US 12,455,304 B2
Smart grid sensor with power harvesting from low line currents
Liron Frenkel, Netanya (IL)
Assigned to MEGGER GRID ANALYTICS LTD, Herzliya (IL)
Appl. No. 18/035,761
Filed by MEGGER GRID ANALYTICS LTD, Herzliya (IL)
PCT Filed Nov. 17, 2021, PCT No. PCT/IL2021/051372
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/107137, PCT Pub. Date May 27, 2022.
Claims priority of provisional application 63/114,544, filed on Nov. 17, 2020.
Prior Publication US 2023/0408561 A1, Dec. 21, 2023
Int. Cl. G01R 19/25 (2006.01); G01R 15/18 (2006.01); G01R 21/06 (2006.01); G01R 31/08 (2020.01)
CPC G01R 19/2513 (2013.01) [G01R 15/183 (2013.01); G01R 21/06 (2013.01); G01R 31/085 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A system for sensing power in a power line, comprising:
a power storage device to serve as a backup power storage for the system;
a processor and circuit configured to analyze the current sensed in the power line and/or the level of power stored by the power storage device;
a switch configured to connect or disconnect the power storage device from the processor and circuit of the sensor system;
a latch circuit configured to maintain a state of the switch until it is changed by the processor or when an indication of a sufficient amount of available current in the power line is detected;
wherein the processor senses the power in the power line and the power storage device periodically and when the power is not sufficient to power the processor and circuit the processor closes the switch, which enters an OFF state that is maintained by the latch circuit, and the power storage device is disconnected, when current in the power line rises and charges the processor and circuit, the processor opens the switch automatically, the switch enters an ON state, and the power storage device is reconnected.