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

2023-01-31T13:28:25+01:00June 24th, 2019|Appareillage électrique haute tension, Publications, Systèmes de câbles haute tension|

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.

HVDC dielectric material comparison from cable characterizations as a mean for material selection

2023-01-31T13:27:17+01:00June 24th, 2019|Publications, Systèmes de câbles haute tension|

The present paper aims at describing the measurement methods applied to mock-up cables in order to evaluate their dielectrics. The focus is on leakage current and temperature measurements together with the processing based upon them to assist in the selection of the more appropriate material.

HVDC dielectric material comparison from cable characterizations as a mean for material selection

2021-08-11T16:54:04+02:00June 24th, 2019|Publications, Systèmes de câbles haute tension|

The present paper aims at describing the measurement methods applied to mock-up cables in order to evaluate their dielectrics. The focus is on leakage current and temperature measurements together with the processing based upon them to assist in the selection of the more appropriate material.

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

2021-08-11T16:58:23+02:00September 3rd, 2018|Appareillage électrique haute tension, Publications, Systèmes de câbles haute tension|

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.

Discharging micro cavities and electric field enhancement due to cavities in HVDC XLPE cables

2021-08-11T16:59:00+02:00August 31st, 2018|Publications, Systèmes de câbles haute tension|

This paper presents simulation and calculation results of electric field enhancement due to various cavity shapes carried out on polymeric high voltage direct current (HVDC) cables. Two aspects are considered: partial discharges (PD) in microcavities and field enhancement factor under DC.

Discharging micro cavities and electric field enhancement due to cavities in HVDC XLPE cables

2018-09-17T10:48:49+02:00August 31st, 2018|Publications, Systèmes de câbles haute tension|

This paper presents simulation and calculation results of electric field enhancement due to various cavity shapes carried out on polymeric high voltage direct current (HVDC) cables. Two aspects are considered: partial discharges (PD) in microcavities and field enhancement factor under DC.

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