US 12,228,596 B2
Power quality analysis system and method for monitoring from the outside of multiconductor cables
Bo Eskerod Madsen, Østbirk (DK)
Assigned to REMONI A/S, Skanderborg (DK)
Filed by REMONI A/S, Skanderborg (DK)
Filed on Jul. 27, 2022, as Appl. No. 17/874,484.
Application 17/874,484 is a continuation of application No. PCT/DK2021/050039, filed on Feb. 8, 2021.
Claims priority of application No. PA 2020 00186 (DK), filed on Feb. 15, 2020.
Prior Publication US 2022/0365118 A1, Nov. 17, 2022
Int. Cl. G01R 19/25 (2006.01); G01R 15/14 (2006.01); G01R 23/20 (2006.01)
CPC G01R 19/2513 (2013.01) [G01R 15/14 (2013.01); G01R 15/144 (2013.01); G01R 23/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power quality analysis system for carrying out power quality analysis and detecting power quality distortions in an electrical environment, comprising:
one or more power consuming units each electrically connected to a main power supply by a multiconductor cable that comprises a plurality of conductors insulated from each other;
a plurality of clamp-on power quality sensors configured to provide one or more power quality analysis measurements and to detect power quality distortions when the clamp-on power quality sensors are clamped onto an outside of or arranged in proximity of the multiconductor cable, wherein the clamp-on power quality sensors are not electrically connected to any of the conductors of the multiconductor cable;
wherein each of the clamp-on power quality sensors comprises a plurality of sub-sensors selected from coils, Hall-effect sensors, and/or capacitive probes positioned so that different sub-sensors measure different superpositions of combined electromagnetic fields induced by the conductors of the multiconductor cable;
at least one central power quality unit sensor measuring overall power quality;
a calculation unit adapted to use a mathematical statistical model which combines measurements made by the clamp-on power quality sensors and measurements made by the central power quality unit sensor, the mathematical statistical model comprising:
1) a mathematical function component modelling latent mapping from the central power quality unit sensor measurements onto the clamp-on power quality sensor measurements; and
2) a stochastic component modelling measurement noise and a part of each central power quality unit sensor measurement associated with usage not measured by the clamp-on power quality sensors.