Title :
A novel approach for on-line deformation diagnostics of transformer windings
Author :
Joshi, P.M. ; Kulkarni, S.V.
Author_Institution :
Electr. Eng. Dept., Gov. Coll. of Eng., Karad, India
Abstract :
This paper discusses an elegantly simple on-line approach for deformation diagnostics of transformer winding. The Current Deviation Coefficient (CDC) derived from terminal current measurements at a selected high frequency (HF) is found to be an effective indicator for locating deformed section of the winding. Also, any deviations of HF terminal currents from their fingerprint values can be used to find the extent of deformation. An on-line method for detecting winding deformations in three-phase star- or delta-connected winding is also elaborated in the paper. Finally, a proposal for simultaneous on-line monitoring of HV and LV windings using the novel on-line approach is discussed.
Keywords :
condition monitoring; deformation; fault diagnosis; transformer windings; current deviation coefficient; delta-connected winding; online deformation diagnostics; online monitoring; three-phase star winding; transformer windings; Current Deviation coefficient (CDC); frequency response analysis; ground capacitance; power transformer; series capacitance; winding deformation;
Conference_Titel :
Power and Energy Society General Meeting, 2010 IEEE
Conference_Location :
Minneapolis, MN
Print_ISBN :
978-1-4244-6549-1
Electronic_ISBN :
1944-9925
DOI :
10.1109/PES.2010.5589995