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Minwon Park - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea
    MDPI AG, 2019
    Co-Authors: Seok-ju Lee, Minwon Park, Hae-jin Sung, Duyean Won, Jaeun Yoo, Hyung Suk Yang
    Abstract:

    Large-capacity superconducting Power Cables are in the spotlight to replace existing underground transmission Power Cables for energy Power transmission. Among them, the three-phase coaxial superconducting Power Cable has the economic advantage of reducing the superconducting shielding layer by enabling magnetic shielding when the three phases are homogeneous without an independent superconducting shielding layer for magnetic shielding. In order to develop the three-phase coaxial superconducting Power Cable, the electrical and structural design should be carried out to construct the superconducting layer. However, the thermal design and analysis for the cooling of the three-phase coaxial superconducting Power Cable must be done first, so that the electrical design can be made using the temperature transferred to the superconducting layer. The three-phase coaxial superconducting Cable requires a cooling system to circulate the cryogenic refrigerant for cooling below a certain temperature, and the structure of the Cable through which the cryogenic refrigerant travels must also be analyzed. In this paper, the authors conducted a longitudinal temperature analysis according to the structure of the refrigerant circulation system of the Cable and proposed a refrigerant circulation system suitable for this development. The temperature profile according to this analysis was then used as a function of temperature for the electrical (superconducting and insulating layers) design of the three-phase coaxial superconducting Power Cable. It is also expected to be used to analyze the cooling structure of the three-phase coaxial superconducting Power Cable installed in the real grid system

  • Loss Characteristic Analysis of HTS DC Power Cable Using LCC Based DC Transmission System
    IEEE Transactions on Applied Superconductivity, 2012
    Co-Authors: Jin Geun Kim, Minwon Park, Sung-kyu Kim, Haigun Lee, Young-gyun Kim, Hak-man Kim, Yong-jin Won, Kyu-won Jeong, Byeongmo Yang
    Abstract:

    The zero resistance of superconducting material is observed only with a DC current, while transmission loss occurs with an AC current. Power converters use electronic devices which generate harmonic currents due to their high switching frequency. The authors expect that harmonic currents also influence the losses in the superconducting DC Power Cables of a DC transmission system. The authors have developed a miniaturized superconducting DC transmission system with 12 thyristors based AC/DC converter and a 2 m length superconducting Cable connected to the DC side between two converters. The capacity of the converter is 20 kW and the critical current of the HTS DC Power Cable is 140 A. In this paper, the HTS DC Power Cable loss characteristics were anal- ysed by the fabricated home-made thyristor converter system.

  • development of a pscad emtdc model component for ac loss characteristic analysis of hts Power Cable
    IEEE Transactions on Applied Superconductivity, 2010
    Co-Authors: Jin Geun Kim, Seokho Kim, A. Rong Kim, Jun Kyoung Lee, Kideok Sim, Jeonwook Cho, Daewon Kim, Minwon Park, Young Jin Won
    Abstract:

    Although Electromagnetic Power transient analysis software (PSCAD/EMTDC) is one of the useful simulation tools, it does not provide a High Temperature Superconducting (HTS) Power Cable component, which has the same impedance characteristic of a real HTS Power Cable. The authors have already proposed a model component of the HTS Power Cable under the fault condition and simulated Power system including the HTS Power Cable component. The authors, in this paper, developed a PSCAD/EMTDC model component of the HTS Power Cable that includes the AC loss characteristic. The AC loss of the superconductor changes due to the magnitude of the transport current. The relational characteristics between the AC transport current and resistance were measured using a model Cable. The obtained characteristics were applied to the model component of PSCAD/EMTDC. The developed model component was used in the EMTDC simulation circuit. The simulation results show the same characteristics as the experiment results. The resistance variation of the HTS Power Cable and AC loss could be simulated using the developed model component and the component will effectively be used for the AC loss related simulations.

