论文信息 - Numerical simulation of transient force and eddy current loss in a 720-MVA power transformer

Numerical simulation of transient force and eddy current loss in a 720-MVA power transformer

The transient eddy current fields are short-circuit forces upon the coils of large power transformers are analyzed. The proposed approach is based on the A-V-A formulation in which the eddy current field and the electric circuit equations are solved simultaneously. The effectiveness of a magnetic bypass plate near the coils ends for reducing the eddy current loss and the local overheating is discussed. A simulation to study the transient short-circuit behavior of a 720-MVA power transformer using the proposed coupled approach is reported.

S.L. Ho | Y. Li | R.Y. Tang | H.C. Wong | S.H. Wang

[1] Gérard Meunier,et al. 3D modeling of electromagnets fed by alternating voltage sources , 1992 .

[2] Adel Razek,et al. Coupling of saturated electromagnetic systems to non-linear power electronic devices , 1988 .

[3] E. Strangas,et al. Coupling the circuit equations to the non-linear time dependent field solution in inverter driven induction motors , 1985 .

[4] Willy Legros,et al. A coupling between electric circuits and 2D magnetic field modeling , 1993 .

[5] Tang Yun-Qiu,et al. Numerical calculation of short circuit electromagnetic forces on the transformer winding , 1990 .

[6] Tang Renyuan,et al. Transient simulation of power transformers using 3D finite element model coupled to electric circuit equations , 2000 .