Title :
Estimation of physical transformer parameters from frequency response analysis
Author :
Mitchell, Steven D. ; Welsh, James S.
Author_Institution :
Sch. of Electr. & Comput. Eng., Univ. of Newcastle, Callaghan, NSW, Australia
Abstract :
The wideband frequency response of a power transformer will yield a signature unique to its mechanical geometry. A change in the frequency response can be indicative of winding deformation. Frequency Response Analysis (FRA) is a diagnostic tool used to monitor frequency response changes. The aim of this paper is to facilitate FRA interpretation through the development of a three phase transformer model that is based on the estimation of physical parameters. The paper will demonstrate the applicability of the model by using FRA data sets of a 1.3 MVA distribution transformer and assessing the accuracy of key parameter estimates.
Keywords :
frequency response; parameter estimation; power transformers; transformer windings; FRA data sets; apparent power 1.3 MVA; distribution transformer; frequency response analysis; mechanical geometry; physical transformer parameter estimation; power transformer; three phase transformer model; transformer winding deformation; wideband frequency response; Capacitance; Conductors; Inductance; Mathematical model; Power transformers; Transformer cores; Windings;
Conference_Titel :
PowerTech, 2011 IEEE Trondheim
Conference_Location :
Trondheim
Print_ISBN :
978-1-4244-8419-5
Electronic_ISBN :
978-1-4244-8417-1
DOI :
10.1109/PTC.2011.6019187
