Design and Comparison of a 1 MW / 5s HTS SMES with Toroidal and Solenoidal Geometry

TL;DR

This paper designs and compares 1 MW/5s HTS SMES coils with toroidal and solenoidal geometries, analyzing their design parameters, conductor requirements, and AC losses to inform practical energy storage solutions.

Contribution

It provides a detailed design comparison of toroidal and solenoidal HTS SMES coils based on a 2G HTS conductor, including practical considerations and AC loss analysis.

Findings

Toroidal and solenoidal coils differ in conductor requirements.

AC losses vary between the two geometries during charge-discharge cycles.

Design criteria influence the coil geometry and performance.

Abstract

The design of a HTS SMES coil with solenoidal and toroidal geometry is carried out based on a commercially available 2G HTS conductor. A SMES system of practical interest (1 MW / 5 s) is considered. The comparison between ideal toroidal and solenoidal geometry is first discussed and the criteria used for choosing the geometrical parameters of the coils' bore are explained. The design of the real coil is then carried out and the final amount of conductor needed is compared. A preliminary comparison of the two coils in terms of AC loss during one charge discharge cycle is also discussed.