Electricity & grid
The largest real-time system ever built. The grid carries energy from generation to use, balancing supply and demand by the second — with little bulk storage. Its transformation: integrating variable, decentralized generation while holding frequency and stability.
The main families
EHV, substations, HVDC, interconnectors
Extra-high-voltage lines, substations, HVDC links for long distances and offshore, cross-border interconnectors pooling generation at continental scale.
Networks, substations, smart metering
Medium- and low-voltage distribution networks, substations, smart meters. This is where rooftop solar, EV chargers and prosumers connect.
Dispatching, balancing, ancillary services
Control centres, real-time supply/demand balancing, markets (spot, balancing) and ancillary services (frequency control, reserves) that keep the grid stable second by second.
Key challenges
- Real-time balance — frequency (50/60 Hz) must be held by the second: inertia, primary and secondary control, reserves — electricity is not stored in bulk.
- Renewable integration — variable, decentralized generation, congestion management, grid codes and fault ride-through become structural.
- Substation digitalization — IEC 61850 digital substations, GOOSE, synchrophasors (PMU) and automation: more observability, but a wider digital surface.
- Cybersecurity (critical infrastructure) — the grid is a strategic target: segmentation, IEC 62443, NIS2 — the 2015 Ukraine attack proved a blackout can be triggered remotely.
- Smart grid & flexibility — demand response, vehicle-to-grid (V2G), storage, microgrids and prosumers turn the grid from one-way into a two-way exchange.
See also
Grid-specific standards
- IEC 61850 — Substation automation: information model, GOOSE, synchrophasors (PMU).
- IEC 60870-5 / DNP3 — SCADA telecontrol between control centres and substations/equipment.
- IEC 61970 / 61968 (CIM) — Common Information Model (CIM): data exchange between grid systems (EMS, DMS, market).
- IEC 61000 — Electromagnetic compatibility and power quality (harmonics, voltage dips).
- ENTSO-E grid codes — Connection and ride-through requirements for generators and consumers.
Related standard pages on IndustryHub
Major players
Transmission operators
RTE, National Grid, TenneT, 50Hertz, Terna, Red Eléctrica.
Grid equipment
Hitachi Energy, Siemens Energy, GE Grid, Schneider Electric, Nexans.
HVDC & FACTS
Hitachi Energy, Siemens Energy, GE Vernova, Prysmian (câbles).
Grid & market software
GE Vernova (GridOS), Siemens (Spectrum Power), AspenTech OSI, ETAP.
Landmark facts
| Fact | Year | Location | Lesson |
|---|---|---|---|
| Northeast blackout | 2003 | USA / Canada | A line contacting trees and a monitoring bug triggered a cascade cutting power to 55 million people. Made NERC reliability standards and vegetation management mandatory. |
| Ukraine grid cyberattack | 2015-2016 | Ukraine | First blackout caused by a cyberattack (BlackEnergy): remote takeover of substation breakers. Put OT cybersecurity (IEC 62443) at the heart of grid operation. |
| Continental grid split | 2021 | Europe | The synchronous European grid split into two frequency zones for an hour after a cascading fault. A reminder of the fragility of continental synchronization and the value of reserves and inertia. |