Simulations of Resistive and Air Coil SFCLs in a Power Grid

Sousa, Wescley Tiago Batista de; Polasek, A.; Assis, Tatiana M. L.; Andrade, R. de; Noë, M.

doi:10.1109/tasc.2014.2387311

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…In order to avoid such long periods of blackouts the HTS cable must be connected in series with a SFCL device in order to avoid high temperatures of the HTS tapes in the cable, which will not recover its superconducting state before the systems starts to operate normally. Besides avoiding high temperature inside the cable, SFCL devices may recover its superconducting state in few milliseconds [53,54] enabling a circuit breaker to be quickly reclosed. In fact, the cable of the AmpaCity project is connected in series with a SFCL device to prevent such issues [14].…”

Section: Resultsmentioning

confidence: 99%

An open-source 2D finite difference based transient electro-thermal simulation model for three-phase concentric superconducting power cables

Sousa

Shabagin

Kottonau

et al. 2020

Supercond. Sci. Technol.

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Advances in superconductor technology make the prospect of economical operation of high temperature superconducting (HTS) power cables a practical concept for grid applications in urban centers. With more advanced cable designs being developed and commercialized, their geometrical features and dynamic behavior are becoming increasingly complicated to be modeled. This brings new challenges as the complex structure of HTS power cables significantly increases the computation power needed to perform simulations. In this paper we develop a two-dimensional open source simulation code based on the finite difference method which is solved by means of the alternating direction implicit routine. The algorithm has been written in MatLab programming language. The method improves computational performance and simulation time. In addition, this enables the creation of open-source simulation codes. A three-phase concentric HTS cable design has been chosen for the development of the code, nevertheless the model can be employed for any cable design. The results indicate an efficient, stable and powerful simulation code. During the development no numerical instabilities have been found. Besides that, the model is able to deliver quantities that are experimentally difficult to access. Simulation files are available for the scientific community on the HTS Modeling Workgroup webpage. 1 1 Simulation files can be downloaded.here.

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Section: Resultsmentioning

confidence: 99%

An open-source 2D finite difference based transient electro-thermal simulation model for three-phase concentric superconducting power cables

Sousa

Shabagin

Kottonau

et al. 2020

Supercond. Sci. Technol.

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“…Knowledge of the SCFCL quench time and relay processing time is critical before commenting on the effects of SCFCL on the relays. For estimation of time–current characteristics, an SCFCL model based on [16] is developed. The behaviour of the SCFCL is observed for various DC fault current values (as presented in [17]).…”

Section: Resultsmentioning

confidence: 99%

Line distance protection in the presence of SCFCL

Thute¹,

Bahirat²,

Khaparde³

et al. 2019

IET Generation Trans & Dist

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There is an increase in fault current levels seen by utilities due to grid expansion and the addition of new resources. Installation of superconducting fault current limiter (SCFCL) at transmission voltage levels is being explored to reduce the fault levels. The SCFCL limits the fault current by inserting an additional impedance in the network, which may impact the protection system. This paper discusses the impacts of SCFCL on the operation of line distance protection. It is observed that operation of SCFCL may not impact all the distance relays in the substation and near-by substation in the same way, thus a boundary definition method is proposed in this study to identify the affected relays. The definitions of boundary condition based on steadystate fault current values and critical current of the SCFCL are proposed in this study. The impact of SCFCL on the line distance relays which manifest as underreaching of the relays and may also lead to coordination issues and erroneous operation. An implementation method for mitigation which is compatible with existing substation relays is proposed and demonstrated to ensure proper operation of the relays. The proposed mitigation ensures that the system integrity is maintained during faults.

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“…Simulations are useful for allowing the concepts and ideas to verify and understood more easily. This type of research simulation has been reported in previous works [29]- [35]. This method's main objective is to ensure the theoretical method and observe the effects of magnetic field strength, magnetic flux lines, magnetic flux density, and magnetic vector plots.…”

Section: B Fem Calculationsmentioning

confidence: 97%