ROOT CAUSE ANALYSIS OF GENERATOR ROTOR ENDWINDING FAILURE

摘要

The power plants are classified by the type of fuel and the type of operating condition. The most of the gas turbine power plants are usually operated under DSS (Daily Start-up and Shutdown) mode. To find out the root causes of the turbine failure, the study and inspection were performed in the plant. Based on the analysis, there are some serious damages on gas turbines generator rotor windings. The basic causes of the damage are thermal growth and abrasion. The damages occurred from squared type winding, retaining ring insulation difference, and short-turn. We use the ABAQUS program to analysis the problem for the damage and show how to improve.