Control of voltage source converters
AssigneeGeneral Electric Technology GmbH
InventorsRobin Gupta, Carl Barker, Robert Whitehouse, Andrzej Adamczyk
Life of this patent
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Abstract
A method and apparatus for controlling a fault blocking voltage source converter apparatus which is, in use, connected to an AC system and a DC system for power transmission, in the event of a DC side interruption operating the voltage source converter apparatus after identification of a need for a DC side interruption based on a voltage order, so as to extract at least some electrical energy stored in the connected DC system to the voltage source converter apparatus.
Claims20
A method of controlling a fault blocking voltage source converter apparatus which is, in use, connected to an AC system and a DC system for power transmission, the method comprising:
- Identifying a need for a DC side interruption;
- after the identification of the need for a DC side interruption, operating the fault blocking voltage source converter apparatus based on a DC voltage order;
- generating the DC voltage order based on DC current flow, the generated DC voltage order having a polarity that is opposite to a polarity of the DC current flow;
- and
- extracting, through the operation of the fault blocking voltage source converter, at least some electrical energy stored in the connected DC system through the fault blocking voltage source converter apparatus to the connected AC system.
A controller for a fault blocking voltage source converter apparatus connected, in use, to an AC system and a DC system for power transmission, the controller being configured to:
- identify, based on a voltage order, a need for a DC side interruption;
- after the identification of the need for a DC side interruption, operate the fault blocking voltage source converter apparatus based on a DC voltage order;
- generate by a DC voltage order generating module the DC voltage order based on DC current flow, the generated DC voltage order having a polarity opposite to a polarity of the DC current flow through the fault blocking voltage source converter;
- and
- extract, through the operation of the fault blocking voltage source converter, at least some electrical energy stored in the connected DC system through the voltage source converter apparatus to the connected AC system.
Dependencies are inferred from the claim text.