Application of correlation methods for partial discharge location in transformer windings

Abstract

The reliability of a power system mainly depends upon the newlineinsulation design of the power system equipment Transformer plays a major newlinerole in a power system Any failure in the transformer winding will have a newlinecrucial impact on the energy system operation About fifty percent of the newlinefailures in transformers are due to gradual deterioration of winding insulation newlinewhich mainly occurs because of partial discharges PD When a PD is newlineinitiated high frequency transient pulses of duration ranging from newlinenanoseconds to 5 microseconds are generated Identification and location of newlinePD sources are of major importance in both maintenance and repair of the newlineequipment In this study an attempt has been made to analyze the usefulness newlineof correlation methods to locate the PD in transformer windings newline newline