• Title, Summary, Keyword: Superconducting Magnetic Energy Storage (SMES)

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Active and Reactive Power Control Model of Superconducting Magnetic Energy Storage (SMES) for the Improvement of Power System Stability

  • Ham, Wan-Kyun;Hwang, Sung-Wook;Kim, Jung-Hoon
    • Journal of Electrical Engineering and Technology
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    • v.3 no.1
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    • pp.1-7
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    • 2008
  • Superconducting Magnetic Energy Storage (SMES) can inject or absorb real and reactive power to or from a power system at a very fast rate on a repetitive basis. These characteristics make the application of SMES ideal for transmission grid control and stability enhancement. The purpose of this paper is to introduce the SMES model and scheme to control the active and reactive power through the power electronic device. Furthermore, an optimal priority scheme is proposed for the combination of active and reactive power control to be able to stabilize power transient swings.

Research and Development of Superconducting Magnetic Energy Storage system(SMES)

  • Isojima, Shigeki
    • Electrical & Electronic Materials
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    • v.11 no.10
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    • pp.40-45
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    • 1998
  • This paper describes a collaborative work between SEI and KEPCO on the Superconducting Magnetic Energy Storage system (SMES). We have studied two types of magnets. One is the 400kJ class LTS-SMES for testing the power stabilization operated at liquid helium temperature (4.2K) and the other is the 100J class HTS-SMES for confirming the possibility of applying HTS wire to SMES at liquid nitrogen temperature (77k). In this paper, the design of the magnet and the test results are described. Each magnet performed completely at rated operation.

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Superconducting Magnetic Energy Storage (SMES) Control Models for the Improvement of Power System Stability (계통안정도 개선을 위한 SMES 제어모델에 관한 연구)

  • Ham, Wan-Kyun;Kim, Jung-Hoon
    • Proceedings of the KIEE Conference
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    • pp.501-503
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    • 2005
  • Superconducting Magnetic Energy Storage (SMES) can inject or absorb real and reactive power to or from a power system at a very fast rate on a repetitive basis. These characteristics make the application of SMES ideal for transmission grid control and stability enhancement. The purpose of this paper is to introduce the SMES model and scheme to control the active and reactive power through the power electronic device.

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Characteristic of a Superconducting Magnet for 3MJ SMES (3MJ SMES용 초전도 마그네트 특성연구)

  • 김해종;성기철;조전욱;배준한;김석환;심기덕;이언용;김해준;권영길
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.11
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    • pp.572-576
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    • 2003
  • For quite a long time various researches and developments of superconducting magnetic energy storage(SMES) device have been done for enhancement of power qualify control of sensitive electric load. This paper describes the design. fabrication and experimental results for the 3MJ SMES magnet made by using the design code of a SMES device that we developed. A computer code was developed to find the parameters of the SMES magnet which has minimum amount of superconductor for the same stored energy, and the 3MJ SMES magnet was designed based upon that. And the 3MJ SMES magnet designed based upon those. In addition, 3MJ SMES magnet was made based on several research results which were ramp up to 1㎄ without quench.

Quench Characteristics of the Superconduction Cable for a 0.7 MJ UPS (0.7 MJ UPS용 초전도 케이블의 ?치 특성)

  • 류경우;김해종
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.11 no.7
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    • pp.565-570
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    • 1998
  • Recently a few MJ superconducting magnetic energy storage ($\mu$ SMES) devices become commerci-ally available as one of the energy storage devices for uniterruptible power supply (UPS) systems. For such a ($\mu$ SMES) devics, a few kA class superconducting cables with high current density, high stability and excellent pulse characteristics are required. To acquire data for the superconduction cables related to design and fabrication of a 0.7 MJ $\mu$ SMES device, we tested critical currents and quench characteristics for several winding tensions and various remping rates especially. It is shown from the results that winding tensions have much influence on quench currents of the $\mu$ SMES devices.

