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Docotrat - Thèse en co tutelle CNRS/G2Elab/NTU Singapo

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Français - Anglais

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General information

Reference : UMR5269-NADMIC-004
Workplace : GRENOBLE
Date of publication : Tuesday, October 01, 2019
Scientific Responsible name : Nouredine HADJ SAID, Vincent DEBUSSCHERE
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 December 2019
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly

Description of the thesis topic

In a context where we consider that we can isolate part of a distribution grid for an autonomous
operation over a finite duration, the main questions are to define what part of the grid can be
isolated, in what context (i.e. definition of the criteria) and in what operational conditions
(energy autonomy, stability limits, congestions constraints, security of the power system, etc.)
A smart power electronic device will be developed in NTU, based on the Soft Open Point (SOP)
principle, that will operate as the point of common coupling between the part of the distribution
grid that can be isolated for a given duration and the main grid (we can consider multiple points
of connection). To correctly size the device, the first objective of this thesis is to define at least
enough operational scenarios that will help design the specifications. Those scenarios will also
be used in a decentralized control that should accompany the temporary microgrid in its
transitions between interconnected and islanded. We will mainly consider technical and
economic criteria in the optimizations, but alternative criteria could be considered in a second
step (environmental impacts like CO equivalent emission of the energy mix).

2
An experiment is planned during the PhD to validate the optimal control methods, the criteria
to operate the transition between modes and the operation considering the SOP developed in
NTU. To support that, the G2ELab possess a unique installation in France, presenting an actual
distribution grid, all components being real and controllable locally or remotely. It is also
possible to link this platform with a real-time simulation target for an increase range of
possibilities (pre-validation of the SOP before integration in the grid for example).
On a longer time horizon, the studies could also be used to analyze the operation of a
distribution grid whose parts can be, voluntarily or not, isolated and then deduce useful
information regarding the location (and why not the number) of SOP in the grid.

Work Context

The thesis should be a joint PhD (or at least a co-supervision) between G2ELab in Grenoble
and NTU in Singapore. A second PhD is being launched in NTU in parallel (on the design of
the SOP smart device) and should interact with this thesis. In the case of a joint PhD, at least
one year should take place in Singapore (with in the end both diploma from NTU and Univ.
Grenoble Alpes). In the case of a co-supervision, except short missions in Singapore, the PhD
will be held in Grenoble only, with online meetings with NTU.

Constraints and risks

No particular risks exist for this thesis, expect those linked to the possibility to conduct
experiments in low voltage (a formation is provided by the lab before the experiments).

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