Transformer Leakage Flux Models for Electromagnetic Transients: Critical Review and Validation of a New Model

• Published in: IEEE transactions on power delivery Vol. 29; no. 5; pp. 2180 - 2188
• Main Authors: Lambert, Mathieu, Martinez-Duro, Manuel, Mahseredjian, Jean, de Leon, Francisco, Sirois, Frederic
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2014; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Consistency; Equivalence; Flux; Inductance; Integrated circuit modeling; Joining; Leakage; Leakage inductance; low-frequency electromagnetic transients; Magnetic circuits; Mathematical model; Mathematical models; topological model; Transformer cores; transformer modeling; Transformers; Windings
• ISSN: 0885-8977; 1937-4208
• DOI: 10.1109/TPWRD.2013.2293978

This paper presents experimental validation of the coupled leakage inductance transformer model. It is shown that the coupled approach yields the same results as the indefinite admittance matrix method of BCTRAN. A topologically correct three-phase shell-type transformer model is proposed. The connection points between the leakage and magnetizing inductances are properly identified, which makes the new model superior to BCTRAN and the hybrid models by providing physical consistency. In addition, experimental verification of a method to calculate the short-circuit inductances is presented. New explanations on the division of leakage flux and on the mathematical equivalence between the T- and Π-equivalent models are also given.