Characterizing power transformer frequency responses using bipolar pseudo-random current impulses
The behaviour of a power transformer is complex and difficult to predict during transient conditions or during operation at frequencies below or above its nominal frequency, a phenomenon common in renewable energy plants due to harmonic distortion. Furthermore, the accuracy of a power system simulat...
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| Format: | EJournal Article |
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Institute of Advanced Engineering and Science,
2021-12-01.
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| Online Access: | Get Fulltext |
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| LEADER | 02643 am a22002893u 4500 | ||
|---|---|---|---|
| 001 | IJPEDS_21514_13587 | ||
| 042 | |a dc | ||
| 100 | 1 | 0 | |a Mwaniki, Fredrick |e author |
| 100 | 1 | 0 | |e contributor |
| 700 | 1 | 0 | |a Sayyid, Ahmed A. |e author |
| 245 | 0 | 0 | |a Characterizing power transformer frequency responses using bipolar pseudo-random current impulses |
| 260 | |b Institute of Advanced Engineering and Science, |c 2021-12-01. | ||
| 500 | |a https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/21514 | ||
| 520 | |a The behaviour of a power transformer is complex and difficult to predict during transient conditions or during operation at frequencies below or above its nominal frequency, a phenomenon common in renewable energy plants due to harmonic distortion. Furthermore, the accuracy of a power system simulation depends on the models of critical subsystems such as the power transformers. This paper presents the use of a unique excitation waveform comprising of pseudo-random current impulses to accurately identify the wideband characteristics of a power transformer. By injecting the excitation waveform to the relevant transformer terminals, frequency responses are determined by cross-correlation of the perturbation signal, and the measured response. Compared to the traditional transformer identification methods, the pseudo-random current impulses offer a wideband excitation with a higher degree of controllability such that its spectral energy can be focused in the frequency band of interest. The proposed method was investigated on a 16 kVA, 22 kV/240 V single-phase transformer. The obtained wideband frequency responses provide useful information in harmonic penetration and over-voltage studies and are also used to estimate, with a high degree of accuracy, the lumped parameters of the equivalent transformer broadband circuit model. | ||
| 540 | |a Copyright (c) 2021 Institute of Advanced Engineering and Science | ||
| 540 | |a http://creativecommons.org/licenses/by-sa/4.0 | ||
| 546 | |a eng | ||
| 690 | |a Excitation signals; Frequency response; Harmonics; Parameter estimation; Power quality; Power transformer | ||
| 655 | 7 | |a info:eu-repo/semantics/article |2 local | |
| 655 | 7 | |a info:eu-repo/semantics/publishedVersion |2 local | |
| 655 | 7 | |2 local | |
| 786 | 0 | |n International Journal of Power Electronics and Drive Systems (IJPEDS); Vol 12, No 4: December 2021; 2423-2434 | |
| 786 | 0 | |n 2722-256X | |
| 786 | 0 | |n 2088-8694 | |
| 786 | 0 | |n 10.11591/ijpeds.v12.i4 | |
| 787 | 0 | |n https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/21514/13587 | |
| 856 | 4 | 1 | |u https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/21514/13587 |z Get Fulltext |