الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Powersystemprotectionisanimportantissuethatshouldbehandledin
ordertokeeptheelectricalpowersystem dependability,securityand
reliability.Inrecentyears,DiscreteWaveletTransforms(DWTs)have
beenwidelyacknowledgedasoneofthemostpromisingdevelopmentsin
thefieldofelectricpowerprotection.Wavelettransformconsistsofaset
offamiliesthatdifferthaneachotherinthewaveletfunctionandscaling
function,buttheyagreedinanalyzingthedatainbothtimescaleand
frequencyscale.
Inthisthesis,fourDWTsfamiliesareusedforprotectionoftwopower
systemequipment(transmissionlinesandtransformers)andastudyhas
beencarriedtoevaluatethemosteffectivefamilythatcanbeusedfor
protectionoftheaboveequipment.
ThepurposeofusingtheDWTanalysisfortransmissionlineprotection
istodeterminethefaultlocationandfaulttype.While,theDWTanalysis
isusedfortransformerprotectiontodiscriminatebetweentheinternal
faultcurrentsandthemagnetizinginrushcurrentsintheprimarywinding
attheinstanceoftransformerswitching.AhybridsystemofbothDWT
andArtificialNeuralNetwork(ANN)isusedforthatpurposeduetothe
greatabilityofANN todealwithclassificationsystems.Simulation
resultsrevealedsatisfactoryperformanceoftheselectedDWTfamilyfor
bothtransmissionlineprotectionandtransformerprotecon.