Soft sensor design for oil temperature in distribution transformer (type ONAN)

This paper contains a review of a thermal model of transformer published by standard organization IEC on the estimation of the oil temperature for a distribution transformer type ONAN by adding a method to identify certain parameters which are difficult to know their precise values from only technical or normative information.

[1]  Q. H. Wu,et al.  Equivalent heat circuit based power transformer thermal model , 2002 .

[2]  L. W. Pierce Predicting liquid filled transformer loading capability , 1992, [1992] Record of Conference Papers Industry Applications Society 39th Annual Petroleum and Chemical Industry Conference.

[3]  James L. Kirtley,et al.  An improved transformer top oil temperature model for use in an on-line monitoring and diagnostic system , 1997 .

[4]  M.A. Taghikhani,et al.  Thermal coefficient measurements of typical distribution transformers operating under imbalance conditions , 2011, 16th Electrical Power Distribution Conference.

[5]  Kenneth Levenberg A METHOD FOR THE SOLUTION OF CERTAIN NON – LINEAR PROBLEMS IN LEAST SQUARES , 1944 .

[6]  S. A. Khaparde,et al.  Transformer Engineering: Design and Practice , 2004 .

[7]  Otacilio M. Almeida,et al.  Dynamic loading of distribution transformers from models of dynamic thermal , 2010, 2010 9th IEEE/IAS International Conference on Industry Applications - INDUSCON 2010.

[8]  G. Swift,et al.  A fundamental approach to transformer thermal modeling. I. Theory and equivalent circuit , 2001 .

[9]  Michael Unser,et al.  Splines: a perfect fit for signal and image processing , 1999, IEEE Signal Process. Mag..

[10]  Z. Radakovic,et al.  Numerical Determination of Characteristic Temperatures in Directly Loaded Power Oil Transformer , 2003 .

[11]  D. Marquardt An Algorithm for Least-Squares Estimation of Nonlinear Parameters , 1963 .

[12]  James Hardy Wilkinson,et al.  The Least Squares Problem and Pseudo-Inverses , 1970, Comput. J..