IEJRD Journal of Science & Technology E-ISSN: 2349-0721 Volume :1 Issue 1
CLASSIFICATION OF DIFFERENT FAULTS IN STATOR OF AN ALTERNATOR Manoj U. Bobade1, Prof.Niermal Chhajed 2,Prof. Pooja Ambatkar3 ,Prof.Sneha Palkar 4 manojbobade143@gmail.com1,rockoninverter@redifmail.com,2poojaambatkar@gmail.com3 , snehapalkar@gmail.com4 1
Dept. of Electrical Engineering ,2Asst.Prof. Dept.Of Electrical Engineering, Asst. Prof. Dept. Of ENTC, 4Asst. Prof. Dept. Of ENTC, AVBIT, Wardha ___________________________________________________________________________________________ 3
Abstract: Synchronous generator are important elements of power system. Its reliability and proper functioning are crucial in maintaining an uninterrupted power supply to the customers. Their reliability affects the electric energy availability of the supplied area. Hence the alternator protection is critical issue in power system as issue lies in the accurate and rapid discrimination of healthy condition from different faults. It is very difficult to describe the relationship of fault information and terminal parameters by accurate mathematical expression. By applying artificial neural network in alternator, the fault diagnosis can obtain a good result. When there are faulty samples in the training samples of ANN, the severity information of the alternator faults can be directly obtained. This project describes a novel and simple artificial neural networks (ANNs) technique without using rigorous mathematics. In this project various faults were conducted on an laboratory alternator and fault currents were captured using Data Acquisition System. The energies of these current samples were calculated using Discrete Wavelet Transform and were given as input to ANN. The results so obtained are finally compared to classify the faults. Keywords: alternator, current, artificial neural network, data acquisition system, discrete wavelet transform.
Introduction Power system are the largest and most complex human made system, where faults always occurred. Faults can reason workforce and tools safety problem, and can result in substantial financial fatalities. In classify to resolve the problems, faults automatic detection, location and isolation must be employed. Most fault can cause large currents or voltage changing, and they are often detected by traditional protective relay. Whereas, some faults such as high impedance error, grounding error of unsuccessfully earthed distribution system, cause small currents and voltages changing and they are difficult to be detected using traditional protective relay. Synchronous generators are important elements of a power system. Its reliability and proper functioning are crucial in maintaining an uninterrupted power supply to the customers. Some of important fault which may occur on Alternator are Overvoltage, Over speed, Over current, Failure of Prime mover, Unbalanced Loading, Failure of Field and Stator winding faults (which includes Line to earth Faults, stroke To stroke Faults, dual Line To Ground Fault, Three phase Fault and inter turn Fault.)
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