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Ukraine's energy sector is a key battleground in the war with Russia

Summary

The Ukrainian energy sector has proved to be a key element in the struggle for its sovereignty against Russian aggression.

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Editor's note:

This report is the fifth in a series on “ Europe’s energy transition: Balancing the trilemma ” produced by the Brookings Institution in partnership with the Fundação Francisco Manuel dos Santos.

Soviet legacy and modern challenges

Most of the Ukrainian energy system was built during Soviet times, when Ukrainian and Russian engineers collaborated to construct transmission networks and power plants.

The Ukrainian energy sector was designed to be oversized with significant redundancy in order to meet huge Soviet-era industrial demand as well as to make it more resilient to a future world war.

Following the dissolution of the USSR, Ukraine began its challenging path to true independence.

For years, the country was politically torn between East and West, and in terms of energy, it relied on its Soviet legacy.

Successive governments exploited the aging system by building their support on promises of consistently cheap energy.

This resulted not only in delayed reforms and a lack of investment, but above all in continued dependence on Russian energy sources.

Aradical change did not occur until 2014, when Ukrainians overthrew the pro-Russian president, Viktor Yanukovych.

In the decade since then, Ukraine has pursued a policy of European Union (EU) integration with determination and without interruption.

Its aspiration to join the EU and NATO is even enshrined in the constitution.

That meant undertaking changes in the energy sector.

In March 2014, Ukraine signed an association agreement with the EU, putting it on the path to aligning its regulations and laws with European standards.

This is particularly important for Ukraine, given its aging power plants and networks.

Without reforms, investors would have been discouraged, and Ukraine could have faced a power deficit in a few decades, even without war, due to the deteriorating condition of its coal-fired power plants.

The real prospect of an improvement in the quality of life and development of Ukraine through integration with the EU and NATO was unacceptable to Russia, which first annexed Crimea and covertly attacked the Ukrainian Donbas, before launching a full-scale invasion of Ukraine on February 24, 2022.

Russia’s in-depth knowledge of the Ukrainian power system, dating back to the Soviet Union, was used to carry out a well-planned operation to cut off electricity to Ukrainians.

The aim was to break the morale of Ukrainians to continue defending themselves and to collapse the economy so that it could not support the Ukrainian military effort.

Ironically, however, the size of the energy system, which had been scaled up in case of war, and the enormous Western support, unexpectedly ensured its resilience to Russian attacks.

Ukraine’s energy sector before 2022

Ukraine’s energy sector had historically been marked by a lack of transparency and dominated by monopolies, creating opportunities for corrupt officials and oligarchs to profit, while also acting as a means for Russian influence.

The sector also remained structurally inefficient: high energy use stemmed from outdated technologies and cross-subsidization that kept household prices low at industry’s expense.

Although both overall energy consumption and the entire economy’s energy intensity have fallen significantly between 1990 and 2022, Ukraine remains far behind European energy efficiency standards.

Figure 1

Figure 1
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Source: Our World in Data

Power sector

Ukraine’s power system relies primarily on nuclear energy, with coal and gas together accounting for about a quarter of generation and renewables accounting for around 11%.

The remainder was supplied by combined heat and power (CHP) plants—mostly coal-fired.

Figure 2
Electricity production in Ukraine in 2022 (Pie Chart)

From the perspective of the system’s operation, nuclear power plants ensured a stable supply of cheap electricity, but their downside was their low flexibility—their production does not follow demand but remains at a constant level.

To cover daily fluctuations in demand, the most flexible power plants, primarily hydroelectric, are used, with coal-fired power plants playing a lesser role.

Renewable sources played a marginally important role before Russia’s invasion of Ukraine.

Until 2022, Ukraine’s power grid operated in synchronization with the larger Russian-controlled IPS/UPS (Integrated Power System/Unified Power System), to which it was connected via interconnectors with Belarus and Russia.

Its headquarters were located in Moscow, and Russia was responsible for providing Ukraine with support in the event of system difficulties.

This also hampered electricity trade between Ukraine and its western neighbors.

To make this possible, in 2002, Ukraine created the so-called Burshtyn Energy Island —an area synchronized with its western neighbors.

