Realizations

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:

Byczyna – Jamki, with the length of about 36 km, and
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.