The impact of interfaces and space charge formation on breakdown strength of epoxy resin

Author

Iddrissu, I. ; Rowland, S. ; Tzimas, A.

Author_Institution

Univ. of Manchester, Manchester, UK

fYear

2014

fDate

19-22 Oct. 2014

Firstpage

90

Lastpage

93

Abstract

The re-emergence of HVDC necessitates re-evaluation of dielectric materials. Epoxy resin is employed as a dielectric material for joints and terminations in HV electrical systems up to about 75 kV, and higher ratings are required. Under DC however, space charge accumulation is a problem especially where interfaces are encountered. In this study, epoxy-epoxy laminates were fabricated and tested for space charge formation, using the PEA method, and breakdown strength under AC and DC were investigated. It was found that negative charges are accumulated at the layer interface and the breakdown strength under DC conditions is about 39% and 35% higher than that under AC condition for single and double layer samples respectively.

Keywords

HVDC power transmission; dielectric materials; electric breakdown; electric strength; epoxy insulation; pulsed electroacoustic methods; resins; space charge; HV electrical system; HVDC transmission; Interface Impact; PEA method; dielectric material re-evaluation; double layer sample; epoxy resin breakdown strength; epoxy-epoxy laminate; pulsed electroacoustic technique; space charge accumulation; space charge formation; Anodes; Charge measurement; Electric breakdown; Epoxy resins; Space charge; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2014 IEEE Conference on

Conference_Location

Des Moines, IA

Type

conf

DOI

10.1109/CEIDP.2014.6995911

Filename

6995911