The results of space charge measurements carried out on specimens cut from high-voltage XLPE cables are discussed in this paper. The specimens were aged in laboratory under electrical, thermal and thermoelectrical stresses, for various times, with the purpose of searching for diagnostic indicators derived from space charge data. It is shown that two quantities extracted from space charge measurements, that is, the threshold for space charge accumulation and the apparent, trap-controlled, mobility display a good correlation with aging time and stress, thus providing interesting markers for aging diagnosis and life estimation. Aging models are proposed correlating markers with aging time.
Diagnostic markers for ac power cable insulation aging based on space charge measurements / Montanari G.C.; Fabiani D.; Melloni M.; Palmieri F.. - In: CONFERENCE RECORD OF IEEE INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATION. - ISSN 0164-2006. - STAMPA. - (2002), pp. 464-467. (Intervento presentato al convegno 2002 IEEE International Symposium on Electrical Insulation tenutosi a Boston, MA, usa nel 2002).
Diagnostic markers for ac power cable insulation aging based on space charge measurements
Montanari G. C.;Fabiani D.;Palmieri F.
2002
Abstract
The results of space charge measurements carried out on specimens cut from high-voltage XLPE cables are discussed in this paper. The specimens were aged in laboratory under electrical, thermal and thermoelectrical stresses, for various times, with the purpose of searching for diagnostic indicators derived from space charge data. It is shown that two quantities extracted from space charge measurements, that is, the threshold for space charge accumulation and the apparent, trap-controlled, mobility display a good correlation with aging time and stress, thus providing interesting markers for aging diagnosis and life estimation. Aging models are proposed correlating markers with aging time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
