US 12,463,414 B2
Method and system for detecting phenomenon in electrical power network
Jani Valtari, Vaasa (FI)
Assigned to ABB Schweiz AG, Baden (CH)
Appl. No. 18/246,994
Filed by ABB Schweiz AG, Baden (CH)
PCT Filed Sep. 24, 2021, PCT No. PCT/EP2021/076411
§ 371(c)(1), (2) Date Mar. 28, 2023,
PCT Pub. No. WO2022/064010, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 20198641 (EP), filed on Sep. 28, 2020.
Prior Publication US 2024/0006868 A1, Jan. 4, 2024
Int. Cl. H02H 3/28 (2006.01); G01R 31/52 (2020.01); G01R 31/58 (2020.01); H02H 1/00 (2006.01); H02H 3/36 (2006.01); H02H 7/26 (2006.01)
CPC H02H 3/28 (2013.01) [G01R 31/52 (2020.01); G01R 31/58 (2020.01); H02H 1/0092 (2013.01); H02H 3/36 (2013.01); H02H 7/261 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for detecting a phenomenon in an electrical power network comprising at least one protection zone with at least two subzones, the method including measuring in the subzones of the protection zone at least one current signal actual in the respective subzone,
determining linear dependencies between the at least one measured current signal actual in each subzone of the protection zone and the corresponding at least one measured current signal actual in each another subzone of the protection zone, and
detecting the phenomenon in the protection zone of the electrical power network based on the determined linear dependencies, wherein the linear dependencies are determined by computing at least one correlation coefficient between the at least one measured current signal actual in each subzone of the protection zone and the corresponding at least one measured current signal actual in each another subzone of the protection zone,
wherein the at least one computed correlation coefficient is compared with at least one limit value indicating a degree of linear dependency for detecting the phenomenon in the protection zone of the electrical power network,
wherein in response to the at least one computed correlation coefficient indicating significant degree of linear dependency between corresponding current signals actual in at least two subzones of the protection zone the phenomenon having taken place in the protection zone of the electrical power network is detected,
wherein the correlation coefficients indicating significant degree of linear dependency between corresponding current signals actual in at least two different subzones are compared for determining the subzone where the phenomenon has taken place and/or a type of the phenomenon, and
wherein the phenomenon is a fault appearing in the galvanically interconnected electrical power network.