Dynamic line rating (DLR) of overhead transmission lines

A method of determining a distributed line rating (DLR) for overhead transmission lines, the method comprising:

• configuring a distributed fiber optic sensor system (DFOS) to monitor temperature via distributed temperature sensing (DTS) and monitor wind speed, wind direction, and solar radiation measure via distributed vibration sensing (DVS);
• operating the distributed fiber optic sensor system (DFOS) to monitor environmental conditions proximate to the overhead transmission lines;
• determining a time-varying weather and current;
• constructing an artificial neural network (ANN) model for overhead transmission line conductor temperature prediction;
• and
• using a predicted temperature, determining a current carrying capacity of the overhead transmission line conductor;
• wherein wind speed, wind direction, and solar radiation measurements are made by an acoustic modem configured to provide the measurements to the DFOS via DVS;
• and
• wherein air density is determined according to the following:
• ρ
• f
• =
• 1
• .
• 2
• ⁢
• 9
• ⁢
• 3
• -
• 1
• .
• 5
• ⁢
• 2
• ⁢
• 5
• *
• 1
• ⁢
• 0
• -
• 4
• *
• H
• e
• +
• 6
• .
• 3
• ⁢
• 7
• ⁢
• 9
• *
• 1
• ⁢
• 0
• -
• 9
• *
• H
• e
• 2
• 1
• +
• 0
• .
• 0
• ⁢
• 0
• ⁢
• 3
• ⁢
• 6
• ⁢
• 7
• *
• T
• film
• Where:
• He elevation of the conductor above sea level;
• Tfilm the average temperature of the boundary layer,
• T
• s
• +
• T
• a
• 2
• ,
• Ts conductor surface temperature;
• and
• Ta ambient air temperature.