Transformer winding selection associated with reconfiguration of existing double circuit line to six-phase operation

Author

Stewart, James R. ; Oppel, Laurie J. ; Thomann, Gary C. ; Dorazio, Thomas F. ; Rebbapragada, R.V.

Author_Institution

Power Technol. Inc., Schenectady, NY, USA

Volume

7

Issue

2

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

979

Lastpage

985

Abstract

Conversion of an existing double circuit three-phase 115 kV overhead transmission line to six-phase operation will provide a commercial demonstration of 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. Results are presented 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° shift between phases

Keywords

phase convertors; power convertors; power overhead lines; power transformers; switching; transformer windings; 115 kV; cost; delta-wye; overhead transmission line; phase convertors; power convertors; power transmission; single pole switching; six-phase; three-phase; transformers; winding selection; Circuit simulation; Coupling circuits; Impedance; Leg; Magnetic analysis; Magnetic switching; Switches; Switching circuits; Voltage; Windings;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.127107

Filename

127107