Abstract Body

In the design of flexible DC busbar connection for the high current transmission busbar power supply in fusion devices. CRAFT(Comprehensive Research Facility for Fusion Technology) superconducting converter with a cross-section of 200 × The 60mm water-cooled aluminum busbar is used for current transmission, and its segments will be connected through flexible connectors. Design connections to compensate for thermal expansion of the busbar and offset during installation. Due to the very small contact surface between the DC busbar and the flexible connection, the current flowing through it can reach up to 30kA. If the contact resistance is assumed to be 1 u Ω, the power consumed on the contact surface is approximately 900W. In the case of contact overheating, it is necessary to study the design of the busbar connection to reduce contact resistance and reduce the temperature rise of the contact joint. This paper first introduces the different designs of the high current bolted busbar, and then introduces the calculation method of the busbar contact resistance. Finally, the temperature rise experiment was carried out on the CRAFT busbar plantform, and the simulation results were compared to determine the optimal solution.

References

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Acknowledgment

This work was supported by Project funded by China Postdoctoral Science Foundation (No. 2022M713187), Natural Science Foundation of Anhui Province (228085ME142) and Comprehensive Research Facility for Fusion Technology Program of China under Contract No. 2018-000052-73-01-001228.