US 11,874,309 B2
Accuracy for phasor measurement units (synchrophasors) in utility distribution applications
Michael John Meisinger, Sr., Chicago, IL (US); Peter S. Curtiss, Boulder, CO (US); Yoav Sharon, Evanston, IL (US); and Michael Quinlan, Chicago, IL (US)
Assigned to S&C Electric Company, Chicago, IL (US)
Filed by S&C Electric Company, Chicago, IL (US)
Filed on Sep. 13, 2022, as Appl. No. 17/943,604.
Claims priority of provisional application 63/272,211, filed on Oct. 27, 2021.
Prior Publication US 2023/0132216 A1, Apr. 27, 2023
Int. Cl. G01R 25/00 (2006.01); G01R 35/00 (2006.01); G01R 15/16 (2006.01); G01R 15/18 (2006.01)
CPC G01R 25/00 (2013.01) [G01R 15/16 (2013.01); G01R 15/181 (2013.01); G01R 35/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A switching device for controlling power flow on at least one power line, the device comprising:
a current sensor for measuring primary current on the line;
a first voltage sensor for measuring primary voltage on the line at one side of the switching device;
a second voltage sensor for measuring primary voltage on the line at another side of the switching device;
an analog-to-digital converter (ADC) for converting measurement signals from the current sensor and the voltage sensors to digital signals; and
a phasor measurement unit (PMU) responsive to the primary current and voltage measurement digital signals and calibration data, the PMU calculating magnitude and phase angle synchrophasor data.