Power And Energy Needed For Starting A VerticalAxis Marine Current Turbine [Elektronisk resurs]
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Forslund, Johan 1985- (författare)
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Proceedings of the 12th European Wave and Tidal Energy Conference 27th Aug -1st Sept 2017, Cork, Ireland
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Nilsson, Karin (författare)
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Leijon, Mats 1958- (författare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
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Marine Current Power (medarbetare)
- 2017
- Engelska.
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Sammanfattning
Ämnesord
Stäng
- A marine current power station has been deployedin Söderfors, Sweden. It comprises a five bladed fixed pitchvertical axis H-rotor turbine directly connected to a permanentmagnet synchronous generator. The turbine is rated for 1.3m/s, but at lower water speeds the turbine is generally not selfstarting. This paper investigates the energy and power neededto at low speeds start the turbine electrically with a BrushLessDC (BLDC) motor until the turbines gives a net positive torqueto the generator. A range of startup BLDC powers have beeninvestigated. It is shown that for three water speeds (0.98 m/s, 1.04m/s and 1.16 m/s) the energy needed for start up is equivalent toless than 1.2 s of power production at maximum power captureof the turbine. The startup time is mostly dependent on BLDCpower setting, not on water speed. A BLDC power of 1/7th ofrated power of the machine is enough to start the machine within2 seconds. The results suggest that a higher BLDC power thanthat will not significantly reduce the startup time nor reduce theenergy needed (increase the efficiency of the startup process).The water speed has the highest impact on the time it takes torecover the energy needed for startup once the BLDC power iswell above the losses in the system.
Ämnesord
- Engineering and Technology (hsv)
- Teknik och teknologier (hsv)
- Engineering Science with specialization in Science of Electricity (uu)
- Teknisk fysik med inriktning mot elektricitetslära (uu)
Indexterm och SAB-rubrik
- Marine current power
- startup energy
- Söderfors
- vertical axis turbine
Inställningar
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