Modernisation of 220 kV power lines of PSE Południe.
The line route crosses the provinces of Katowice, Kielce, Łódź and Cracow. The scope of modernisation works includes five sections of 220 kV line:
- Joachimów – Rogowiec 1 – line length of 78 km,
- Joachimów – Rogowiec 2 – line length of 75 km,
- Łośnice – Koksochemia – line length of 27 km,
- Łośnice – Kielce – line length of 93,5 km,
- Łośnice – Siersza – line length of 40 km.
Extreme meteorological phenomena leading to line failures have been the reasons for maintenance works (in January 2010 the lines were in the catastrophic icing zone).
The modernisation is to ensure the power supply security and reliable functioning of the power system in these regions.
Scope of work has been divided into three stages: preparation of design and formal/legal documentation, consultations/approvals of the object owners and construction/assembly works, and tests, with development of as-built documentation.
In the project the following works have been carried out:
- repair, maintenance and protection against corrosion of pylons,
- replacement of obsolete overhead ground wires,
- replacement of corroded lightning towers,
- check and repair of earthings,
- check of fire protection effectiveness,
- refurbishment of the line marking,
- laying and connecting of fibre-optic cables to service buildings at Joachimów, Rogowiec, Łośnice, Kielce and Koksochemia substations,
- installation of fibre-optic distribution boxes in Joachimów, Rogowiec, Łośnice, Kielce and Koksochemia substations,
- dismantling of existing analogue ESB400 high frequency teleprotection devices and installation of redundant digital teleprotection facilities, equipped with optical and E1 interfaces on the 220 kV Łośnice – Kielce line.
Benefits of the line modernisation:
- improvement of power supply security of the provinces (voivodships) of Katowice, Kielce, Łódź and Cracow,
- improvement of the line technical condition,
- creating of favourable conditions for connecting new electricity consumers, and in this way increasing attractiveness of the grounds for new investments.
The formal/legal procedures necessary to carry out the project, including collection of all legally required permits and decisions commenced in August 2014, while the modernisation works were completed in March 2017.