Romania aggregates telecom backup batteries into virtual power plant for grid balancing

Aggregating distributed telecom infrastructure for grid flexibility

Romania is initiating trials to convert existing telecommunications backup batteries into a distributed virtual power plant. By aggregating stationary battery assets across telecommunications towers and switching sites, control software can provide revenue-generating balancing services to the national power grid without jeopardising primary emergency backup functionality.

Network impacts on distribution substations and transformer fleets

Using secondary backup assets for grid balancing represents an operational shift in distributed energy resource management. For distribution system operators and primary substation engineers, aggregating widespread backup batteries creates decentralised power injection points that interact directly with local distribution switchgear and medium-voltage assets. Traditional radial distribution network designs assume predictable load profiles at distribution transformers. Dynamic charging and discharging cycles triggered by frequency regulation signals can introduce dynamic voltage fluctuations and phase imbalances across local feeders.

Substation protection systems must accommodate transient reverse power flows and high-frequency switching disturbances caused by aggregated battery inverters. Furthermore, monitoring transformer thermal stress becomes essential when dispersed backup systems simultaneously transition from discharging power to grid-recharging mode, producing sudden step-changes in current demand at feeding substations. Engineers managing power transformers must assess the cumulative impact of these rapid load variations on dissolved gas levels and tap changer operation, as frequent voltage swings increase mechanical tap movement.

What this means for asset owners in the Balkans and the Black Sea region: distribution system operators and industrial plant managers in Romania must evaluate how aggregated battery operations alter feeder thermal limits and power quality at regional substations. Managing simultaneous battery recharging cycles requires protection relay settings and monitoring protocols to be updated for bidirectionality, helping asset managers mitigate transformer insulation degradation and avoid nuisance protection trips.