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

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Paper number
1619
Working Group Number
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.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
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