Main Development Projects of Soške elektrarne Nova Gorica
Učja hydropower facility
One of several sites in the western part of Slovenia where commercially viable electricity could be generated is close to the village Žaga (sawmill) where the Učja River flows into the Soča River. The hydropower facility Učja will exploit the potential for hydro electricity generation of the Učja River and generate electricity as a pump-storage facility with a useful reservoir sufficient for a weekly to ten-day power comensation.
The scenarios for the exploitation of the hydropower potential of the Učja River are elaborated in the technical descriptions and drawings with the title »The concept with the elements of thee preliminary design«, number IKCU-A700/051 dated February 2002 and in the »Study for the determination of the optimal height of the installation and the size of the reservoir« prepared by the joint venture KORONA d.d. – IBE d.d.
The documentation contained in the above studies pencils in several variants for the Učja hydropower facility (variants 1,1a; 2,2a; 3,3a; 3',3a') and it has been designed as an impoundment facility that uses a dam to store river water in a reservoir.
In accordance with the results obtained in these studies, the so-called »variant 2a« has been assessed as the scenario with most positive commercial and energy-producing effects. The facility is composed of a dam to store water at the elevation of approximately 545 m having the gross volume of 853,000 m3, a penstock carrying water to the turbines 3,450 m long and the high water pressure pipe 808 m long (both run along the right bank of the Učja River), the plant room with one engine with a Francis turbine having the nominal power of approximately 34 MW, with the gross head (vertical change in elevation) of 210 m, Discharge water flow 20 m3/s and with the annual production of approximately 31 GWh. In addition to the aforementioned structures, a compensation reservoir for storing the river water at the elevation of 334 m has also been designed having the maximum volume of 27,300 m3. The connection to the power grid has been designed as a 110/20 kV double circuit power transmission line to the existing Kobarid – Bovec power transmission line.
Tentative funding required under the investment project is in the range of 55 million euros. The estimated period of construction is 4 years (2012-2015).
In 2010, two initiatives have been made for the preparation of the state spatial plan and for granting a concession for the use of water for the generation of electricity.
Key information on the Učja hydropower facility
Hydro potential: River Učja
Discharge water flow (Qi): 20 m3/s
Total installed power - gen.: (MW) 34
Average annual power production (GWh): 31
Tentative funding required (€ million): 55
Planned construction period: 2012 – 2015
Kneža hydropower facility
The Kneža hydropower facility will exploit the remaining available hydro potential of the Kneža River and specifically the section between the elevations 420.00 m and 332.00 m and the river bed. The concept envisages a diversion facility (run-of-river) without a reservoir to store water. The location of the water catchment area has been planned downstream of the confluence of the Lipovščka and Kneža rivers. The planned variant is the valley carved by the based on the difference between the intake and the outlet points (a gross head (vertical change in elevation)) of 68 m. The diversion power plant is the planned on the left bank of the Kneža River and in the area of the confluence of the Kneža and Liščak rivers, above the Kneža village. The connection to the transmission lines of the power grid will be made at the existing power transmission line that runs along the valley carved by the Kneža River.
The tentative value of the investment project is in the range of 2.5 million euros. The estimated period of construction is two years (2011-2012). The authorities have already been approached to grant a concession for the use of water for electricity generation.
In 2010, two documents were completed: »A Study of the use of the Kneža River Water Course for Power Generation«, binder number HIK3---1X/M02, June 2010 and »The Preliminary Concept of the Kneža Micro Hydropower Facility «, binder number HIK3---1X/M01, July 2010.
Key information on the Kneža hydropower facility
Hydro potential: Kneža River
Discharge water flow (Qi): 2 m3/s
Total installed power - gen. (MW): 1
Average annual power production (GWh): 5
Tentative funding required (€ million): 2.5
Planned construction period: 2011 – 2012
Drinking water and micro hydropower facility Možnica II
The project will address all the aspects of a new water supply system designed to provide drinking and fire-fighting water for the towns Bovec and Čezsoča and at the same time the exploitation of the hydropower potential of the watercourse of the Možnica River to generate electricity.
A small-scale hydropower facility will exploit the available gross head (vertical change in elevation) from the height of approximately 250 m. The planned location hydropower facility will take into account the existing high-tension transmission grid and the requirements for connecting to the power grid. One of the possibilities is hydro electricity generation in the form of micro hydropower facility with the Discharge water flow of up to 1 m3 producing approximately one MegaWatt.
