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3D electromagnetic modelling for high-temperature superconducting dynamo flux pumps using T-A formulation

High Voltage 2024年第2期9卷 367-379页

作者： Luning Hao Fangliang Dong Jintao Hu Qi Wang Haigening Wei Ismail Patel Adil Shah Yuyang Wu tim coombs Department of Engineering University of CambridgeCambridgeUK Plasma Science and Fusion Center Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

A high-temperature superconducting(HTS)dynamo flux pump can inject DC currents into closed-loop HTS magnets without *** enables the realisation of current-lead-free or even through-wall charging systems for high-field applications such as nuclear magnetic resonance/magnetic resonance imaging(MRI)magnets,fusion reactors and *** have proposed many simulation models to understand the working principle of HTS dynamos,few of which are in 3D because of converging ***,the influences of many key 3D parameters in the HTS dynamo are scarcely *** authors propose an efficient 3D modelling method of the HTS dynamo based on the T-A *** rotating magnets are modelled by a ring-shaped permanent magnet with space-time-variant remanent flux density to avoid moving ***,together with the T-A formulation,makes the 3D model efficient and *** accuracy of the model is verified by the experimental instantaneous and time-integrated dynamic *** this model,the authors present systematic case studies to thoroughly explore the influences of the key parameters of a dynamo flux pump on the dynamic voltage and *** proposed modelling method and results could significantly benefit the design and optimisation of HTS dynamos for high-field magnets.

关键词： formulation magnets pump

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Studies on the active SISFCL and its impact on the distance protection of the EHV transmission line

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Protection and Control of Modern Power Systems 2016年第1期1卷 164-169页

作者： Chao Li Bin Li Fengrui Guo Jianzhao Geng Xiuchang Zhang tim coombs EPEC Superconductivity Group University of CambridgeCambridge CB30FAUK Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Grid Tianjin Electric Power Company Tianjin 300010China.

The active saturated iron-core superconductive fault current limiter(SISFCL)is a good choice to decrease fault *** paper introduced the principles and impedance characteristic of the active ***,it shows the current-limiting effects of the ***,the impact of the active SISFCL on the distance protection of the EHV transmission line is *** on that,the coordination scheme of the distance protections is proposed.A 500 kV double-circuit transmission system with SISFCLs is simulated by Electro-Magnetic Transients Program including DC(EMTDC).Simulation tests demonstrate the correctness and validity of theoretical analyses.

关键词： Superconductive Fault current limiter(SFCL) Saturated iron core Distance protection Current-limiting effects

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