TY - GEN
T1 - Differential time-domain spectroscopy technique based on polarization and depolarization current and their applications in oil-paper insulation estimation
AU - Wei, Jian Lin
AU - Xu, Hao
AU - Wang, Jin Feng
AU - Zhang, Guan Jun
PY - 2012
Y1 - 2012
N2 - To quantificationally apply the results of polarization and depolarization currents (PDC) measurement for condition evaluation of oil-paper insulation in power transformer, the differential time-domain spectroscopy (DTDS) theory and the extraction technique of sensitive characteristic parameters are introduced. A set of oil-immersed paper samples are thermally acceleratedly aged at high temperature (∼150°C) in laboratory based on the developed platform for oil-paper insulation thermal aging and dielectric response test. Under different temperatures (30, 40, 50, 60, 70°C) and different aging degrees, PDC tests are performed on one of the samples by real-time tracking during the whole aging period. And at each aging stage, the aided tests, such as moisture content dissolved in oil and degree of polymerization (DP) of cellulose paper are measured. The test and analysis results show that aging condition has evident effect on DTDS curves. With sample aging, the DTDS curve shifts upwards. The extracted characteristic parameter, polarization response time t1 of the interfacial polarization between oil and pressboard, is regular and sensitive to aging condition changing. The influence mechanisms of aging on the time domain dielectric properties are analyzed. The empirical formula representing the relation among temperature, aging condition, and dielectric response in time domain is developed by means of 3-D surface fitting technique, to preliminarily investigate the application method of time-domain dielectric test.
AB - To quantificationally apply the results of polarization and depolarization currents (PDC) measurement for condition evaluation of oil-paper insulation in power transformer, the differential time-domain spectroscopy (DTDS) theory and the extraction technique of sensitive characteristic parameters are introduced. A set of oil-immersed paper samples are thermally acceleratedly aged at high temperature (∼150°C) in laboratory based on the developed platform for oil-paper insulation thermal aging and dielectric response test. Under different temperatures (30, 40, 50, 60, 70°C) and different aging degrees, PDC tests are performed on one of the samples by real-time tracking during the whole aging period. And at each aging stage, the aided tests, such as moisture content dissolved in oil and degree of polymerization (DP) of cellulose paper are measured. The test and analysis results show that aging condition has evident effect on DTDS curves. With sample aging, the DTDS curve shifts upwards. The extracted characteristic parameter, polarization response time t1 of the interfacial polarization between oil and pressboard, is regular and sensitive to aging condition changing. The influence mechanisms of aging on the time domain dielectric properties are analyzed. The empirical formula representing the relation among temperature, aging condition, and dielectric response in time domain is developed by means of 3-D surface fitting technique, to preliminarily investigate the application method of time-domain dielectric test.
KW - DTDS
KW - PDC
KW - aging
KW - application
KW - characteristic parameters
KW - oil-paper insulation
UR - https://www.scopus.com/pages/publications/84869424801
U2 - 10.1109/ICPADM.2012.6318922
DO - 10.1109/ICPADM.2012.6318922
M3 - 会议稿件
AN - SCOPUS:84869424801
SN - 9781467328500
T3 - Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
BT - ICPADM 2012 - 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, Technical Papers
T2 - 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2012
Y2 - 24 July 2012 through 28 July 2012
ER -