Title:	Four-Leg Transformer with Defined Zero Sequence Impedance for Ground Fault Compensation
Authors:	Rezaei, Mohsen Talla, Jakub Komrska, Tomáš Peroutka, Zdeněk
Citation:	2021 International Conference on Applied Electronics: Pilsen, 7th – 8th September 2021, Czech Republic, p. 157-162.
Issue Date:	2021
Publisher:	University of West Bohemia
Document type:	conferenceObject konferenční příspěvek
URI:	http://hdl.handle.net/11025/45585
ISBN:	978–80–261–0972–3 (Print) 978–80–261–0973–0 (Online)
ISSN:	1803–7232 (Print) 1805–9597 (Online)
Keywords:	Single Earth Fault;distribuční mřížka;Petersenova cívka;proud nulové sekvence;transformátor
Keywords in different language:	Single Earth Fault;distribution grid;Petersen coil;Zero Sequence Current;transformer
Abstract in different language:	Single-phase ground faults are the most common faults in medium-voltage distribution grids. High-impedance grid grounding using a special four-leg transformer is discussed in the paper. The transformer’s zero-sequence impedance differs from positive-sequence impedance and it is designed to compensate the earth faults currents in Medium Voltage (MV) distribution grids when single-phase ground fault occurs. The designed transformer can replace the traditional arc suppression coils (ASC) in the case where no distribution transformer neutral is available or distributed compensation is required. Alternatively, the transformer can operate in parallel with the ASC.
Rights:	© University of West Bohemia, 2021
Appears in Collections:	Konferenční příspěvky / Conference Papers (KEV) Konferenční příspěvky / Conference papers (RICE) Applied Electronics 2021 Applied Electronics 2021

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