Abstract
The following chapter presents six signal analysis methods, which were found useful for wind turbine fault detection and require more advanced signal processing than the standard methods described in the Chap. 2. The selection of the methods was based on the author’s research history which was closely linked to a problem solving in the renewable power generation business. The first method uses only the data collected by the CMS with no access to the raw data. This is standard data collected on many machines and is typically stored as 10 min averages. Due to highly nonstationary operation, simple thresholding is not sufficient for early fault detection and thus, the method based on statistical parameters is proposed. The second method is the Spectral Kurtosis which is helpful for early detection of bearing and gear faults. The third one is Protrugram whose development was inspired by the observation that spectral kurtosis is vulnerable to random impacts in the signal. If this happens, series of impulses caused by a REB fault may go unnoticed. Next, a set of cyclostationary tools is described. The Modulation Intensity Distribution method belongs to this family and is useful when bearing related modulations are weak or masked by the other faults. The last method is capable of presenting details of dynamic operation of complex gearboxes. A 2-D map is produced and it can help to detect and distinguish faults of a ring, planets and a sun gear. Every method is accompanied by a case study in which its performance is presented.
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Barszcz, T. (2019). Advanced Analysis Methods. In: Vibration-Based Condition Monitoring of Wind Turbines. Applied Condition Monitoring, vol 14. Springer, Cham. https://doi.org/10.1007/978-3-030-05971-2_5
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DOI: https://doi.org/10.1007/978-3-030-05971-2_5
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