Transformer winding selection associated with reconfiguration of existing double circuit line to six-phase operation
1991
Conversion of an existing double circuit three-phase 115 kV overhead transmission line near Binghamton, New York to six-phase operation will provide a commercial demonstration of the feasibility of high phase order power transmission. An important part of this demonstration is specification of the phase/voltage conversion transformers and requirements to permit single pole switching of the line in a practical manner at minimum cost. The results of engineering studies which led to selection of two delta-wye three-phase transformers at each end, one of each pair with reversed polarity to obtain the 60 degrees shift between phases, are presented. >
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