Modeling and analysis guidelines for slow transients. III. The study of ferroresonance

TLDR

Predicting ferroresonance hinges on accurate transformer models, and ongoing research is rapidly advancing these modeling techniques. The study introduces ferroresonance and outlines a general modeling approach, including representation of the study zone, modeling techniques, and implementation guidance. The authors review literature, illustrate the phenomenon with a single‑phase transformer example, discuss three‑phase core structures, model grounded‑wye distribution systems using laboratory waveform data, and give guidance on study‑.

Abstract

The ability to predict or confirm ferroresonance depends primarily on the correctness of the transformer model used by the computer simulation. Ferroresonance is introduced and a general modeling approach is given. An overview of available literature and contributors to this area is provided. A simple ease of ferroresonance in a single phase transformer is used to illustrate this "phenomenon". Three phase transformer core structures are discussed. Ferroresonance in three phase grounded-wye distribution systems is described and illustrated with waveform data obtained from laboratory simulations. Representation of the study zone is discussed, modeling techniques are presented, and implementation suggestions are made. Three case studies are presented. Transformer representation is critical to performing a valid simulation. The direction of ongoing research is discussed, and the reader is advised to monitor the literature for ongoing rapid improvements in transformer modeling techniques.