The end of autumn and the beginning of winter brought yet another serious test for Ukraine’s power system. In October, November and December, the enemy once again launched large-scale missile and drone attacks on generation, transmission and distribution facilities.
Emergency and unscheduled power outages were introduced in many regions of the country, while stabilization outage schedules changed throughout the day.
Yet despite the scale of the damage and peak winter demand, the system held. As of late December, the situation remains extremely difficult, but controlled. Ukraine’s energy sector is holding up thanks to equipment reserves, the rapid mobilization of repair crews, international support and flexible operational decisions.
How is stability being maintained under these new conditions? What risks remain? And why is even moderate stabilization not a reason for complacency?
What the Situation Looked Like After the Latest Strikes
The latest wave of attacks, which began in October, fundamentally changed the operating rhythm of the power system. Within a short period of time, dozens of facilities were hit, including in central, northern and eastern regions.
Several regions reported extensive damage to transformer substations, transmission lines and generation nodes. This led to cascading failures and made it necessary to impose large-scale consumption restrictions.
According to specialists, on some days the situation came close to critical, with the system being balanced literally on the edge. The actual deficit significantly exceeded forecasts, and without local generation reserves and accumulated equipment stocks, the risk of losing control over load management would have been high.
The situation became particularly difficult in the second half of November, when seasonal cooling added pressure and evening peak demand increased. It was then that warnings about possible outages lasting 12–16 hours were first voiced — and in some cases, such outages did become reality. However, a nationwide collapse was avoided.
A key role was played by the coordinated work of repair crews, as well as the use of flexible outage schedules, which made it possible to balance consumption without overloading individual sections of the grid. At the same time, these actions laid the groundwork for the stabilization that became visible in early December.
What Helped Prevent Collapse: Stabilizing Factors
Despite the intensity of the attacks and damage to key infrastructure elements, the power system was able to maintain resilience. This became possible thanks to several critically important factors.
Equipment reserves. Since the previous heating season, Ukraine has been actively building up strategic stocks of transformers, switching equipment and components for high-voltage lines. Much of this has been made possible by international support, including assistance from Germany, the European Investment Bank, the United States and the Baltic states. According to expert estimates, at the current intensity of attacks, these reserves may last for several months. These resources have made it possible to replace damaged components quickly and avoid prolonged blackouts.
Flexible load management. The introduction of adaptive outage schedules has helped reduce pressure on the grid during peak hours. This often causes frustration among consumers, as schedules may change daily. However, this very approach helps prevent emergency shutdowns and allows the system to be balanced in real time.
Mobility of repair crews. Energy workers are operating at a high pace, often under dangerous conditions. Regular drills, new safety protocols and the use of digital monitoring tools have significantly reduced response times. In some cases, only a few hours — or up to a day — pass between a strike and partial restoration of electricity supply.
Decentralized generation. The development of local solar and wind sources, generators and energy storage systems makes it possible to provide a minimum level of autonomous power supply for critical facilities and communities. This is especially important when large thermal power plants and combined heat and power plants are damaged.
Donor support. Funding from international partners is being directed not only to equipment procurement, but also to the construction of protective structures, such as anti-drone shelters for transformers. This is a new but extremely important area that reduces losses from attacks.
Why the Situation Remains Vulnerable
Despite visible stabilization, Ukraine’s energy sector remains vulnerable. The main reasons are the unpredictability of attacks and limited resources.
No one can accurately predict when and where the next strike will take place, or which facilities will be targeted. This makes long-term planning extremely difficult and forces the system to operate in a state of constant adaptation.
Some components — such as transformers and high-voltage reactors — take months to manufacture. If the enemy disables several key nodes at once, existing reserves could be depleted within weeks. This creates a systemic risk even with the current level of stockpiles.
Even when equipment is available from manufacturers, logistics remains a major challenge. Many supplies are delivered through Ukraine’s western border. Delays, bureaucratic barriers or logistical disruptions can complicate the timely replenishment of warehouses even without the direct threat of attacks.
It is also important to remember that Ukraine’s power grid consists of tens of thousands of kilometres of lines, hundreds of substations, generation facilities and load distribution algorithms. An attack on even one key node can trigger a chain reaction, especially during peak hours.
Finally, there is the human factor. Repair crews are working under severe stress, often under the threat of renewed shelling. The high pace of work and lack of rest are also factors that affect resilience in the long term.
All this means that even moderate stabilization cannot be considered a reliable safety margin. The system is holding, but it requires continuous support, protection and coordination with partners.
What Is Needed for Long-Term Resilience
Restoring stability after the latest strikes does not mean that the threat has passed. To reduce vulnerability in the long term, Ukraine needs to move from emergency response to systemic strengthening of the sector.
Among the key priorities are:
The development of distributed generation with capacities of 10 MW and above. During the years of war, many small generation facilities starting from 50 kW have been commissioned. A shift towards more powerful facilities would make it possible to supply critical infrastructure, communities and industry under conditions of deficit or unstable power supply. This would reduce dependence on centralized generation, which remains the main target of attacks.
Creating domestic equipment production. Establishing domestic production of transformers, high-voltage equipment and protection systems would increase flexibility and reduce recovery times.
Continuing donor programmes and targeted procurement. International assistance remains critically important. The supply of transformers, financing of protective structures and funding for restoration works allow Ukraine to respond rapidly to the consequences of attacks.
Stimulating cogeneration. Under unstable electricity supply conditions, cogeneration units can become the basis of local energy independence. This requires updated tariff policy, simplified grid connection procedures and targeted support for facilities ready to invest in heat and electricity generation at the same time.
Conclusions: Between Risks and Reserves
Ukraine entered the winter from a stronger position. Timely repairs, accumulated stocks of critical equipment and international support helped the system withstand a series of attacks.
However, every new week is another test of resilience. The enemy continues to change tactics, while the unpredictability of attacks complicates planning. Under these conditions, speed and flexibility remain the energy sector’s main tools.
It is critically important to combine emergency measures with long-term solutions: stimulating local generation, developing domestic equipment production, attracting investment and introducing new technologies.
Stabilization is not the end of the work. It is only a window of opportunity. Ukraine’s energy sector is holding — but it still needs support to get through the winter without blackouts.
Author: Yevhen Korf, Director of NVP ENERGO-PLUS LLC.
Source: The Page, Енергобізнес, “Кременчуцька газета”.
