Description: Das Projekt "Variable speed technology for low heat hydropower systems" wird vom Umweltbundesamt gefördert und von Universität Kassel, Fachbereich 16 - Elektrotechnik,Informatik, Institut für Elektrische Energietechnik, Rationelle Energiewandlung durchgeführt. Objective: Aim is to modify two small hydropower plants to variable speed operation in order to increase annual energy output by improved part load efficiency and design flow. A 100 kW vertical axis Francis turbine (Kaltenburg, DE) and a new 18 kW waterwheel (Bettborn, LU) will be modified to variable speed operation by use of a AC-AC converter. There will be installed a movable free-overfall weir at the waterwheel. By an expected increase of the electricity production in the range of 10 to 20 per cent , the aim is to proof viability of improving existing low head hydro sites with this technology. Especially low head sites have high variation of head and flow. Variable speed technology allows the system to operate at maximum efficiency for a wide range of hydraulic conditions. Modern power electronics replaces complex mechanical control systems with a high need for maintenance. In wind energy, variable speed technology has already proven its advantages compared to other mechanical technologies. General Information: Unlike earlier approaches with a combination of double regulated turbines and variable speed in a new installation, in this project the combination of a Francis turbine (respectively a water wheel) in existing plants together with a frequency converter will be used to increase part load efficiency and design flow of the system. Only the new IGBT controlled converters which are now used in wind energy as well as in motive power industry appliances can guarantee a reliable variable speed operation of a normal asynchronous generator. The combination of the movable weir and variable speed operation of the water wheel will allow to optimise the power output of the plant under all conditions. The use of an IGBT converter makes it possible to compensate reactive power to improve the mains performance. Due to detailed theoretical analysis and according to the positive experience with variable speed operation in wind energy and motive power technology, the expected increase of the annual power output of the two plants is in the range of 10 to 20 per cent of the actual value. This will reduce the specific cost of the electricity by the same range. For the actual payback tariffs of many European countries, this will increase the number of feasible low head sites. The top water level control by variation of turbine speed (and so flow) will be demonstrated to show a simple, reliable and energy saving alternative to the old hydraulic systems, which are still installed in many sites. The success of the variable speed system in this plants will open a big European SME market for cheap technological improvement of small hydropower plants and low head sites. The monitored performance of the plants data will be stored in a data logger with a modem, to allow automatic down-loading from a server-PC via modem. ... Prime Contractor: Universität Kassel, Fachbereich Elektrotechnik/Informatik, Institut für Elektrische Energietechnik - IEE; Kassel; Germany.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Kassel ? Wehr ? Kleinwasserkraft ? Elektrizität ? Elektronik ? Pflanzensamen ? Staustufe ? Wasserkraft ? Windenergie ? Altgerät ? Bundesrepublik Deutschland ? Main ? Altanlage ? Stromerzeugung ? Elektrotechnik ? Gewährleistung ? Hydraulik ? Marketing ? Verfahrensoptimierung ? Kraftwerkstechnik ? Neuanlage ? Energieeinsparung ? Standortwahl ? Energiegewinnung ? Energiekosten ? Vergleichsanalyse ? Wärmetechnik ? Energiemarkt ? Energietechnik ? Energieumwandlung ? Stückgut ? Erneuerbare Ressource ? Alternativtechnologie ? Europa ? Daten ? Kontrollsystem ? Energieertrag ? Energie ? Wasserstand ? Anlagenbetrieb ? Effizienzsteigerung ? Turbomaschine ?
Region: Hessen
Bounding box: 9° .. 9° x 50.55° .. 50.55°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1997-10-01 - 2024-11-29
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