In this paper, the design optimization of the structural parameters of multilayer conductors in high temperature superconducting （HTS） cable is reviewed. Various optimization methods, such as the particle swarm opti...In this paper, the design optimization of the structural parameters of multilayer conductors in high temperature superconducting （HTS） cable is reviewed. Various optimization methods, such as the particle swarm optimization （PSO）, the genetic algorithm （GA）, and a robust optimization method based on design for six sigma （DFSS）, have been applied to realize uniform current distribution among the multilayer HTS conductors. The continuous and discrete variables, such as the winding angle, radius, and winding direction of each layer, are chosen as the design parameters. Under the constraints of the mechanical properties and critical current, PSO is proven to be a more powerful tool than GA for structural parameter optimization, and DFSS can not only achieve a uniform current distribution, but also improve significantly the reliability and robustness of the HTS cable quality.展开更多
With the support of the National Center for R&D on Superconductivity, a 6m high T_c superconducting (HTS) power cable has cartied a current of 1473 A successfully at the Institute of Electrical Engineering (IEE), ...With the support of the National Center for R&D on Superconductivity, a 6m high T_c superconducting (HTS) power cable has cartied a current of 1473 A successfully at the Institute of Electrical Engineering (IEE), CAS. In 1998, a one-meter-long, 1000A HTS power cable prototype was developed successfully by展开更多
A conceptual superconducting DC cable model is designed and its magnetic fields distribution is analyzed with Ansoft/Maxwell soft. A DC Power transmission system is also studied by using the Matlab/Simulink. With the ...A conceptual superconducting DC cable model is designed and its magnetic fields distribution is analyzed with Ansoft/Maxwell soft. A DC Power transmission system is also studied by using the Matlab/Simulink. With the DC Line and AC Ground Fault, the system losses analysis is introduced.The analysis results mainly include the magnetic fields distribution of the HTS cable model with Ansoft/Maxwell, the system loss, the DC Line and AC Ground Fault with Matlab/Simulation.展开更多
The integration of REBCO superconducting coils into compact tokamak toroidal field magnets represents a transformative advancement in fusion technology.In the fabrication of these magnets,electrical connections betwee...The integration of REBCO superconducting coils into compact tokamak toroidal field magnets represents a transformative advancement in fusion technology.In the fabrication of these magnets,electrical connections between pancake coils are typically established through a transverse bridging joint,the performance of which critically impacts device efficiency.To address the demand for enhanced connectivity,this study presents a novel bridge-type"stacked joint"utilizing a superconducting-copper composite structure,optimized for inter-coil connections of stacked REBCO cables.Leveraging a modular stacking approach and low-temperature soldering,this design achieves a resistance as low as 1 nΩover a 10 cm length alongside a soldering resistivity below 25 nΩcm^(2)in a liquid nitrogen(77 K)self-field environment.The study further investigates the impact of tape length and quantity on joint electrical performance under this configuration.Rigorous testing,including 10 thermal cycles(77 K to room temperature)and pressure loads up to 30 MPa,confirms the joint’s structural reliability and the consistency of the fabrication process,underscoring its potential for fusion applications.展开更多
In December 2021,a 1.2 km high-temperature superconducting(HTS)cable,Xuhui HTS Cable Project,was completed and installed in Xuhui district,Shanghai,China.A cooling system with three refrigerators and two liquid nitrog...In December 2021,a 1.2 km high-temperature superconducting(HTS)cable,Xuhui HTS Cable Project,was completed and installed in Xuhui district,Shanghai,China.A cooling system with three refrigerators and two liquid nitrogen(LN2)pumps was developed for this km-class cable.Now,this cooling system has worked successfully for two years without faults.This is a great progress for km-class HTS power cable technique,which is validating the reliability and commercial value of HTS power transmission.展开更多
Distributed Temperature Sensor(DTS)based on Raman scattering have a promising application in temperature monitoring and quench detection of high‐temperature superconducting(HTS)fiber optic cable.In this paper,a serie...Distributed Temperature Sensor(DTS)based on Raman scattering have a promising application in temperature monitoring and quench detection of high‐temperature superconducting(HTS)fiber optic cable.In this paper,a series of mechanical property tests were carried out on fiber optical cables with different encapsulation materials to select the best material for the engineering environment.This was followed by loss testing of fiber optic cables with different outer diameters under liquid nitrogen(LN_(2))and the optimal outer diameter to meet measurement accuracy and engineering practicability was determined.Finally,the temperature measurement of fiber optic cables laid on HTS fiber optic cables were calibrated using thermocouple as a reference.The results of this research results provide a suitable fiber optic cable for engineering applications.At the same time,it provides a reference for the selection of optical cable structure parameters in HTS optical cable projects.展开更多
文摘In this paper, the design optimization of the structural parameters of multilayer conductors in high temperature superconducting （HTS） cable is reviewed. Various optimization methods, such as the particle swarm optimization （PSO）, the genetic algorithm （GA）, and a robust optimization method based on design for six sigma （DFSS）, have been applied to realize uniform current distribution among the multilayer HTS conductors. The continuous and discrete variables, such as the winding angle, radius, and winding direction of each layer, are chosen as the design parameters. Under the constraints of the mechanical properties and critical current, PSO is proven to be a more powerful tool than GA for structural parameter optimization, and DFSS can not only achieve a uniform current distribution, but also improve significantly the reliability and robustness of the HTS cable quality.
