Title :
Research on Large DC-Biased Power Transformer
Author :
Zhu, Weilu ; Yan, Caihong ; Jia, Yongjiang
Author_Institution :
Sch. of Electr. Eng. & Inf. Sci., Hebei Univ. of Sci. & Technol., Shijiazhuang, China
Abstract :
A 3D transient eddy current field analytical method is presented to calculate the additional loss and temperature rising in three-phase banks with separate single-phase transformers under DC biasing current. A SF-31500/110 double-winding transformer connected in two-phase exciting mode is applied to test the calculated data, and countermeasures against DC bias are proposed based on the discussion of influences on the excitation current and magnetic flux.
Keywords :
eddy current losses; magnetic flux; matrix algebra; power transformers; transformer windings; transient analysis; 3D transient eddy current field analytical method; SF-31500/110 double-winding transformer; excitation current; large DC-biased power transformer; magnetic flux; single-phase transformers; three-phase banks; two-phase exciting mode; Circuit faults; Magnetic flux; Power transformer insulation; Saturation magnetization; Transformer cores; Windings; 3D transient eddy current field; DC bias; excitation current; exciting mode; three-phase banks with separate single-phase transformers;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.997
