US 12,149,084 B2
Sensors for use in HVDC power transmission networks
Ajay Koliwad, Oreland, PA (US); Li Zou, Stafford (GB); Markus Andre Offergeld, Constance (DE); and Madhusudan Nandula, Stafford (GB)
Assigned to GE INFRASTRUCTURE TECHNOLOGY LLC, Greenville, SC (US)
Filed by General Electric Technology GmbH, Baden (CH)
Filed on Aug. 15, 2022, as Appl. No. 17/888,078.
Prior Publication US 2024/0055864 A1, Feb. 15, 2024
Int. Cl. H02J 3/36 (2006.01); G01R 31/08 (2020.01); H02H 7/26 (2006.01)
CPC H02J 3/36 (2013.01) [G01R 31/085 (2013.01); H02H 7/268 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensor failure detector, for use in HVDC power transmission networks, comprising an intelligent electronic device having:
a first input to receive in-use a plurality of first sample values from a first sensor measuring a given operational characteristic;
a second input to receive in-use a plurality of second sample values from a second sensor measuring the same given operational characteristic; and
a comparator module programmed to compare the first and second sample values with one another and to establish a sensor failure when the first and second sample values differ from one another by more than a primary threshold for a predetermined first number of samples greater than one.