Device, system, and method for double-circuit transmission systems
AssigneeHitachi Energy Switzerland AG
InventorsNeethu GEORGE, OD NAIDU
Life of this patent
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Abstract
A device is provided that is suitable for use with a double-circuit power transmission system having a first line and a second line. The device comprises an interface to receive a current measurement for the second line. The device comprises at least one processing module operative to estimate a first zero-sequence current in the first line based on a second zero-sequence current, and determine an apparent impedance based on the estimated first zero-sequence current.
Claims20
A device for use with a double-circuit power transmission system having a first line and a second line, the device comprising:
- an interface to receive a current measurement for the second line;
- and
- at least one processor operative to
- calculate a second zero-sequence current in the second line based on the current measurement,
- estimate a first zero-sequence current in the first line based on the second zero-sequence current, and
- determine an apparent impedance based on the estimated first zero-sequence current.
A method, comprising:
- estimating, by a device, a first zero-sequence current in a first line of a double-circuit transmission system, the first zero-sequence current being estimated based on a second zero-sequence current in a faulted second line of the double-circuit transmission system;
- and
- determining, by the device, an apparent impedance based on the estimated first zero-sequence current.
Dependencies are inferred from the claim text.