Key information micro hydropower facility Možnica II
Hydro potential: River Možnica
Discharge water flow (Qi): 1 m3/s
Total installed power – gen. (MW): 1
Average annual power production (GWh): 3,5
Tentative funding required (€ million ): 3,2
Planned construction period: 2012 – 2015
Kanalski Vrh wind power plant
The exploitation of wind power to produce electricity is becoming increasingly important in Europe and around the globe. Harnessing wind power is an important step toward achieving the set objectives in the area of renewable energy development.
One of the potential locations for the erection of a wind power plant is at Kanalski Vrh, in the immediate vicinity of the reservoir of the pumped-storage facility Avče, within the influence area. The microlocation will be selected by taking into consideration wind directions and the topographic and other features of the terrain since wind turbines have to be erected at a distance of not less than three diameters of the wind turbine blades.
The blueprint for the construction of a wind power plant at Kanalski Vrh pencils in the erection of three to five generators connected to the wind turbines having power of 2 MW. By erecting a wind power plant, the annual emissions would decrease by approximately 12,000 tones. During the life cycle of the wind power plant, it would mean cutting back CO2 emissions by 240,000 tones.
Tentative funding required investment is in the 10 million euro bracket. The estimated period of construction is two years (2012-2013).
Key information on the Kanalski Vrh wind power plant
Location: Kanalski Vrh
Total installed power - gen. (MW): 10
Average annual power production (GWh): 32
Tentative funding required (€ million): 10
Planned construction period: 2012 – 2013
Photovoltaic power plant at Kanalski Vrh
The area located at the upper reservoir of the Avče pumped-storage hydropower facility near Kanalski Vrh enjoys plenty of sunshine. Its high overall sun exposure for Slovenia ranks it among 15% of the most suitable locations in Slovenia. The terraced areas with suitable slopes facing south enable efficient utilization of space and the erection of a high number of photovoltaic modules. Plenty of wind and 600 m above sea level mean more efficient cooling of the modules and less dust particles in the air and on the modules – both features increase the performance of the transformation of light energy into power. In combination with the Avče pumped-storage hydropower facility having the upper reservoir in that area and the planned wind power plants, the solar power plants at Kanalski Vrh would be yet another part of the power park of renewable energy sources.
The installed power of the power plants would be on the maximum level of the characteristic areas (up to 1 MV, i.e. up to 50 kW), one unit having the power of 991.1 kW and two micro units having power of 49.68 kW each.
The value of the investment project is in the range of 3.3 million euros. The estimated period of construction is one year (2012).
Key information on the Kanalski Vrh photovoltaic power plant
Location: Kanalski Vrh
Total installed power - gen. (MW): 1
Average annual power production (GWh): 1,1
Tentative funding required (€ million): 3,3
Planned construction period: 2012
Water supply network – Kobariški Stol
The project addresses the issue of a new water supply system designed to serve the area of the Municipality of Kobarid and specifically by exploiting the water source lying below the ground level of Kobariški Stol. By constructing such a water supply system, the supply with drinking water for the area of the Municipality of Kobarid and the villages scattered along the border with Italy will improve and it will enable also to set up a plant for bottling drinking water.
The planned quantity of ground water is considerable and totals 500 liters per second.
The financing of the project envisages co-financing with other business partners where a 40% share in the amount of 6.7 million euros is to be provided by SENG.
Key information on the Water Supply System – Kobariški Stol
Location area of: Municipality of Kobarid
Project value (€ million): 17
40% project value SENG (€ million): 6.7
Planned construction period: 2015 – 2017
Advantages common to all projects:
- Higher level of exploitation of the hydro potential of the Soča River and its tributaries,
- Higher production,
- Higher installed power and reliable power supply,
- Largely generating peak energy,
- Green and blue energy.
Opportunities provided all projects:
- Improving the power generation structure in Slovenia,
- meeting consumer demand – consumption surges,
- secondary regulation of power and energy,
- the exploitation of the river basin for various purposes,
- dodatne dejavnosti – drinking water.
The projects will be funded by the company and by tapping other forms of financing (loans …).
Soške elektrarne Nova Gorica d.o.o.
Erjavčeva 20, 5000 Nova Gorica
Phone: +386 (0)5/339-63-10
Fax: +386 (0)5/339-63-15