TY - JOUR
T1 - Evaluation of Partial Discharge Signatures Using Inductive Coupling at On-Site Measuring for Instrument Transformers
AU - Aguiar do Nascimento, Douglas
AU - Iano, Yuzo
AU - Loschi, Hermes José
AU - De Sousa Ferreira, Luiz Antonio
AU - Rossi, José Antônio Donizete
AU - Duarte Pessoa, Clayton
PY - 2018/1/18
Y1 - 2018/1/18
N2 - This paper describes the use of conventional and unconventional partial discharge tests by capacitive and inductive coupling in Instrument Transformers (IT). The objective of this work was to evaluate Phase-Resolveld Partial Discharge (PRPD) signatures features obtained during on-site (online) and laboratory (offline) measurements, by comparing results with state-of-the-art patterns and standard recommendations. The analysis of the results showed that is possible to obtain partial discharge (PD) patterns - corona, background noise, internal PD, free potential and surface PD - at on-site measurements but those are compromised by the pulse attenuation, difficulties in performing measuring system calibration and the absence of reference voltage. Suitable range of on-site measuring was above 1 MHz up to 5 MHz. The results reached in on-site measuring can be used as image preprocessing methodology to perform automatic pattern recognition of partial discharge signature. It is also described the parameterization of the HFCT for different frequency filter values though carrying out HFCT parameterization for different types of high voltage equipment was not objective of this work.
AB - This paper describes the use of conventional and unconventional partial discharge tests by capacitive and inductive coupling in Instrument Transformers (IT). The objective of this work was to evaluate Phase-Resolveld Partial Discharge (PRPD) signatures features obtained during on-site (online) and laboratory (offline) measurements, by comparing results with state-of-the-art patterns and standard recommendations. The analysis of the results showed that is possible to obtain partial discharge (PD) patterns - corona, background noise, internal PD, free potential and surface PD - at on-site measurements but those are compromised by the pulse attenuation, difficulties in performing measuring system calibration and the absence of reference voltage. Suitable range of on-site measuring was above 1 MHz up to 5 MHz. The results reached in on-site measuring can be used as image preprocessing methodology to perform automatic pattern recognition of partial discharge signature. It is also described the parameterization of the HFCT for different frequency filter values though carrying out HFCT parameterization for different types of high voltage equipment was not objective of this work.
KW - Epoxy resin insulation
KW - Instrument transformers
KW - Oil insulation
KW - Partial discharges
KW - PRPD
UR - http://www.scopus.com/inward/record.url?scp=85040964560&partnerID=8YFLogxK
U2 - 10.1515/ijeeps-2017-0160
DO - 10.1515/ijeeps-2017-0160
M3 - Article
AN - SCOPUS:85040964560
JO - International Journal of Emerging Electric Power Systems
JF - International Journal of Emerging Electric Power Systems
SN - 1553-779X
M1 - 20170160
ER -