Novel gases as electrical insulation and a new design for gas-cooled superconducting power cables

Stamm, T.; Cheetham, Peter; Park, C.; Kim, C. H.; Graber, Lukas; Pamidi, Sastry

doi:10.1109/mei.2020.9165697

Cited by 11 publications

(5 citation statements)

References 20 publications

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“…Variable DC transmission is similar to conventional DC transmission, and the inverter station is locked into the DC voltage control for the first time. It generates DC voltage that can lock other stations, control transmission and blackouts [16,20]. e outage strategy of the three-terminal flexible DC transmission system is similar to that of the twoterminal system.…”

Section: Methodsmentioning

confidence: 99%

Application Analysis of MMC-HVDC AC Tie Line Transmission in New Energy Power Generation

Sun

Dang

Jia-yi

2022

Journal of Control Science and Engineering

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In order to solve the problem of new energy power generation, the author proposes an application analysis method based on MMC-HVDC AC tie line transmission in new energy power generation. This method analyzes the research status of the operation, protection, and control of HVDC flexible transmission systems in various countries and summarizes the advantages of flexible HVDC transmission systems compared with traditional DC, the research focus of the system protection control is explored from the research methods and research ideas. Experimental results show that: the dynamic response of the average value of the capacitor voltage when the two control systems are subjected to external disturbances, the disturbance is set as the DC side voltage rise, and the amplitude is 5%. Conclusion. MMC-HVDC is beneficial to improve the stability and reliability of system operation.

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Section: Methodsmentioning

confidence: 99%

Application Analysis of MMC-HVDC AC Tie Line Transmission in New Energy Power Generation

Sun

Dang

Jia-yi

2022

Journal of Control Science and Engineering

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“…Furthermore, the use of GHe is typically envisaged in the SC cables in shipboard applications, where it is adopted and recommended avoiding the risk of asphyxiation in the event of a breach due to the confined space of such applications. Unfortunately, one of the drawbacks of using GHe as a coolant is its low dielectric strength, which can limit GHe-cooled SCTCs to low-medium voltage applications [30]. A hybrid configuration has been recently proposed within the European Project Best Paths [29], where the GHe acts only as the coolant, while the LN 2 is used as a part of the dielectric system.…”

Section: Cooling Optionsmentioning

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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“…Submarine cables have become essential for the reliable delivery of electrical power nowadays, due to their advantages, such as low environmental impact and low fault rate [1,2]. Oil-filled submarine cable is one of important submarine cables used for high-voltage alternating current (HVAC) power transmission, and dodecylbenzene (DDB) is nearly irreplaceable insulating oil to them [3,4].…”

Section: Introductionmentioning

confidence: 99%

Laboratory investigation of dodecylbenzene diffusion from submarine cables

Liu,

Liao,

Yang

et al. 2024

E3S Web Conf.

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Oil-filled submarine cables have come to dominate the reliable delivery of electrical power today, but oil leakage still remain a challenge. This work focuses on the exploring of spill behavior of dodecylbenzene (DDB) after leakage and the detection of DDB. Static and dynamic spill model were established to study the spreading and migration behavior of underwater DDB. In still water, the spilled oil droplets can quickly reach the uniform floating speed of 0.13 m s-1 with no significant change under different oil spill rates. DDB can be dispersed as small droplets in seawater, which the diameter of DDB droplets increased from 60 nm to 200 nm with the increase of the concentration from 10 ppm to 1000 ppm. This study suggests a research basis for finding the leakage point of submarine cables, and explores the way for detection of DDB.

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Novel gases as electrical insulation and a new design for gas-cooled superconducting power cables

Cited by 11 publications

References 20 publications

Application Analysis of MMC-HVDC AC Tie Line Transmission in New Energy Power Generation

Application Analysis of MMC-HVDC AC Tie Line Transmission in New Energy Power Generation

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

Laboratory investigation of dodecylbenzene diffusion from submarine cables

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