Simulated Analysis and Experimental Study of Winding Leakage Magnetic Field in Short Circuit of Three-Phase Three-Column Dry-Type Transformer

• Published in: 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD) pp. 1 - 2
• Main Authors: Li, Yan, Du, Jian, Jing, Yongteng, Zou, Dexu
• Format: Conference Proceeding
• Language: English
• Published: IEEE 16.10.2020
• Subjects: dry-type transformer; experimental study; Finite element analysis; Integrated circuit modeling; leakage magnetic field; Magnetic analysis; Magnetic circuits; Magnetic fields; Magnetic flux leakage; short- circuit condition; Windings
• DOI: 10.1109/ASEMD49065.2020.9276272

The distribution and magnitude of leakage magnetic field of the winding in the short-circuit condition of the transformer determine the distribution and magnitude of the short-circuit electromagnetic force. It is related to the short- circuit strength and stability of the transformer winding and even jeopardizes the safety and reliability of the operation of the transformer and the power grid system. This paper takes a three-phase three-column dry-type transformer as the research object, establishes its three-dimensional finite element analysis model, and simulates the three-dimensional leakage magnetic field of three-phase winding under different short circuit conditions. The radial and axial magnetic flux distribution of different windings under different short-circuit conditions are compared and analyzed, which lay a foundation for exploring the location of damage response of transformer under different short-circuit conditions. Finally, experimental data verify the correctness of the simulated calculation and the accuracy of the distribution law.