US 11,811,219 B2
Restoration of fault insulated feeder
Ritwik Majumder, Västerås (SE); Bertil Berggren, Västerås (SE); David Schaeffer, Västerås (SE); Lidong Zhang, Västerås (SE); and Frans Dijkhuizen, Skultuna (SE)
Assigned to ABB Schweiz AG, Baden (CH)
Appl. No. 17/753,155
Filed by ABB Schweiz AG, Baden (CH)
PCT Filed Aug. 28, 2019, PCT No. PCT/EP2019/072986
§ 371(c)(1), (2) Date Feb. 22, 2022,
PCT Pub. No. WO2021/037357, PCT Pub. Date Mar. 4, 2021.
Prior Publication US 2022/0337051 A1, Oct. 20, 2022
Int. Cl. H02J 3/36 (2006.01); H02H 7/26 (2006.01); H02J 3/00 (2006.01)
CPC H02H 7/268 (2013.01) [H02J 3/0073 (2020.01); H02J 3/36 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for restoration of a fault isolation in a medium voltage, MV, network having a plurality of feeders and a plurality of normally open, NO, switches in parallel with MV direct current, DC, links, the method being performed in a control device of the MV network, and the method comprising:
closing at least two NO switches in parallel with MVDC links of the plurality of NO switches, being connected to a fault isolated feeder of the plurality of feeders of the MV network;
selecting which of the closed at least to NO switches in parallel with MVDC links not to open, wherein the selection is based on power flows through the closed at least two NO switches in parallel with MVDC links; and
opening the closed at least two NO switches in parallel with MVDC links except one.