A novel asymmetrical connection balance transformer for traction power supply

Authors : ZHIWEI XU, LONGFU LUO, ZHIWEN ZHANG, YONG LI

Pages : 1284-0

Doi:10.3906/elk-1304-195

View : 13 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Balance transformers can usually eliminate the zero sequence current and suppress the negative sequence current. This paper develops a novel approach for balance transformers, which is different from the traditional one with two-phase or three-phase symmetrical windings. First, the basic principle and the connected scheme of the transformer are clarified. Second, this paper derives the relationship between the primary and the second windings from a mathematical model for the new approach. Third, the balance condition insert ignore into journalissuearticles values(i.e. the neutral current in the primary side is zero); and the decoupling condition of the two-phase system are also obtained. Finally, the correctness and feasibility of the new approach are verified by the experimental results of a 1-kVA model transformer. Compared to the traditional balance transformers, the new approach has better performance and can be applied to the two-phase or single power supply, such as the traction power supply in electric railway.
Keywords : Connection scheme, balance condition, asymmetrical winding, traction power supply