6.6 kV/1.5 kA-class superconducting fault current limiter development

Ito, Daisuke; Yoneda, Eriko; Tsurunaga, Kazuyuki; Tada, Takamitsu; Hara, T.; Ohkuma, Takeshi; Yamamoto, Takashi

doi:10.1109/20.119905

Cited by 48 publications

(6 citation statements)

References 4 publications

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“…A prospective solution to the stability and security issues mentioned above is to employ fault current limiters. Different categories of fault current limiter such as resistive, inductive, superconducting, flux-lock, DC reactor, and resonance FCL [21][22][23][24][25] have been presented for limiting fault currents as well as improving the stability of power systems. Resistive-type and inductive-type FCLs provide approximately zero impedance under normal condition, while they provide high-impedance resistors or inductors under a fault condition.…”

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confidence: 99%

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been developed to limit the fault current during the inception of system disturbances. Real and reactive power controllers for the VSC-HVDC have been developed based on current control mode. DC link voltage control has been achieved by a feedback mechanism such that net power exchange with DC link capacitor is zero. A grid-connected VSC-HVDC system and a wind farm integrated VSC-HVDC system along with the proposed BFCL and associated controllers have been implemented in a real time digital simulator (RTDS). Symmetrical three phase as well as different types of unsymmetrical faults have been applied in the systems in order to show the effectiveness of the proposed BFCL solution. DC link voltage fluctuation, machine speed and active power oscillation have been greatly suppressed with the proposed BFCL. Another significant feature of this work is that the performance of the proposed BFCL in VSC-HVDC systems is compared to that of series dynamic braking resistor (SDBR). Comparative results show that the proposed BFCL is superior over SDBR in limiting fault current as well as improving system fault ride through (FRT) capability.Moreover, VSC-HVDC offers a solution for many problems faced nowadays by power networks such as network congestion, grid reinforcement, multi-terminal DC (MTDC) operation and asynchronous operations of two different grids [10]. Different types of VSC topologies are proposed in the literature [11,12] including two level, three level and multilevel converters for HVDC transmission. Multilevel means more than two voltage levels can be achieved in one phase leg, which reduces the switching times of valve and makes the voltage wave form closer to a sinusoidal curve. Line to neutral voltage waveforms of both two-level and three-level converters with PWM are discussed and compared in [12].However, despite the numerous advantages, VSC-HVDC systems face difficulties in dealing with different grid faults [13]. Fault ride-through (FRT) capability enhancement is one of the main requirements for wind farm-integrated VSC-HVDC systems [14,15]. During system faults, bulk power interruptions must be avoided by keeping the HVDC system energized, otherwise, the system may face serious instability due to this bulk power interruption. Modular multilevel converter-based VSC-HVDC system topologies can provide enhanced fault ride-through capability [16]. In [17,18] FRT capability as well as transient stability improvement have been reported by applying various VSC control techniques. A power synchronization control technique has been proposed in [19] with coordination between wind turbines and HVDC controllers in order to achieve FRT ...

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confidence: 99%

Fault Ride-through Capability Enhancement of Voltage Source Converter-High Voltage Direct Current Systems with Bridge Type Fault Current Limiters

Alam

Abido

2017

Energies

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“…This technology allowed to build AC coils with 500VA capacity,23) superconducting winding of 1 MVA-class pow er transf ormer24) as well as windings of 6.6 kV/1.5kA-class superconducting fault cur rent limiters. 25) For windings with other form than cylin drical e.g. for fully superconducting turbo generator26) or superconducting linear induc tion motor27) good fixation of ACMFC can be ahieved only by epoxy-impregnation (see 28)).…”

Section: Energy Saving Criterionmentioning

confidence: 99%

AC Applications of Superconductors at 50/60 Hz Frequency.

Hlasnik

Ito

1993

Journal of the Cryogenic Society of Japan

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This paper presents a review of the research and development of low loss AC composites with very fine superconducting filaments as well as of their applications at 50/60Hz frequency. At first a review of formulae for calculating AC losses in a superconducting multifilamentary composite (MFC) placed in an AC external transverse magnetic field is given and the energetical feasibility criterion for an AC superconducting winding is formulated. Then it is shown how this criterion has influenced the development of AC MFC. Short description of the technology and of characteristic parameters of actually produced AC MFC, cables and windings is presented. The results of feasibility studies and of R & D works on superconducting AC devices and ma chines such as superconducting fault current limiter, power transformer, fully superconducting generator, linear induction motor, magnetic energy storage system and thermally controlled super conducting switches are reviewed. The quench current degradation of several kA-class cables as well as of epoxy impregnated windings with non-cylindrical form is the most important issue of the further development of superconductor applications at 50/60Hz frequency.

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“…Using fuses and Fault Current Limiters (FCL) are common methods for controlling the fault current [8][9][10]. Fault current limiters, according to their types of construction can be classified into superconducting and nonsuperconducting FCL [11][12][13]. The fuses are due to the interruption of current during a fault that results in its costs and consequences and non-superconducting FCL due to the long response time in high current, lose their performance [14].…”

Section: Introductionmentioning

confidence: 99%