Monitors the tower oscillations

Vibration sensors

Quelle: TWK-Elektronik | Inka Krischke, 03.11.2016, 16:16

Monitors the tower oscillations

In the case of a wind turbine that is shut down in the event of danger, the phase position of the tower oscillation - zero crossing or maximum - at which the turbine is stopped can be decisive, so that the tower does not receive an "additional kick" that causes damage. This ...

e13_SIL2 vibration sensor NVA115 from TWK-Elektronik

... can be set precisely on the NVA115 SIL2 vibration sensor from TWK: If the tower vibrations exceed a permitted limit value, the two safety contacts open and the safety chain is interrupted with phase accuracy. The sensor, designed for the wind industry, detects vibrations from 0.1 to 60 Hz and protects the system from damage caused by oscillations and vibrations. The measured value is evaluated via adjustable frequency filters and supplied to three different interfaces: two analog (e.g. for x- and y-axis), CANopen Safety and two safe switching contacts. The measured acceleration value can be output and further processed as an instantaneous or peak value, as an RMS average value or as an integrated value. The latter function is important to ensure that the system is only switched off if an adjustable acceleration limit value is exceeded slightly but for a longer period of time. A Fourier frequency analysis, which determines the frequency spectrum, is also available.

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