Transmission Lines
Overhead and underground high-voltage lines explained at a safe systems level.
Where this fits
Overhead and underground high-voltage lines explained at a safe systems level.
Core system ideas
Overhead conductors use towers or poles and surrounding air as part of the insulation system.
Underground or submarine cables use engineered insulation and thermal designs and have different repair and cost characteristics.
Route length, voltage, conductor characteristics, weather and system loading influence performance.
Interfaces and tradeoffs
Transmission is a network problem: removing or loading one element can redistribute flows across many others. Planning and operation therefore rely on coordinated models, protection and utility procedures.
What organizations measure
Loading, conductor temperature, losses, outages, condition and transfer capability.