Experiences with parallel EHV phase shifting transformers

Author

Bladow, J. ; Montoya, A.

Author_Institution

Western Area Power Adm., Golden, CO, USA

Volume

6

Issue

3

fYear

1991

fDate

7/1/1991 12:00:00 AM

Firstpage

1096

Lastpage

1100

Abstract

Phase shifting transformers (PSTs) are used to control unscheduled power flow in interconnected power systems. The authors discuss the application, protection, commissioning, and initial operating history of two sets of parallel, 300 MVA, 345 kV PSTs. The four Western Area Power Administration (WAPA) PSTs were energized in 1989 and are located in northwestern New Mexico in Shiprock and Waterflow substations. The installations are unique because two PSTs, using a series no-load and load tap changer (LTC) design, are operated in parallel at each location. A fault in the main LTC compartment later removed one unit from service, but the installation of parallel units at each location allowed for continued operation and control of the power flow on the two lines

Keywords

load flow; load regulation; power system interconnection; power transformers; 300 MVA; 345 kV; New Mexico; Shiprock substations; WAPA; Waterflow substations; Western Area Power Administration; interconnected power systems; load tap changer; parallel EHV phase shifting transformers; series no-load tap changer; unscheduled power flow control; History; Integrated circuit interconnections; Interconnected systems; Load flow; Load flow control; Power & Energy Society; Power system interconnection; Power system protection; Substation protection; Transformers;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.85853

Filename

85853