SuperGrid Institute hosts the 11th Quarterly review of NanocompEIM 2

2019-07-26T11:17:28+02:00juillet 25th, 2019|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

Since October 2016, SuperGrid Institute has been involved in the NanocompEIM 2 project. The goal of the project is to develop nanocomposites (Nanocomp) for electrical insulation materials (EIM) in order to reduce CO2 emissions and improve system reliability and availability. Financed at 50% by Innovate UK, a government organisation dedicated to research and innovation in the United Kingdom, the overall budget of the project is around 1M£ (1.1M€).

Comparaison de mesures de conductivité obtenues par spectroscopie diélectrique et mesure de courant sous tension continue sur une résine époxy

2019-07-26T09:40:04+02:00juin 24th, 2019|Appareillage électrique haute tension, Publications, Systèmes de câbles & jonctions HVDC|

De par sa facilité d’utilisation et sa capacité à isoler la permittivité complexe représentant les pertes dans un matériau tout en faisant un balayage fréquentiel, la spectroscopie diélectrique semble être une méthode de choix pour obtenir la valeur de conductivité ohmique d’un matériau. Cette méthode pourrait permettre de s’affranchir des temps conséquents de stabilisation généralement associés aux mesures de conductivité issues de courbes courant-tension effectuées suivant la norme IEC 62631-3. Par l’intermédiaire d’une comparaison entre ces 2 méthodes, les auteurs vont revenir sur les limites de chacune d’entre elle.

SuperGrid Institute involved with the National Congress of Dielectric Spectroscopy

2019-08-08T11:01:20+02:00juin 18th, 2019|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

The national congress of dielectric spectroscopy (SDM2) took place at LyonTech on the 6th and 7th of June at the La Doua academic campus. A number of our materials experts attended to present some of the innovative studies that are under way at SuperGrid Institute.

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

2019-07-26T09:40:22+02:00avril 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

2019-07-26T09:40:42+02:00novembre 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

2019-07-26T09:40:43+02:00octobre 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

2019-07-26T09:40:53+02:00octobre 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 »

2019-07-26T09:41:08+02:00septembre 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.