Method for Estimation of Nonlinear $\lambda$-I Relation of Single Phase Power Transformer Core by Using On-line Measurable Parameters

Farhad Gh. Khodaei

In design of new power transformers, reliable and efficient tools are required to expedite research and development processes. Some of these tools are used to interpret the data obtained from the transformer tests for better judgement about the response of the transformer. In this paper a clear procedure is proposed to estimate the nonlinear relation between flux and excitation current of power transformers by using online measurable data, which is the main reason of the input current harmonics. It is shown that the procedure computes this relation with very high precision and leads to identical results to that applied in simulation.

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