US 12,117,479 B2
Transient based method for identifying faults in a high / medium voltage electric power transmission system
Paul Verrax, Lyons (FR); Alberto Bertinato, Lyons (FR); Michel Kieffer, Lyons (FR); Bertrand Raison, Lyons (FR); and Nathan Alglave, Lyons (FR)
Assigned to SUPERGRID INSTITUTE, Villeurbanne (FR); UNIVERSITE DE PARIS XI PARIS SUD, Orsay (FR); and UNIVERSITE GRENOBLE ALPES, Saint Martin d'heres (FR)
Appl. No. 17/604,823
Filed by SUPERGRID INSTITUTE, Villeurbanne (FR); UNIVERSITE DE PARIS XI PARIS SUD, Orsay (FR); and UNIVERSITE GRENOBLE ALPES, Saint Martin D'heres (FR)
PCT Filed Apr. 16, 2020, PCT No. PCT/EP2020/060775
§ 371(c)(1), (2) Date Oct. 19, 2021,
PCT Pub. No. WO2020/212533, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 19305517 (EP), filed on Apr. 19, 2019.
Prior Publication US 2022/0206055 A1, Jun. 30, 2022
Int. Cl. G01R 31/08 (2020.01); H02H 7/26 (2006.01); H02J 3/36 (2006.01); H02J 13/00 (2006.01)
CPC G01R 31/086 (2013.01) [G01R 31/083 (2013.01); G01R 31/085 (2013.01); H02H 7/268 (2013.01); H02J 13/00002 (2020.01); H02J 3/36 (2013.01); Y02E 60/60 (2013.01); Y04S 10/20 (2013.01); Y04S 10/30 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transient based method for identifying faults in an electric power transmission and/or distribution system comprising a current transmission line, said method comprising
generating a physical model of the current transmission line, the physical model depending on fault parameters and describing the behavior of voltage and/or current transients due to a fault in the current transmission line, said fault parameters comprising a fault location parameter on said current transmission line and a fault impedance parameter,
measuring voltage and/or current evolution at a specific location in said power system,
iteratively simulating the voltage and/or current evolution by the physical model at a measurement point with a set of fault parameters, wherein each step of iteration comprises comparing simulated and measured voltage and/or current evolutions and adapting the set of fault parameters according to a convergence criterion, and
identifying a fault and fault parameters thereof upon having reached convergence of the measured voltage and/or current evolution and the simulated voltage and/or current evolution,
wherein the physical model is based on a telegraph equation for describing the fault parameters and the behavior of travelling waves due to the fault in said electrical power transmission and/or distribution system, and
wherein the only traveling waves are taken into account when iteratively simulating the voltage and/or current evolution are those that can reach the measurement point before a predetermined maximum time tmax between one and ten milliseconds.