Title :
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
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;
Conference_Titel :
Power Symposium, 1990., Proceedings of the Twenty-Second Annual North American
Conference_Location :
Auburn, AL
Print_ISBN :
0-8186-2115-X
DOI :
10.1109/NAPS.1990.151383
