Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Patent
1981-05-08
1983-05-17
Shoop, William M.
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
323341, G05F 114
Patent
active
043842470
ABSTRACT:
An under-load switching device particularly adapted for use with a transformer having voltage taps for voltage regulation and for balancing the phase voltages in a multi-phase AC power system includes a pair of rotary tap selectors connected in parallel to the voltage taps, and a pair of switches for alternately connecting the tap selectors to an AC line, such that load current flows through only one tap selector and an associated switch at a time. A control unit monitors the voltage on the AC line, determines the tap required to be selected to compensate for voltage variations, causes the tap selector which is not carrying load current to select the required tap, and operates the switches at a zero-current point to transfer the AC line to the selected tap.
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Westinghouse Transmission and Distribution Reference Book, Fourth Edition, Chapter 5, pp. 121-122.
Stewart, R. E., "The Effects of Power Supply Integrity on Electrical Submergible Pumping Systems", SPE Paper No. 9038.
Shoop William M.
TRW Inc.
Wong Peter S.
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