Patent ID: 11923687
Assignee: GENERAL ELECTRIC TECHNOLOGY GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A bipole power transmission scheme comprising a first converter station positioned in-use remote from a second converter station, and first and second transmission conduits and a return conduit to in-use interconnect the first converter station with the second converter station and thereby permit the first converter station to transmit power to the second converter station,
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 return conduit, and at least one AC terminal electrically connected with a first variable power source, the first power converter further having a first converter controller programmed to control the transfer of a first power infeed from the first power source into the first transmission conduit in the form of a first power feed; and
a second power converter having a first DC terminal connected with the second transmission conduit, a second DC terminal connected with the return conduit, and at least one AC terminal electrically connected with a second variable power source, the second power converter further having a second converter controller programmed to control the transfer of a second power infeed from the second power source into the second transmission conduit in the form of a second power feed,
the first power converter and associated first power source operating independently of the second power converter and associated second power source during operation of the bipole power transmission scheme under normal conditions whereby the first power infeed into the first transmission conduit and the second power infeed into the second transmission conduit are independent of one another, and
during operation of the bipole power transmission scheme under abnormal conditions when the return conduit is faulty and unable to provide a return current path, each converter controller being programmed to monitor the first power feed in the first transmission conduit and the second power feed in the second transmission conduit and, when the first power feed in the first transmission conduit and the second power feed in the second transmission conduit differ from one another, at least one converter controller modifying the power infeed from its corresponding power source to reduce the difference between the first power feed and the second power feed.