The power plant was commissioned in 2015 and uses modern three Archimedean screw technology, which is one of the most economical and efficient ways of generating electricity. Each of the screws has a power output of up to 210 kW and drives a synchronous generator through a gearbox.The great advantage of Archimedes screws is their durability - they are not prone to cavitation and can handle water containing larger impurities. The efficiency of this technology is approximately between 75 and 80 %, which is a very good value for this type of plant.
The power plant also includes a weir that ensures optimal water levels. It is designed as a rubber bellows across the entire width of the flow and its design helps to limit resonances during overflows. A fish passage is also an important feature, which allows the safe movement of fish across the weir and contributes to the protection of the local ecosystem. In addition, the power station partially improves water quality by clarifying the water.
The students also learned about the principles of connecting the power plant to the distribution network, which is provided by frequency converters and a transformer at a voltage level of 22 kV. It was interesting to note that the generators require a relatively high excitation current for their operation
The excursion was very informative for the students and helped them to better understand the functioning of small hydropower plants and their technical solutions in practice.
(Pavel Kotrlik)
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