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JSIR Vol.64(04) [April 2005] >


Title: Assessment of transformer insulation system by evaluating partial discharge and dissolved gas analysis
Authors: Verma, P
Roy, M
Verma, A
Bhanot, Vimal
Keywords: Partial discharge
Scanning electron microscopy
Thermal stress
Electrical stress
Transformer paper
DGA
Issue Date: Apr-2005
Publisher: CSIR
Abstract: Partial Discharge (PD) measurement is carried out on the accelerated aged oil-paper samples in specially designed test cell. The accelerated thermal stress is selected from the temperature range 120 to 160°°C and electric stress 1.0 to 2.5 per unit (pu, 1 pu = 1.0 kV). The test cell is taken out after 15, 30, 45 and 60 d to assess the extent of degradation of transformer insulation by performing PD test. The PD results are correlated with dissolved gas analysis and microstructure analysis of aged paper samples.
Page(s): 262-267
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.64(04) [April 2005]

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