  • AC loss analysis of HTS Power Cable with RABiTS coated conductor
    IEEE Transactions on Applied Superconductivity, 2010
    Co-Authors: Seokho Kim, Kideok Sim, Jeonwook Cho, Hyunman Jang, Minwon Park
    Abstract:

    Numerical analysis of AC loss for a HTS Power Cable is investigated using commercial FEM software package. AC loss of the HTS Power Cable, which is made by 2 G conductor, is hard to experimentally measure due to very small signal compared to that made by 1G conductor. The FEM model describes current distribution and AC loss inside the HTS conductor for the AC transport current through nonlinear E-J correlation. For the verification of the AC loss analysis model, the results were compared with the well known analytic solution of a single strip HTS conductor and experiments. Unlike IBAD substrate, magnetization of the RABiTS has influence on the precise estimation of the AC loss and it is also considered in the FEM model. Moreover, several conductors should be stacked to meet the large transport current because of the small critical current at present and the effect of stacking configuration is also investigated. In this paper, AC loss analysis results are presented for various HTS Power Cable configurations such as stacking directions. The results are compared with the experimental results of a model HTS Power Cable and the best configuration to minimize AC loss is suggested.

  • critical current critical temperature and magnetic field based emtdc model component for hts Power Cable
    IEEE Transactions on Applied Superconductivity, 2007
    Co-Authors: Jonghyun Bang, Kideok Sim, Jeonwook Cho, Jaeho Kim, Jaeyoung Yoon, Minwon Park
    Abstract:

    Before applying the high temperature superconducting (HTS) Power Cable to real utility network, system analysis should be performed using simulation tools. For the practical use of HTS devices in electrical Power system, prior simulation analysis is very important. PSCAD/EMTDC simulation is one of the most popular and useful analysis tools for electrical Power system. Unfortunately the model component for HTS Power Cable is not provided in the PSCAD/EMTDC simulation tool. In this paper, EMTDC model component for HTS Power Cable has been developed considering critical current, critical temperature, magnetic field, and recovery time constant which depend on the sorts of HTS wire. The numerical model of HTS Power Cable in the PSCAD/EMTDC was designed by using the real experimental data obtained from a real HTS 1G wire test. The utility application analysis of HTS Power Cable was also performed using the model component developed. The component for HTS Power Cable could be variously used when the Power system includes HTS Power Cable, especially it will be readily analyzed by the PSCAD/EMTDC in order to obtain the data for the level of fault current, Power flow, and Power losses, and so on.

Dong Zhang - One of the best experts on this subject based on the ideXlab platform.

  • stability analysis of the Cable core of a 10 ka hts dc Power Cable used in the electrolytic aluminum industry
    IEEE Transactions on Applied Superconductivity, 2015
    Co-Authors: Dong Zhang, Zhiqin Zhu, Yuping Teng, Shaotao Dai, Fengyuan Zhang, Weiwei Zhou, Liangzhen Lin
    Abstract:

    High temperature superconducting (HTS) dc Power Cable shows a wide application prospect in the field of Power transmission for its nearly lossless and rather high capacity. IEE has installed a 360-meter long high temperature superconducting (HTS) dc Power Cable at the self-supply Power plant of Zhongfu Industrial Company Ltd. in Gongyi, Henan and the system has operated for two years. The Cable connects a 19.5 MVA/1.5 kA silicon-controlled rectifier, which connects with a 110 kV/1 kV transformer, to the bus bar of an electrolytic aluminum cell. It is designed to carry 10-kA current and the voltage is 1300 V. The HTS dc Power Cable core consists of five conductor layers wound with the spliced Bi-2223 wires with the length of 40 km. The Cable core has five layers and 23 HTS wires in each layer with the outer diameter of 45 mm. The HTS dc Power Cable is fabricated with the spliced superconducting wires which will have effect on the overall superconductivity. Also, since dc output of the rectifier contains a proportion of the ac harmonic ripple, the large dc and small ac will generate the loss in the Cable core. In the operation of the 10 kA HTS dc Power Cable, anode effect will occur in electrolytic aluminum tank, which will lead to a large fault current in the Cable and even lead to the Power off protection. In this paper, stability of the spliced Bi-2223 wire, stability of the Cable core under the cold shrinkage force, loss under the large dc and small ac ripple are analyzed by the theoretical and experimental methods. The test results of ac ripple loss, anode effect, and stable operation are also presented.

