Substations SF6 circuit breakers: Reliability evaluation based on equipment condition

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Vianna, EAL (Author) Other; Abaide, AR (Author) Other; Canha, LN (Author) Other; Vladimiro Miranda (Author) FEUP

Journal

Title: Electric Power Systems Research

Vol. 142

Pages: 36-46

ISSN: 0378-7796

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 25 Citations

Other information

Authenticus ID: P-00K-XJ6

DOI: 10.1016/j.epsr.2016.08.018

Abstract (EN): This paper presents a new methodology to define a priority scale for maintenance actions in substations, based on the development of a Composite Risk Index (CRI) associated with each device. Two auxiliary indices are built: Basic Condition (BC) and Operating Condition (OC), representing the physical and functional characteristics of the equipment that can compromise their performance and contribute to the occurrence of failures. Their evaluation is helped by a Technical Capacity Index (TCI), which evaluates how much the equipment has been affected by wear and tear, in the assessment of the Basic Condition, and the classification of the equipment defects by degrees of severity, in the assessment of the Operating Condition. Two cascading Fuzzy Inference Systems of the Mandani type are used, the first in defining the BC, and the second to obtain the equipment CRI denoting maintenance priority, which may then be used in planning maintenance actions. The methodology is verified through an SF6 circuit breaker CRI assessment, and its priority scale for maintenance planning. The method for evaluating the SF6 circuit breakers reliability is validated through a comparison with a statistical approach, using real data collected from equipment installed in Eletrobras Eletronorte Transmission System, in Rondonia, Amazon region of Brazil. (C) 2016 Published by Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11