The Experts below are selected from a list of 7935 Experts worldwide ranked by ideXlab platform
Wenyong Guo - One of the best experts on this subject based on the ideXlab platform.
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optimal power smoothing control for Superconducting fault current limiter magnetic energy storage system
Cryogenics, 2021Co-Authors: Wenyong GuoAbstract:Abstract Optimal energy management is a major challenge for most energy storage systems (ESSs), which is especially a big concern for the Superconducting fault current limiter-magnetic ESS (SFCL-MES). To prevent malfunction, the Superconducting Coil (SC) current of the SFCL-MES needs to be controlled strictly within a well-defined operational range. To optimally utilize the energy capability of the ESS while keeping the state of charge (SOC) within a safe range, a novel multi-input multi-output fuzzy logic controller (FLC), which adjusts both the filter time constant and the SOC regulator gains, is proposed for optimal energy utilization. The parameters of the FLC were further optimized offline by particle swarm optimization with real collected operational data. The optimized FLC has been successfully implemented on a 1MVA/1MJ prototype installed in a wind farm. The operational results of the prototype demonstrate the good performance of the proposed approaches.
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development of a 1 mva 1 mj Superconducting fault current limiter magnetic energy storage system for lvrt capability enhancement and wind power smoothing
IEEE Transactions on Applied Superconductivity, 2018Co-Authors: Wenyong Guo, Jingye Zhang, Naihao Song, Zhiyuan Gao, Zhiqin Zhu, Guomin Zhang, Liwei Jing, Yuping Teng, Liye XiaoAbstract:A 1-MVA/1-MJ Superconducting fault current limiter-magnetic energy storage system (SFCL-MES) has been developed. The SFCL-MES utilizes one Superconducting Coil to both enhance the low-voltage ride-through capability of wind turbine and smooth wind power output. The developed SFCL-MES was installed and put into operation in a wind farm northwest of China. This paper presents final design and test of the four major components of SFCL-MES: power conditioning system, cryogenic system, Superconducting Coil, and monitoring system. Test results of the SFCL-MES are also presented. Test results show that the SFCL-MES has good performance and is able to improve the power quality and reliability of wind power generation.
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overview and development progress of a 1 mva 1 mj Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Applied Superconductivity, 2016Co-Authors: Wenyong Guo, Jingye Zhang, Naihao Song, Zhiyuan Gao, Zhiqin Zhu, Yuping Wang, Shaotao Dai, Liye XiaoAbstract:A 1-MVA/1-MJ Superconducting fault current limiter-magnetic energy storage system (SFCL-MES) is under development. The SFCL-MES is used to enhance the low voltage ride through capability and smooth the output power of the wind farm. The SFCL-MES is composed of four major components: a power controller, a Superconducting Coil, a cryogenic refrigeration system, and a monitoring system. This paper gives an overview of the SFCL-MES and briefly introduces the design and development progress of the four major components. Simulation results with the design parameters are also presented to evaluate the performance of the SFCL-MES.
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enhancing low voltage ride through capability and smoothing output power of dfig with a Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Energy Conversion, 2012Co-Authors: Wenyong Guo, Liye Xiao, Shaotao DaiAbstract:Two major problems that are faced by doubly fed induction generators are: weak low-voltage ride-through capability and fluctuating output power. To solve these problems, a Superconducting fault-current limiter-magnetic energy storage system is presented. The Superconducting Coil (SC) is utilized as the energy storage device for output power smoothing control during normal operation and as a fault-current limiting inductor to limit the surge current in the stator or rotor during the grid fault. The SC can also weaken the rotor back electromotive force voltage, and thus enhance the controllability of the rotor-side converter (RSC), which helps to protect both the RSC and the gearbox. Simulation results verify the efficacy of the proposed approaches.
Damian P. Hampshire - One of the best experts on this subject based on the ideXlab platform.
