Title :
Voltage unbalance in 3- and 4-wire delta secondary systems
Author :
Smith, D.R. ; Braunstein, H.R. ; Borst, J.D.
Author_Institution :
Westinghouse Electric Corp., Pittsburgh, PA, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
An analytical method for finding voltage unbalance in 4-wire delta secondaries is introduced in which primary system voltage unbalance is represented, and the equation for total voltage unbalance at the load identifies the individual of unbalance. The effect of load representation, distribution transformer impedance, and primary system voltage unbalance is illustrated. It is shown that the open-wye-open-delta bank can magnify the voltage unbalance of a primary system, and that rolling phases might be a temporary solution to the voltage unbalance problem
Keywords :
distribution networks; power systems; power transformers; delta secondary systems; distribution transformer impedance; load representation; open-wye-open-delta bank; power transformers; primary system; rolling phases; voltage unbalance; Circuits; Cities and towns; Conductors; Equations; Impedance; Induction motors; Reactive power; Rectifiers; Senior members; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
