•  
  •  
 

Corresponding Author

A. Badran, Ebrahim

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

Catastrophic transformers failures continue to occur today due to resonance stresses in general and specially ferroresonance. These resonances are initiated due to the cable-transformer connection. In this paper a comparison between high frequency transformer models for resonance studies in general as well for ferroresonance studies is produced. Two electromagnetic transients programs are used in this comparison; EMTP/ATP and EMTDC/ PSCAD. The study is performed by applying an impulse on phase A of the secondary side of the tested transformer. Three connection cases are used in this investigation; separate transformer, a connected cable with primary side, and an additional connected cable with the secondary side of the tested transformer. Theses cases are used to investigate the effect of cable connection on the transformer model response. The comparison shows how the model types vary in their results that care should taken by the choice of the correct model by the investigation of the ferroresonance phenomenon.

Keywords

Transformer; Overvoltage; Ferroresonance; EMTP/ATP; PSCAD/ EMTDC

Download

Share

COinS