Table 1.
Comparison between MTL, lumped circuit and FEM approaches.
Fig 1.
(A) Side view. (B) top view of the HV and LV windings. (C) cross-sectional view for the LV and HV windings. (D) RLC equivalent circuit for the HV winding of the 33/11 kV, 30 MVA transformer.
Table 2.
HV winding geometry specification of the 33/11 kV, 30 MVA transformer.
Fig 2.
FRA measurement configurations: (A) end-to-end short circuit HV. (B) FRA analyzer.
Fig 3.
Procedure for simulated frequency response based on MTL model.
Fig 4.
MTL of a winding of a transformer having input and output V-I.
Table 3.
RLC parameters of the HV winding for the 33/11 kV, 30 MVA transformer.
Fig 5.
Procedure for simulated frequency response based on FEM.
Fig 6.
RLC parameters of the 33/11 kV, 30MVA transformer based on Ansys Q3D: (A) capacitance; (B) spice capacitance; (C) AC inductance; (D) AC resistance; (E) DC inductance; (F) DC resistance matrices.
Fig 7.
An 8-disc model of the transformer winding.
Fig 8.
External circuit coupled with a 3-D winding model.
Fig 9.
A winding Ansys Q3D model coupled with the Ansys Simplorer circuit for 8 discs.
Fig 10.
Ansys Q3D coupled model with the Ansys Simplorer circuit for 96 discs to obtain the frequency response.
Fig 11.
The comparison of simulated frequency response based on MTL model and measurement.
Table 4.
ASLE and RMSE errors for comparison of simulated frequency response based on MTL model and measurement.
Fig 12.
The comparison of simulated frequency response based on FEM model and measurement.
Table 5.
ASLE and RMSE errors for comparison of simulated frequency response based on FEM model and measurement.