文摘With the support of the National Center for R&D on Superconductivity, a 6m high T_c superconducting (HTS) power cable has cartied a current of 1473 A successfully at the Institute of Electrical Engineering (IEE), CAS. In 1998, a one-meter-long, 1000A HTS power cable prototype was developed successfully by
文摘A conceptual superconducting DC cable model is designed and its magnetic fields distribution is analyzed with Ansoft/Maxwell soft. A DC Power transmission system is also studied by using the Matlab/Simulink. With the DC Line and AC Ground Fault, the system losses analysis is introduced.The analysis results mainly include the magnetic fields distribution of the HTS cable model with Ansoft/Maxwell, the system loss, the DC Line and AC Ground Fault with Matlab/Simulation.
基金National MCF Energy R&D Program under Grant 2022YFE03150103in part by CTRFR project(Compact-Tokamak based repetitive Reconnection-heated Fusion Reactor)from Shaanxi Startorus Fusion Technology Co.,Ltd.
文摘The integration of REBCO superconducting coils into compact tokamak toroidal field magnets represents a transformative advancement in fusion technology.In the fabrication of these magnets,electrical connections between pancake coils are typically established through a transverse bridging joint,the performance of which critically impacts device efficiency.To address the demand for enhanced connectivity,this study presents a novel bridge-type"stacked joint"utilizing a superconducting-copper composite structure,optimized for inter-coil connections of stacked REBCO cables.Leveraging a modular stacking approach and low-temperature soldering,this design achieves a resistance as low as 1 nΩover a 10 cm length alongside a soldering resistivity below 25 nΩcm^(2)in a liquid nitrogen(77 K)self-field environment.The study further investigates the impact of tape length and quantity on joint electrical performance under this configuration.Rigorous testing,including 10 thermal cycles(77 K to room temperature)and pressure loads up to 30 MPa,confirms the joint’s structural reliability and the consistency of the fabrication process,underscoring its potential for fusion applications.
基金Shanghai's 2023“Science and Technology Innovation Action Plan”(Grant No.23511102100).
文摘In December 2021,a 1.2 km high-temperature superconducting(HTS)cable,Xuhui HTS Cable Project,was completed and installed in Xuhui district,Shanghai,China.A cooling system with three refrigerators and two liquid nitrogen(LN2)pumps was developed for this km-class cable.Now,this cooling system has worked successfully for two years without faults.This is a great progress for km-class HTS power cable technique,which is validating the reliability and commercial value of HTS power transmission.
基金supported by the National Key R&D Program of China(Grant No.2018YFA0704300).
文摘Distributed Temperature Sensor(DTS)based on Raman scattering have a promising application in temperature monitoring and quench detection of high‐temperature superconducting(HTS)fiber optic cable.In this paper,a series of mechanical property tests were carried out on fiber optical cables with different encapsulation materials to select the best material for the engineering environment.This was followed by loss testing of fiber optic cables with different outer diameters under liquid nitrogen(LN_(2))and the optimal outer diameter to meet measurement accuracy and engineering practicability was determined.Finally,the temperature measurement of fiber optic cables laid on HTS fiber optic cables were calibrated using thermocouple as a reference.The results of this research results provide a suitable fiber optic cable for engineering applications.At the same time,it provides a reference for the selection of optical cable structure parameters in HTS optical cable projects.
