Demonstration Project of 35 kV/1 kA Cold Dielectric High Temperature Superconducting Cable System in Tianjin

Li, Jichun; Zhang, Liyong; Ye, Xinyu; Xia, Fangmin; Cao, Yujun

doi:10.1109/tasc.2019.2963408

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…Despite its drawbacks, in recent years, many field tests of the superconducting apparatus have been conducted, as recently shown in [2,5,8]. The results of the tests prove that the superconducting technology is useful, reliable, and not so difficult to handle in comparison with the conventional one.…”

Section: Introductionmentioning

confidence: 98%

“…Being a technology with higher values of specific power and energy density than the conventional technology, it can facilitate the smallness of power equipment decisive in highly populated areas. Accompanied with this is the reduction in power loss in the main electric power equipment, offering higher efficiencies than conventional facilities [7,8]. Furthermore, superconducting technology is also revolutionising the future of electromobility as a key enabler for future electric aircraft due to their potential ability to allow higher specific power electrical machines.…”

Section: Introductionmentioning

confidence: 99%

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Superconducting Electric Power Systems: R&D Advancements

2022

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Superconducting Electric Power Systems: R&D Advancements

2022

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“…Liquid nitrogen, as a chemically stable refrigerant, can be converted into supercooled liquid nitrogen at temperatures below the saturation temperature at saturation pressure. Liquid nitrogen circulation units, which are based on using supercooled liquid nitrogen as the circulating fluid, have been widely used in monochromators, low-temperature oscillators, superconducting cables, high-temperature superconducting motors, and composite material research due to their excellent cooling effect, controllable flow, and stable pressure [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

A Liquid Nitrogen Cooling Circulation Unit: Its Design and a Performance Study

Yao,

Lu,

Xie

et al. 2024

Machines

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A liquid nitrogen cooling circulating unit is a necessary condition for the stable operation of a cryogenic oscillator, which can provide a stable working environment for the oscillator. In this paper, according to the user’s functional requirements and performance parameters, a closed cooling system with supercooled liquid nitrogen as the medium was designed using SOLIDWORKS 2021 software, which can provide a suitable working environment for the cryogenic oscillator. Combined with the system heat load analysis, theoretical calculation for and the design of the coil heat exchanger, one of the core pieces of equipment of the unit, were carried out. The performance of the designed nitrogen exhaust heater was studied using FLUENT 2021 software, and the velocity field and temperature field of the nitrogen exhaust heater were analyzed. The results show that the outlet temperature of the nitrogen exhaust heating device can reach up to 310 K, and the outlet flow rate of the heating device is 0.01528 kg/s. The experiments on the liquid nitrogen circulating unit using the simulated load equipment show that the refrigeration power of the unit can reach a design index of 600 W, and the temperature of the liquid nitrogen at the liquid outlet of the unit can reach 77.8 K. The experiments also show that the unit meets the design requirements.

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“…In the German city of Essen, within the Ampacity project a 1 km long medium-voltage (10 kV) AC HTS line has been installed and successfully operated since 2014 as a connection of two electric substations, replacing a conventional high voltage system [13][14][15]. In China, a 100 m long 35 kV DC line was successfully tested in Tianjin [16], while a 1.2 km long 35 kV AC SCTL is expected to enter into operation during 2021 [17]. In the United States, the 600 m long high-voltage AC SCTL is in operation since 2008 within the Long Island Power Authority Project, originally aimed at demonstrating the commercial readiness of the system [18,19].…”

Section: Introductionmentioning

confidence: 99%

Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

Savoldi¹,

Placido²,

Viarengo³

2022

Supercond. Sci. Technol.

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An overview of the main peculiarities of the models currently available in literature for the thermal-hydraulic analysis of the cooling of the HTS power transmission cables, mainly in nominal operating conditions, is performed. Several models address specific issues such as the temperature distribution along or across the cables, and their pressure drop, typically with a simplified approach. The verification and validation of the models has not been systematically addressed so far. From the analysis of the available literature, the lack of a general model, capable to address thermal-hydraulic transients for the cooling of the different possible cable designs, with capability to catch both the behaviour of the cable solid components and different cryogens, is highlighted. The main ingredients that such general thermal-hydraulic model should not miss are presented, also based on the know-how on, and comparison to, similar tools for LTS cables for nuclear fusion applications.

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Demonstration Project of 35 kV/1 kA Cold Dielectric High Temperature Superconducting Cable System in Tianjin

Cited by 8 publications

References 4 publications

Superconducting Electric Power Systems: R&D Advancements

Superconducting Electric Power Systems: R&D Advancements

A Liquid Nitrogen Cooling Circulation Unit: Its Design and a Performance Study

Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

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