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Effect of Winding Configuration on the kVA Rating of Wye-Connected Autotransformer Applied to 12-Pulse Rectifier
Fangang Meng, Qingxiao Du, Lei Gao, Quanhui Li and Zhongcheng Man
Abstract This paper presents the effect of winding configuration on the kVA rating of wye-connected autotransformer applied to the 12-pulse rectifier. In order to describe the winding configuration of the wye-connected autotransformer, a position parameter and a proportional parameter are defined. The quantitative relation between the position parameter and the proportional parameter is calculated, and the voltages across and currents through the windings are also calculated under different winding connections. Consequently, a relation between the kVA rating and the position parameter is established according to the above analysis, and based on the relation, the optimal winding configuration is obtained. A wye-connected autotransformer with the least equivalent kVA rating and simplest winding configuration is designed and applied to the 12-pulse rectifier. Some simulation and experiments are carried out to validate the theoretical analysis.
Keyword Wye-connected autotransformer, Winding configuration, kVA rating, Optimal design
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