Ukraine is intensively preparing for attacks on the energy sector, the Financial Times reports.

The publication says that small substations across Ukraine have been protected with concrete block walls, as well as gabions and cylindrical cages filled with stones or sand. This at least saves from falling debris.

Infrastructure elements that do not require ventilation were moved underground. Spare parts for repairing substations and transformers are stored abroad and can be ordered quickly.

The FT writes that Russian attacks with missiles and drones have been increasingly targeting energy infrastructure in recent weeks, which was not the case all summer.

Prime Minister Denys Shmyhal told the FT that Ukraine has become "much more prepared" for such attacks than last winter. He noted that the defense is still "not 100 percent effective" but works "in 80-90 percent of cases," especially against drones.

According to him, more than 40% of Ukraine's electricity infrastructure was destroyed a year ago, but "we have repaired most of this damage." Steps have also been taken to decentralize the power system, so that damage in one place is less likely to affect other regions. Ukraine also now has more air defense systems.