Analysis of alternative parameters of dynamic resistance measurement in high voltage circuit breakers

Autor: Tarso Vilela Ferreira, George Victor Rocha Xavier, A. Oliveira, Herbet Filipe dos Santos Sousa, Edson Guedes da Costa, Henrique Nunes de Santana
Jazyk: angličtina
Rok vydání: 2019
Předmět:
wear
electric arcs
DRM technique
continuous evaluation
Computer science
HVCB ACs
lcsh:QC501-721
Energy Engineering and Power Technology
inevitable degradation processes
electric resistance measurement
mean resistance
Dynamic resistance
Continuous evaluation
Reliability (semiconductor)
electrical contacts
efficient evaluating techniques
arcing contacts
lcsh:Electricity
Electrical and Electronic Engineering
Circuit breaker
main contacts
high-voltage circuit breaker contacts
current interruption capacity
DRM curve
High voltage
static resistance measurement
real wear conditions
Electrical contacts
Reliability engineering
nonstandardised technique
dynamic resistance measurement
operational faults
HVCB contacts
specified parameters
Key (cryptography)
degradation level
lcsh:Electrical engineering. Electronics. Nuclear engineering
circuit breakers
lcsh:TK1-9971
Degradation (telecommunications)
AC degradation
Zdroj: High Voltage (2019)
DOI: 10.1049/hve.2019.0046
Popis: Throughout its lifetime, high-voltage circuit breaker (HVCB) contacts suffer from inevitable degradation processes, especially during the formation of electric arcs. Highly degraded contacts can reduce the current interruption capacity and increase the chances of operational faults, which might lead to considerable financial losses. Therefore, the use of efficient evaluating techniques is a key factor to achieve systems reliability. The dynamic resistance measurement (DRM) is a technique that can be used to evaluate the degradation level of HVCB' contacts. It stands out from the usual technique, static resistance measurement, by allowing the assessment of both the main contacts and the arcing contacts (ACs). Usually, the mean resistance or the area under the DRM curve is used to estimate the AC degradation. However, DRM is a non-standardised technique and there are no specified parameters to evaluate the real wear conditions. Therefore, an analysis of alternative parameters extractible from the DRM technique is presented in this study, such as amplitude and variance of the DRM curve. The results attest the possible use of more than one parameter for the continuous evaluation of HVCB ACs, characterising the DRM as a more complete and precise diagnosis tool.
Databáze: OpenAIRE
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