INTERNSHIP R&D ENGINEER - Prototyping of a 10 kV Flying Capacitor Quasi Two Level converter for MVDC applications
Société : SuperGrid Institute Lieu : Rhône (Auvergne-Rhône-Alpes)
Présentation de l'entreprise
Créée en 2014, SuperGrid Institute est une société privée indépendante, acteur de la transition énergétique en France et dans toute l’Europe, regroupant plus de 150 collaborateurs de 21 nationalités différentes. Spécialiste des systèmes électriques innovants à courant continu en haute et moyenne tension (HVDC et MVDC). SuperGrid Institute participe également au développement de nouvelles technologies pour l’intégration des énergies renouvelables dans les réseaux électriques du futur.
SuperGrid Institute est classée sur le podium et le top 10 de l’INPI depuis 2018.
Pour plus d’infos, visitez notre site : www.supergrid-institute.com
Descriptif du poste
Société : SuperGrid Institute Catégorie : Stage Activité : Industrie Filiere : Assurance Metier : Ingénieur d'études et développement Lieu : Rhône (Auvergne-Rhône-Alpes) Durée : Stage
Mission
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: www.supergrid-institute.com
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 [1].
The massive integration of Renewable Energy Sources (RES) in the future will most probably require the development of MVDC networks at different scales of extent. One of the building blocks of such networks are DC DC converters required adapt to the different levels. To achieve the high voltage, series connection of SiC MOSFETs is necessary[2], but this comes at the cost of increased common mode currents and fast degradation of solid insulation of Medium Frequency Transformers. An emerging strategy is to employ Flying Capacitor Converters in a Quasi Two Level modulation. Simulation level studies have proven this converter [3], but not much is available on litterature on practical réalisations.
SuperGrid institute has lounched a phd thesis on this subject and the intern will be helping with the prototyping. Getting practical experience on this kind of converter is mandatory to better understand their performance and limitations.
Benefits :
* Remboursement des transports à 50%
OBJECTIVES / MISSIONS
The goal of the internship is to prototype a 10 kV - 250 kW Flying Capacitor Converter for Quasi Two Level Modulation based SiC MOSFET (1.7 kV or 3.3 kV) and implement it in our test platforms. The intern must prototype the PCB for power MOSFETs and for the gate drivers on Altium.
TASKS
* Literature review
* LTspice Simulation of Flying Capacitor Converter
* Convert the design of the existing gate driver on Altium
* Prototyping the converter
* Sizing of Flying Capacitors
* Consideration of Insulation constraints
* Instrumentation (voltage and current measurement)
* Test and validation of the Converter
Profil recherché
CANDIDATE PROFILE
Master or engineering school student in the last year of his/her studies. The student must have a good knowledge in electrical engineering (power electronics and power systems). An experience with the Altium, LTspice, Matlab/Simulink, Python is appreciated and hands on experience with power electronics tests. Good proficiency in English is required. This internship can lead to a thesis or fixed position opportunity for a talented candidate.
WHAT WE HAVE TO OFFER:
* You will be joining an institute for energy transition, a promising and stimulating field of activity,
* A young, dynamic working environment,
* Diverse, international teams (+25 nationalities),
* Contribution to meal expenses (company restaurant)
* Sports club within the company (on-site yoga, football, running, etc.)
* Use of self-service company bicycles
