Quiet Power: Advanced Noise Reduction Solutions for Wind Turbines

May.23.2025

As an important representative of clean energy, wind turbines have been widely used around the world. However, with the continuous increase in wind turbines, the noise problem generated during their operation has gradually become prominent. This has caused many household customers to hesitate whether to buy wind turbines as their energy supply. Next, I will start with some popular science on the causes of noise and how to effectively reduce noise.

Noise Sources When Wind Turbines are Running

1. Mechanical noise

· Rotor rotation: The rotor rotates in the process of capturing wind energy, causing eddies and turbulence in the airflow, thus generating aerodynamic noise.

· Generator and transmission system: During operation, the generator and transmission system will generate vibration and noise due to the interaction of mechanical parts such as bearing friction and gear movement.

· Tower structure: The tower structure of the wind turbine may resonate under the action of wind, especially when the wind speed is high, and this resonance will further aggravate the noise.

2. Aerodynamic noise:

· Noise generated by airflow separation, turbulence or wake on the blade surface.

3. Structural noise:

· Vibration noise generated by various components in the cabin under power transmission and external excitation.

· The unbalanced force generated by the uneven wind force on the wind wheel is transmitted to the cabin, causing cabin vibration noise.

· Vibration noise generated by the tower bearing wind loads and dynamic loads generated by the operation of the unit.

How to Solve it?

1. Materials:

· Use new materials to manufacture wind blades, such as composite materials, to reduce the noise of wind blades.

· Use vibration-damping materials and sound-insulating materials, such as rubber vibration-damping pads and sound-insulating felts, to wrap the key parts of wind turbines to reduce the spread of mechanical vibration and noise.

2. Structure:

· Improve the structural design of wind turbines, such as optimizing the shape, size and airfoil of blades to reduce the friction between the wind rotor blades and the air and reduce the generation of mechanical noise.

· Use reinforced concrete piles to reduce the vibration of the machine and reduce the noise when the machine is moving.

3. Control:

·Use intelligent control system to control the machine's operating speed, adjust blade speed and generator power according to wind speed, wind direction and other conditions, and realize active control of noise.

4. Site selection and layout:

·Rationally select and layout wind turbines to avoid building wind power projects in densely populated areas or sensitive areas.

5. Equipment maintenance and care:

·Regularly inspect and maintain wind turbines to ensure normal operation of the equipment and reduce noise caused by equipment failure or aging.