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A study on the effect of the Scott transformer on the three-phase unbalance in distribution network with single-phase generators

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3 Author(s)
Aihara, Y. ; Dept. of Electr. Eng., Tokyo Univ. of Sci., Tokyo, Japan ; Miyazawa, R. ; Koizumi, H.

Global environmental problem and the resources problem are getting more important. It is expected that dispersed power systems are spread widely. On the other hand, the increase of the dispersed generators may cause the three-phase unbalance in a distribution network. This study focuses on the possibility of the Scott transformer to reduce the three-phase unbalance in the distribution system. The Scott transformer transforms three phases to two phases. It has been used as a feeding transformer in electric traction system. The difference of behavior between the distribution systems with the Scott transformer and the V-connected transformer is observed in simulation with PSIM. For the secondary side loads of the transformer, resistive loads and dispersed generations are given under the balanced/unbalanced three-phase condition. The simulation results show that the Scott transformer has a better effect on a current and a voltage balancing than the V-connected transformer.

Published in:

Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on

Date of Conference:

25-28 June 2012