US 12,487,267 B2
Fault location determination in a power transmission system
Od Naidu, Karnataka (IN); Neethu George, Karnataka (IN); Preetham Venkat Yalla, Karnataka (IN); and Suresh Maturu, Andhra Pradesh (IN)
Assigned to Hitachi Energy Ltd, Zürich (CH)
Appl. No. 18/024,702
Filed by Hitachi Energy Ltd, Zürich (CH)
PCT Filed Sep. 16, 2021, PCT No. PCT/EP2021/075449
§ 371(c)(1), (2) Date Mar. 3, 2023,
PCT Pub. No. WO2022/058410, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 202041040309 (IN), filed on Sep. 17, 2020; and application No. 21152166 (EP), filed on Jan. 18, 2021.
Prior Publication US 2023/0324451 A1, Oct. 12, 2023
Int. Cl. G01R 31/08 (2020.01)
CPC G01R 31/086 (2013.01) 18 Claims
OG exemplary drawing
 
1. A method for fault location in a power transmission system, the method comprising:
obtaining samples of voltage and current measured at a terminal of the transmission line during a fault;
calculating a first equivalent reactance value based on the samples of voltage and current;
determining a first fault location based on the calculated equivalent reactance value;
calculating at least one subsequent equivalent reactance value based on subsequent samples of voltage and current; and
determining at least one subsequent fault location based on the calculated respective at least one subsequent equivalent reactance value.