Abstract
The 35-kV km-level domestic high-temperature superconducting (HTS) power cable project in Shanghai, China, is expected to be deployed in 2021. Facing the complex operating environment in the metropolitan area, such as the vibration excitation from the subway, pile driving, and seismic activities, the vacuum degree, sealability, and insulation performance of the HTS cables may be affected by the unavoidable mechanical perturbations. The response to the potential vibration excitation is a key factor for the safety and stability of the HTS cables in operation. Therefore, this paper conducts a set of vibration testings for the HTS cable under four kinds of vibration conditions, which include the subway vibration, pile-driving vibration, typical earthquake vibration, and Shanghai artificial wave vibration. Results show that the leakage and outgassing rate of the HTS cable is 1.3×10−6 Pa m3/s at a static state, and increases to 1.4×10−6 Pa m3/s after the vibration testing. The HTS cable exhibits insignificant changes after the vibration testings in the dielectric spectrum examination. The HTS cable can keep its function after the vibration testing that possibly occurred in the metropolitan area.
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The project was funded by the State Grid Corporation of China Science and Technology Project with grant no. 520940180014.
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Wei, B., Jiao, T., Wang, W. et al. Vibration Testing and Evaluation of 35-kV km-Level Domestic Second-Generation High-Temperature Superconducting Power Cable in Shanghai, China. J Supercond Nov Magn 34, 1321–1327 (2021). https://doi.org/10.1007/s10948-021-05858-2
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DOI: https://doi.org/10.1007/s10948-021-05858-2