AC Loss and Thermal Stability of HTS Model Coils for a 600 kJ SMES

Park, Myungjin; Kwak, Sang-Yeop; Kim, Woo-Seok; Lee, Seoung-Wook; Lee, Ji-Kwang; Han, Jin-Yi; Choi, Kyeongdal; Jung, Hyun-Kyo; Seong, K.C.; Hahn, Song–Yop

doi:10.1109/tasc.2007.899107

Cited by 20 publications

(2 citation statements)

References 5 publications

(5 reference statements)

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“…One of the main obstacles to the development of dry-cooled SMES systems is the heat load removal due to AC loss of the superconductor during fast charging and discharging cycles at high power. Accurate knowledge of the amount and distribution of AC loss in the coil is of paramount importance for the sizing and the design of the cooling system and for assessing the possible operational limits of the technology, while substantial work has been conducted for predicting AC loss of SMES coils (or fast ramping coils in general) made of 2G HTS tapes (ReBCO coated conductors) [10,[20][21][22][23][24], little work has been conducted for calculating the AC loss of SMES coils made of multifilamentary MgB 2 conductors. This paper investigates the space-and time-distribution of AC loss of an MgB 2 SMES coil during rated operation at 200 kW.…”

Section: Introductionmentioning

confidence: 99%

Calculation of AC Losses in a 500 kJ/200 kW Multifilamentary MgB2 SMES Coil

et al. 2023

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SMES technology based on MgB2 superconductor and cryogenic-free cooling can offer a viable solution to power-intensive storage in the short term. One of the main obstacles to the development of dry-cooled SMES systems is the heat load removal due to the AC loss of the superconductor during fast charging and discharging cycles at high power. Accurate knowledge of the amount and distribution of AC loss in the coil is of paramount importance for the sizing and the design of the cooling system and for assessing the possible operational limits of the technology. In this manuscript, the AC loss of a 500 kJ/200 kW multifilamentary MgB2 SMES during charge–discharge cycling at full power is numerically investigated. The methodology and assumptions of the calculation are briefly resumed, and numerical results are reported and discussed in detail. In particular, the time profile and the distribution of the dissipated power all over the coil are reported. An average dissipation of 85.5 mW/m is found all over the coil during one charge–discharge cycle at full power, with a peak of 150.1 mW/m in the turns lying at the ends of the coil.

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Section: Introductionmentioning

confidence: 99%

Calculation of AC Losses in a 500 kJ/200 kW Multifilamentary MgB2 SMES Coil

et al. 2023

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“…In the operation of SFCLs, many other requirements also need to be satisfied, such as excellent current limiting property, fast recovery and low AC loss. Low AC loss is not only important in the sense of decreasing operation and maintenance costs, but also advantageous to the thermal stability of superconductors [22]. Thus far, various calculation works have been done for the AC loss calculation of straight type and bifilar pancake type SFCL [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

AC loss modelling and experiment of two types of low-inductance solenoidal coils

Liang

Yuan

Zhang

et al. 2016

Supercond. Sci. Technol.

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Low-inductance solenoidal coils, which usually refer to the nonintersecting type and the braid type, have already been employed to build superconducting fault current limiters because of their fast recovery and low inductance characteristics. However, despite their usage there is still no systematical simulation work concerning the AC loss characteristics of the coils built with 2G high temperature superconducting tapes perhaps because of their complicated structure. In this paper, a new method is proposed to simulate both types of coils with 2D axisymmetric models solved by H formulation. Following the simulation work, AC losses of both types of low inductance solenoidal coils are compared numerically and experimentally, which verify that the model works well in simulating non-inductive coils. Finally, simulation works show that pitch has significant impact to AC loss of both types of coils and the inter-layer separation has different impact to the AC loss of braid type of coil in case of different applied currents. The model provides an effective tool for the design optimisation of SFCLs built with non-inductive solenoidal coils.

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Superconducting Magnetic Energy Storage ( SMES ) Systems

Yuan

Zhang

2015

Handbook of Clean Energy Systems

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Superconducting magnetic energy storage ( SMES ) systems can store energy in a magnetic field created by a continuous current flowing through a superconducting magnet. Compared to other energy storage systems, SMES systems have a larger power density, fast response time, and long life cycle. Different types of low temperature superconductors ( LTS ) and high temperature superconductors ( HTS ) are compared. A general magnet design methodology, which aims to find the maximum operating current that can be taken by a magnet, is presented. However, for magnets using coated conductors, a more complicated model has to be used because of the shielding currents created by the magnetic field. The Virial theorem is discussed, which limits the maximum energy density in a SMES magnet. The topologies of persistent switch and AC / DC converters have been discussed and compared. In Section 4, an overview of the development history of SMES technologies are discussed. This covers early development of large‐scale SMES for bulk energy storage and recent development of small‐scale SMES for fast‐response applications. Finally, the applications of SMES systems are discussed, which include load leveling, frequency support, and voltage regulations.

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AC Loss and Thermal Stability of HTS Model Coils for a 600 kJ SMES

Cited by 20 publications

References 5 publications

Calculation of AC Losses in a 500 kJ/200 kW Multifilamentary MgB2 SMES Coil

Calculation of AC Losses in a 500 kJ/200 kW Multifilamentary MgB2 SMES Coil

AC loss modelling and experiment of two types of low-inductance solenoidal coils

Superconducting Magnetic Energy Storage ( SMES ) Systems

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