Abstract
This paper presents the technical and economic studies performed by CEMIG, Companhia Energetica de Minas Gerais, Brazil, concerning the use of closing resistor in its extra-high voltage (EHV) breakers. The analysis emphasizes the advantages which could be achieved with the elimination of the resistor as far as costs and reliability are concerned. This evaluation was motivated by two 500 kV breaker failures resulting from the breakdown of the closing resistor operation mechanism. These occurrences resulted in operative restriction for CEMIG EHV system. The analysis demanded a review of the capability criteria of silicon carbide (Si C) gap arresters, which are still greatly used in CEMIG EHV System, and of the procedures to be applied when carrying out the transient studies. The investigation resulted in the prompt removal of closing resistors from circuit breakers in CEMIG extra-high voltage system generating an economy of approximately U$ 840,00 and an improvement in safety and system reliability. (author) 13 refs., 4 figs., 1 tab.
Rocha, Angelica C.O.;
Pinto, Roberto del Giudice R.;
Teixeira, Jose Cleber;
Fonseca, Rodrigo Assuncao;
F, Junior, Sebastiao V
[1]
- Companhia Energetica de Minas Gerais (CEMIG), Belo Horizonte, MG (Brazil)
Citation Formats
Rocha, Angelica C.O., Pinto, Roberto del Giudice R., Teixeira, Jose Cleber, Fonseca, Rodrigo Assuncao, and F, Junior, Sebastiao V.
Technical-economic evaluation of the utilization of closing resistor in CEMIG extra-high voltage circuit breakers.
Brazil: N. p.,
1994.
Web.
Rocha, Angelica C.O., Pinto, Roberto del Giudice R., Teixeira, Jose Cleber, Fonseca, Rodrigo Assuncao, & F, Junior, Sebastiao V.
Technical-economic evaluation of the utilization of closing resistor in CEMIG extra-high voltage circuit breakers.
Brazil.
Rocha, Angelica C.O., Pinto, Roberto del Giudice R., Teixeira, Jose Cleber, Fonseca, Rodrigo Assuncao, and F, Junior, Sebastiao V.
1994.
"Technical-economic evaluation of the utilization of closing resistor in CEMIG extra-high voltage circuit breakers."
Brazil.
@misc{etde_659481,
title = {Technical-economic evaluation of the utilization of closing resistor in CEMIG extra-high voltage circuit breakers}
author = {Rocha, Angelica C.O., Pinto, Roberto del Giudice R., Teixeira, Jose Cleber, Fonseca, Rodrigo Assuncao, and F, Junior, Sebastiao V}
abstractNote = {This paper presents the technical and economic studies performed by CEMIG, Companhia Energetica de Minas Gerais, Brazil, concerning the use of closing resistor in its extra-high voltage (EHV) breakers. The analysis emphasizes the advantages which could be achieved with the elimination of the resistor as far as costs and reliability are concerned. This evaluation was motivated by two 500 kV breaker failures resulting from the breakdown of the closing resistor operation mechanism. These occurrences resulted in operative restriction for CEMIG EHV system. The analysis demanded a review of the capability criteria of silicon carbide (Si C) gap arresters, which are still greatly used in CEMIG EHV System, and of the procedures to be applied when carrying out the transient studies. The investigation resulted in the prompt removal of closing resistors from circuit breakers in CEMIG extra-high voltage system generating an economy of approximately U$ 840,00 and an improvement in safety and system reliability. (author) 13 refs., 4 figs., 1 tab.}
place = {Brazil}
year = {1994}
month = {Dec}
}
title = {Technical-economic evaluation of the utilization of closing resistor in CEMIG extra-high voltage circuit breakers}
author = {Rocha, Angelica C.O., Pinto, Roberto del Giudice R., Teixeira, Jose Cleber, Fonseca, Rodrigo Assuncao, and F, Junior, Sebastiao V}
abstractNote = {This paper presents the technical and economic studies performed by CEMIG, Companhia Energetica de Minas Gerais, Brazil, concerning the use of closing resistor in its extra-high voltage (EHV) breakers. The analysis emphasizes the advantages which could be achieved with the elimination of the resistor as far as costs and reliability are concerned. This evaluation was motivated by two 500 kV breaker failures resulting from the breakdown of the closing resistor operation mechanism. These occurrences resulted in operative restriction for CEMIG EHV system. The analysis demanded a review of the capability criteria of silicon carbide (Si C) gap arresters, which are still greatly used in CEMIG EHV System, and of the procedures to be applied when carrying out the transient studies. The investigation resulted in the prompt removal of closing resistors from circuit breakers in CEMIG extra-high voltage system generating an economy of approximately U$ 840,00 and an improvement in safety and system reliability. (author) 13 refs., 4 figs., 1 tab.}
place = {Brazil}
year = {1994}
month = {Dec}
}