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Phd Caroline STACKLER « Electronic transformers for railway applications »

2019-02-26T11:49:55+02:00février 26th, 2019|Electronique de puissance & convertisseurs, Phd|

The main objective of this thesis is to develop a methodology to size PETT topologies, in order to compare them.

Overview of DC–DC Converters Dedicated to HVdc Grids

2019-06-10T17:00:45+02:00février 19th, 2019|Architecture & systèmes du supergrid, Electronique de puissance & convertisseurs, Publications|

This paper presents an overview of the dc–dc power converters dedicated to HVdc proposing a classification based on their structure. Two large families are established: those which provide galvanic isolation, and those which do not. Several subfamilies are also proposed. An overview of the main HVdc applications that can be targeted with each family is also presented, highlighting the main converter requirements for each application case.

PhD Amjad MOUHAIDALI « Contribution to the modelling of HVDC cables for electromagnetic transient simulations »

2019-02-13T11:13:54+02:00février 13th, 2019|Architecture & systèmes du supergrid, Phd|

The integration of new technologies in the electric grids made them more and more complex, and most likely future growth of power grids will be based more on underground cables than overhead lines. One problem here, is that the mathematical model for electromagnetic simulation of power cables still has some shortcomings regarding stability, accuracy and passivity. In this thesis, we evaluate the cable parameters using analytical and numerical methods.

PhD Juan-Carlos GONZALEZ « Transient stability of high voltage AC-DC electric transmission systems »

2019-02-11T10:09:23+02:00février 11th, 2019|Architecture & systèmes du supergrid, Phd|

This thesis addresses the transient stability analysis of hybrid AC/DC electric transmission systems. More precisely two questions sought to be investigated: What is the impact of a DC contingency on AC transient stability? How can we take advantage of the DC transmission systems as control inputs in order to enhance AC transient stability?

FMEA of a non-selective fault-clearing strategy for HVDC grids

2019-06-10T16:47:43+02:00février 7th, 2019|Architecture & systèmes du supergrid, Publications|

The Failure Mode Effect Analysis (FMEA) is a technique used to investigate failures in a process or component and to identify the resultant effects of these failures on system operations. In this paper it is explained how the FMEA can be used to define and assess the impact of the failure modes (FM) of a protection strategy for High Voltage Direct Current (HVDC) grids.

Study of the impact of DC-DC converters on the protection strategy of HVDC grids

2019-09-02T14:30:19+02:00février 7th, 2019|Electronique de puissance & convertisseurs, Publications|

This paper studies the role of DC-DC converters in the protection of HVDC grids acting as firewalls to stop the propagation of faults. The effects of blocking the converter or actively controlling its operation during faults are presented.The results demonstrate the capabilities of DC-DC converters beyond DC voltage transformation.