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Digital Library of the
European Council for Modelling and Simulation |
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Title: |
On The Processing Of The Recorded Data For The SF6 Circuit Breakers
From The Transformation Substation 110/20/6kV Craiova South |
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Authors: |
Maria Brojboiu, Virginia Ivanov, Andrei Savescu |
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Published in:
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(2014).ECMS 2014 Proceedings edited
by: Flaminio Squazzoni,
Fabio Baronio, Claudia Archetti,
Marco Castellani European Council for
Modeling and Simulation. doi:10.7148/2014 ISBN:
978-0-9564944-8-1 28th
European Conference on Modelling and Simulation, Brescia,
Italy, May 27th – 30th,
2014 |
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Citation
format: |
Maria
Brojboiu, Virginia Ivanov,
Andrei Savescu (2014). On The Processing Of The Recorded Data For The SF6 Circuit Breakers
From The Transformation Substation 110/20/6kV Craiova South, ECMS 2014
Proceedings edited by: Flaminio Squazzoni,
Fabio Baronio, Claudia Archetti,
Marco Castellani European Council for Modeling and Simulation. doi:10.7148/2014-0142 |
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DOI: |
http://dx.doi.org/10.7148/2014-0142 |
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Abstract: |
The assurance of the
reliability for the transformation substations is one of primary goals of the
manufacturers and distributors of electricity. Therefore, a proper monitoring
and maintenance program is required. The circuit breaker is a complex device,
subject to the thermal and mechanical stresses during the normal or fault currents
switching. The substations are frequently equipped with SF6 circuit breaker.
The circuit breaker components subjected to the thermal stresses are the main
contacts which suffer electrical erosion and the nozzle
which is subjected to the ablation process. The ablation process appears
because of the energy radiation which is transferred
from the electric arc. As a result of the ablation, the nozzle geometry, the
gas pressure and the electric withstand are changed. Based on the recorded
data from the transformation substation 110/20/6kV Craiova South, the mass
loss from nozzle, the admissible number of disconnections and the throat nozzle
diameter are computed. The graphical representations highlight the impact of
the interrupted current, of the arcing time and of the integral I2t over the
mentioned ones. Consequently, if the switching process and the time arc value
are controlled, the thermal wear can be limited and the equipments users may
provide a maintenance program with minimal costs and an increasing of the
lifetime. |
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