This is how the CCGT Ostrołęka power plant is being built

In 2024, the construction site of the gas-steam power plant in Ostrołęka was a place of intense work. Thanks to this, by 2025, the investment has reached a high level of advancement. This applies not only to construction work but also to design and procurement-logistics processes.

Kamil Kusier executive editor 01.02.2025, 09:33 Reading time: 2 min

Aerial view of a combined cycle gas power plant construction site with steel structures and cranes — fot. Energa

In brief

Construction of the CCGT Ostrołęka combined-cycle power plant reached an advanced stage after intensive work in 2024, Energa reported. The gas turbine arrived on site in early 2024 and was assembled by mid-year, as were the heat recovery boiler and cooling water pumps. Gassing of the nearly 28-kilometre supply pipeline from the Poland, Lithuania interconnector is complete, with occupancy permits granted in Podlaskie and Mazowieckie voivodeships. Pressure tests of key systems are scheduled for the first half of 2025, with the gas turbine's first firing and synchronisation with the National Power System in the second half.

Construction progress of the CCGT Power Plant in Ostrołęka

The combined cycle gas turbine (CCGT) power plant in Ostrołęka is a massive and complex investment and logistical undertaking, which was particularly evident in the past year. As Energa reports, key components and equipment were regularly delivered to the construction site, including the gas turbine, which arrived in early 2024 and was assembled by mid-year. Other transported elements included block transformers—responsible for increasing the generator's output voltage to a level suitable for electricity transmission—and the lubrication system for the plant's turbine set.

Major milestones achieved in 2024

Successful assembly of the entire turbine set, including the gas and steam turbines along with the generator.
Installation of the heat recovery steam generator and cooling water pumps.
Completion of the gasification process for the nearly 28 km-long gas pipeline, which will supply the CCGT unit with natural gas from the Poland-Lithuania interconnector.
The gas pipeline also received operating permits in both voivodeships it passes through (Podlaskie and Mazowieckie).

Key developments in 2025

The upcoming year will continue to see intense activity at the construction site. The final buildings of the power plant complex will be completed, enabling the installation of auxiliary systems, such as water and gas treatment stations.

First Half of 2025: Pressure tests of key systems, including the heat recovery steam generator.
Second Half of 2025: Equipment testing, including the critical "first ignition" of the gas turbine and synchronization with the National Power System.

Balancing energy supply and ensuring security

Ensuring energy security during the energy transition requires generation sources capable of balancing the National Power System as conventional, high-emission assets are phased out. In Poland, CCGT power plants serve as an interim solution. They offer high operational flexibility and produce half the emissions of coal-fired units. This makes them both more environmentally friendly and capable of responding quickly to fluctuations in electricity demand. Moreover, with proper modernization, these plants could use alternative fuels such as biomethane or hydrogen in the future.

Source: Energa / Gazeta Morska · Compiled by: Kamil Kusier