GENERATOR FIELD WINDING SHORTED TURN DETECTION TECHNOLOGY

摘要

The use of air-gap magnetic flux probes has proven effective in the detection of generator rotor winding shorted turns and has helped to improve the quality of predictive maintenance decisions concerning when or if to perform rotor rework. Analysis of air-gap flux probe data can pinpoint the number and location (pole and coil) of shorted turns without having to take the generator offline. This paper will discuss the theory, methodology and benefits of detecting shorted turns in generator rotors. A number of case studies will be presented.