Cerca nel sito per parola chiave

pubblicazioni - Articolo

Composite insulators diagnostic in Italian HV transmission. Laboratory and on-site activities for the definition of effective and safe criteria for the location of damages

pubblicazioni - Articolo

Composite insulators diagnostic in Italian HV transmission. Laboratory and on-site activities for the definition of effective and safe criteria for the location of damages

system. Laboratory and on-site activities for the definition of effective and safe criteria for the location of damages. Claudio Valagussa*, Ugo Leva, Michele De Nigris*, Giorgio De Donà** Giuseppe La Vecchia**, Paolo Guzzini** ICOLIM 2008-9th International Conference on Live Maintenance Torun, Polonia 4-6 Giugno 2008 *CESI RICERCA **TERNA SpA The installation of a considerable amount of composite insulators is in progress since the early ’90s also in the Italian electrical transmission system. In the last years TERNA, with the support of CESI RICERCA, has carried out an extensive on-site activity, supported by laboratory research, with the purpose to identify effective and safe methods and techniques to assess their conditions, identify and locate defects. The first step of the investigation has been to analyse the different available diagnostic methods and to select the most appropriate ones; laboratory tests were subsequently carried out to assess the sensitivity of diagnostic indicators to different types of defects. The results of this activity allowed the definition of effective diagnostic sequences which were validated in the labs and on-site. Diagnostic measurements were carried out by experienced personnel from the ground, and by skilled personnel authorized to perform LLW works from the tower. Some insulators were removed from site and tested in laboratory, in order to quantify the possible loss of electromechanical characteristics and evaluate the correlation between diagnostic indicators and insulators’ conditions. Special attention was paid to the identification of the criteria, complying with the prescriptions of the Italian law, to be adopted to check the existence of the safety conditions during live line diagnostic assessments

Progetti

Commenti