Apparatus and method for generating a metering voltage output for a voltage regulator using a microprocessor
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United States of America Patent
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Aug 27, 2013
Grant Date -
Aug 16, 2012
app pub date -
Feb 11, 2011
filing date -
Feb 11, 2011
priority date (Note) -
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Abstract
A voltage regulator (10) for regulating a power distribution system voltage during forward or reverse power flow. The voltage regulator (10) accommodates multiple configurations of a tertiary winding (30) and a potential transformer (36) connected across source-side bushings (S/SL) or load-side bushings (L/SL). The invention simulates operation of a potential transformer (36), and the output voltage therefrom, connected across the source-side (S/SL) or load-side bushings (L/SL). The invention also produces a corrected voltage compensating a non-standard turns ratio of the tertiary winding (30). The regulator (10) controls a tap changer (18) to regulate the system voltage according to a digital value representing the voltage across the source-side (S/SL) or load-side bushings (L/SL), comprising a measured voltage, the corrected voltage or the simulated voltage. The digital value is converted to an analog voltage and supplied to external terminals (102) for measuring by a service technician using a voltmeter (104).
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