Determining an operational limit of a power transmission line
AssigneeABB Schweiz AG
InventorsMarek Zima, Christian Rehtanz, Mats Larsson
Life of this patent
Estimating the term…
Abstract
In a method, computer program and system for determining an operational limit of a power transmission line, time-stamped current phasor information and voltage phasor information for a first end and a second end of the line are determined, an ohmic resistance of the line is computed from the phasor information, and an average line temperature is computed from the ohmic resistance. This allows to determine the average line temperature without dedicated temperature sensors. The average line temperature represents the actual average temperature and is largely independent of assumptions regarding line parameters.
Claims9
A method for determining an operational limit of a power transmission line, comprising the steps of
- determining time-stamped current phasor information and voltage phasor information for a first end and a second end of the line,
- computing an ohmic resistance R of the line from the phasor information,
- computing an average line temperature T1 from the ohmic resistance R.
A system for determining an operational limit of a power transmission line from time-stamped current phasor information and voltage phasor for a first end and a second end of the line, the system comprising:
- a data processing device and means for
- computing an ohmic resistance R of the line from the phasor information, and
- computing an average line temperature T1 from the ohmic resistance R.
Dependencies are inferred from the claim text.