Modernisation of Byczyna – Jamki and Byczyna – Koksochemia 220 kV line

The route of the line runs through the area of the Silesian Province (voivodship). The Byczyna – Jamki line in the section from Byczyna substation to the No 50 pylon shares the supporting structures with the Byczyna – Koksochemia line.

The scope of modernisation works includes two 220 kV line sections:

  1. Byczyna – Jamki, with the length of about 36 km, and
  2. Byczyna – Koksochemia, – with the length of about 29,5 km,

The modernisation is to ensure the power supply stability in a very important element of the transmission network development in the country southern part.

The work will be carried out as two tasks:

  • modernisation of the Byczyna – Jamki line, including reconstruction of a line section,
  • modernisation of the Byczyna – Koksochemia line.

Within the project framework the following works will be performed:

  • repair and protection against corrosion of the foundations,
  • replacement of the existing 11 support structures and foundations,
  • the slack adjustment of phase/ground conductors,
  • measurements and repair of earthings,
  • supplementing and replacement of the damaged element of support structures,
  • replacement of insulator strings,
  • corrosion protection of the support structures,
  • replacement of phase and grounding conductor fragments,
  • construction of a single-circuit, over the forest section of the 220 kV Byczyna – Jamki line, together with a fibre optic duct, with total length of ca 1,6 km,
  • adaptation of phase conductors of both lines to work at + 80ºC.

The goal of the works is to:

  • improve the power supply reliability in adverse meteorological conditions,
  • ensure power supply stability in the southern part of the country,
  • improvement of the power transmission network.

The contract was concluded in May 2016. The formal/legal procedures and design works have already started.