Saturated Core Fault Current Limiters in a Live Grid

Nikulshin, Yasha; Wolfus, Y.; Friedman, A.; Yeshurun, Y.; Rozenshtein, V.; Landwer, D.; Garbi, Uri

doi:10.1109/tasc.2016.2524444

Cited by 32 publications

(19 citation statements)

References 10 publications

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“…The rectifying devices nowadays are very mature [5,6]. Developing a rectifier with large capacity and good controllability will affect the design cycle of the system.…”

Section: Design Of the DC Excitation Power Supply Controllermentioning

confidence: 99%

Design and study of DC excitation power controller of superconductor fault current limiter

Li¹

2017

Vib. proced.

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Abstract. This paper provides a theoretical basis for high voltage magnetization and low voltage constant current excitation. The design structure of DC excitation power supply is put forward. As a controlled rectifier device, the 6RA70 is the core control unit of the superconducting fault current limiter. The problem that DC excitation power supply is difficult to control under high voltage and large current is effectively solved. The requirements of high voltage magnetization and constant current excitation control are expounded, and the switching methods between two states are described. PLC is used to establish a digital control system for networks. This paper provides a reference for the operation of superconducting fault current limiter.

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“…The rectifying devices nowadays are very mature [5,6]. Developing a rectifier with large capacity and good controllability will affect the design cycle of the system.…”

Section: Design Of the DC Excitation Power Supply Controllermentioning

confidence: 99%

Design and study of DC excitation power controller of superconductor fault current limiter

Li¹

2017

Vib. proced.

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“…However, these structures increases the energy consumption during the normal operation of the grid due to lessen the variation range between low and high resistance of SCFCL. The structure that all AC coils wound on the same core cannot be applied in the three-phase grounding short circuit fault [32]- [34]. On the basis of the original loosely-coupled structure, an additional DC coil wound on the AC columns, which not only reduces magnetic leakage, but also reduces the use of ferromagnetic materials which increases the requirement of the DC excitation power [35].…”

Section: Introductionmentioning

confidence: 99%

Novel Topology of DC Energy-Released Circuit For Saturated-Core Fault Current Limiter

et al. 2019

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The saturated-core fault current limiter (SCFCL) has been studied by several scholars in the past decades. However, these studies have mainly focused on the AC coils of the SCFCL, the DC excitation has seldom been mentioned. In this paper, the DC coil of SCFCL is studied as well as the influence of the novel structure of tightly-coupled SCFCL (TSCFCL) on the voltage of DC coil. A novel DC energyreleased circuit is proposed, which overcomes the shortcoming of traditional single topology whose energyreleased speed is limited by withstanding voltage of IGBT. In order to select a suitable structure of air gap for fault current limiter, the effects of different structures on the saturation of the core are studied. A novel simulation method is presented in this paper which can overcome the drawback of traditional finite element analysis cannot simulate the switching characteristics of IGBT under high frequency. Finally, a prototype is manufactured to verify the theory of this paper. INDEX TERMS Saturated-core fault current limiter, DC energy-released circuit, air-gap, finite element analysis, magnetic field division.

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“…This SCFCL exhibits several features like passive and instant triggering, passive and instant recovery after fault, and ability to control and tune various parameters of the current limiter . Even though SCFCL has been reported for grid application, but to ride through LVRT issues in DFIG system have not been yet used. The objectives of the paper are the following: Incorporation of SCFCL in to DFIG‐based WECS; Prototype verification of SCFCL with design aspects; Efficacy is verified under several conditions (under symmetrical and asymmetrical fault condition); To see the effectiveness of the proposed approach (its performance is compared with the conventional vector control scheme and crowbar system). This paper is organized as follows: The introduction follows with DFIG modelling in Section .…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Enhancement of low‐voltage ride through of wind energy conversion system using superconducting saturated core fault current limiter

Tripathi

Sahoo

Chatterjee

2018

Int Trans Electr Energ Syst

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Summary For enhancing the fault ride through (FRT) capability of doubly fed induction generator (DFIG), the major concern is to remain connected with the grid for maintaining the grid code. For improving this entity, saturated core fault current limiter (SCFCL)‐based protection system has been used in the DFIG system for protecting it from the fault current during fault conditions. The main features of transformer‐type three‐limb SCFCL is that the Alternating Current (AC) coils embedded across the two limbs, and the Direct Current (DC) coils embedded across the other remaining limb. The main features of SCFCL is that the core is saturated during normal operating condition, and during the fault condition, high current generates sufficient magnetic flux in the AC coil, which drives each core out of the saturation. Because of this, SCFCL operates in high‐permeability zone and increases the impedance of the AC coil, which limits the fault current. In this paper, the above behaviour of SCFCL under normal and faulty condition has been analysed by simulated mathematical modelling and verifying it with the experimental setup. In addition to conserve good FRT performance, the fault consequences in DFIG system such as rotor current, DC link voltage, and torque fluctuations are analysed. Also, the simulation result justifies the efficacy of SCFCL compared with the other conventional schemes.

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Saturated Core Fault Current Limiters in a Live Grid

Cited by 32 publications

References 10 publications

Design and study of DC excitation power controller of superconductor fault current limiter

Design and study of DC excitation power controller of superconductor fault current limiter

Novel Topology of DC Energy-Released Circuit For Saturated-Core Fault Current Limiter

Enhancement of low‐voltage ride through of wind energy conversion system using superconducting saturated core fault current limiter

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