US 12,149,156 B1
Bipole power transmission schemes
Ajay Koliwad, Oreland, PA (US); Madhusudan Nandula, Stafford (GB); Neil Cuthbert, Stafford (GB); and Markus Andre Offergeld, Constance (DE)
Assigned to GE INFRASTRUCTURE TECHNOLOGY LLC, Greenville, SC (US)
Filed by GE INFRASTRUCTURE TECHNOLOGY LLC, Greenville, SC (US)
Filed on Jul. 14, 2023, as Appl. No. 18/352,586.
Int. Cl. H02J 3/36 (2006.01); H02M 1/00 (2006.01)
CPC H02M 1/0012 (2021.05) [H02J 3/36 (2013.01)] 12 Claims
OG exemplary drawing
 
12. A method of operating a bipole power transmission scheme, comprising:
at least a first converter station positioned in-use separate from at least a second converter station, and at least first and second transmission conduits and a first return conduit to in-use interconnect the first converter station with the second converter station and thereby permit the transfer of power between the first and second converter stations,
the first converter station including:
a first power converter having a first DC terminal connected with the first transmission conduit, a second DC terminal connected with the first return conduit, and at least one first AC terminal for connection with a first AC network element, operation of the first power converter to transfer power between the first transmission conduit and the first AC network element being controlled by a first converter control function;
a second power converter having a third DC terminal connected with the first return conduit, a fourth DC terminal connected with the second transmission conduit, and at least one second AC terminal for connection with a second AC network element, operation of the second power converter to transfer power between the second transmission conduit and the second AC network element being controlled by a second converter control function;
a first digital controller running an active instance of the first converter control function;
a second digital controller running a standby instance of the first converter control function;
a third digital controller running an active instance of the second converter control function; and
a fourth digital controller running a standby instance of the second converter control function,
one of the first, second, third and fourth digital controllers additionally running an active instance of a first converter station control function which generates station control data to control operation of the first converter station, and another of the first, second, third and fourth digital controllers additionally running a standby instance of the first converter station control function,
the first, second, third and fourth digital controllers being interconnected with one another by a communication interface whereby the first digital controller is able to share active first converter operational data with each of the other digital controllers, the second digital controller is able to share standby first converter operational data with each of the other digital controllers, the third digital controller is able to share active second converter operational data with each of the other digital controllers, and the fourth digital controller is able to share standby second converter operational data with each of the other digital controllers,
the method of the invention comprising the steps of:
(a) configuring each of the digital controllers running an active instance of a converter control function to import the active operational data of the other digital controller running an active instance of a converter control function, and
(b) configuring each of the digital controllers running a standby instance of a converter control function to import the active operational data of each of the digital controllers running an active instance of a converter control function.