Novel Condition Monitoring Method for Wind Turbines Based on the Adaptive Multivariate Control Charts and SCADA Data

Table 3

Anomaly information for the wind turbine unit during the period from 12/1/2015 to 6/1/2016.

Anomaly no.	Anomaly description	Monitored period	Number of data points	Time of alarm log
A	Generator brush worn	12/3/2015 19 : 10–12/7/2015 6 : 30	500	12/6/2015 20 : 30 (alarm log: point no. 440)
B	Gearbox running hot in low generator stage	2/1/2016 00 : 00–2/4/2016 11 : 10	500	2/3/2016 22 : 10 (alarm log: point no. 421)
C	Shaft bearing overtemperature	5/28/2016 15 : 50–6/1/2016 3 : 10	500	5/31/2016 15 : 20 (alarm log: point no. 429)