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- Title
电力变压器三维瞬态漏磁场及电动力仿真分析.
- Authors
穆龙; 陈伯根; 蔡锋; 吴丽明; 杜国安; 兰生
- Abstract
In order to analyze the transient magnetic field and transient electrodynamic characteristics of transformer windings under short-circuit impact, according to the theory of leakage magnetic field of transformer windings and the principle of calculation of short-circuit electrodynamics, using the finite element analysis software for calculating electromagnetic fields, a SSZ11-50000/110 the three-winding power transformer is the research object, the simulation model and short-circuit calculation equation of the transformer winding are established, and the simulation analysis of the transient leakage magnetic field and transient short-circuit electromotive force of the transformer is carried out. When the medium-voltage side winding of the transformer high-medium operation mode has a ground short-circuit fault, the transient leakage magnetic field of the winding and the distribution law of the axial and radial transient short-circuit electromotive force of the winding are calculated. The simulation results show that during the short-circuit process of the winding, the leakage magnetic field and the electromotive force distribution are related to time and space, and all appear at the maximum value at t=0.01 s. At any time, the axial magnetic induction intensity is small on both sides and large in the middle; the radial magnetic induction intensity between the medium-voltage and high-voltage windings is approximately “Λ” shaped. The distribution law of the radial electrodynamic direction of the windings on the inner side of the iron core window and the outer side of the iron core window is different. The axial electromotive force of the winding is approximately symmetrically distributed in the center, and the electromotive force on both sides is the largest, and the smallest is near the middle of the winding. This study provides a reference for preventing transformer winding deformation and improving design.
- Subjects
ELECTROMOTIVE force; ELECTROMAGNETIC induction; MAGNETIC flux leakage; ELECTROMAGNETIC fields; MAGNETIC fields; SHORT circuits; POWER transformers
- Publication
Journal of Harbin University of Science & Technology, 2021, Vol 26, Issue 5, p104
- ISSN
1007-2683
- Publication type
Article
- DOI
10.15938/j.jhust.2021.05.014