Conceptual Design of a Saturated Iron-Core Superconducting Fault Current Limiter for a DC Power System

Dao, Van Quan; Lee, JaeIn; Kim, Chang-Soon; Park, Minwon

doi:10.1109/tasc.2020.2968532

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…The fault current simulation result is shown in Figure 3b. The detailed design of the SI-SFCL covered in this session was performed in the author's previous work [36,37]. The SI-SFCL has a structure similar to that of a singlephase transformer as described in Section 2.1.…”

Section: Design and Fabrication Of The Lab-scale Si-sfcl For DC Power Systemmentioning

confidence: 99%

Combined Operation Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter and Circuit Breaker for an HVDC System Protection

et al. 2021

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Recently, in order to overcome the difficulties of interrupting fault currents in multi-terminal direct current systems (MTDC), studies combining a saturated iron-core type superconducting current limiter (SFCL) and a direct current circuit breaker (DCCB) have been conducted. However, the effect of inductance change of the SI-SFCL on the interrupting time of the DCCB during fault has not been studied yet. In this paper, the interrupting time delay caused by the dynamic behavior of the inductance change during the fault current blocking process of the SI-SFCL combined with a DCCB was analyzed through experiments and a new fault detection method considering this phenomenon was proposed. After designing and manufacturing the laboratory-scale SI-SFCL and DCCB, a fault current interrupting test was performed and the inductance change pattern of the SI-SFCL was analyzed. Based on the analysis results, a new fault detection technique was proposed to alleviate the interruption time delay that occurs when applying the combined protection system to a MTDC, and its effectiveness was verified through a simulation. These results will be useful for planning protection coordination strategies when introducing a SI-SFCL in combination with a DCCB in actual MTDC systems.

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Section: Design and Fabrication Of The Lab-scale Si-sfcl For DC Power Systemmentioning

confidence: 99%

Combined Operation Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter and Circuit Breaker for an HVDC System Protection

et al. 2021

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“…We decided to perform the SI-SFCL in a 500 V, 50 A DC power system. The initial specifications of the designed SI-SFCL were determined, as shown in Table 1, and the detailed design process was presented in the previous research article [27]. The major drawbacks of the SI-SFCL technology include its large volume, heavy weight, high cost, complex design of the SSC, and losses in the iron-core and CPC.…”

Section: Configuration and Specifications Of The Lab-scale Si-sfclmentioning

confidence: 99%

“…Based on the targeted fault current limit, the SSC was designed in terms of its size, number of turns, operating current, operating temperature, required wire length, and total wire cost. The size and shape of the SSC depends on the size of the iron-core, which is calculated based on the rated power of the DC power system [27]. The selection of superconducting wire type is an important issue to minimize the cost of the SSC design.…”

Section: Design Of the Sscmentioning

confidence: 99%

Design and Performance Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter for DC Power Systems

et al. 2020

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A saturated iron-core superconducting fault current limiter (SI-SFCL) can significantly limit the magnitude of the fault current and reduce the stress on circuit breakers in direct current (DC) power systems. The SI-SFCL consists of three main parts: one magnetic iron-core, one normal conductive primary coil (CPC), and one superconducting secondary coil (SSC). This paper deals with the design options for the coil system of the SI-SFCL and confirms their operating characteristics through a physical experiment. The electromagnetic characteristics and operational features of the SI-SFCL was analyzed by a 3D finite element method simulation model. The design of the SSC was based on shape, wire types, required fault current limit and protection aspects. In the CPC, the bobbin was designed based on material selection, cost, structural design, and the effects of the SI-SFCL on the fault current limit. Based on these simulation results, a laboratory-scale SI-SFCL was developed, specifically fabricated to operate on a 500 V, 50 A direct current (DC) power system. In the experiment, the operating characteristics of each coil were analyzed, and the fault current limit of the SI-SFCL according to the operating currents of the SSC and bobbin design of the CPC were confirmed. Finally, the cost analysis of the SI-SFCL with the proposed design options of the coil system was implemented. The results obtained through this study can be effectively used to large-scale SI-SFCL development studies for high-voltage direct current (HVDC) power systems.

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“…Some simulation models for the SIC-SFCL based on the Finite Element Method (FEM) and in the Finite Element Analysis (FEA) are presented in the literature [10,18,[22][23][24][24][25][26][27]. These papers discuss the optimization of the iron-core, the applications of SIC-SFCL considering different types of short circuits, and the application of the SIC-SFCL in DC short circuits.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization for the superconducting bias coil of a saturated iron core fault current limiter using the T-A formulation

Santos

Sass

Sotelo

et al. 2021

Supercond. Sci. Technol.

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The short-circuit levels have increased considerably in transmission and distribution systems in the last years. Fault current limiter (FCL) devices are a potential solution to this problem. Among several FCL topologies, this group has good experience in the use of superconducting fault current limiters (SFCL) to reduce the electrical current during short-circuits. The literature also presents studies of the saturated iron core superconducting fault current limiter (SIC-SFCL) topology employing mathematical modeling and prototypes design. Some of them have shown promising results, including the construction of pilot prototypes in medium and high voltage substations. The SIC-SFCL simulation studies presented optimal topologies that reduce the amount of ferromagnetic material used in the core and represent well the behavior of this limiter. The finite element method and the finite element analysis are suitable to model the SIC-SFCL. However, a more detailed study focusing on the optimization of the DC bias superconducting coil of the SIC-SFCL has not been presented in the literature yet. In this context, this work proposes a multi-objective optimization method using the Nelder–Mead algorithm to find an optimal geometry for the superconducting coil. In this optimization, the objectives functions are: to maximize the critical current density in the high-temperature superconductor (HTS), minimize the voltage drop in the copper winding, minimize the current through the DC biased superconducting winding, and minimize the price of the HTS superconducting winding. Before implementing the multi-objective optimization algorithm, we have tested a non-superconducting saturated iron core prototype and used the results to validate the simulation models. After that, we have replaced the DC copper winding with an HTS coil in the simulations and initiate the optimization process. Results show that constructing the DC bias superconducting coil using the minimum possible fill factor might not be the best choice.

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Conceptual Design of a Saturated Iron-Core Superconducting Fault Current Limiter for a DC Power System

Cited by 19 publications

References 13 publications

Combined Operation Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter and Circuit Breaker for an HVDC System Protection

Combined Operation Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter and Circuit Breaker for an HVDC System Protection

Design and Performance Analysis of a Saturated Iron-Core Superconducting Fault Current Limiter for DC Power Systems

Multi-objective optimization for the superconducting bias coil of a saturated iron core fault current limiter using the T-A formulation

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