Electricity Transmission Systems

Where this fits

How high-voltage networks move large amounts of electrical power across long distances.

Core system ideas

Transmission networks connect major generation, load centres and neighbouring systems.

Higher voltages reduce current for a given power transfer and therefore reduce resistive losses over long distances.

Lines, substations, transformers, protection, communications and control centres operate as one network.

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

Line loading, transfer capability, losses, voltage, stability and outages.