Conduction phenomena through gas and insulating solids in HVDC Gas Insulated Substations, and consequences on electric field distribution

Abstract : With the emergence of renewable energy, new technologies for energy distribution across long distances, such as High Voltage Direct Current in Gas Insulated Substations (HVDC GIS) are developed. Under HVDC, the electric field distribution is not anymore determined by permittivity of materials but by resistivities and charge accumulation. In presence of gas/solid interfaces, the role of the surrounding gas on charge accumulation must be considered. In this work, we first present characterization methods which allow measuring the current passing through gas and solid insulators for different environmental conditions. Using these methods, we investigate the influence of several parameters (temperature, electric field, relative humidity) on the measured current. The variations of volume and surface resistivities are obtained. Finally, the results obtained for both solid and gaseous insulations are used to develop a numerical model with a shape close to the industrial application, and observe the modification of electric field distribution in presence of water concentration and temperature gradient in an HVDC GIS.
Document type :
Theses
Complete list of metadatas

Cited literature [103 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/tel-01121096
Contributor : Sylvie Garcia <>
Submitted on : Friday, February 27, 2015 - 1:53:34 PM
Last modification on : Monday, April 9, 2018 - 12:22:24 PM
Long-term archiving on : Thursday, May 28, 2015 - 10:16:35 AM

Identifiers

  • HAL Id : tel-01121096, version 1

Collections

Citation

Laetitia Zavattoni. Conduction phenomena through gas and insulating solids in HVDC Gas Insulated Substations, and consequences on electric field distribution. Electric power. Université de Grenoble, 2014. English. ⟨tel-01121096⟩

Share

Metrics

Record views

422

Files downloads

311