Microsoft Word - Modeling and Computational Method for Air-core Winding Based on the Overlapping Partitioning Waveform Relaxati

In this paper, an elaborate broadband model for the air-core winding is created based on the partial element equivalent circuit (PEEC) approach in order to study the internal overvoltage under the lightning transients. Because the large scale of the resulting model makes it difficult to be solved directly, the waveform relaxation method combined with the overlapping partitioning techniques is used. In this method, the whole network is divided into many sub-circuit and solved separately based on the analysis of the winding's coupling parameters. Furthermore, the relationship of the convergence rate between the number of the overlapping areas is also discussed. In order to validate the method, an experiment air-core winding is studied, and a conclusion is achieved that the rate of the convergence can be improved greatly by using the overlapping partitioning techniques.