In modern wind power plants, the power output from the wind is adapted to the changing wind conditions. In the strong wind range, power output is limited to protect the turbine. The rotor blade adjustment serves this purpose. By adjusting the angle, this changes the forces acting on the rotor blade. In the normal wind range, power consumption is optimised by means of variable speed generator systems. It demonstrates a wind power plant with rotor blade adjustment and variable speed generator. The wind power plant stands on a tower in a wind tunnel. The air flow is generated by an adjustable speed fan. A flow straightener ensures consistent and low-turbulence flow. A three-blade rotor drives the generator directly. The rotor blades can be easily replaced. The wind tunnel is closed during the experiments to ensure that the experiments are conducted safely.
Learning Objectives And Experiments
- Conversion of kinetic energy into electrical energy
- Power adjustment by means of speed adjustment
- Power adjustment by means of rotor blade adjustment
- Behaviour in the case of oblique flow
- Recording of characteristic diagrams
- Determination of the power coefficient as a function of the tip-speed ratio and rotor blade adjustment angle
- Determination of the power coefficient as a function of the tip-speed ratio and yaw angle
- Comparison of different rotor blade shapes
Specification
- Wind power plant with rotor blade adjustment
- Wind power plant with yaw angle adjustment
- Gearless wind power plant with 3-blade rotor
- Variable speed generator system
- Power regulation by means of rotor blade adjustment
- Interchangeable rotor blades
- Fan with adjustable speed to generate an air flow
- Wind velocity, rotor speed and yaw angle are measured by sensors
Technical Data
- Wind power plant
- Ø rotor: 0,3m
- Number of rotor blades: 3
- Rated electrical power: approx. 6W
- Rated wind velocity: 10m/s
- Rated speed: 3400min-1
- Design tip-speed ratio: 4,5
- Rotor blade adjustment: -5…35°
- Weight: approx. 1,6kg
- Nacelle: lxwxh: approx. 270x65x90mm
- Generator
- Rated voltage: 12V
- Rated current: 2,02A
- Wind tunnel
- Ø 400mm
- Axial fan
- Max. Volumetric flow rate: 6860m3/h
- Max. Power consumption: 1,1kw
- Measuring ranges
- Wind velocity: 1…15m/s
- Speed: 0…4000min-1
- Current: ±2,02A
- Yaw angle: ±40°
- 230V, 50Hz, 1 phase
- 230V, 60Hz, 1 phase
- 120V, 60Hz, 1 phase