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Fabrication and Test of a 1 MJ Superconducting Energy Storage System for the Sensitive Load (민감부하 보상용 1 MJ 초전도 에너지저장 시스템 제작 및 시험)

  • 성기철;유인근;한성룡;정희종
    • Progress in Superconductivity and Cryogenics
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    • v.3 no.2
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    • pp.39-43
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    • 2001
  • For several decades researches and development on superconducting magnetic energy storage(SMES) system have been done for efficient electric power management. Korea Electrotechnology Research Institute (KERI) have developed of a 1MJ , 300kVA SMES System for improving power quality in sensitive electric loads. It consists of an IGBT (Insulated Gate Bipolar Transistor) based power conversion module. NbTi mixed matrix conductor superconducting magnet and a cryostat with HTS current leads. We developed the code fro design of a SMES magnet. Which could find the parameters of the SMES magnet having minimum amount of superconductors for the same store denerby. and designed the 1 MJ SMES magnet by using it . And we have design and fabricated cryostat with kA class HTS current leads for a 1 MJ SMES System. This paper describes the design fabrication and test results for a 1MJ SMES System.

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A Study on the Design, Fabrication and Characteristics Test of 25KJ Superconducting Magnetic Energy Storage (25KJ 초전도 에너지 저장장치의 설계,제작 및 특성 시험)

  • 홍원표;원종수;이송엽;이승원
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.37 no.10
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    • pp.683-693
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    • 1988
  • For the economical and reasonable operation of electric power system according to continual increase of electric power demand and decrease of load factor, the potential application of superconducting magnertic energy storage [SMES] with high efficiency and fast response in the electric utility is receiving attractive attension. In the light of this background, to confirm the basic principle of SMES, theoretical study, design technique and fabrication procedure for superconducting coil, current lead, cryostat, measuring and protection system of SMES are described in detail. Especially, a new design technique for superconducting coil and current lead is porposed and it was proved experimentally by the performance test of SMES which is developed for the first time in our country. At the peak operating current 200A, the maximum magnetic field amd stored energy of the coil are 3.52T and 2500J, espectively. The thermal and mechanical stability of 2500J SMES is also confirmed experimetally by its characteristics test, AC loss, protection system, charge and discharge test. The experimetal results show good characteristics of energy storage system.

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Test and Fabrication of the 1MJ Superconducting Magnetic Energy Storage System (1MJ급 초전도에너지저장시스템 제작 및 평가)

  • Kim, H.J.;Seong, K.C.;Cho, J.W.;Kim, S.W.;Bae, J.H.;Lee, E.Y.;Kwon, Y.K.;Ryu, K.
    • Proceedings of the KIEE Conference
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    • pp.685-687
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    • 2002
  • For several decades researches and developments on superconducting magnetic energy storage (SMES) system have been done for efficient electric power management. Korea Electrotechnology Research Institute(KERI) have developed of a 1MJ. 300kVA SMES System for improving power quality in sensitive electric loads. We developed the code for design of a SMES magnet. which could find the parameters of the SMES magnet having minimum amount of superconductors for the same stored energy. and designed the 1MJ SMES magnet by using it. This paper describes the design. fabrication and experimental results for the SMES magnet. cryostat, HTS current lead and power converter.

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Application of Nonlinear PID Controller in Superconducting Magnetic Energy Storage

  • Peng Xiaotao;Cheng Shijie;Wen Jinyu
    • International Journal of Control, Automation, and Systems
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    • v.3 no.spc2
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    • pp.296-301
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    • 2005
  • As a new control strategy, the Nonlinear PID (NLPID) controller has been introduced successfully in power systems. The controller is free of planting model groundwork during the design procedure and is therefore able to be achieved quite simply. In this paper, a nonlinear PID controller used for a superconducting magnetic energy storage (SMES) unit connected to a power system is proposed. The purpose of designing such a controller is to improve the stability of the power system in a relatively wide operation range. The design procedure takes into account the active and reactive power cooperative control scheme as well as the simple structure so as to be more apt to practical utilization. Simulation is carried out to investigate the performance of the proposed controller in a high order nonlinear power system model under the. MATLAB environment. The results show satisfactory performance and good robustness of the controller. The feasibility of the controller is testified as well.

A Hybrid Energy Storage System Using a Superconducting Magnet and a Secondary Battery

  • ISE Toshifumi;YOSHIDA Takeshi;KUMAGAI Sadatoshi
    • Proceedings of the KIPE Conference
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    • pp.534-538
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    • 2001
  • Energy storage devices with high energy density as well as high power density are expected to be developed from the point of view of compensation of fluctuating load and generated power by distributed generations such as wind turbines, photovoltaic cells and so on. SMES (Superconducting Magnetic Energy Storage) has higher power density than other energy storage methods, and secondary batteries have higher energy density than SMES. The hybrid energy storage device using SMES and secondary batteries is proposed as the energy storage method with higher power and energy density, the sharing method of power reference value for each storage device, simulation and experimental results are presented.

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