Renewables
The sector reshaping the electricity mix: solar, wind, hydro and storage. The technical challenge is no longer to generate, but to integrate variable, decentralized production into a grid designed for dispatchable plants — without degrading stability.
The main families
Photovoltaics
Ground-mount and rooftop plants, inverters, performance monitoring (IEC 61724), commissioning (IEC 62446). Large-scale O&M and cleaning.
Onshore & offshore
Turbines on SCADA (IEC 61400-25), wind forecasting, remote O&M, complex offshore access. Repowering of ageing farms.
Dams, pumped hydro, batteries, H₂
Battery storage (BESS) and pumped-hydro, green hydrogen. Fast response for ancillary services.
Key challenges
- Intermittency & forecasting — output depends on sun and wind; forecasting and demand-side management become as important as installed capacity.
- Grid integration — grid codes, fault ride-through, ancillary services (synthetic inertia, frequency control) delivered by power electronics.
- Storage — batteries (BESS), pumped hydro, hydrogen: absorb surplus, deliver at peak, stabilize frequency.
- Distributed-asset cybersecurity — thousands of connected inverters and turbines: a broad attack surface, remote access to secure (IEC 62443).
- O&M & repowering — predictive maintenance (vibration, drone), asset management (ISO 55000), replacing end-of-life farms.
Key technologies
Standards & references
Beyond the standards below, the sector relies on the IEC 61400 series (wind), IEC 61724 / 62446 (PV monitoring and commissioning) and ENTSO-E network codes.
Major players
Developers & operators
Ørsted, Iberdrola, EDF Renouvelables, NextEra, RWE, Engie.
Wind
Vestas, Siemens Gamesa, GE Vernova, Goldwind, Nordex.
Solar & inverters
First Solar, JinkoSolar, Trina, LONGi · SMA, Sungrow, Huawei.
Storage
Tesla, Fluence, BYD, CATL, Wärtsilä.
Landmark facts
| Event | Year | Location | Lesson |
|---|---|---|---|
| South Australia blackout | 2016 | Australia | A storm cut lines; wind-farm protection settings tripped them in cascade, causing a statewide blackout. Drove ride-through requirements and the Hornsdale big battery. |
| Hornsdale response | 2017 | Australia | World's largest battery at the time (Tesla): proved storage can provide frequency regulation in milliseconds where a thermal plant takes minutes. |