DocumentCode :
585914
Title :
Comparison of methods for measuring zero sequence impedances in 3-phase core-type transformers
Author :
Sorrentino, Elmer ; Burgos, Juan Carlos
Author_Institution :
Univ. Simon Bolivar, Caracas, Venezuela
fYear :
2012
fDate :
4-7 Sept. 2012
Firstpage :
1
Lastpage :
5
Abstract :
This paper deals with two topics about the measurement of zero sequence impedances in 3-phase core-type transformers. The first topic is a comparison of 3 methods to perform the measurement in a 3-phase winding: a) parallel connection of windings; b) series connection of windings; and c) measurement of elements of the phase impedance matrix. A brief theoretical discussion about these methods is included. The second topic is a comparison of 2 methods for measuring the zero-sequence impedance for the Dyn connection: a) with all the delta branches short-circuited; and b) without short-circuiting the delta branches. The results for the Dyn connection are compared with the obtained ones for YNyn connection, by using the standardized method for this test (parallel connection of star windings). A discussion about the results is included.
Keywords :
electric impedance measurement; power transformers; transformer windings; 3-phase core-type transformers; 3-phase winding; Dyn connection; YNyn connection; delta branches short-circuited; parallel connection; phase impedance matrix; series connection; star windings; zero sequence impedance measurement; Current measurement; Impedance; Impedance measurement; Phase measurement; Symmetric matrices; Voltage measurement; Windings; Zero sequence impedance in transformers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Universities Power Engineering Conference (UPEC), 2012 47th International
Conference_Location :
London
Print_ISBN :
978-1-4673-2854-8
Electronic_ISBN :
978-1-4673-2855-5
Type :
conf
DOI :
10.1109/UPEC.2012.6398626
Filename :
6398626
Link To Document :
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