A NonLinear Observer of an Electrical Transformer: A Bond Graph Approach

A bond graph model of an electrical transformer including the nonlinear saturation is presented. A nonlinear observer for the transformer based on multivariable circle criterion in the physical domain is proposed. In order to show the saturation and hysteresis effects on the electrical transformer, simulation results are obtained. Finally, the paper describes that convergence of the estimates to the true states is achieved.

Authors:

• Gilberto Gonzalez-A
• Israel Nuñez

Keywords:

• Bond graph
• nonlinear observer
• electrical transformer
• nonlinear saturation.

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