CDD – Power electronics system engineer in medium voltage applications – evaluation of converter topologies

Posted 1 month ago

SuperGrid Institute brings together 180 employees, of 28 different nationalities who work together within a dynamic environment in the city of Lyon. As an independent research and innovation centre, we are dedicated to developing technologies for the future power transmission system, the “supergrid”, including HVDC & MVDC technologies.

As a multi-disciplinary research centre with advanced simulation capabilities & multiple test platforms, including numerous associated laboratories, SuperGrid Institute uses its comprehensive expertise to provide a wide range of services and solutions to support our customers in developing power systems, equipment and components. We specialise in system architecture and work on ensuring network security and stability while allowing for the integration of intermittent renewable energy sources. Find out more by visiting our website:

General Context

The medium voltage direct current (MVDC) technology is emerging in power distribution and collection after the high voltage direct current (HVDC) has been demonstrated and exploited as the economically viable solution for long-distance transmission of bulk power. The MVDC technology has been implemented in some pilot projects in China and Europe. The researchers evaluate the interest of MVDC in solar and wind applications. The benefits of MVDC technology can be analysed in terms of energy efficiency, power dispatch, power capacity, power supply range, raw material consumption, CO2 emissions, resilience of distribution network or ancillary services to the AC grid ( A power converter is the key enabling technology in the MVDC systems. AC-DC converters interface with AC systems (either high, medium or low voltage) and DC-DC converters interface with DC systems (

Objectives / Missions

The selected candidate will support the R&D team working on power electronics systems for medium voltage applications. She/he will evaluate the key performance indicators (KPI) of AC-DC converter topologies and asses the most suitable topology for MVDC applications. This mission will be a continuation of the development of a method and tool. The scope of work includes:

  • Implementation in Matlab/Simulink
    • KPIs calculation for modular multilevel converter (MMC) and neutral point clamped (NPC) converter,
    • Implementation of the KPIs calculation for an innovative converter topology.
  • Analysis
    • Transient simulations of the 3 converter topologies
    • Converter design tunning to meet the system requirements (PQ diagram, harmonics, fault ride through, DC faults, …),
    • Parametric analysis exploiting the converter design degrees of freedom (power semiconductor, …) for different applications (rated power and voltage).
  • Synthesis
    • Writing a technical report with the clear conclusion (spider charts, …),
    • Writing a scientific article.

The mission could be extended with some studies related to DC-DC converters.

Candidate Profile

  • Master (or equivalent) in electrical engineering specialised in power electronics and/or power systems,
  • strong analysis and synthesis skills,
  • team work,
  • autonomy,
  • proactivity,
  • problem solving,
  • presentation skills,
  • rigour,
  • curiosity and creativity,
  • English/French speaking.

Please send your application to the following adress :

Job Features

Contract TypeCDD
Duration6 months
Start DateSeptember 2022

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