US 11,988,698 B2
Verifying the accuracy of measurements taken by an electricity meter
Henri Teboulle, Rueil Malmaison (FR); and Christophe Grincourt, Rueil Malmaison (FR)
Assigned to SAGEMCOM ENERGY & TELECOM SAS, Rueil Malmaison (FR)
Filed by SAGEMCOM ENERGY & TELECOM SAS, Rueil Malmaison (FR)
Filed on Aug. 2, 2021, as Appl. No. 17/391,906.
Claims priority of application No. 20 08760 (FR), filed on Aug. 27, 2020.
Prior Publication US 2022/0065907 A1, Mar. 3, 2022
Int. Cl. G01R 22/06 (2006.01)
CPC G01R 22/068 (2013.01) 19 Claims
OG exemplary drawing
 
1. An evaluation method for evaluating the accuracy of a measurement device of an electricity meter, the evaluation method being performed by and in the electricity meter and comprising:
a preliminary stage comprising a step of acquiring first measurements of a first electrical magnitude, and a step of detecting a period of stability during which the first electrical magnitude is stable;
a test stage following detection of the period of stability and comprising an injection step for injecting a test current into a conductor of the electricity meter for a predetermined duration, and a step of acting during the injection step to acquire at least one second measurement of the first electrical magnitude;
an evaluation stage comprising a step of comparing the second measurement of the first electrical magnitude with a sum of a first stability value representative of the first electrical magnitude during the period of stability plus a predefined value corresponding to an expected increase in the first electrical magnitude due to injecting the test current, and a step of evaluating the accuracy of the measurement device from said comparison.