US 11,777,307 B2
Electronic valve apparatus
Carl D. Barker, Stafford (GB); Colin Charnock Davidson, Staforrd (GB); John Lewis Outram, Stafford (GB); Timothy James Stott, Stoke-on-Trent (GB); and Robert Stephen Whitehouse, Stafford (GB)
Assigned to General Electric Technology GmbH, Baden (CH)
Appl. No. 17/270,369
Filed by General Electric Technology GmbH, Baden (CH)
PCT Filed Aug. 14, 2019, PCT No. PCT/EP2019/071808
§ 371(c)(1), (2) Date Feb. 22, 2021,
PCT Pub. No. WO2020/038796, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 18190669 (EP), filed on Aug. 24, 2018.
Prior Publication US 2021/0328422 A1, Oct. 21, 2021
Int. Cl. H02J 3/36 (2006.01); H02H 7/26 (2006.01)
CPC H02H 7/268 (2013.01) [H02J 3/36 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electronic valve apparatus for a high voltage direct current, HVDC, power transmission system, comprising:
a first device chain including a plurality of first devices connected in series between an input node and an output node of the electronic valve apparatus, each of the plurality of first devices having an asymmetric transfer function configured substantially to block current flow through the device in a first direction while allowing current to flow with low impedance in the other direction, wherein the plurality of first devices are connected such that they all block current flow in the same direction;
a second device chain including a plurality of second devices connected in series between the input node and the output node, each of the plurality of second devices having an asymmetric transfer function configured substantially to block current flow through the device in the first direction while allowing current to flow with low impedance in the other direction, wherein the plurality of second devices are connected such that they all block current flow in the same direction;
wherein the second device chain is connected in parallel with the first device chain.