78455 - PREDICTIVE MAINTENANCE FOR ELECTRICAL INFRASTRUCTURES M

Scheda insegnamento

  • Docente Andrea Cavallini

  • Crediti formativi 6

  • SSD ING-IND/33

  • Modalità didattica Convenzionale - Lezioni in presenza

  • Lingua di insegnamento Inglese

Anno Accademico 2018/2019

Conoscenze e abilità da conseguire

At the end of the course, students are able to choose the most appropriate diagnostic techniques for a specific apparatus, and are able to start using the techniques by themselves, interpreting measurement results. Their expertise is based on the knowledge that they acquire on (a) the typical failure modes of high and medium voltage equipment; (b) the diagnostic techniques most commonly used to identify local defects (weak points in the insulation systems) and bulk degradation; emphasis will be given to the physical basis of these techniques and their limitations; (c) the basic information regarding the use of artificial intelligence techniques in diagnosis and (d) the qualification of insulation systems as a prerequisite to ensure proper reliability levels.

Contenuti

  1. Uso della spettroscopia dielettrica per la diagnostica.
  2. Uso della logica fuzzy per l'identificazione delle sorgenti di scariche parziali.
  3. Structure of power cables insulation systems. Typical failure modes of medium and high voltage power cables. Water trees. Diagnostic through tan-delta measurements. Partial discharge detection and monitoring strategies.
  4. Low voltage and medium voltage rotating machine insulation systems: insulating materials and processing technologies. Other parts of the insulation system: corona-protection tapes, stress control systems, bracing systems. Aging and degradation of the electrical insulation system. Diagnostic of rotating machines based on bulk techniques. Partial discharge detection and analysis of medium voltage machines. Issues in inverter-fed rotating machines.
  5. Transformer insulation system. Thermal aging of the insulation system. Bulk detection of thermal degradation and moisture absorption. Dissolved gas analysis. Partial discharge detection in power transformers. Health index.
  6. Environmental issues of insulation systems: selection of materials and manufacturing issues, end-of-life processing.

 

Testi/Bibliografia

Notes and technical brochures will be provided by the teacher.

Metodi didattici

Conventional lessons in the classroom and practical experiences in the lab.

Modalità di verifica dell'apprendimento

Oral exam

Orario di ricevimento

Consulta il sito web di Andrea Cavallini