About the project
The HSE Group follows guidelines in environmental protection and renewable energy sources. We are already the largest producer of electricity from renewable sources in Slovenia. Thanks to our hydroelectric power plants, we produced as much as 88 percent of the “green” electricity in Slovenia in 2020. With 995 GWh of electricity produced in October, Dravske elektrarne Maribor (Drava power plants Maribor) and Soške elektrarne Nova Gorica reached the highest monthly production in the history of the HSE Group, and in the same month we also recorded the largest daily amount of electricity produced in the history of the HSE: a total of 36.7 GWh.
Together we have 17 hydroelectric power plants, 26 small hydroelectric power plants and one pumped storage hydroelectric power plant. Project HSE sonce (HSE Sun), however, combines our guidelines, principles and projects in solar power plant construction.
Skupina HSE sledi smernicam na področju varstva okolja in obnovljivih virov energije. Že danes smo največji proizvajalec električne energije iz obnovljivih virov v Sloveniji. V letu 2020 smo proizvedli kar 88 odstotkov »zelene« električne energije v Sloveniji, za kar gre zasluga našim hidroelektrarnam. Dravske elektrarne Maribor in Soške elektrarne Nova Gorica so z 995 GWh proizvedene električne energije oktobra dosegle največjo mesečno proizvodnjo v zgodovini obstoja skupine HSE, istega meseca pa smo zabeležili tudi največjo dnevno količino proizvedene električne energije v zgodovini obstoja HSE: kar 36,7 GWh.
Skupaj imamo 17 hidroelektrarn, 26 malih hidroelektrarn in eno črpalno hidroelektrarno. Projekt HSE Sonce pa združuje naše usmeritve, načela in projekte na področju izgradnje sončnih elektrarn.
Our solar power plants
The HSE Group currently has six solar power plants with less than one megawatt of installed capacity, and the seventh, the Prapretno solar power plant,is the first more than one megawatt power plant in Slovenia which received a building permit.
| Year of commissioning | Installed capacity (MW) |
LAnnual production (GWh) | |
| SPP Dravograd | 2012 | 0,041 | 0,042 |
| SPP OCV3 | 2012 | 0,026 | 0,028 |
| SPP Zlatoličje | 2011 | 0,777 | 0,893 |
| SPP Zlatoličje, Segment 5 | 2022 | 2,5 | 3 |
| SPP Formin | 2012 | 0,112 | 0,123 |
| SPP Gimnazija Velenje | 2011 | 0,049 | 0,049 |
| SPP Hubelj | 2020 | 0,055 | 0,073 |
| SPP Prapretno | 2021 | 3,036 | 3,362 |
DRAVOGRAD SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL POWER CAPACITY OF 40.5 KWP IS LOCATED IN THE AREA OF THE DRAVOGRAD HYDROELECTRIC POWER PLANT.
162 polycrystalline photovoltaic modules with a power capacity of 250 Wp are installed on the sloping roof of the administrative building, which has a 40° incline and an orientation of -20° south. The solar power plant is connected to the network on the 0.4 kV side of the Dravograd hydropower plant’s own consumption. It is connected to the distribution network via a 20 kV supply.
OCV3 SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL CAPACITY OF 25.5 KWP IS LOCATED IN THE AREA OF THE COMPANY’S ADMINISTRATIVE BUILDING.
102 polycrystalline photovoltaic modules with a power capacity of 250 Wp are installed on the flat roof of the business building on a load-bearing structure with an inclination of 20° and an orientation of 10° south. The OCV3 solar power plant is connected to the LV network on the 0.4 kV side of the existing 1000 kVA compact transformer station. Connection to the public network is carried out at the 20 kV level of a compact transformer station.
ZLATOLIČJE SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL POWER CAPACITY OF 776.75 KWP IS LOCATED IN THE AREA OF THE ZLATOLIČJE HYDROELECTRIC POWER PLANT.
