Partial Discharges Within the Bars Assigned for Generators Coils

The paper contains the analysis of PD investigations results (within the bars assigned for generators coils) obtained parallel on the ground of the electric method and acoustic emission method as well as unified eclectro-acoustic method. The analysis of results obtained by means of electric method characterizes kind and parameters of PDs. The analysis of results obtained by means of acoustic emission method contains acoustic description of AE signal and detailed analysis of amplitude distributions shapes which gives deformation processes description and PD sources location. Detailed analysis of amplitude distributions shapes has been carried out by means of two methods resultant from definition of AE descriptors and application of Kohonen neural network. The unified eclectro-acoustic method consists in parallel utilisation both methods to mutual verify obtained results.