A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems

Sitbon, Moshe; Baraf, Chen; Paz, Yuval; Tal, Nikolay; Vulfovich, Andrey

doi:10.3390/pr13113495

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A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems

by

Moshe Sitbon

^1,*

,

Chen Baraf

¹,

Yuval Paz

²,

Nikolay Tal

² and

Andrey Vulfovich

³

¹

Department of Electrical and Electronics Engineering, Ariel University, Ariel 40700, Israel

²

SolarEdge, Herzliya 4673335, Israel

³

School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel

^*

Author to whom correspondence should be addressed.

Processes 2025, 13(11), 3495; https://doi.org/10.3390/pr13113495

Submission received: 5 July 2025 / Revised: 4 October 2025 / Accepted: 24 October 2025 / Published: 30 October 2025

(This article belongs to the Special Issue New Challenges and Solutions to Improve Energy and Computational Efficiency in Smart Grids)

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Abstract

This paper presents a new method for detecting phase loss in Ynd transformers by integrating a Backup Interface Unit (BUI). Traditional detection techniques often struggle to reliably distinguish between genuine phase loss events and current imbalances caused by load variations, harmonics, or asymmetrical operating conditions, which can lead to delayed response or false triggering. The proposed method combines Clarke and Park transformations with controlled off-grid transition tests to enhance fault identification and validation. By applying these techniques, the system achieves higher sensitivity to true phase loss while maintaining robustness against normal operating disturbances. Simulation and laboratory experimental results confirm improved detection accuracy, reduced false positives, and faster protection response compared to conventional approaches. In addition, the method ensures continued operation and voltage stability during faults, which is critical for maintaining power quality and equipment safety. These advantages make the approach highly suitable for modern industrial facilities and smart grid applications where reliability and resilience are key requirements.

Keywords: phase loss; Backup Interface; current imbalance; false positives

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MDPI and ACS Style

Sitbon, M.; Baraf, C.; Paz, Y.; Tal, N.; Vulfovich, A. A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems. Processes 2025, 13, 3495. https://doi.org/10.3390/pr13113495

AMA Style

Sitbon M, Baraf C, Paz Y, Tal N, Vulfovich A. A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems. Processes. 2025; 13(11):3495. https://doi.org/10.3390/pr13113495

Chicago/Turabian Style

Sitbon, Moshe, Chen Baraf, Yuval Paz, Nikolay Tal, and Andrey Vulfovich. 2025. "A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems" Processes 13, no. 11: 3495. https://doi.org/10.3390/pr13113495

APA Style

Sitbon, M., Baraf, C., Paz, Y., Tal, N., & Vulfovich, A. (2025). A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems. Processes, 13(11), 3495. https://doi.org/10.3390/pr13113495

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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A New Approach for Phase Loss Detection and Protection in Ynd Transformers Primary Using Backup Interface Systems

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