  • Testing Results for the Cable Core of a 360 m/10 kA HTS DC Power Cable Used in the Electrolytic Aluminum Industry
    IEEE Transactions on Applied Superconductivity, 2013
    Co-Authors: Dong Zhang, Xi Xu, Yinshun Wang, Yuping Teng, Jingye Zhang, Fengyuan Zhang, Weiwei Zhou, Naihao Song, Zhifeng Zhang, Guomin Zhang
    Abstract:

    IEE has installed a 360-m-long high-temperature superconducting (HTS) dc Power Cable at the self-supply Power plant of Zhongfu Industrial Co., Ltd. in Gongyi, Henan. The Cable connects a 19.5 MVA/1.5 kA silicon-controlled rectifier, which connects with a 110 kV/1 kV transformer, to the bus bar of an electrolytic aluminum cell. It is designed to carry 10 kA current and the voltage is 1300 V. The HTS dc Power Cable core consists of five conductor layers wound with the spliced Bi-2223 wires with the length of 40 km. The Cable core has five layers and 23 HTS wires in each layer with the outer diameter of 45 mm. As the items in this project, testing of 4 to 5 m length prototype Cables, including a 5 m prototype Cable fabricated before the 360 m Power Cable and a 4 m prototype Cable intercepted from the 360 m HTS Power Cable, is conducted. These prototypes are used to assess the design program, fabrication process, and performance of the 360 m/10 kA HTS Power Cable including steady state operation at the 10 kA design current and overcurrent fault capability. The critical current of the 5 and 4 m HTS Power Cable reach 14.3 kA and 13.8 kA at 77 K, 1 μV/cm, respectively. In this paper, the design parameters and fabrication of the 360 m/10 kA HTS dc Power Cable conducted by IEE are presented. The Cable system, installation process and the summary of the results from the testing of 4 and 5 m prototype Cables are described. In addition, details of the initial cool-down process and energizing are presented.

  • Design of a 380 m DC HTS Power Cable
    IEEE Transactions on Applied Superconductivity, 2010
    Co-Authors: Xuemin Liang, Zhiyuan Gao, Zhiqin Zhu, Yinshun Wang, Shaotao Dai, Fengyuan Zhang, Naihao Song, Zhifeng Zhang, Dong Zhang, Xi Xu
    Abstract:

    High temperature superconducting (HTS) Power Cable is an effective Power transmission utility with large capacity, high efficiency, and low loss, especially in DC Power transmission. This paper describes the design of a 380 m HTS Power Cable with rated current of 10 kA for an aluminum electrolysis enterprise. The Power Cable connects the rectifier at a substation at one end with the bus bar of an aluminum electrolysis plant at the other end at Henan Zhongfu Industrial Co. LTD. The Power Cable will be energized in late of 2010. The design of the Cable conductor, cryogenic envelope, termination, refrigeration, and online monitoring system of the 380 m HTS Power Cable are discussed in this paper.

Sven Rzepka - One of the best experts on this subject based on the ideXlab platform.

  • parametric transient thermo electrical pspice model f or a single and dual conductor Power Cable
    2017
    Co-Authors: Ralph Schacht, Sven Rzepka
    Abstract:

    A parametric macro model for a single and dual conductor Power Cable for transient thermo-electrical coupled simulation in PSPICE will be derived. The article depicts the modelling of a simplified, single- and dual conductor Cable and its use during simulation. Its verification against experiment and finite element simulation shows a good agreement. The derived single- and dual conductor PSPICE Cable macro model enables a quick modelling at system level. It offers a time saving transient thermo-electrical simulation under various thermal conditions and Cable geometries and to optimize e.g. size, weight. The approach support the engineer to overlook the thermal influences and temperatures along the Power Cable under real ‘thermal’ assembling conditions in an e.g. car engine room or aircraft.

