EXPERIMENTAL INVESTIGATION OF FERRORESONANCE AND MITIGATION MEASURES IN 35 KV ISOLATED NETWORKS

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CIRED 2019 - 1619.pdf (996.26 KB)

Paper number

1619

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Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Muftić Dedović, Maja, University of Sarajevo- Faculty of Electrical Engineering, Bosnia and Herzegovina
Mujezinović, Adnan, University of Sarajevo Faculty of Electrical Engineering , Bosnia and Herzegovina
Turković, Nedim, EPC Elektroprivreda of Bosnia and Herzegovina , Bosnia and Herzegovina
Dautbašić, Nedis, University of Sarajevo Faculty of Electrical Engineering, Bosnia and Herzegovina
Turković, Irfan, University of Sarajevo Faculty of Electrical Engineering , Bosnia and Herzegovina
Tokić, Amir, University of Tuzla Faculty of Electrical Engineering, Bosnia and Herzegovina
Bajramović, Zijad, University of Sarajevo Faculty of Electrical Engineering , Bosnia and Herzegovina

Abstract

Ferroresonance is a nonlinear dynamic phenomenon that appears in the electric power system between a non-linear inductances and system capacities excited by a sinusoidal voltage source. The most common non-linear elements of the electric power system are the iron core inductances of power and measuring transformers, reactors, etc. in which saturation of non-linear elements can occur. As a consequence of ferroresonance there may be a significant increase in the voltage value and under the certain conditions an excessive increase of the current value across the transformer terminals. This phenomenon can lead to damage of the measuring transformers and other equipment used in the network. Ferroresonance is one of the most common low-frequency electromagnetic transient phenomena that appear in the isolated power networks. Therefore, special attention must be on analyzing the probability of ferroresonance occurrence in electric power systems. In this paper, ferroresonance measurement results will be given. The waveform of the phase to ground voltage and wave form of the open delta voltage is obtained. Also, the Fourier transformation is performed on these signals. Proposed measurements are conducted in the real 35 kV distribution network with isolated neutral point. Also, efficiency of some experimentally tested mitigation measure will be presented within this paper.

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Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/489
http://dx.doi.org/10.34890/719

ISSN

2032-9644

ISBN

978-2-9602415-0-1