Lundgaard L E, Hansen W, Linhjell D, et al. Aging of oil-impregnated paper in power transformers[J]. IEEE Transactions on Power Delivery, 2004, 19(1): 230- 239.
[2]
Wang M, Vandermaar A J, Srivastava K D. Review of condition assessment of power transformers in service [J]. IEEE Electrical Insulation Magazine, 2002, 18(6): 12-25.
Wang Shiqiang, Wei Jianlin, Yang Shuangsuo, et al. Frequency domain dielectric spectroscopy charac- teristics of oil-paper insulation under accelerated thermal aging[J]. Proceedings of the CSEE, 2010, 30(34): 125-131.
[5]
Du Y, Zahn M, Lesieutre B C, et al. Moisture equilibrium in transformer paper-oil systems[J]. IEEE Electrical Insulation Magazine. 1999, 15(1): 11-20.
[6]
Ekanayake C, Gubanski S M, Graczkowski A, et al. Frequency response of oil impregnated pressboard and paper samples for estimating moisture in transformer insulation[J]. IEEE Transactions on Power Delivery, 2006, 21(3): 1309-1317.
[7]
Saha T K, Purkait P. Investigation of polarization and depolarization current measurements for the assessment of oil-paper insulation of aged transformers[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(1): 144-154.
[8]
Farahani M, Borsi H, Gockenbach E. Dielectric response studies on insulating system of high voltage rotating machines[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2006, 13(2): 383-393.
Wei Jianlin, Wang Shiqiang, Peng Huadong, et al. Investigation of dielectric response characteristics of transformer oil-paper insulation dielectric spectroscopy of acceleratedly of thermal aging[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 56-62.
Liao Ruijin, Hao Jian, Yang Lijun, et al. Simulation and experimental study on frequency-domain dielectric spectroscopy of oil-paper insulation for transformers [J]. Proceedings of the CSEE, 2010, 30(22): 113-119.
Gubanski S M, Boss P, Csepes G, et al. Dielectric response methods for diagnostics of power transformers [J]. IEEE Electrical Insulation Magazine, 2003, 19(3): 12-18.
[15]
Alwis K G N C, Burgoyne C J. Time-temperature superposition to determine the stress-rupture of aramid fibres[J]. Applied Composite Materials, 2006, 13(4): 249-264.
[16]
Zhou Lijun, Tang Hao, Wu Guangning, et al. Equili- brium moisture distribution in oil-paper insulation[J]. High Voltage Engineering, 2007, 33(8): 27-30.
Liao Ruijin, Sun Huigang, Yin Jianguo, et al. Influence on the thermal aging rate and thermal aging charac- teristics caused by water content of oil-paper insulation [J]. Transactions of China Electrotechnical Society, 2012, 27(5): 34-42.
Wang Wei, Ma Zhiqing, Li Chengrong, et al. Impact of cellulose aging on moisture equilibrium of oil- pressboard insulation[J]. Proceedings of the CSEE, 2012, 32(31): 100-105.
[22]
Saha T K, Yao Z T. Experience with return voltage measurements for assessing insulation conditions in service-aged transformers[J]. IEEE Transactions on Power Delivery, 2003, 18(1): 128-135.
[23]
Saha T K, Purkait P. Effects of temperature on time- domain dielectric diagnostics of transformers[J]. Australian Journal of Electrical and Electronics Enginee- ring, 2004, 1(3): 157-162.
[24]
Zaengl W S. Dielectric spectroscopy in time and frequency domain for HV power equipment. I. Theore- tical considerations[J]. IEEE Electrical Insulation Magazine, 2003, 19(5): 5-19.
[25]
Wang Shiqiang, Wei Jianlin, Zhang Guanjun, et al. Effect of temperature on dielectric response charac- teristics of oil impregnated pressboard[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 50-55.
[26]
Saha T K, Purkait P. Investigations of temperature effects on the dielectric response measurements of transformer oil-paper insulation system[J]. IEEE Transactions on Power Delivery, 2008, 23(1): 252-260.
[27]
Zaengl W S. Applications of dielectric spectroscopy in time and frequency domain for HV power equipment [J]. IEEE Electrical Insulation Magazine, 2003, 19(6): 9-22.
Aradhana R, Sridhar S, Papneja G S, et al. Moisture and dielectric properties analysis of power transformer by DIRANA measurement[J]. Water and Energy International, 2010, 67(1): 333-344.
[30]
Jonscher A K. Dielectric relaxation in solids[M]. London: Chelsea Dielectrics Press, 1983.
Liao Ruijin, Hao Jian, Yang Lijun, et al. Relationship between frequency domain characteristic quantity and aging status of transformer oil-paper insulation[J]. Transactions of China Electrotechnical Society, 2012, 27(5): 44-49.
Yang Lijun, Qi Chaoliang, Hao Jian, et al. Frequency- domain dielectric characteristic parameter and moisture content assessment methods study on frequency-domain dielectric spectroscopy of oil-paper insulation for transformers[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 59-66.