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dc characterization and 3d modelling of a triangular epoxy impregnated high temperature Superconducting Coil
Superconductor Science and Technology, 2015Co-Authors: Di Hu, Mark D Ainslie, J P Rush, Michael John Raine, John H. Durrell, Damian P. HampshireAbstract:The direct current (dc) characterization of high temperature Superconducting (HTS) Coils is important for applications, such as electric machines, Superconducting magnetic energy storage and transformers. In this paper, the dc characterization of a triangular-shaped, epoxyimpregnated HTS Coil wound with YBCO coated conductor intended for use in an axial-flux HTS motor is presented. Voltage was measured at several points along the Coil to provide detailed information of its dc characteristics. The Coil is modelled based on the H-formulation using a new three-dimensional (3D) technique that utilizes the real Superconducting layer thickness, and this model allows simulation of the actual geometrical layout of the HTS Coil structure. Detailed information on the critical current density’s dependence on the magnitude and orientation of the magnetic flux density, Jc(B,θ), determined from experimental measurement of a short sample of the coated conductor comprising the Coil is included directly in the numerical model by a two-variable direct interpolation to avoid developing complicated equations for data fitting and greatly improve the computational speed. Issues related to meshing the finite elements of the real thickness 3D model are also discussed in detail. Based on a comparison of the measurement and simulation results, it is found that non-uniformity along the length exists in the Coil, which implies imperfect Superconducting properties in the coated conductor, and hence, Coil. By evaluating the current–voltage (I–V) curves using the experimental data, and after taking into account a more practical n value and critical current for the non-uniform region, the modelling results show good agreement with the experimental results, validating this model as an appropriate tool to estimate the dc I–V relationship of a Superconducting Coil. This work provides a further step towards effective and efficient 3D modelling of Superconducting devices for large-scale applications.
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DC characterization and 3D modelling of a triangular, epoxy-impregnated high temperature Superconducting Coil.
Superconductor Science and Technology, 2015Co-Authors: Hu D, J P Rush, Ainslie Mark, Durrell John, Zou J, Mj Raine, Damian P. HampshireAbstract:The direct current (dc) characterization of high temperature Superconducting (HTS) Coils is important for applications, such as electric machines, Superconducting magnetic energy storage and transformers. In this paper, the dc characterization of a triangular-shaped, epoxy-impregnated HTS Coil wound with YBCO coated conductor intended for use in an axial-flux HTS motor is presented. Voltage was measured at several points along the Coil to provide detailed information of its dc characteristics. The Coil is modelled based on the H -formulation using a new three-dimensional (3D) technique that utilizes the real Superconducting layer thickness, and this model allows simulation of the actual geometrical layout of the HTS Coil structure. Detailed information on the critical current density's dependence on the magnitude and orientation of the magnetic flux density, Jc(B,θ), determined from experimental measurement of a short sample of the coated conductor comprising the Coil is included directly in the numerical model by a two-variable direct interpolation to avoid developing complicated equations for data fitting and greatly improve the computational speed. Issues related to meshing the finite elements of the real thickness 3D model are also discussed in detail. Based on a comparison of the measurement and simulation results, it is found that non-uniformity along the length exists in the Coil, which implies imperfect Superconducting properties in the coated conductor, and hence, Coil. By evaluating the current–voltage (I–V) curves using the experimental data, and after taking into account a more practical n value and critical current for the non-uniform region, the modelling results show good agreement with the experimental results, validating this model as an appropriate tool to estimate the dc I–V relationship of a Superconducting Coil. This work provides a further step towards effective and efficient 3D modelling of Superconducting devices for large-scale applications.Di Hu and Jin Zou would like to acknowledge the support of Churchill College, Cambridge, the China Scholarship Council and the Cambridge Commonwealth, European and International Trust. Dr Mark Ainslie would like to acknowledge the support of a Royal Academy of Engineering Research Fellowship.This is the author accepted manuscript. The final version is available from IOP via http://dx.doi.org/10.1088/0953-2048/28/6/06501
Shaotao Dai - One of the best experts on this subject based on the ideXlab platform.
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overview and development progress of a 1 mva 1 mj Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Applied Superconductivity, 2016Co-Authors: Wenyong Guo, Jingye Zhang, Naihao Song, Zhiyuan Gao, Zhiqin Zhu, Yuping Wang, Shaotao Dai, Liye XiaoAbstract:A 1-MVA/1-MJ Superconducting fault current limiter-magnetic energy storage system (SFCL-MES) is under development. The SFCL-MES is used to enhance the low voltage ride through capability and smooth the output power of the wind farm. The SFCL-MES is composed of four major components: a power controller, a Superconducting Coil, a cryogenic refrigeration system, and a monitoring system. This paper gives an overview of the SFCL-MES and briefly introduces the design and development progress of the four major components. Simulation results with the design parameters are also presented to evaluate the performance of the SFCL-MES.
