Patent ID: 8519681
Filing Date: 2013-08-27
Classification: G05F

Abstract:
1. A voltage regulator for regulating a system voltage on a power distribution system, the voltage regulator comprising: source-side bushings connected to the power distribution system at a first location; load-side bushings connected to the power distribution system at a second location; the system voltage across the load-side bushings for forward power flow and across the source-side bushings for reverse power flow; a first transformer connected between one of the source side bushings or the load side bushings, the first transformer having a non-standard turns ratio between a primary winding and a secondary winding; a second transformer connected between another of the source side bushings or the load side bushings, the second transformer having a standard turns ratio between a primary winding and a secondary winding; the first transformer producing a first analog voltage and the second transformer producing a second analog voltage; a first apparatus converting the first analog voltage to a first digital value and the second analog voltage to a second digital value; a tap changer; a microprocessor producing a corrected first digital value responsive to the first digital value and to a correction factor, the correction factor compensating the non-standard turns ratio of the first transformer; the microprocessor producing a control signal operating the tap changer to regulate the system voltage to a desired value, the control signal responsive to one of the corrected first digital value and the second digital value; a second apparatus converting the corrected first digital value to a corrected analog voltage; and conductors carrying at least one of the corrected analog voltage and the second analog voltage to accessible terminals of the voltage regulator, the terminals for receiving a measuring device for measuring a voltage between the terminals.