US 11,988,703 B2
Monitoring system for evaluating a condition of an electrical grid
Douglas B. Gundel, Cedar Park, TX (US); Uri Bar-Ziv, Zichron Yaakov (IL); and Eyal Doron, Caesarea (IL)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US); and Connected Intelligence Systems Ltd., Netanya (IL)
Appl. No. 17/757,428
Filed by 3M Innovative Properties Company, St. Paul, MN (US); and Connected Intelligence Systems Ltd., Netanya (IL)
PCT Filed Dec. 31, 2020, PCT No. PCT/US2020/067683
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/138569, PCT Pub. Date Jul. 8, 2021.
Claims priority of provisional application 62/955,500, filed on Dec. 31, 2019.
Prior Publication US 2023/0324440 A1, Oct. 12, 2023
Int. Cl. G01R 31/12 (2020.01); G01R 15/16 (2006.01); G01R 19/25 (2006.01); G01R 31/08 (2020.01)
CPC G01R 31/1272 (2013.01) [G01R 15/16 (2013.01); G01R 19/2513 (2013.01); G01R 31/081 (2013.01); G01R 31/085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A monitoring system comprising a node configured to couple to a multiphase electric power line comprising a plurality of cables, the plurality of cables comprising a first cable carrying a first phase and a second cable carrying a second phase, each cable comprising a central conductor, a shield layer, and a jacket layer concentrically surrounding the shield layer, wherein the node comprises:
a first coupling layer disposed over the jacket layer of the first cable and capacitively coupled to the shield layer of the first cable; and
a second coupling layer disposed over the jacket layer of the second cable and capacitively coupled to the shield layer of the second cable;
wherein the node is differentially coupled to the first and second cables to generate a differential data signal, and wherein the node is configured to use the first or second coupling layer to perform at least one of:
sensing a native signal within the first or second cable;
injecting an intentional signal into the first or second cable;
receiving an intentional signal from within the first or second cable; or
providing a channel characterization of the first or second cable.