Title :
Research on sympathetic interaction between transformers
Author :
Shao, Dejun ; Yin, Xianggen ; Zhang, Zhe ; Chen, Deshu ; Zhang, Kanjun
Author_Institution :
Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
The phenomenon of sympathetic interaction between transformers is discussed in this paper. A mathematical model is developed for two transformers in parallel and in series operation to analyze the origin mechanism of sympathetic interaction. At the same time, its characteristics are further analyzed by numerical simulation. The sympathetic inrush current could influence the transformer differential protection. The physical dynamic simulation experiment results are analyzed, which prove the second harmonic restrain method could restrain the sympathetic inrush and the CT saturation criterion should be used for the differential protection.
Keywords :
current transformers; power transformer protection; CT saturation criterion; dynamic simulation; numerical simulation; second harmonic restrain method; sympathetic inrush current; sympathetic interaction; transformer differential protection; Equations; Equivalent circuits; Fault currents; Inductance; Magnetic analysis; Magnetic circuits; Magnetic flux; Saturation magnetization; Surge protection; Transformers; magnetizing inrush; sympathetic interaction; transformer differential protection;
Conference_Titel :
Universities Power Engineering Conference, 2007. UPEC 2007. 42nd International
Conference_Location :
Brighton
Print_ISBN :
978-1-905593-36-1
Electronic_ISBN :
978-1-905593-34-7
DOI :
10.1109/UPEC.2007.4468959
