Title :
Life estimation of DC insulation systems in the presence of voltage-polarity inversions
Author :
Cavallini, A. ; Fabiani, D. ; Mazzanti, G. ; Montanari, G.C. ; Simoni, L.
Author_Institution :
Dipt. di Ingegneria Elettrica, Bologna Univ., Italy
Abstract :
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
Keywords :
ageing; impulse testing; insulation testing; life testing; polyethylene insulation; power cable insulation; transients; DC insulation systems; DC stress; HVDC transmission cables; Miner´s law; accelerated aging; breakdown time; cable insulation; failure probability; impulse voltages; life estimation; life tests; phenomenological model; polyethylene; remaining life; voltage-polarity inversions; Cables; Dielectrics and electrical insulation; Frequency estimation; Laplace equations; Life estimation; Life testing; Materials testing; Polymers; Stress; Voltage;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845551
