ASC sensors increase the efficiency of wind turbines

Climate neutrality in Germany is possible only by substantially expanding the use of wind energy. In 2020, however, only 23.7 percent of the country’s power was generated by wind energy* – and the efficiency of the existing systems is by no means being exhausted. This is due for example to imbalances in the rotor blades, which often reduce efficiency substantially. Capacitive accelerometers from ASC are helping to improve the situation.

Wind turbines can develop mass-related and aerodynamic imbalances, due to formation of ice or erosion of the rotor blades. The two types of imbalance have different effects on the overall system: While mass-related imbalances primarily cause damage to the wind turbine, aerodynamic imbalances additionally reduce the electricity yield. In a 2 MW system, the average loss of yield due to imbalances costs about 20,000 euros per year**.

Wind turbines can therefore achieve full efficiency only if imbalance measurements are carried out regularly. Capacitive accelerometers from ASC play a key role here, since they optimally measure the vibrations that are critical for wind turbines. The triaxial accelerometers ASC 5511LN and ASC 5515LN offer not only exceptional signal and amplitude resolutions of <20 µg (<0.2 mm/s2), but also operate reliably in the range of rotor frequencies to be evaluated (<0.5 Hz).

Capacitive accelerometers from ASC are helping wind park operators to increase the efficiency of their systems. They therefore play an important role in the energy transition and climate protection.

*Source: Federal Statistics Office, Gross Electric Power Generation in Germany 2018-2020
**Source: “Balancing of Wind Turbine Rotors: Economic Advantages and Technical Implementation”. Bundesverband Windenergie e.V., 2015

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Sensorart

ASC 5421MF

Triaxial, capacitive
Measurement range: ±2 to ±200 g
Noise density: 10 to 680 µg/√Hz
Frequency range (±5 %): DC to 2900 Hz

ASC P401A15

Uniaxial, IEPE
Measurement range: ±50 to ±500 g
Frequency range (±10 %): 0.5 Hz to 15 kHz
Scale factor: 10 mV/g to 100 mV/g