PhD Loriane DESMARS « Study of electrical and thermal properties of epoxy-anhydride composite materials for high voltage insulation »

2019-04-12T10:42:28+00:00avril 2nd, 2019|Appareillage électrique haute tension, Phd, Systèmes de câbles & jonctions HVDC|

The work presented in this manuscript has been motivated by the necessity to develop more efficient electrical insulating materials compared to commercially available ones. An epoxy-anhydride matrix filled with micron sized alumina, often used to produce GIS solid insulators, has been used as a reference for this study.

Study of Turn-to-Turn Electrical Breakdown for Superconducting Fault Current Limiter Applications

2018-11-09T14:59:14+00:00novembre 2nd, 2018|Appareillage électrique haute tension, Publications|

The rational insulation design of a resistive superconducting fault current limiter (r-SCFCL) requires data gathered from experimental setups representative of the final apparatus. Therefore, an experimental study was performed to characterize the electrical breakdown (BD) of liquid nitrogen (LN2) in the peculiar conditions of a quenching superconducting device.

Arc appearance and cathode spot distribution in a long gap high-current vacuum arc controlled by an external axial magnetic field

2018-11-15T16:33:23+00:00octobre 31st, 2018|Appareillage électrique haute tension, Publications|

An experimental study of a high-current vacuum arc (VA) generated between two static CuCr25 contacts spaced 20 or 30 mm apart was conducted to characterize the arc appearance and the cathode spot (CS) distribution.

Electrical properties of epoxy systems based on ionic liquids

2018-11-12T09:50:54+00:00octobre 12th, 2018|Appareillage électrique haute tension, Publications|

In accordance with their interesting properties, ionic liquids (ILs) have attracted in the recent years a great interest in the material field. Recently, few authors have demonstrated the reactivity of ionic liquids towards epoxy in order to form new epoxy-based networks...

PhD Etienne OUSS « Characterization of Partial Discharges and Defect Identification in High-Voltage Direct Current GIS »

2018-11-12T09:51:01+00:00septembre 25th, 2018|Appareillage électrique haute tension, Phd, Tout|

This thesis aimed to characterize partial discharges in DC gas-insulated substations, and to develop an automatic defect identification tool. The first step of this work was the development of a partial discharge measuring bench. The complete study has been performed in a GIS section, so that the results can be directly applied to industrial equipment.

Models of AC and DC cable systems for technical and economic evaluation of offshore wind farm connection

2019-01-10T10:06:54+00:00septembre 3rd, 2018|Appareillage électrique haute tension, Publications, Systèmes de câbles & jonctions HVDC|

Accurate cable modeling is a recurrent issue for electric architecture evaluation and design, especially in specific contexts, like offshore wind farms. This paper proposes optimal analytical cable models for the technical and economic assessment of offshore wind generation systems.

Space Charge Measurements for HVDC GIS Spacer using the Thermal Step Method

2018-11-12T09:51:09+00:00août 31st, 2018|Appareillage électrique haute tension, Publications|

High voltage direct current (HVDC) technologies are currently emerging to develop new energy transmission networks able to integrate renewable energy sources with remote locations from consumers. Gas Insulated Substations (GIS) have been widely used in alternating current (AC) transmission due to their low footprint and high reliability.

Uncertainty Quantification for the Eulerian-Lagrangian simulation of evaporating sprays

2018-11-12T10:09:15+00:00juillet 26th, 2018|Appareillage électrique haute tension, Publications|

Evaporating sprays can be almost routinely simulated using an Eulerian-Lagrangian approach which relies on a RANS modeling of the continuous phase and a Lagrangian description of the discrete phase, including a turbulent dispersion model to express the effect of turbulent fluctuations within the carrier phase on the spray particles and an evaporation model for the spray droplets.

An injection molding press for our Chemistry & Materials test platform

2018-11-12T10:09:14+00:00juillet 13th, 2018|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

With a new semi-automatic injection mixer and an injection molding press, the material characterization and the processing of our samples will take less time – close to industrial production thanks to the Automatic Pressure Gelation (APG) method.