Invisible systems
Power grid
Generators, wires and substations work as one connected system.
Transmission lines move electricity over distance. Substations and transformers help change voltage for the next part of the network.
A closer look
The picture, in three parts.
Generate
Power enters the network.
Transmit
High-voltage lines carry it over distance.
Distribute
Local networks deliver electricity to users.
Where could this take you next?
Sources & further reading +
Short explanations, grounded in published sources. Follow the originals for depth and context.
Sources checked: 10 September 2026. Visuals are illustrations, not documentary evidence.
Our approach to sources and corrections