Voltage Distribution on Transformer Windings Subjected to Lightning Strike Using State-Space Method
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Dosyalar
Tarih
2025-02-04
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
MDPI AG
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Transient analysis in power systems is essential for identifying deficiencies in the system, as well as for the protection and design of equipment. Transients can arise from natural events or network operations; in either case, they have the potential to cause significant damage to transmission lines, protection devices, generators, or transformers. This study examines a 20 kA, 1.2/50 mu s lightning strike on a distributed-parameter transmission line connected to a power transformer. The voltage distributions across the winding sections on the neutral grounded high-voltage side of a disc-structured power transformer were obtained using the state-space method. An equivalent circuit for the state-space model was also developed in the Alternative Transients Program-Electromagnetic Transients Program (ATP-EMTP), and the results from both methods were compared. Both approaches revealed that the voltage waveforms in the transformer's winding sections were consistent, with the voltage distribution decreasing linearly. Additionally, the voltage-current waves reached the transformer with a specific delay, depending on the characteristics of the transmission line and the location of the lightning strike. The impact of an increase in the grounding resistance value on the high-voltage side of the transformer on voltage distribution and peak voltage levels was examined. The proposed method effectively captures the voltage-current behavior of the transmission line and transformer windings during transient conditions. It is concluded that the state-space method serves as a viable alternative for transient analysis in power systems and can enhance the design of protection equipment and winding insulation studies.
Açıklama
Anahtar Kelimeler
lightning strike, power transformer, state-space method, transient analysis, transmission line, voltage distribution
Kaynak
Applied Sciences
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
15
Sayı
3
Künye
Arı, İ., & Mamiş, M. S. (2025). Voltage Distribution on Transformer Windings Subjected to Lightning Strike Using State-Space Method. Applied Sciences, 15(3), 1569.