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enhancing low voltage ride through capability and smoothing output power of dfig with a Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Energy Conversion, 2012Co-Authors: Wenyong Guo, Liye Xiao, Shaotao DaiAbstract:Two major problems that are faced by doubly fed induction generators are: weak low-voltage ride-through capability and fluctuating output power. To solve these problems, a Superconducting fault-current limiter-magnetic energy storage system is presented. The Superconducting Coil (SC) is utilized as the energy storage device for output power smoothing control during normal operation and as a fault-current limiting inductor to limit the surge current in the stator or rotor during the grid fault. The SC can also weaken the rotor back electromotive force voltage, and thus enhance the controllability of the rotor-side converter (RSC), which helps to protect both the RSC and the gearbox. Simulation results verify the efficacy of the proposed approaches.
Liye Xiao - One of the best experts on this subject based on the ideXlab platform.
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development of a 1 mva 1 mj Superconducting fault current limiter magnetic energy storage system for lvrt capability enhancement and wind power smoothing
IEEE Transactions on Applied Superconductivity, 2018Co-Authors: Wenyong Guo, Jingye Zhang, Naihao Song, Zhiyuan Gao, Zhiqin Zhu, Guomin Zhang, Liwei Jing, Yuping Teng, Liye XiaoAbstract:A 1-MVA/1-MJ Superconducting fault current limiter-magnetic energy storage system (SFCL-MES) has been developed. The SFCL-MES utilizes one Superconducting Coil to both enhance the low-voltage ride-through capability of wind turbine and smooth wind power output. The developed SFCL-MES was installed and put into operation in a wind farm northwest of China. This paper presents final design and test of the four major components of SFCL-MES: power conditioning system, cryogenic system, Superconducting Coil, and monitoring system. Test results of the SFCL-MES are also presented. Test results show that the SFCL-MES has good performance and is able to improve the power quality and reliability of wind power generation.
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overview and development progress of a 1 mva 1 mj Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Applied Superconductivity, 2016Co-Authors: Wenyong Guo, Jingye Zhang, Naihao Song, Zhiyuan Gao, Zhiqin Zhu, Yuping Wang, Shaotao Dai, Liye XiaoAbstract:A 1-MVA/1-MJ Superconducting fault current limiter-magnetic energy storage system (SFCL-MES) is under development. The SFCL-MES is used to enhance the low voltage ride through capability and smooth the output power of the wind farm. The SFCL-MES is composed of four major components: a power controller, a Superconducting Coil, a cryogenic refrigeration system, and a monitoring system. This paper gives an overview of the SFCL-MES and briefly introduces the design and development progress of the four major components. Simulation results with the design parameters are also presented to evaluate the performance of the SFCL-MES.
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enhancing low voltage ride through capability and smoothing output power of dfig with a Superconducting fault current limiter magnetic energy storage system
IEEE Transactions on Energy Conversion, 2012Co-Authors: Wenyong Guo, Liye Xiao, Shaotao DaiAbstract:Two major problems that are faced by doubly fed induction generators are: weak low-voltage ride-through capability and fluctuating output power. To solve these problems, a Superconducting fault-current limiter-magnetic energy storage system is presented. The Superconducting Coil (SC) is utilized as the energy storage device for output power smoothing control during normal operation and as a fault-current limiting inductor to limit the surge current in the stator or rotor during the grid fault. The SC can also weaken the rotor back electromotive force voltage, and thus enhance the controllability of the rotor-side converter (RSC), which helps to protect both the RSC and the gearbox. Simulation results verify the efficacy of the proposed approaches.
J P Rush - One of the best experts on this subject based on the ideXlab platform.
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transport ac loss measurements of a triangular epoxy impregnated high temperature Superconducting Coil
IEEE Transactions on Applied Superconductivity, 2017Co-Authors: Di Hu, Mark D Ainslie, J P Rush, J Kvitkovic, Sastry Pamidi, Difan Zhou, John H. DurrellAbstract:© 2002-2011 IEEE. In this paper, the transport ac losses in a triangular epoxy-impregnated high-temperature Superconducting (HTS) Coil made from YBCO coated conductor, intended for use in a prototype axial flux HTS electric machine, are measured using two different electrical techniques at 77 K. The first set of ac loss measurements of the Coil are carried out at the University of Cambridge using a technique based on a lock-in amplifier. The Coil is then measured at the Center for Advanced Power Systems, Florida State University, using a technique based on a high-accuracy data acquisition measurement system. The two different methods show consistent results, validating the accuracy of these two techniques for transport ac loss measurements of Superconducting Coils. Multiple voltage taps are utilized within the Coil to study the details and distribution of the ac loss in different sections of the Coil. Losses are also measured with a flux diverter made of ferromagnetic material to analyze its effect on the ac losses.