273 single-crystal photovoltaic modules, each with a power capacity of 250 Wp and a total power capacity of 68.25 kWp, are installed on the flat roof of the engine room, which has an inclination of 20° and an orientation of 0° south; 102 polycrystalline photovoltaic modules, each with a power capacity of 250 Wp and a total power capacity of 25.5 kWp are installed on the garage roof, which has an inclination of 11° and an orientation of 0° south; 2540 polycrystalline photovoltaic modules, each with a power capacity of 250 Wp and a total power capacity of 635 kWp are installed on the banks of the HPP drainage channel, which has an inclination of 35° and an orientation of -10° to + 5° south; 192 polycrystalline photovoltaic modules, each with a power capacity of 250 Wp and a total power capacity of 48 kWp are installed on part of the flat surface on the south side of the engine room of HPP Zlatoličje, which has an inclination of 35° and an orientation of 0° south. Connection to the public network is carried out at the 20 kV level in the transformer station TP 20 / 0.4 kV Zlatoličje
SEGMENT 5 OF THE ZLATOLIČJE SOLAR POWER PLANT
SEGMENT 5 OF THE ZLATOLIČJE SOLAR POWER PLANT
Segment 5 of the Zlatoličje Solar Power Plant will be installed on the left bank of the outflow canal of Zlatoličje, the largest Slovenian hydro power plant, from the bridge across the canal to the Slovenja Vas karting track, in the length of 905 metres. A total of 5,694 photovoltaic modules have been installed with a total nominal power of 2.5 MWp, which can annually produce 3,000 MWh of electricity. Given the slope of the terrain, which in some places exceed 30o, the construction was a considerable challenge and required caution from the contractor, the sheltered workshop HTZ Velenje, which is also part of the HSE Group. A special feature of the power plant is that the central inverter, with a substation and medium voltage switchyard, is housed in a container.
Segment 5 of the Zlatoličje Solar Power Plant is or will be part of a larger solar power plant with a total projected nominal power of 30 MWp and planned annual production of 37,000 MWh, which will be constructed on the inflow and outflow canals of the Zlatoličje and Formin hydro power plants.
FORMIN SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL POWER CAPACITY OF 112 KWP IS LOCATED IN THE AREA OF THE FORMIN HYDROELECTRIC POWER PLANT.
448 single-crystal photovoltaic modules, each with a power capacity of 250 Wp, are installed on a flat roof with 20° incline and an orientation of + 10° south and on the roof of a garage with a 12° incline and an orientation of 10° south. Connection to the public network of the power system is carried out at the 20 kV level from the transformer station TP 20 / 0.4 kV own consumption of the hydroelectric power plant Formin.
GIMNAZIJA VELENJE SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL POWER CAPACITY OF 49.68 KWP IS LOCATED ON THE ROOF OF GIMNAZIJA VELENJE IN THE VERY CENTRE OF VELENJE.
216 semi-crystal modules, each with a power capacity of 230 Wp, are installed on the flat roof of Gimnazija Velenje. A metal substructure with a south-facing orientation and a 20° incline is installed on the flat roof, which allows the use of solar radiation to the maximum extent possible. The power plant sent the first kilowatt hours to the grid in December 2010. Everything has been operating reliably ever since and achieving the planned production. It is connected to the public distribution network directly at the 0.4 kV level.
HUBELJ SOLAR POWER PLANT
A SOLAR POWER PLANT WITH A TOTAL POWER CAPACITY OF 71.04 KWP IS LOCATED ON THE ROOF OF THE ENGINE ROOM OF SHPP HUBELJ IN THE TOWN OF AJDOVŠČINA.
There are 65 modules on the roof above the switchyard with a total power capacity of 20.8 kWp, oriented with an azimuth of 45° and an inclination of 8°; there are 106 modules on the roof above the engine room with a total power capacity of 33.92 kWp, oriented with an azimuth of 306° and an inclination of 11°; and there are 51 modules on the roof above the workshop with a total power capacity of 16.32 kWp, oriented with an azimuth of 319°; a total of 222 single-crystal photovoltaic modules with a power capacity of 320 Wp are installed. The solar power plant is connected to the 0.4 / 20 kV Elektro Primorska substation in the yard of SHPP Hubelj.
PRAPRETNO SOLAR POWER PLANT
THE PRAPRETNO SOLAR POWER PLANT WITH A TOTAL CAPACITY OF 3,036 MW WILL BE BUILT ON THE RECULTIVATED AND CLOSED PART OF THE PRAPRETNO NON-HAZARDOUS WASTE LANDFILL NEAR HRASTNIK AND WILL BE THE LARGEST SOLAR POWER PLANT IN SLOVENIA.
It will have 6,902 monocrystalline modules, each with a power capacity of 440 Wp, and is expected to produce 3,362 MWh of electricity per year, which is sufficient for the annual electricity needs of about 800 average Slovenian households or about 30 schools. The modules will be installed on a structure that will be attached to the ground. The incline of the modules will be 20° and they will be oriented to the south.
The construction of the power plant at Prapretno is of great symbolic significance for the HSE Group and the local environment. The area was very environmentally burdened in the past due to the production of electricity in the Trbovlje thermal power plant and nearby coal mining. HSE will revive electricity production at this location, but in an environmentally friendly way, without greenhouse gas emissions.
The Prapretno solar power plant will cover an area of about 4.5 football fields.
