TIME-DOMAIN MODELING OF POWER TRANSFORMERS USING MODAL-ANALYSIS

The paper describes how a new form of transformer model, based on moda l transformer analysis, may be converted from the frequency domain int o the time domain for EMTP implementation. Given results confirm that the resulting time-domain model is able to accurately account for the frequency-dependent effects of practical transformers. The novelty of the model is that it is centred on natural modes of oscillation. These are accessed by linear transformations leading to a highly efficient structure from a computational viewpoint.