TY  - JOUR
T1  - High Voltage Power Transformer Transfer Function Based on Vector
Fitting and Experimental Analysis
AU - Mohamed, Ramizi AU - Faraj, Moneer A. AU - Mohamed, Azah 
JO  - Journal of Engineering and Applied Sciences
VL  - 12
IS  - 18
SP  - 4730
EP  - 4735
PY  - 2017
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2017.4730.4735
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2017.4730.4735
KW  - transfer function
KW  -transformer faults diagnosis
KW  -Frequency Response Analysis (FRA) of power transformer
KW  -victor fitting method
KW  -implemented
KW  -electrical
AB  - One of the most important equipment elements in HV transmission systems are transformers.
Therefore, improvement techniques for transformer life assessment have been developed in recent years.
Frequency Response Analysis (FRA) is a useful method for the reliable detection of electrical and mechanical
faults in transformers. The point to be further emphasised in FRA is interpreting deviations in order to identify
the failures .In this research an algorithm for automated analysis is developed based on analytical model results
by approximating measurement data to a rational function to obtain minimum complexity by using the vector
fitting method. The Root-Mean-Square (RMS) between the measured data and proposed-fitted transfer function
is determined by searching the number of complex and real starting poles as well as, number of iterations, linear
or non-linear distribution of the proposed poles over the reference measured frequency range is determined as
well besides finding the order of the approximation function that consequently represents the transformer’s
transfer function. A MATLAB software program has been implemented for the vector fitting algorithm with the
measured data.
ER  -