US 12,218,504 B2
Bipole power transmission networks
Amit Kumar, Stafford (GB); Andrzej Adamczyk, Stafford (GB); Omar Jasim, Stafford (GB); Si Huy Quoc Dang, Stafford (GB); and Rajaseker Reddy Ginnareddy, Stafford (GB)
Assigned to GE INFRASTRUCTURE TECHNOLOGY LLC, Greenville, SC (US)
Filed by General Electric Technology GmbH, Baden (CH)
Filed on Mar. 13, 2023, as Appl. No. 18/182,535.
Claims priority of application No. 22275035 (EP), filed on Mar. 29, 2022.
Prior Publication US 2023/0318301 A1, Oct. 5, 2023
Int. Cl. H02J 3/18 (2006.01); H02J 3/36 (2006.01); H02J 3/38 (2006.01); H02M 7/757 (2006.01)
CPC H02J 3/36 (2013.01) [H02J 3/18 (2013.01); H02J 3/38 (2013.01); H02M 7/7575 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bipole power transmission network, comprising:
a first upstream power converter having a first DC terminal connected with a first transmission conduit extending in-use to a first downstream power converter, a second DC terminal connected with a return conduit extending in-use to the first downstream power converter and a second downstream power converter, and at least one first AC terminal electrically connected with a first AC power source, whereby the first upstream power converter is configured to transfer power between the first AC power source and the first transmission conduit;
a second upstream power converter having a third DC terminal connected with the return conduit, a fourth DC terminal connected with a second transmission conduit extending in-use to the second downstream power converter, and at least one second AC terminal electrically connected with a second AC power source, whereby the second upstream power converter is configured to transfer power between the second AC power source and the second transmission conduit; and
a controller programmed to balance the current flowing in each of the first and second transmission conduits in an event of an issue preventing current from flowing in the return conduit, the controller being further programmed to optimise active power transferred downstream by the transmission conduit having a higher power output at the time of the issue by:
setting, based on a peak AC voltage at the or each corresponding AC terminal of the upstream power converter connected with the lower power transmission conduit, a DC voltage reference that the upstream power converter connected with the transmission conduit having the lower power output at the time of the issue is required to operate the lower power transmission conduit at; and
setting, based on the peak AC voltage, an AC voltage reference that the upstream power converter connected with the lower power transmission conduit is required to maintain at the or each corresponding AC terminal of the upstream power converter connected with the lower power transmission conduit.