Electrical tree inception characteristics of XLPE insulation under power-frequency voltage and superimposed impulse voltage

Author

Wang, Hongxin ; He, Jingliang ; Zhang, Xiuge ; Li, Zipin ; Li, Luo ; Guan, Genzhi

Author_Institution

Wuhan Univ. of Hydraulic & Electr. Eng., China

Volume

4

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

320

Abstract

This paper deals with treeing inception voltage characteristics of XLPE cable insulation subjected to impulse voltage superimposed on power-frequency voltage. The tree initiation tests were performed on specimens removed from a section of 220 kV transmission cable. The impulse inception strength of an electrical tree was found to be dependent on the pre-applied power-frequency stress and the relative polarity of the superimposed impulse voltage. Besides, it also shows an obviously accumulative effect and tree inception delay. These phenomena are discussed in connection with the space charge effect

Keywords

XLPE insulation; 220 kV; XLPE cable insulation; XLPE insulation; electrical tree inception characteristics; impulse inception strength; impulse voltage; polarity; power-frequency voltage; pre-applied power-frequency stress; space charge effect; superimposed impulse voltage; transmission cable; tree initiation tests;

fLanguage

English

Publisher

iet

Conference_Titel

High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)

Conference_Location

London

ISSN

0537-9989

Print_ISBN

0-85296-719-5

Type

conf

DOI

10.1049/cp:19990857

Filename

821285