Slo | Eng | Blok 6 | Unit 6
Home HSE Group Home HSE Group

TEŠ – an important pillar of Slovene energy

The Šoštanj Thermal Power Plant is the largest power plant in the system of Holding Slovenske Elektrarne and in the Slovene electricity system (EES) according to annual production of electricity and installed power. The power plant produced over 3,700 GWh of energy annually in the period from 2003 to 2010. It is an important energy pillar for the reliable supply of electricity in Slovenia due to its average share of production of electricity which amounts to nearly 35 percent. TEŠ also adjusts production of electricity to current needs in Slovenia and ensures the quality of this energy and the regulation of frequency and power. It also supplies several thousand residents of the Šaleška dolina Valley with remote heating.

Information on production units in TEŠ and production in TEŠ can be found in the charts below.

Unit Installed power Threshold power (MW) First year of operation Planned year of shutdown
Block 1 (shut down) 30 MW 25 MW 1956 2010
Block 2(shut down) 30 MW 25 MW 1960 2008
Block 3 75 MW 55 MW 1960 2015
Block 4 275 MW 248 MW 1972 2015
Block 5 345 MW 305 MW 1977 2027
PT 51 42 MW 41.9 MW 2008 2027
PT 52 42 MW 41.9 MW 2008 2027
TOTAL 839.0 741.8
TOTAL (excluding B1 and B2) 779.0 691.8

Production of electricity in TEŠ and share in production in Slovenia

Year Production TEŠ (GWh) Production in Slovenia (GWh)(1) % TEŠ
On the generator At the threshold
2003 3,962 3,464 10,637 (2) 32.6%
2004 4,044 3,550 10,787 32.9%
2005 4,139 3,641 10,483 34.7%
2006 4,269 3,749 10,536 35.6%
2007 4,268 3,756 10,422 36.0%
2008 4,359 3,850 11,330 34.0%
2009 4,244 3,753 11,703 32.1%
2010 4,460 3,946 11,728 33.6%

[1] The figures are based on half of the production of the Krško Nuclear Power Plant (NEK).
[2] The figures take into account the international contract signed in 2003 transferring half of the ownership and production to HEP which enters into force in the middle of April 2003.

The thermal power plant depends on the use of lignite in Velenje as the primary energy product for the production of electricity. Average annual consumption of coal in the period 2003 to 2010 amounted to 4,100 thousand tonnes.  The use of coal results in atmospheric pollution with carbon dioxide emissions. Due to environmental aspects and Slovenia’s commitment to the Kyoto protocol, great pressure has arisen to reduce coal consumption in processes for obtaining final forms of energy. Thus, on the one hand, we would like to ensure reliable national production of electricity and on the other, are limited due to environmental requirements.

The existing thermal energy blocks of TEŠ are very decrepit, uneconomical and less environmentally friendly and will be unsuitable after 2016. As TEŠ is strategically important due to reliable, safe and competitive production of electricity with a domestic energy product, a supplementary 600 MW block 6 is being built in TEŠ which will fully replace the production and services in the existing coal mine units in TEŠ, thereby reducing the consumption of coal by one third. Carbon dioxide emissions will be decreased by 35% and all other environmental pollution will also be reduced. This will reduce the price of electricity produced by TEŠ which will be generated in an economical, environmentally friendly and technologically perfected way.

TEŠ (1-5) = TEŠ 6 – for producing safe, reliable, competitive electricity and heat energy and ensuring the energy independence of Slovenia.