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“ABB” High Voltage Switchgear in Alytus

“Conresta” has implemented an exceptional strategic electricity project and completed “LitPolLink's” electricity interconnections with neighboring Poland. Thus the Baltic and Western European electricity infrastructures were connected. The company was entrusted with the design of the Alytus High Voltage DC Interface Station and the 400 kV open switchgear.

Finished
Contractor

JSC "Conresta"

Client

PLC "ABB"

Country

Lithuania

Architect / Designer

JSC "SWECO Lietuva"

01

Building area:

1662,91 m2

02

Investment:

7,3 M euros

03

Construction period:

2014 05 29 – 2015 12 31

“Conresta” has won a contract tender for the Swedish energy technology company “ABB”. The value of the project is 7.3 million euros. It is a part of the “PSE Operator S.A.” and “Litgrid’s” commitment to install a new electricity transmission link between Poland and Lithuania. “Conresta” was entrusted with the construction of two special purpose buildings with a total area of 1662.91 sq. meters. The company has also carried out the infrastructure development work, including bypass, connecting road construction, engineering network installation, etc.

The high voltage DC converter station was built in Alytus. The length of the 400 kV overhead transmission line in the territory of Lithuania is as much as 51 km. The newly built 500 MW DC insert has interconnected power transmission systems with the new 400kV substation. In addition, the substation on both sides of the interconnection was further upgraded: 330/110 kV substation in Lithuania, Alytus, and 400/110kV substation in Poland, Ełk Bis. They distribute the electricity supplied through the networks of both countries. General contracting and construction company “Conresta” was responsible for the construction of two special purpose buildings.

Project

Risks:

  • High groundwater
  • Complicated terms
  • Work near high voltage installations
  • High risk environment

Materiality:

  • Materials meeting special requirements
  • Materials adapted for use with electricity

Innovations:

  • Floors of different levels
  • Special electrically conductive bolts

Ecology:

  • Exclusive sorting
  • Strict ecology requirements
  • Each stage is preceded by ecological studies

Special Features:

  • A special level of security
  • An exceptionally strict requirement for work safetyi
  • Strategic project for Lithuania
04

Construction workers:

250

05

Length of 400 kV overhead transmission
line in the territory of Lithuania:

51 km

06

Input power DC:

500 MW

During the planning and construction of the project, special attention was paid to nature and ecological care. Prior to each construction phase, the whole area underwent research by ecologists and conservationists to ensure environmental protection and preserve rare, endangered species of flora and fauna.

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