A simple representation of dynamic hysteresis losses in power transformers

Journal Article · Sun Jan 01 04:00:00 EST 1995 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/61.368383· OSTI ID:39960

Leon, F de ^[1]; Semlyen, A ^[2]

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1. Inst. Politecnico Nacional, Mexico City (Mexico)
2. Univ. of Toronto, Ontario (Canada). Dept. of Electrical and Computer Engineering

The paper describes a procedure for the representation of hysteresis in the laminations of power transformers in the simulation of electromagnetic transient phenomena. The model is based on the recognition that in today`s iron cores the hysteresis loops are narrow and therefore the modeling details are only important in relation to the incurred losses and the associated attenuation effects. The resultant model produces losses proportional to the square of the flux density, as expected from measurement data. It is formulated as a simple, linear relationship between the variation B-B{sub rev} of the magnetic flux density B after a reversal point B{sub rev} and the resulting additional field intensity H{sub hyst}. This idea can be easily implemented in existing transformer models with or without frequency dependent modeling of eddy currents in the laminations. It has been found that in many simulation tests the representation of hysteresis is not necessary and those situations have been described where the modeling of hysteresis appears to be more meaningful.

• OSTI ID: 39960
• Report Number(s): CONF-940702--
• Journal Information: IEEE Transactions on Power Delivery, Journal Name: IEEE Transactions on Power Delivery Journal Issue: 1 Vol. 10; ISSN 0885-8977; ISSN ITPDE5
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
COMPUTERIZED SIMULATION
HYSTERESIS
MATHEMATICAL MODELS
POWER LOSSES
TRANSFORMERS