US 12,068,589 B2
Arrester performance monitoring and maintenance system
Joseph R Rostron, McDonough, GA (US); Rajesh Anand, McDonough, GA (US); and Jiyuan Fan, Duluth, GA (US)
Assigned to SOUTHERN STATES, LLC, Hampton, GA (US)
Filed by Southern States, LLC, Hampton, GA (US)
Filed on Oct. 31, 2022, as Appl. No. 17/978,185.
Prior Publication US 2024/0146047 A1, May 2, 2024
Int. Cl. H02H 1/00 (2006.01); H01C 7/12 (2006.01); H02G 13/00 (2006.01); H02H 1/04 (2006.01); H02H 3/22 (2006.01); H02H 9/06 (2006.01)
CPC H02G 13/60 (2013.01) [H01C 7/12 (2013.01); H02G 13/80 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for monitoring an electric power lightning arrester, comprising:
providing an arrester current sensor providing an arrester current measurement, and an arrester voltage sensor providing an arrester voltage measurement;
detecting a switching signature based on the arrester current measurement or the arrester voltage measurement distinguished from background noise and lightning signatures;
computing a measured arrester impedance based on the arrester current and arrester voltage measurements,
comparing the measured arrester impedance to a nominal or historical arrester impedance;
determining that the arrester is faltering based on the comparison of the measured arrester impedance to the nominal or historical arrester impedance;
placing an order for replacement of the arrester based on the determination that the arrester is faltering.