Modeling and Parameter Estimation of High Voltage Transformer Using Rational Transfer Function State Space Approach

Parameter estimation is an important technique for modeling of a high voltage transformer under wide frequency range. The complexity of the winding makes the system so complicated that a model of the real system over a wide range of frequency is difficult to achieve. This paper presents a technique in estimating the parameters of a high voltage transformer from the calculated impulse response. The approach is by modeling the rational transfer function using a state space approach that is called vector fitting. Then the inverse Laplace transform is used to estimate the response in the time domain which represents the approximate impulse response of the system. The estimation procedure of the signal parameters can be achieved using a simple calculation and parameter estimation technique.