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dc characterization and 3d modelling of a triangular epoxy impregnated high temperature Superconducting Coil
Superconductor Science and Technology, 2015Co-Authors: Di Hu, Mark D Ainslie, J P Rush, Michael John Raine, John H. Durrell, Damian P. HampshireAbstract:The direct current (dc) characterization of high temperature Superconducting (HTS) Coils is important for applications, such as electric machines, Superconducting magnetic energy storage and transformers. In this paper, the dc characterization of a triangular-shaped, epoxyimpregnated HTS Coil wound with YBCO coated conductor intended for use in an axial-flux HTS motor is presented. Voltage was measured at several points along the Coil to provide detailed information of its dc characteristics. The Coil is modelled based on the H-formulation using a new three-dimensional (3D) technique that utilizes the real Superconducting layer thickness, and this model allows simulation of the actual geometrical layout of the HTS Coil structure. Detailed information on the critical current density’s dependence on the magnitude and orientation of the magnetic flux density, Jc(B,θ), determined from experimental measurement of a short sample of the coated conductor comprising the Coil is included directly in the numerical model by a two-variable direct interpolation to avoid developing complicated equations for data fitting and greatly improve the computational speed. Issues related to meshing the finite elements of the real thickness 3D model are also discussed in detail. Based on a comparison of the measurement and simulation results, it is found that non-uniformity along the length exists in the Coil, which implies imperfect Superconducting properties in the coated conductor, and hence, Coil. By evaluating the current–voltage (I–V) curves using the experimental data, and after taking into account a more practical n value and critical current for the non-uniform region, the modelling results show good agreement with the experimental results, validating this model as an appropriate tool to estimate the dc I–V relationship of a Superconducting Coil. This work provides a further step towards effective and efficient 3D modelling of Superconducting devices for large-scale applications.
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DC characterization and 3D modelling of a triangular, epoxy-impregnated high temperature Superconducting Coil.
Superconductor Science and Technology, 2015Co-Authors: Hu D, J P Rush, Ainslie Mark, Durrell John, Zou J, Mj Raine, Damian P. HampshireAbstract:The direct current (dc) characterization of high temperature Superconducting (HTS) Coils is important for applications, such as electric machines, Superconducting magnetic energy storage and transformers. In this paper, the dc characterization of a triangular-shaped, epoxy-impregnated HTS Coil wound with YBCO coated conductor intended for use in an axial-flux HTS motor is presented. Voltage was measured at several points along the Coil to provide detailed information of its dc characteristics. The Coil is modelled based on the H -formulation using a new three-dimensional (3D) technique that utilizes the real Superconducting layer thickness, and this model allows simulation of the actual geometrical layout of the HTS Coil structure. Detailed information on the critical current density's dependence on the magnitude and orientation of the magnetic flux density, Jc(B,θ), determined from experimental measurement of a short sample of the coated conductor comprising the Coil is included directly in the numerical model by a two-variable direct interpolation to avoid developing complicated equations for data fitting and greatly improve the computational speed. Issues related to meshing the finite elements of the real thickness 3D model are also discussed in detail. Based on a comparison of the measurement and simulation results, it is found that non-uniformity along the length exists in the Coil, which implies imperfect Superconducting properties in the coated conductor, and hence, Coil. By evaluating the current–voltage (I–V) curves using the experimental data, and after taking into account a more practical n value and critical current for the non-uniform region, the modelling results show good agreement with the experimental results, validating this model as an appropriate tool to estimate the dc I–V relationship of a Superconducting Coil. This work provides a further step towards effective and efficient 3D modelling of Superconducting devices for large-scale applications.Di Hu and Jin Zou would like to acknowledge the support of Churchill College, Cambridge, the China Scholarship Council and the Cambridge Commonwealth, European and International Trust. Dr Mark Ainslie would like to acknowledge the support of a Royal Academy of Engineering Research Fellowship.This is the author accepted manuscript. The final version is available from IOP via http://dx.doi.org/10.1088/0953-2048/28/6/06501
