Title :
Ageing of polymers studied by spectral analysis of UWB partial discharge signals
Author_Institution :
High Voltage Lab., Delft Univ. of Technol., Netherlands
Abstract :
UWB measurements of partial discharges can be used for an assessment of the deterioration process of dielectrics. It has been shown that the degradation process in voids due to partial discharges (PD) proceeds in three consecutive stages. Test results on samples with artificially introduced voids, as well as tests on complete high voltage components like post insulators are presented to show the applicability of this method. A comparison is made between results obtained by analysis of the time signal and results obtained by analysis of the frequency content of the PD pulses, In real high voltage components the pulse shape of the discharge is distorted due to the bad UWB properties of most components. It is shown that spectral analysis of the PD signal is to be preferred when it comes to the analysis of the progression of ageing of complete high voltage components
Keywords :
ageing; insulation testing; insulator testing; life testing; organic insulating materials; partial discharges; spectral analysis; UWB partial discharge signals; ageing; deterioration process; frequency content; high voltage components; polymers; post insulators; pulse shape; spectral analysis; time signal; voids; Aging; Degradation; Dielectric measurements; Insulator testing; Partial discharges; Polymers; Pulse shaping methods; Signal analysis; Spectral analysis; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1995. Annual Report., Conference on
Conference_Location :
Virginia Beach, VA
Print_ISBN :
0-7803-2931-7
DOI :
10.1109/CEIDP.1995.483615
