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Energies 2016, 9(11), 964;

Novel Auto-Reclosing Blocking Method for Combined Overhead-Cable Lines in Power Networks

Department of Electrical Engineering, ETS Ingenieros Industriales, Technical University of Madrid, C/José Gutierrez Abascal, 2, 28006 Madrid, Spain
Department of Electrical Engineering, ETS Ingeniería y Diseño Industrial, Technical University of Madrid, C/Ronda de Valencia, 3, 28012 Madrid, Spain
Author to whom correspondence should be addressed.
Academic Editor: Miguel Castilla
Received: 25 June 2016 / Revised: 18 October 2016 / Accepted: 15 November 2016 / Published: 17 November 2016
(This article belongs to the Special Issue Control and Communication in Distributed Generation Systems)
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This paper presents a novel auto-reclosing blocking method for combined overhead-cable lines in power distribution networks that are solidly or impedance grounded, with distribution transformers in a delta connection in their high-voltage sides. The main contribution of this new technique is that it can detect whether a ground fault has been produced at the overhead line side or at the cable line side, thus improving the performance of the auto-reclosing functionality. This localization technique is based on the measurements and analysis of the argument differences between the load currents in the active conductors of the cable and the currents in the shields at the cable end where the transformers in delta connection are installed, including a wavelet analysis. This technique has been verified through computer simulations and experimental laboratory tests. View Full-Text
Keywords: ground faults; protection; distribution protections; electrical distribution networks ground faults; protection; distribution protections; electrical distribution networks

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Granizo Arrabé, R.; Platero Gaona, C.A.; Álvarez Gómez, F.; Rebollo López, E. Novel Auto-Reclosing Blocking Method for Combined Overhead-Cable Lines in Power Networks. Energies 2016, 9, 964.

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