The student Unai Atutxa Olmos obtained a GOOD qualification

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The student Unai Atutxa Olmos obtained a GOOD qualification

THESIS

The student Unai Atutxa Olmos obtained a GOOD qualification

2023·03·09

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Thesis title: Suitability Analysis, Design and Protection of an Active Modular Rectifier Architecture for a More Electric Aircraft

Court:

  • Chairmanship: Jon Andreu Larrañaga (UPV/EHU)
  • Vocal: Maider Santos Mugica (Tecnalia)
  • Vocal: Ander Ávila del Pozo (Ikerlan)
  • Vocal: Jose Antonio Cortajarena Echeverria (UPV/EHU)
  • Secretary: Gonzalo Abad Biain (Mondragon Unibertsitatea)

Abstract:

Aiming to reduce the pollution caused by the traditional aircraft, strong research efforts are done towards the aircraft electrification to reduce the fuel usage. Thus, high efficiency, high power density and high reliability are some of the main characteristics expected from the future More Elecetric Aircraft (MEA), among others. In this context, the development of a HVDC-based aircraft distribution grid with bidirectional power flow capability results an interesting alternative to increase the distribution efficiency, reduce cable weight and provide bidirectional power-flow capability.

This PhD thesis focuses on replacing the conventional AC/DC converters for a high-efficient, high-power-dense, fault-tolerant and bidirectional active modular rectifier architecture which enhances the implementation of a HVDC primary distribution-based MEA EPS. For that purpose, the potential active AC/DC topologies for the defined application are reviewed and their suitability in MEA applications has been studied. Afterwards, a topology evaluation is performed aiming to find the most suitable active AC/DC topology.

Based on the comparison results, three converter configurations are proposed which are used for designing three different active modular architecture which comply with the aviation standards. The three architectures are then compared in terms of efficiency, power density and reliability aiming to identify the most promising solution.

Finally, the resulting active modular architecture is integrated into the MEA power system to study its fault-tolerant capability. Thus, two different power system topologies are evaluated considering the integration of the active modular architecture with a proposed comparison methodology focused on efficiency, weight, survivability and fault clearing speed.