reliability and lifespan of DC-link capacitors play a crucial role in determining the overall system performance. This study contributes to the advancement of knowledge in the field of lifetime management and estimation for DC-link capacitors. It introduces an online estimation algorithm implemented in a 120kW PV inverter demonstrator, utilizing TDK Electronics' ultra-low inductance series B2563* capacitors. The paper demonstrates the implementation of the monitoring algorithm without the need of additional or dedicated voltage and/or current sensors during converter operation. All calculations are based on existing variables or estimates of capacitor variables. The impact of factors such as ambient temperature, managed power, and DC-Link voltage is analysed and tested in the prototype.

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Published

2024-08-06

Issue

Vol. 22 No. 3 (2024)

Section

Articles