Ukraine reported a generation surplus. Damaged grid routes still caused shortages

Critical substations determine usable output

The problem had developed over several attacks. DiXi Group recorded Russian strikes against generation, transmission and distribution facilities on 27, 30 and 31 October, including the loss of all 330 kV lines connected to the Slavutych substation. On 3 November, Russia targeted a substation critical to the Khmelnytskyi nuclear plant. Ukraine’s nuclear plants then reduced output because damaged networks could not accept their normal generation.

Russia intensified this campaign during the night of 6–7 November. Ukrainian officials reported 172 drones and 36 ballistic missiles, although those totals have not been independently verified. The strikes damaged energy facilities and interrupted electricity, heat and water for civilians. Russia’s Defence Ministry claimed it attacked military-industrial, energy and transport targets. That claim does not alter Russia’s responsibility for attacking Ukraine or the documented effects on civilian services.

Imports face a border limit and internal bottlenecks

The International Energy Agency says the Ukraine–Moldova electricity block can import up to 2,450 MW. Imports helped Ukraine through the previous winter, but the agency concludes that this ceiling cannot close the expected winter gap. The volume available at the border also differs from the volume that damaged internal lines can deliver to a particular city.

This distinction matters for European support. The IEA calls for closer coordination with Moldova and Romania as drought constrains regional electricity conditions. Cross-border purchases can cover scarcity hours and reduce pressure on Ukrainian generation. They still enter a network in which eastern demand centres may sit behind damaged or congested transmission routes.

“Electricity produced at a nuclear plant or imported across the western border does not prevent a Kyiv shortage when damaged substations restrict delivery.”

Local equipment needs faster connections

Ukraine has added about 0.4 GW of distributed gas generation, alongside battery storage. Some donated or purchased units take months to connect. The IEA also found that few local generators and batteries can operate independently when the surrounding grid is cut. Equipment installed in a city therefore does not automatically keep a hospital, water system or heating network running during separation.

The agency identified 18 priority substations that support nuclear output, cross-border trade or restarting the grid after a blackout. Many remain partly or wholly unprotected. Ukraine and its partners can shorten outages by protecting those sites, positioning transformers and switchgear near likely damage points, funding installation as well as delivery, and expanding repair crews. Air defence remains necessary because faster restoration cannot stop Russia from striking repaired equipment again.

Zelenskyy said Ukraine was adding repair teams and receiving equipment from Germany, Spain and Slovakia. He also criticised Kyiv’s backup arrangements, particularly at the water utility. That example shows why local planning must identify the exact loads that require independent power. A citywide capacity total cannot show whether pumps, district heating and communications can keep operating through a transmission failure.

The 7 November shortages occurred because Russia damaged delivery routes while Ukraine still reported enough electricity at national level. Imports, protected substations, repair stocks and island-capable local generation can reduce the duration and geographic reach of similar outages this winter. Published transfer-capacity data after major strikes, regional load-shedding records, connection dates for distributed units and tests showing which essential services can run independently would reveal whether those measures are closing the delivery gap.