DETERMINING AN OPERATIONAL LIMIT OF A POWER TRANSMDETERMINING AN OPERATIONAL LIMIT OF A POWER TRANSMISSION LINE ISSION LINE

摘要

In a method, computer program and system for determining an operational limi t 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 regardi ng line parameters.