Internship – Mechanical damping for the high voltage DC breaker operation (F/M)

SuperGrid Institute

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 center, we are dedicated to developing technologies for the future power transmission system, the “supergrid”, including HVDC & MVDC technologies.

As a multi-disciplinary research center 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

To protect effectively an HVDC grid and its related equipment. The cornerstone is the operating speed of the DC breaker, which must be one order of magnitude faster than AC protection. To this end, the breaker (conducting several kiloamps or withstanding several tens of kilovolts) includes a mobile electrode and the opening and closing of which is operated by an actuator, capable of providing significant accelerations.

This operation speed allows the mobile contact to complete the whole stroke (a few tens of millimeters) in a few milliseconds. However, to meet this requirement, the whole payload acquires a lot of kinetic energy which must be damped to prevent mechanical damage.

Objectives / Missions

A first step based on the analytical modelling of the system movements will be necessary to quantify the damping need. Then, a review of the existing technical solutions will lead to the selection of a damping strategy, to assess using the model. An experimental approach will be developed to adjust the damping system and to compare theoretical results. An improvement process between simulations and experimental measurement may be necessary. 

Candidate Profile

Mechanical modeling and simulation must be mastered by the candidate. A prior knowledge of modelling tools such as Matlab/Octave is necessary, COMSOL appreciated. Solution analysis and experimental approaches are required, and basic knowledge in electrotechnical / electromagnetic fields would be a plus. A proactive and methodical candidate will be preferred.   

Other information

The application has to include the internship title, candidate name, CV and the most recent marks. Applications should be sent to the following address:

SuperGrid Institute is an equal opportunities employer. We respect and value the diversity of our employees, their backgrounds and their professional experience. We believe in equality and take affirmative action to ensure that discrimination has no place in our recruitment process nor our company.

Job Features

Job CategoryInternship
Contract TypeInternship
Duration6 months
Start DateSeptember 2020
Qualification requiredNone

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