An experimental technique to study space charge injection in polymeric materials under AC voltage

Author

Hadid, A. ; Laurent, C.

Author_Institution

Lab. de Genie Electr., Univ. Paul Sabatier, Toulouse, France

Volume

27

Issue

6

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

1095

Lastpage

1100

Abstract

An experimental technique for detecting space charge injection in polymeric material under divergent AC field is described. The automated charge detector can be used for studying charge injection as a function of voltage and time in the 0.001-0.01-pC range. Charge injection is a strong effect above a critical voltage V_c. For a moderate overvoltage, three different phases can be distinguished in the evolution of the dielectric properties: (1) a discharge-free regime, in which low-frequency space charge injection occurs; (2) a transition regime, with high-frequency discharge-like pulses superimposed on the charge injection signal; and (3) an electrical tree propagation regime

Keywords

electric breakdown of solids; organic insulating materials; polymers; AC voltage; automated charge detector; critical voltage; discharge-free regime; divergent AC field; electrical tree propagation regime; experimental technique; high-frequency discharge-like pulses; low-frequency space charge injection; moderate overvoltage; polymeric materials; space charge injection; transition regime; Aging; Charge measurement; Current measurement; Dielectrics; Electrodes; Needles; Partial discharges; Polymers; Space charge; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.204859

Filename

204859