US 12,111,673 B2
Multi-phase voltage regulator control
Hung Van Tu, Largo, FL (US); Thaichong Li, Oldsmar, FL (US); James Robert Wulff, Clearwater, FL (US); Lawrence Deward Bach, St. Petersburg, FL (US); Ravi Manda, Palm Harbor, FL (US); and Murty Yalla, Largo, FL (US)
Assigned to Hubbell Incorporated, Shelton, CT (US)
Filed by Hubbell Incorporated, Shelton, CT (US)
Filed on Aug. 24, 2023, as Appl. No. 18/455,138.
Application 18/455,138 is a continuation of application No. 17/893,717, filed on Aug. 23, 2022, granted, now 11,747,840.
Claims priority of provisional application 63/251,342, filed on Oct. 1, 2021.
Claims priority of provisional application 63/241,294, filed on Sep. 7, 2021.
Claims priority of provisional application 63/236,080, filed on Aug. 23, 2021.
Prior Publication US 2023/0393597 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G05F 1/14 (2006.01); G05F 1/147 (2006.01)
CPC G05F 1/147 (2013.01) 20 Claims
OG exemplary drawing
 
1. A control system for a multi-phase power system including a first phase line, a second phase line, and a third phase line, the control system comprising:
a first regulator control configured to control a first tap changer;
a second regulator control configured to control a second tap changer;
a third regulator control configured to control a third tap changer, each of the first tap changer, the second tap changer, and the third tap changer associated with a respective phase line;
a converter circuit configured to convert power flowing through the first, second, and third phase lines to levels used for powering the first, second, and third tap changers; and
an electronic processor coupled to the first regulator control, the second regulator control, and the third regulator control, the electronic processor configured to:
determine whether a voltage level of the first phase line exceeds a threshold;
control a first relay to power the first tap changer with power converted from the first phase line to affect a tap change on the first phase line when the voltage level of the first phase line exceeds the threshold; and
control a second relay to power the first tap changer with power converted from the second phase line to affect a tap change on the first phase line when the voltage of the first phase line does not exceed the threshold.