Bibliographic Details
| Title: |
Revisited Concept of Three-Phase Transformers' Short-Circuit Resistances in Light of the Institute of Electric and Electronics Engineers (IEEE) Standard C57.110-2018. |
| Authors: |
León-Martínez, Vicente, Peñalvo-López, Elisa, Sáiz-Jiménez, Juan Ángel, León-Vinet, Amparo |
| Superior Title: |
Applied Sciences (2076-3417); Apr2024, Vol. 14 Issue 7, p3126, 22p |
| Subject Terms: |
ELECTRONICS engineers, ELECTRIC lighting, ELECTRICAL load |
| Abstract: |
Short-circuit resistances are transformer parameters that characterize the electrical load losses and correct operation of these machines. However, the traditional concept of short-circuit resistance, independent of the harmonic frequencies, has been superseded by present transformer standards. Hence, new expressions for short-circuit resistances of three-phase transformers have been developed in this article based on the IEEE Standard C57.110-2018 and are presented jointly with the losses that these resistances characterize. These refer to the secondary effective short-circuit resistance of each phase ( R c c , z ), of each harmonic ( R c c , h ), and the non-fundamental frequency combined harmonics ( R c c , H z ). Likewise, the harmonic loss factor ( H L F z % ) has been established to determine the importance of the harmonics in each phase's load losses. The application of these short-circuit resistances to the calculation of the load losses for a 630 kVA transformer from an actual residential distribution network has shown that the same values are obtained as with the IEEE Standard C57.110-2018, and they are 48.75% higher than those recorded with the traditional short-circuit resistances when the current distortion rates are 36.47%. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