  • parametric transient thermo electrical pspice model for a Power Cable
    International Workshop on Thermal Investigations of ICs and Systems, 2013
    Co-Authors: Ralph Schacht, Sven Rzepka, B Michel
    Abstract:

    A parametric transient thermo-electrical coupled PSPICE macro model for a Power Cable as well as the verification results of the experimental and finite element simulation will be introduced. The paper describes the modeling and simulation of a simplified, single-core Cable parametric model, for the use in a circuit simulator e.g. PSPICE. The verification of the simulation data between ANSYS and PSPICE has shown good results. The results of comparison between PSPICE and the experimental data are suitable. With the introduced PSPICE Cable model it is now possible to model quickly at system level under various thermal conditions and Cable geometries and to have time saving transient thermo-electrical simulation results to overlook the thermal influences and temperatures along the Power Cable and to optimize e.g. the size, weight (copper diameter, used insulating material) of the Power Cable under real `thermal' assembling conditions in a e.g. car or truck.

Ralph Schacht - One of the best experts on this subject based on the ideXlab platform.

  • parametric transient thermo electrical pspice model f or a single and dual conductor Power Cable
    2017
    Co-Authors: Ralph Schacht, Sven Rzepka
    Abstract:

    A parametric macro model for a single and dual conductor Power Cable for transient thermo-electrical coupled simulation in PSPICE will be derived. The article depicts the modelling of a simplified, single- and dual conductor Cable and its use during simulation. Its verification against experiment and finite element simulation shows a good agreement. The derived single- and dual conductor PSPICE Cable macro model enables a quick modelling at system level. It offers a time saving transient thermo-electrical simulation under various thermal conditions and Cable geometries and to optimize e.g. size, weight. The approach support the engineer to overlook the thermal influences and temperatures along the Power Cable under real ‘thermal’ assembling conditions in an e.g. car engine room or aircraft.

  • parametric transient thermo electrical pspice model for a Power Cable
    International Workshop on Thermal Investigations of ICs and Systems, 2013
    Co-Authors: Ralph Schacht, Sven Rzepka, B Michel
    Abstract:

    A parametric transient thermo-electrical coupled PSPICE macro model for a Power Cable as well as the verification results of the experimental and finite element simulation will be introduced. The paper describes the modeling and simulation of a simplified, single-core Cable parametric model, for the use in a circuit simulator e.g. PSPICE. The verification of the simulation data between ANSYS and PSPICE has shown good results. The results of comparison between PSPICE and the experimental data are suitable. With the introduced PSPICE Cable model it is now possible to model quickly at system level under various thermal conditions and Cable geometries and to have time saving transient thermo-electrical simulation results to overlook the thermal influences and temperatures along the Power Cable and to optimize e.g. the size, weight (copper diameter, used insulating material) of the Power Cable under real `thermal' assembling conditions in a e.g. car or truck.

Liezheng Tang - One of the best experts on this subject based on the ideXlab platform.

  • Hot spot temperature inversion for the single-core Power Cable joint
    Applied Thermal Engineering, 2016
    Co-Authors: Jiangjun Ruan, Daochun Huang, Qinghua Zhan, Liezheng Tang
    Abstract:

    Abstract Monitoring temperature inside the Power Cable joint is of great meaning to the safety of Power distribution, while measuring it directly is infeasible. In this paper, the authors propose a new method to invert real-time hot spot temperature of conductor in the single-core Power Cable joint. This method consists of two parts, the radial-direction temperature inversion (RDTI) in the Cable and axial-direction temperature inversion (ADTI) in the conductor. With this method, hot spot temperature of conductor in the Cable joint could be figured out with the surface temperatures of the Cable nearby the Cable joint and load current, both of which are measurable. Then, the authors carry it out on an actual Power Cable joint in the laboratory, and the inversed temperatures are compared with experiment data, which come from the indoor experiment platform, to validate the availability of this method. The maximum error of this method is 6%, and it shows that this method for temperature inversion is feasible in laboratory scale.