Excessive Stator Endwinding Vibration in Hydrogen Cooled Generator Identified
Excessive Stator Endwinding Vibration in Hydrogen Cooled Generator Identified
2 PagesExcessive Stator Endwinding Vibration in Hydrogen Cooled Generator Identified Company: Midwest USA Utility Machine Description: Hydrogen-cooled Generator, 301.2MVA, 18kV, 2-pole, End Winding Vibration Monitoring History And Failure Mechanism: The utility had an outage in November of 2011 to perform maintenance on the 18 kV turbine generator which included reinforcement of the endwinding structure and the addition of Iris Power fiber optic endwinding vibrations ensors (EVAII sensors). In August 2012, Ten months after the installation of the endwinding vibration monitoring sensors, there was data collected that showed 12.1mils (308µm) pk- pk overall displacement in the radial direction. While there is no formal standard identifying acceptable endwinding vibration levels, Iris Power indicate
