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GPZ Wigry: information about the electrical substation

Last updated: 11 August 2026

GPZ Wigry is an electrical substation in the Suwałki area, in north-eastern Poland (Podlaskie Voivodeship). The station plays an important role in developing the region's electricity grid and in connecting new generation sources, including RES installations.

Technical data

Location

GPZ Wigry

220/110 kV, Dubowo Pierwsze, Suwałki municipality

The station is being built within the Suwałki Special Economic Zone, directly alongside the planned underground 220 kV cable line to the Lithuanian border, part of the second Poland-Lithuania interconnection (Harmony Link).

Significance of GPZ Wigry for the region and RES development

GPZ Wigry, together with the Ełk Bis station (400/110 kV) currently being expanded, forms part of a broader PSE investment strengthening the transmission and distribution grid in north-eastern Poland. The new infrastructure is intended to improve regional supply security and enable the connection of new energy sources to the grid, including wind farms, photovoltaic installations, and energy storage.

The Suwałki and Ełk region has some of the best wind conditions in Poland, which, combined with the expanding grid infrastructure, makes it an attractive direction for new RES projects.

Project background and route

PSE and the Lithuanian operator Litgrid originally planned the Poland-Lithuania connection as a subsea cable together with DC converter stations. The tenders for this variant were cancelled in April 2023 due to a significant rise in the cost of the cable and converter stations. They were replaced by a land-based variant: a double-circuit 220 kV AC line running from the Ełk Bis station to a new Gižai station in Lithuania. A feasibility study confirming that the combined systems would perform equally well as with a subsea connection was completed in June 2024 by the Gdańsk branch of the Institute of Power Engineering.

The roughly 100 km, 220 kV cable line on the Polish side will run through the municipalities of Ełk, Kalinowo, Raczki, Suwałki (both the city and the surrounding municipality), and Szypliszki, mostly following the corridor of the S61 Via Baltica expressway. The investment also includes the modernisation of the existing roughly 100 km overhead 220 kV Ostrołęka-Ełk line and the construction of a new GPZ Norki station in the Kalinowo municipality. The project is co-financed with EU funds under the Connecting Europe Facility (CEF).

Entities applying for connection to GPZ Wigry

Under Article 7(8l)(1) of the Energy Law, PSE S.A. publishes a register of entities applying for connection of sources to the National Transmission Grid. Below is a summary of the entries relating to the GPZ Wigry connection point (as of 30 June 2026):

Source: PSE S.A., "Register of entities applying for connection of sources to the National Transmission Grid," as of 30 June 2026.
No.Injected capacity [MW]Offtake capacity [MW]Installation typeApplicantRegistered officeConnection conditions dateConnection agreement dateConnection deadline
192017.5ODBnot subject to disclosurenot subject to disclosure29.08.202430.06.202630.12.2031
330145.21.6SD (FW)not subject to disclosurenot subject to disclosure26.03.2025n/an/a
511236.42640PVNeo Energia Przykona III Sp. z o.o.Warsaw03.09.2025n/an/a
513174.24174.24MEEnot subject to disclosurenot subject to disclosure08.09.2025n/an/a
63692.41.5SD (FW)not subject to disclosurenot subject to disclosure22.12.2025n/an/a
64314065PV+MEEPolskie Farmy PV2 Sp. z o.o.Warsaw14.01.2026n/an/a

Installation type abbreviations: FW, wind farm; PV, photovoltaic installation; MEE, electricity storage facility; PV+MEE, hybrid PV-with-storage installation; SD, connection to the distribution network (source type in brackets); ODB, offtaker. An entry marked "not subject to disclosure" means the applicant's details are not covered by the publication requirement under the Energy Law.

As part of the Ełk Wind Platform offer

We hold secured, transferable grid connection conditions for GPZ Wigry with a capacity of 94 MW, fully transferable to the buyer's project. See package details →

Frequently asked questions

What is GPZ Wigry?

GPZ Wigry is a 220/110 kV electrical substation being built by Polskie Sieci Elektroenergetyczne S.A. in the Suwałki municipality, as part of the Harmony Link project, the second electrical interconnection between Poland and Lithuania.

When will the Wigry station be built?

The siting decision for the station was issued by the Podlaskie Voivode on 21 July 2026. Construction is planned to start in 2027.

What role does GPZ Wigry play in regional RES development?

The station is intended to enable the connection of new energy sources, including RES installations, to the electricity grid of north-eastern Poland, and to support the development of the Suwałki Special Economic Zone.

How many entities are applying for connection to GPZ Wigry?

According to the PSE S.A. register (as of 30 June 2026), six entries relate to the Wigry connection point, covering photovoltaic installations, wind farms, energy storage, and hybrid PV-with-storage installations.

Why was the Poland-Lithuania connection changed from a subsea to a land-based route?

The original subsea variant, together with DC converter stations, was cancelled in April 2023 due to a significant rise in costs. It was replaced by a land-based variant, a double-circuit 220 kV AC line running through Polish territory, of which GPZ Wigry is a part.

Sources: inwestycje.pse.pl, Poland-Lithuania Connection (Harmony Link), inwestycje.pse.pl, Ełk Bis station with a siting decision for expansion, pse.pl, PSE and Litgrid to cooperate on Harmony Link as a land-based connection, gramwzielone.pl, PSE to build a cable line important for Poland and Lithuania, rynekinfrastruktury.pl, PSE closer to delivering Harmony Link, PSE S.A., Register of entities applying for connection of sources to the National Transmission Grid (as of 30 June 2026).