The reliability of epoxy resins (and dielectrics in general) employed for HVDC applications is significantly affected by space charge accumulation in the insulating material. Several methods have been tested to limit the injection and accumulation of space charge. In this work, planar specimens featuring graphene coatings were tested. Measurements of space charge accumulation, conductivity and permittivity at different temperatures (from 30°C to 60°C) and fields (from 30 kV/mm to 50 kV/mm) were carried out on epoxy specimens with and without coatings. Results show accumulation of space charge for low fields and temperatures in the reference specimens, while a reduction can be noticed with a layer of graphene coating. On the other hand, at higher fields or temperatures, the effect is reversed.

Seri P., Suraci S.V., Fabiani D. (2021). Effects of Graphene Coatings on hindering Space Charge injection in Epoxy Resin. Institute of Electrical and Electronics Engineers Inc. [10.1109/ICPADM49635.2021.9493969].

Effects of Graphene Coatings on hindering Space Charge injection in Epoxy Resin

Seri P.;Suraci S. V.;Fabiani D.
2021

Abstract

The reliability of epoxy resins (and dielectrics in general) employed for HVDC applications is significantly affected by space charge accumulation in the insulating material. Several methods have been tested to limit the injection and accumulation of space charge. In this work, planar specimens featuring graphene coatings were tested. Measurements of space charge accumulation, conductivity and permittivity at different temperatures (from 30°C to 60°C) and fields (from 30 kV/mm to 50 kV/mm) were carried out on epoxy specimens with and without coatings. Results show accumulation of space charge for low fields and temperatures in the reference specimens, while a reduction can be noticed with a layer of graphene coating. On the other hand, at higher fields or temperatures, the effect is reversed.
2021
Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
163
166
Seri P., Suraci S.V., Fabiani D. (2021). Effects of Graphene Coatings on hindering Space Charge injection in Epoxy Resin. Institute of Electrical and Electronics Engineers Inc. [10.1109/ICPADM49635.2021.9493969].
Seri P.; Suraci S.V.; Fabiani D.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/845870
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