Thermoelectromagnetic Lumped-Parameter Model of High Temperature Superconductor Generators for Transient Stability Analysis

Baez-Munoz, Alejandro; Trillaud, F.; Rodriguez-Rodrıguez, Juan Ramón; Castro, Luis M.; Escarela‐Perez, R.

doi:10.1109/tasc.2021.3060696

Cited by 6 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The previous studies showed the utility of lumped-parameters models and coupled FEM-circuit models with different power-law refinements. For the lumped-parameters models, the dependence of I c and n index on temperature and/or magnetic flux density (if the application requires [39]) is employed for which there is not enough experimental data to derive empirical law for the n index dependencies and to some extent for the critical current, particularly above 77.3 K. These models allow simulating the behavior of the full superconducting device as part of a power system. For simulation runs of several power cycles considering various parallel-connected tapes, the computation time extends to about 25 min for the most demanding r-SFCL case study.…”

Section: Discussionmentioning

confidence: 99%

“…It was implemented to tackle the modelling of resistive Superconducting Fault-Current Limiters (r-SFCL). It has been the basis for developing a generic thermoelectric model of REBCO tapes to simulate power systems based on superconductors, including resistive or inductive components [24,39].…”

Section: Extension Of Power-law Modelmentioning

confidence: 99%

“…where I c,T/B and n T,B are empirical functions that can be fitted to actual measurements. T sc is the temperature of the superconductor layer, andB sc is the average magnitude of the magnetic flux density over the tape as proposed in [39]. Some power applications do not present significant magnetic field other than the self-field of each individual tape so that I c and n index dependencies can be reduced to,…”

Section: Extension Of Power-law Modelmentioning

confidence: 99%

See 2 more Smart Citations

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

2021

Self Cite

View full text Add to dashboard Cite

The manufacturing of commercial REBCO tapes, REBCO referring to Rare-earth barium copper oxide, has matured enough to lead to a variety of applications ranging from scientific instruments to electric power systems. In particular, its large current density with a high n index and low hysteresis losses make it a strong candidate for specific applications relying on the dependence of its resistance on current. Despite its advantages, there are still issues that remain to be addressed, such as the scarcity of experimental data for the basic characteristics of the superconductor over a wide range of temperature and applied magnetic field, the homogeneity of these characteristics along the conductor length, as well as the anisotropy of the critical current and n index with respect to the direction of the applied magnetic field. To better utilize the technology, it is therefore sensible to understand the relevancy of these issues so that one could simulate as accurately as possible the physics of the superconductor, at least the dynamics that may impact the correct operation of the superconducting device. There are different levels of modelling to achieve such a goal that can either focus on the performance of the superconductor itself, or on the whole device. The present work addresses some of the latest developments in the modelling of commercial REBCO tapes in power systems with a particular focus on the thermoelectric behavior of superconducting devices connected to external circuits. Two very different approaches corresponding to two different scales in the modelling of superconducting devices are presented: (1) analysis using equivalent models and lumped parameters to study the thermoelectric response of superconducting devices as a whole, (2) Finite Element Analysis (FEA) to compute distributed fields such as current density, magnetic flux density and local losses in tapes. In this context, this paper reviews both approaches and gives a broad variety of examples to show their practical applications in electric power systems. Firstly, they show the relevance of the technology in power systems engineering. Secondly, they allow inferring the necessary level of model details to optimize the operation of superconducting power devices in power grids. This level of details relies completely on the knowledge of some basic measurable properties of superconducting tapes (critical current and n index) and their cooling conditions.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Extension Of Power-law Modelmentioning

confidence: 99%

Section: Extension Of Power-law Modelmentioning

confidence: 99%

See 1 more Smart Citation

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Together these would allow for useful full-system design and optimization, which has been identified as an important issue to be addressed for FPs [14]. Such an effective-circuit approach for system-level modelling is utilized in other areas of superconducting power electronics as well [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effective circuit modelling and experimental realization of an ultra-compact self-rectifier flux pump

Mallett

Venuturumilli

Geng

et al. 2023

Supercond. Sci. Technol.

View full text Add to dashboard Cite

This paper presents experimental and modelling results of an ultra-compact self-rectifier flux pump energizing a superconducting coil. The device fits inside a volume of 65x65x50 mm and generates up to 320 A dc through the coil and a peak output voltage up to 60 mV. We also develop and present a full electromagnetic effective circuit model of the flux pump and compare its predictions to the experimental results. We show that our model can reproduce accurately the charging of the load coil and that it reproduces the systematic dependence of the maximum load coil current on the input current waveform. The experiments and modelling together show also the importance of dc-flux offsets in the transformer core on the final achievable current through the coil. The miniaturization possible for this class of flux pump and their minimal heat-leak into the cryogenic environment from thermal conduction make them attractive for applications with demanding size, weight and power limitations. Our effective circuit model is a useful tool in the understanding, design and optimization of such flux pumps which will accelerate their progression from research devices to their application.

show abstract

“…High-temperature superconducting (HTS) coils are widely used in superconducting generators, superconducting transformers, superconducting fault current limiters (SF-CLs), superconducting magnetic energy storage (SMES) and wireless power transmission (WPT) [1][2][3][4][5]. In some extreme cases, such as the most serious fault of a three-phase short circuit in a superconducting generator, the superconducting coil will experience a large fault current.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fault Current and Different Oscillating Magnetic Fields on Electromagnetic–Thermal Characteristics of the REBCO Coil

et al. 2022

View full text Add to dashboard Cite

When the high-temperature superconducting (HTS) REBCO (rare-earth barium copper oxide) coil is applied in a power system, a large amount of heat may be generated due to the short-circuiting of the system, resulting in the thermal instability of the coil. Moreover, under complex working conditions, the oscillating external magnetic field will further aggravate the coil quench. In this paper, the electromagnetic–thermal coupling model is used to analyze the loss, current distribution and temperature distribution of the REBCO coil under short-circuit fault conditions and oscillating external magnetic fields. In order to get closer to the actual situation, the modeling of the superconducting tape adopts the real tape structure, and the resistivity of the superconductor is described by the modified E-J relationship. Four cases are considered for the oscillating external magnetic field, i.e., sine, triangle, sawtooth and square cases. This model has certain significance as a reference for understanding the thermal stability of coils in extreme cases.

show abstract

Thermoelectromagnetic Lumped-Parameter Model of High Temperature Superconductor Generators for Transient Stability Analysis

Cited by 6 publications

References 23 publications

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

Effective circuit modelling and experimental realization of an ultra-compact self-rectifier flux pump

Influence of Fault Current and Different Oscillating Magnetic Fields on Electromagnetic–Thermal Characteristics of the REBCO Coil

Contact Info

Product

Resources

About