H4HV-18-C gears roller bearings are im mersed in oil to th Helical speed reducer H4

Flender/Flender Gear Units/Helical speed reducer H4

ich is hosted at DTU. WTMLAB enables development of new data acquisition utilities, enables hands-on experiences with wind turbine operations, enables design of new test procedures and algorithms and for collaboration with other universities and research institutions through the Internet. WIND TURBINE DESCRIPTION The test wind turbine is located at Ris Campus, Roskilde and is traditional Danish three-bladed stall regulated Nordtank, NTK 5/4 wind turbine see specifications in Table 1. The wind turbine is primarily used for energy production and is serviced on commercial conditions. It is located on the former Danish test station for wind turbines at Ris National Laboratory with free undisturbed inflow from the dominant Westerly wind sector. Presented at EWEC 2, Athens 2 February 2 March 2 Page 2/8 Rotor Diameter 4.1m Rotational Speed: 2.1 rpm Measured tip angle: -0.2.2 Blade type: LM 1.1 Blade profile[] NACA 6-4xx & NACA FF-W3, equipped with vortex generators. Blade length: 1.0 Blade chord: 0.2 1.6 Blade twist: 0.0 2.0 degrees Air brakes Pivot-able blade tips, operated in FS-mode Mechanical brake High speed shaft, operated in FS-mode Power regulation Passive aerodynamic stall Gearbox Flender; ratio 1:5.3 Generator 5 kW, 4 poles, 6 Tower Conical steel tube, =3.8 Hub height 3.0 Tilt 2 Coning 0 Masses: Blade weight: 1 kg Rotor incl. hub 9 kg Tower head mass 2 kg Tower mass 2 kg Table 1: Nordtank NTK 5/4 specifications - October 2 The wind turbine was installed in 1 for testing and has been subject to many tests and investigations during 1- 1 according to references [1,2,3,4,5,6]. frequency converter system has been designed and implemented, which enables an operation with variable frequency, but this feature has not been activated yet during the measurement period. The wind turbine is connected to local 4 grid, designed for test of smaller wind turbines. The 4 is supplied from the public 1 kV grid thro