Partial Discharge Behavior of Protrusion on High Voltage Conductor in GIS/GIL under High Voltage Direct Current: Comparison of SF6 and SF6 Alternative Gases

2021-08-11T16:42:36+02:00February 28th, 2020|Appareillage électrique haute tension, Publications|

Recent studies have demonstrated that fluoronitrile (FN) NovecTM 4710 and fluoroketone (FK) NovecTM 5110 show higher dielectric strength than SF6. These gases can be mixed with a buffer gas such as CO2 and technical air to have suitable dielectric properties for high voltage insulation applications.

Phd Paolo ERRANTE “Liquid Spray Injection inside the expansion volume of a CO2 High Voltage Circuit Breaker”

2021-08-11T17:41:53+02:00February 5th, 2020|Appareillage électrique haute tension, Phd|

In the framework of the research activities of the High Voltage Substation Equipment program of SuperGrid, it has been proposed to introduce such species by means of an evaporative liquid spray. The interaction between injected droplets and the mixture of hot gases successively flowing into the chamber and vented outside the chamber during the mechanical separation of the electric contacts should allow spray evaporation and transport of the modified gas mixture towards the arc region.

Phd Thibaut LEFORT “Epoxy/ionic liquid networks with and without anhydride: study of polymerization mechanisms and dielectric properties”

2021-08-11T17:42:12+02:00December 12th, 2019|Appareillage électrique haute tension, Phd|

Thursday 12/12/2019, Thibaut Lefort has obtained the title of Doctor of Materials of Lyon university after a high quality viva. Hence, the thesis jury has strongly encouraged him to candidate for a Ph.D award granted by INSA in the energy category.

Design and validation tests of 320kV HVDC GIL/GIS

2021-08-11T16:42:46+02:00November 21st, 2019|Appareillage électrique haute tension, Publications|

This paper gives an overview of electrical DC phenomena in GIL/GIS, the influence of insulating properties of SF6 and filled epoxy resin, and design of new support insulator for 320kV HVDC GIL/GIS. The busbar system including the insulator was designed not only to satisfy all standard requirements such as mechanical, temperature rise, heating cycle performance but also particular requirements for HVDC applications such as superimposed impulse tests. Finally and for the first time at actual scale, type test according to CIGRE JWG D1/B3.57 was conducted in EDF R&D Les Renardières laboratory to verify the design and insulating performance of the 320kV HVDC GIL/GIS system. The satisfactory results allow to confirm the high technology readiness level of HVDC GIL/GIS.

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