Detection of shorted-turns in the rotor winding of cylindrical synchronous generators using discrete wavelet transform

This paper describes a method for detecting the shorted-turn of the rotor windings based on the discrete wavelet transform in the cylindrical synchronous generator. Multi-resolution analysis based on discrete wavelet transform provides a set of decomposed signals in independent frequency bands, which contain the independent dynamic information due to the orthogonality of wavelet function. In the proposed method, detecting the shorted-turn of the rotor windings is based on the decomposition of the rotor currents, where wavelet coefficients of these signals have been extracted. Comparing these extracted coefficients is used for diagnosing the healthy condition from faulty conditions. Experimental results show the effectiveness of the proposed method for detecting the shorted-turn of rotor windings in the cylindrical synchronous generator.