Influence of cavity size and cavity location on partial discharge frequency dependence [polymer insulation]

Author

Forssén, C. ; Edin, H.

Author_Institution

Dept. of Electr. Eng., R. Inst. of Technol., Stockholm, Sweden

fYear

2004

fDate

17-20 Oct. 2004

Firstpage

438

Lastpage

441

Abstract

Variable frequency phase resolved partial discharge analysis (VF-PRPDA) is a partial discharge measurement technique where the frequency of the applied voltage is variable. In this paper, the VF-PRPDA technique is applied to a test object containing a cylindrical cavity in an otherwise homogeneous insulation of polycarbonate. The frequency is varied in the range 10 mHz-100 Hz. It is shown how the frequency dependence of PD is influenced by the cavity diameter and the cavity location in relation to the electrodes. The PD frequency dependence is also numerically modeled for an isolated cylindrical cavity with diameter 1.5 mm using a field model.

Keywords

organic insulating materials; partial discharge measurement; voids (solid); 1.5 mm; 10 mHz to 100 Hz; VF-PRPDA; cavity diameter; cavity location; cavity size; cylindrical cavity; homogeneous polycarbonate insulation; partial discharge frequency dependence; partial discharge measurement technique; variable frequency applied voltage; variable frequency phase resolved partial discharge analysis; Conductivity; Electrodes; Frequency dependence; Frequency measurement; Insulation testing; Partial discharge measurement; Partial discharges; Permittivity measurement; Power measurement; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on

Print_ISBN

0-7803-8584-5

Type

conf

DOI

10.1109/CEIDP.2004.1364281

Filename

1364281