Spanish grid operator Red Eléctrica and regulator CNMC have launched real-time voltage regulation services, allowing renewable energy installations to provide dynamic grid support under a new regulatory framework.
Red Eléctrica has launched real-time, setpoint-based voltage regulation services, allowing renewable energy installations to provide dynamic grid support, according to data published on the Esios platform. The rollout follows the approval of Operational Plan 7.4 by the National Commission for Markets and Competition, which opened the door for renewable producers to participate in voltage regulation services in October.
The system went live on March 17, allowing production units to adjust reactive power in response to signals from the system operator. The model is based on real-time set points, allowing dynamic voltage control across the entire electrical grid.
Participation has steadily expanded. More than 100 production units have met the technical requirements to provide the service, while more than 50 installations are now actively providing voltage regulation. The rollout started in October with an initial 24 installations.
According to the CNMC, a total of 365 installations had signed up for the volunteer service as of mid-February 2026. Of these, 155 had undergone technical tests, of which 74 qualified successfully, representing a capacity of approximately 6.7 GW. The portfolio includes 32 PV installations, 17 wind farms, 12 combined cycle power stations, 10 hydroelectric power stations and three biomass power stations.
The new framework introduces operational incentives, including 10-minute ramping requirements and maximum dispatch priority. These measures aim to reduce technical limitations and improve the integration of variable renewable energy generation. The fee for the service is currently set at approximately €1/MVArh.
At the same time, a simplified model based on fixed voltage setpoints allows immediate participation of installations connected to both transmission and distribution networks, including assets commissioned before Order TED 749/2020. The approach expands allowable power factor ranges without penalties and allows operators to assess the economics of participation before moving to more advanced dynamic schemes. Authorities are also considering assigning an interim shipping priority to these facilities.
Looking ahead, Red Eléctrica is developing zonal markets for reactive energy capacity, with implementation planned for the fourth quarter of 2026. These markets are expected to roll out gradually, likely starting in southern, central and eastern Spain, depending on system needs and market conditions. The initiative marks a further step towards the integration of voltage regulation services into grid operations.
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