Title :
Characterization of Aging and Degradation of 28kV Polymeric insulators using Electrical Impedance Spectroscopy
Author :
Sundararajan, Raji ; Kannan, A.M. ; Romero, Edwin ; Molina, Ignacio
Author_Institution :
Arizona State Univ., Mesa, AZ
Abstract :
Electrical characterization of materials, including polymers has been performed using electrical impedance spectroscopy. The impedance (Z) spectra gives details about the dielectric dispersion of the resistivity (or conductivity) and the relative permittivity of the material with frequency. This enables one to assess the condition of the material, such as the ripening of fruit, or the aging of polymeric insulators. In this research, Autolab/PGSTAT30 Impedance analyzer was used to assess the aging of 28 kV Thermoplastic elastomeric (TPE) insulators under multistress acid rain conditions. The aged samples showed increased conductance compared to virgin. However, the imaginary Z value (corresponding to the capacitive reactance) of the aged samples were lower than the virgin sample values. The reduction varied for HV and LV samples. The results indicate that impedance spectroscopy can be effectively used to study surface structural modification caused by aging.
Keywords :
ageing; electric impedance imaging; permittivity; polymer insulators; polymers; 28 kV; Autolab/PGSTAT30 Impedance analyzer; aging; capacitive reactance; conductivity; degradation; dielectric dispersion; electrical impedance spectroscopy; multistress acid rain conditions; polymeric insulators; relative permittivity; resistivity; surface structural modification; thermoplastic elastomeric insulators; Aging; Conducting materials; Conductivity; Dielectric materials; Dielectrics and electrical insulation; Electrochemical impedance spectroscopy; Permittivity; Plastic insulation; Polymers; Thermal degradation;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2006 IEEE Conference on
Conference_Location :
Kansas City, MO
Print_ISBN :
1-4244-0547-5
Electronic_ISBN :
1-4244-0547-5
DOI :
10.1109/CEIDP.2006.311969