SIGNAL-INJECTION DEVICE AND METHOD FOR A LIGHTNING PROTECTION SYSTEM OF A WIND TURBINE

A signal-injecting device (1) for injecting variable-frequency electrical probe signals (SP) into a lightning protection system of a wind turbine (13) or a part thereof without disconnecting the lightning protection system from a main grounding path (5) galvanically connecting the lightning protecti...

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Hauptverfasser: FRØLUND PETERSEN, Gert, KIEL JENSEN, Ole, MADSEN, Søren Find, VOGEL, Stephan, FRANEK, Ondrej
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A signal-injecting device (1) for injecting variable-frequency electrical probe signals (SP) into a lightning protection system of a wind turbine (13) or a part thereof without disconnecting the lightning protection system from a main grounding path (5) galvanically connecting the lightning protection system to the ground s disclosed, said signal-injecting device (1) comprising one or more ferrite cores (7) arranged around a protection unit, such as a down conductor (4), of the lightning protection system, around the main grounding path (5) or at a connection point between the protection unit and the main grounding path (5) and a signal source (6) being configured to generate and inject variable-frequency electrical probe signals (SP) into the lightning protection system, the signal source (6) being connected across the one or more ferrite cores (7). Furthermore, a condition-monitoring device (8) comprising such signal-injecting device (1) and methods for injecting a probe signal (SR) into a lightning protection system of a wind turbine (13) and for monitoring the condition of such light protection system are disclosed.