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access icon free Cluster analysis of wind turbine alarms for characterising and classifying stoppages

© The Institution of Engineering and Technology
Received 22/06/2017, Accepted 17/04/2018, Revised 09/02/2018, Published 20/04/2018

Turbine alarm systems can give useful information to remote technicians on the cause of a fault or stoppage. However, alarms are generally generated at much too high a rate to gain meaningful insight from on their own, so generally require extensive domain knowledge to interpret. By grouping together commonly occurring alarm sequences, the burden of analysis can be reduced. Instead of analysing many individual alarms that occur during a stoppage, the stoppage can be linked to a commonly occurring sequence of alarms. Hence, maintenance technicians can be given information about the shared characteristics or root causes of stoppages where that particular alarm sequence appeared in the past. This research presents a methodology to identify relevant alarms from specific turbine assemblies and group together similar alarm sequences as they appear during stoppages. Batches of sequences associated with 456 different stoppages are created, and features are extracted from these batches representing the order the alarms appeared in. The batches are grouped together using clustering techniques, and evaluated using silhouette analysis and manual inspection. Results show that almost half of all stoppages can be attributed to one of 15 different clusters of alarm sequences.

Inspec keywords: pattern clustering; wind power plants; wind turbines; pattern classification; feature extraction

Other keywords: information overload; feature extraction; alarm sequences; sequence associated characteristics; stoppage characterization; wind turbine alarm system; manual inspection; stoppage classification; cluster analysis; silhouette analysis

Subjects: Wind power plants

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-rpg.2017.0422
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