A high concentration of data centres could create local voltage problems that develop into frequency disturbances across the wider power system, according to a new report from the European transmission system operators, Entso-EData centres could create challenges for grid operation and may be less flexible than many had expected. A cascade of technical constraints, business realities and market participation barriers progressively narrows the actual flexibility these facilities can offer to the system, the European TSOs warn in a new report. Foto: ShutterstockEnergy SecurityPublished 12 May 2026, 05:52Updated 14 May 2026, 14:21