论文信息 - Life estimation of DC insulation systems in the presence of voltage-polarity inversions

Life estimation of DC insulation systems in the presence of voltage-polarity inversions

A phenomenological model to estimate life of insulation systems subjected to DC stress with or without polarity inversions is presented. The model is obtained applying Miner's law to life deriving from the decomposition of the supply stress in a DC voltage plus impulse voltages. The latter accounts for accelerated aging due to inversion. The model is validated resorting to life tests with and without inversions, carried out on polyethylene materials for cable application.

Davide Fabiani | Gian Carlo Montanari | Giovanni Mazzanti | Anna Cavallini | L. Simoni

[1] A. Greenwood,et al. Advanced power cable technology , 1983 .

[2] Gian Carlo Montanari,et al. Endurance characteristics of XLPE compounds under DC voltage , 1998, ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132).

[3] Gian Carlo Montanari,et al. The incorporation of space charge degradation in the life model for electrical insulating materials , 1995 .

[4] Jacques Lewiner,et al. Evidence of strong correlation between space-charge buildup and breakdown in cable insulation , 1996 .

[5] Davide Fabiani,et al. Investigation of DC threshold of polyethylenes as a tool for insulation characterization , 1999, 1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319).

[6] Tatsuo Takada. Acoustic and optical methods for measuring electric charge distributions in dielectrics , 1999 .