Numerical model of the 10 kVA superconducting transformer

Influence of the HTS Winding Tape on Limiting the Transient Currents in Superconducting Transformers

“…The computer model of the single-phase HTS 21 MVA 70/10.5 kV transformer was developed on the basis of a verified computer model of the HTS 10 kVA 230/115 V transformer with its physical counterpart in the Laboratory of Superconducting Technologies in Lublin, Electrotechnical Institute in Warsaw [6]. The waveforms obtained from the measurement of the no-load condition, the load condition, and the short-circuit condition as well as the transient waveforms described in [13,17] were subjected to verification. A comparison of the results obtained from the computer model with experimental waveforms for HTS transformer of the power 10 kVA with the SCS4050 tape windings is shown in Figure 1 for the inrush current and in Figure 2 for the short-circuit current.…”

“…Energies 2022, x, x FOR PEER REVIEW 3 of 17 condition as well as the transient waveforms described in [13,17] were subjected to verification. A comparison of the results obtained from the computer model with experimental waveforms for HTS transformer of the power 10 kVA with the SCS4050 tape windings is shown in Figure 1 for the inrush current and in Figure 2 To develop a computer model of a single-phase transformer HTS 21 MVA 70/10.5 kV, a computational design was used, taking into account the geometric, electrical, and thermal parameters of the transformer and its windings.…”

“…The proposed computer model of a superconducting transformer assumes that the HTS tape heats up evenly throughout the winding, the entire system is cooled equally, the heterogeneity of the HTS tape along its length is ignored, resulting from disturbances in the production process, and the influence of the heterogeneity of the magnetic field in the winding on the tape's properties is neglected. However, the magnetic field in a large Energies 2022, x, x FOR PEER REVIEW 3 of 17 condition as well as the transient waveforms described in [13,17] were subjected to verification. A comparison of the results obtained from the computer model with experimental waveforms for HTS transformer of the power 10 kVA with the SCS4050 tape windings is shown in Figure 1 for the inrush current and in Figure 2 for the short-circuit current.…”

“…In recent years, there have been several articles [10][11][12][13][14][15] that have described the transition of superconducting tapes in HTS transformer windings from superconducting to resistive during a short-circuit. In the literature, there are also works presenting methods of calculating the switching current in superconducting transformers [15][16][17][18][19][20]. The experimental results of the current waveforms of superconducting transformers for the operational short-circuit are presented in [10][11][12]15], while for the process of connecting to the network, see studies [15,16,19,20].…”

“…The work mainly describes the operation and laboratory measurements of physical models, and the design of superconducting transformers is mainly based on the electromagnetic analysis of the finite element method (FEM). However, circuit modelling using PSpice provides satisfactory results and is faster compared to FEM analysis [17,18]. There are also some papers describing the models, design, and construction of HTS transformers of both small and considerable power [21][22][23][24][25][26][27][28][29][30].…”