A power grid is the interconnected network of generation, transmission and distribution infrastructure that delivers electrical power from producers to consumers. It balances supply and demand in real time across high-voltage transmission lines, substations and lower-voltage distribution networks. Modern grids increasingly integrate renewable generation and digital controls to maintain stability and reliability.
Overview
- Generation, transmission and distribution stages move power from plants to end users.
- Grid operators continuously balance supply and demand to keep frequency and voltage within limits.
- Substations step voltage up for efficient long-distance transmission and down for local distribution.
- Renewable integration and storage are reshaping how grids are planned and controlled.
Key aspects
- Generation — Conventional and renewable sources feed power into the network at varying scales and profiles.
- Transmission — High-voltage lines carry bulk power over long distances with low losses.
- Distribution — Lower-voltage networks deliver power to homes, businesses and facilities.
- Balancing and control — Real-time matching of supply and demand maintains frequency, voltage and stability.
Applications
- Supplying electricity to homes, industry and commercial buildings.
- Powering large data centres and compute infrastructure.
- Integrating distributed and renewable generation via smart-grid controls.
- Providing the energy backbone for electrified transport and heating.