Experimental Methods and Equivalence Research on Inter-Turn Short Circuits in Power Transformers

Xuelong Li, Chun Yang, Yuanming Shuai, Dongyang Wu, Zhengyang Zhang and Lanjun Yang ()
Additional contact information
Xuelong Li: School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Chun Yang: TBEA Electrical Equipment Group Co., Ltd., Tianjin 301700, China
Yuanming Shuai: TBEA Electrical Equipment Group Co., Ltd., Tianjin 301700, China
Dongyang Wu: TBEA Electrical Equipment Group Co., Ltd., Tianjin 301700, China
Zhengyang Zhang: TBEA Co., Ltd., Changji 831100, China
Lanjun Yang: School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2025, vol. 18, issue 20, 1-16

Abstract: Inter-turn short-circuit faults in power transformers generate enormous short-circuit currents within the affected turns, making full-scale experimental investigations impractical. To address this issue, this study proposes an experimental method utilizing a third external short-circuit winding to simulate inter-turn faults through structural improvements in winding configuration and conductor current-carrying capacity. A simulation calculation model for transformer inter-turn short circuits was first established to investigate the equivalence between the proposed equivalent fault model and actual fault conditions under varying short-circuit positions and proportions. Simulation results demonstrate that both models exhibit consistent primary/secondary winding currents, short-circuit turn currents, and spatial radial leakage magnetic field distributions post-fault, with average errors less than 5%. Subsequently, an experimental platform for inter-turn short-circuit fault simulation was constructed. Current and leakage magnetic field measurements under different fault positions and proportions were validated against simulation data, confirming the proposed method’s equivalence. This approach provides an effective pathway for investigating fault characteristics and monitoring methodologies of transformer inter-turn short circuits.

Keywords: inter-turn short-circuit experiment; short-circuit current; leakage magnetic field distribution; power transformers; model simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/20/5453/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/20/5453/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:20:p:5453-:d:1772852

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().