This meant that there were effectively two systems within one country, which also constrained internal energy exchange.

Figure 3

Figure 3
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Source: Lukas Feldhaus, Kirsten Westphal, Georg Zachmann, “Connecting Ukraine to Europe’s Electricity Grid, Stiftung Wissenschaft und Politik, 2021, https://www. swp-berlin. org/10.18449/2021C57/

As a result of this structure, Ukrainian electricity trade with Western partners was marginal, and connections with EU countries had no impact on the system’s security, energy pricing, or coverage of any potential deficits.

Trade with Russia and Belarus, on the other hand, was suspended (with a brief interruption) due to its corrupt nature and security issues.

Natural gas and liquid fuels

Historically, Ukraine and Russia have been closely linked by gas agreements.

Although Ukraine has natural gas production, it only covered about two-thirds of its demand, which, before Russia’s full-scale invasion, amounted to approximately 30 billion cubic meters (bcm) annually.

The rest of Ukraine’s gas supply was imported from Russia, and Ukraine had no alternatives to these supplies—its western neighbors were also dependent on Russian gas.

This allowed Moscow to use gas agreements for political purposes.

Notable episodes include the 1999 transfer of strategic bombers to Russia for gas debts and the 2010 extension of the Russian Black Sea Fleet’s stay in Crimea to 2042 in exchange for a gas “discount” (actually, prices were higher than for some European consumers).

The turning point came with Russia’s illegal annexation of Crimea and the beginning of its proxy war in the Donbas in 2014.

Ayear later, Ukraine stopped importing gas from Russia, relying entirely on contracts with western traders, but physically, some of the imported natural gas was still Russian.

At the same time, thanks to the ongoing diversification of supplies in Poland, where a liquified natural gas (LNG) terminal was built in the same year, it became possible to import non-Russian molecules as well—for example, U.S.

LNG.

In 2021, on the eve of Russia’s full-scale invasion, Ukrainian natural gas production was around 20 bcm per year against demand of around 27 bcm, with the gap covered by approximately 6.85 bcm of imports (via reverse‑flow from the EU).

Ukraine was also important to Russia as the main transit country for Russian gas exports to Europe.

The Ukrainian transit pipeline was operational until the end of 2024, even though Ukraine had had no contract for Russian gas imports since 2015.

The total capacity of the Ukrainian transmission network was around 140 bcm per year.

For Ukraine, in turn, the transit of Russian gas was an important source of revenue, amounting to between $1 billion and $1.7 billion per year in 2020-2024.

It continued until the agreement expired at the end of 2024.

Figure 4

Figure 4
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Source: Euromaidan Press

Ukraine’s dependence on Russia was also evident in the liquid fuels market, including for supplies of aviation fuel and diesel oil, which are particularly important for the army.

Before the Russian invasion, about two-thirds of domestically consumed liquid fuels came from Russia or Belarus, giving the Kremlin leverage, through licensing and control over supplies, to influence prices and potentially block deliveries.

This instrument was used immediately after the first Russian forces entered Ukraine, when all liquid fuels supplies were halted, and attacks on Ukrainian refineries began.

Post-2014 energy reforms

Russia’s escalating political and economic pressure against Ukraine, culminating in hybrid warfare from 2014 to 2022, pushed Kyiv to undertake genuine energy-sector reform.

Between 2014 and 2017, Ukraine created the first comprehensive legal framework for competitive gas and electricity markets aligned with the European Union’s rules.

It strengthened consumer protection and security of supply and began preparing for synchronization with the European electricity network.

Reverse-flow projects enabled Ukraine to stop buying gas directly from Gazprom (the largest Russian state-owned gas production company) in 2015, and Naftogaz (the largest Ukrainian state-owned energy company) later won a landmark Stockholm arbitration case, securing over $2.5 billion based on unjust 2009 contracts between the two companies.

Ukraine also started replacing Russian-made nuclear fuel rods with those made by Westinghouse Sweden, making Ukraine’s nuclear sector independent from its eastern neighbor.

The pressures of war, economic struggles, and the International Monetary Fund’s demands reinforced Ukraine’s EU-aligned energy reforms: un

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