US 12,308,637 B2
Current sinking arrangement
Vladimir Rozenshtein, Givatayim (IL); Dvir Landwer, Givatayim (IL); and Uri Gabri, Givatayim (IL)
Assigned to GridON Ltd, Givatayim (IL)
Appl. No. 18/038,587
Filed by GridON Ltd, Givatayim (IL)
PCT Filed Nov. 23, 2021, PCT No. PCT/IB2021/060862
§ 371(c)(1), (2) Date May 24, 2023,
PCT Pub. No. WO2022/112938, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2018480 (GB), filed on Nov. 24, 2020.
Prior Publication US 2023/0411955 A1, Dec. 21, 2023
Int. Cl. H02H 9/02 (2006.01)
CPC H02H 9/02 (2013.01) 20 Claims
OG exemplary drawing
 
1. A current sinking arrangement for connection to three phases of an AC grid, operable for reduction of short circuit currents in the AC grid, the current diverting arrangement comprising:
a first phase arrangement including:
a first grid terminal connectable to a node of a first phase of the three phase AC grid and a second grid terminal connectable to another node of the first phase of the three phase AC grid, the first phase arrangement having a first node between the first grid terminal and the second grid terminal;
a current diversion branch having a first end connected to the first node and a second end connected to a second node, the current diversion branch comprising a first impedance connected in series between the first end and the second end, and a first switch connected in series between the first end and the second end, and wherein the first switch is not conducting in a first state and is conducting in a second state;
a second phase arrangement including:
a first grid terminal connectable to a node of a second phase of the three phase AC grid and a second grid terminal connectable to another node of the second phase of the three phase AC grid, the second phase arrangement having a first node between the first grid terminal and the second grid terminal;
a current diversion branch having a first end connected to the first node and a second end connected to a second node, the current diversion branch comprising a first impedance connected in series between the first end and the second end, and a first switch connected in series between the first end and the second end, and wherein the first switch is not conducting in the first state and conducting in the second state;
a third phase arrangement including:
a first grid terminal connectable to a node of a third phase of the three phase AC grid and a second grid terminal connectable to another node of the third phase of the three phase AC grid, the third phase arrangement having a first node between the first grid terminal and the second grid terminal;
a current diversion branch having a first end connected to the first node and a second end connected to a second node, the current diversion branch comprising a first impedance connected in series between the first end and the second end, and a first switch connected in series between the first end and the second end, and wherein the first switch is not conducting in the first state and conducting in the second state;
a switching arrangement arranged to control the first switch of the first phase arrangement, the first switch of the second phase arrangement, and the first switch of the third phase arrangement;
wherein the second nodes of the first phase arrangement, the second phase arrangement, and the third phase arrangement are all connected to a common floating conductor;
wherein the first state represents normal conditions on the AC grid and the second state represents a fault condition on the AC grid;
wherein, on reception of a signal indicating the second state, the switching arrangement is arranged to make the first switch of the first phase arrangement, the first switch of the second phase arrangement, and the first switch of the third phase arrangement conducting;
wherein, when the first switches are in the second state, the current diversion branches are arranged to divert a portion of the fault current away from the AC grid fault location to the common floating conductor.