Effects of under-load tap changer (LTC) on power system voltage stability

Author

Momoh, James A. ; Zhang, Yi ; Young, Gordon J.

Author_Institution

Dept. of Electr. Eng., Howard Univ., Washington, DC, USA

fYear

1990

fDate

15-16 Oct 1990

Firstpage

298

Lastpage

303

Abstract

The effect of load tap changer (LTC) action on a transformer´s adjusted side voltage (usually the secondary side of step-down transformers) is evaluated when the tap position on LTC is raised (lowered) to increase (decrease) the adjusted side voltage. The effects of other measures such as series and shunt compensation and their combination with LTCs are also evaluated. A static representation model of a power system model on a large populated industrial center such as the Puget Sound area of Bonneville Power Administration and the Boston area of New England Power Service are evaluated. The characterization of reactive power voltage (Q-V) relation and real power voltage (P-V) relation curves during a voltage degradation process is studied. The results and experience gained from system specific applications are enumerated

Keywords

load (electric); power systems; power transformers; stability; Bonneville Power Administration; New England Power Service; adjusted side voltage; power system voltage stability; reactive power; real power; series compensation; shunt compensation; step-down transformers; under-load tap changer; voltage degradation; Equations; Load modeling; Monitoring; Power system dynamics; Power system modeling; Power system stability; Reactive power; Transformers; Virtual colonoscopy; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Symposium, 1990., Proceedings of the Twenty-Second Annual North American

Conference_Location

Auburn, AL

Print_ISBN

0-8186-2115-X

Type

conf

DOI

10.1109/NAPS.1990.151383

Filename

151383