Research on the Engineering Application of Balance Transformers Based on Negative Sequence Evaluation
Based on the negative sequence reactive power compensation theory and the port electric quantity transformation relationship,the negative sequence compensation degree of Vx-connected transformer and Scott-balanced transformer for high-speed railway is studied.According to the structural characteristics of railway transformers,the advantages and disadvantages of the two kinds of connection are analyzed.Combined with the actual Application of engineering,the engineering cost and operating cost of the two kinds of connection transformers are compared.Considering the different results of the current high-speed railway power quality assessment,the Application of balanced connection transformer is given.The results show that in the case of poor power quality,Scott-balanced connection transformer has a simple and direct effect on the negative sequence of the power grid.
traction power supplynegative sequencebalanced transformer
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