Design aspects of mid-size SMES using high temperature superconductors

Schoenung, Susan M.; Meier, W.R.; Hull, J.R.; Fagaly, R.L.; Heiberger, M.; Stephens, R. B.; Leuer, J.A.; Guzmán, Roger

doi:10.1109/77.233714

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…With higher critical current and temperature, HTS power equipment is more hopefully applied in power system [1][2][3][4]. For DC current and steady magnetic field, superconductors load for cryogenic systems [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A novel AC loss measurement method for HTS coils based on parameter identification

Li¹,

Li²,

Guo³

et al. 2022

Supercond. Sci. Technol.

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In the presence of AC current or AC magnetic field, superconductors will suffer AC loss. The measurement of AC loss is of great significance for applied superconductivity field. There are main three different methods for AC loss measurement. Among them, electrical measurement method is widely researched by different laboratories. The existed electrical measurement method mainly has two shortcomings: difficult to be used in HTS coils with high inductance and only available for periodic current conditions (only obtains average value of AC loss for one or several current periods and cannot obtain AC loss at any instant). In this paper, a novel AC loss measurement method based on parameter identification is proposed to solve the second shortcoming (only available for periodic current conditions). This novel method measures AC loss through identifying HTS coils’ resistance and inductance at any moment, which is completely different from previous measurement methods. The theoretical basis of this novel method mainly contains three parts: equivalent circuit of HTS coils, instantaneous power identification from Poynting theorem and parameter identification based on recursive least squares with fixed forgetting factor (FFRLS). Compared with AC loss measurement results of previous electrical method (integral method), the validity of this novel measurement method is demonstrated. In theory, this novel method can measure AC loss for any current waveform (periodic and aperiodic current), which greatly widens measurement range of previous electrical method. The principle of this novel method and detailed experimental results are discussed and analyzed in this paper.

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Section: Introductionmentioning

confidence: 99%

A novel AC loss measurement method for HTS coils based on parameter identification

Li¹,

Li²,

Guo³

et al. 2022

Supercond. Sci. Technol.

View full text Add to dashboard Cite

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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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Development of SMES Systems

Yuan

2011

Second-Generation High-Temperature Superconducting Coils and Their Applications for Energy Storage

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Design aspects of mid-size SMES using high temperature superconductors

Cited by 4 publications

References 8 publications

A novel AC loss measurement method for HTS coils based on parameter identification

A novel AC loss measurement method for HTS coils based on parameter identification

Superconducting Magnetic Energy Storage ( SMES ) Systems

Development of SMES Systems

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