Fault Current Limiter Dynamic Voltage Restorer (FCL-DVR) With Reduced Number of Components

Ghavidel, Pedram; Farhadi, Masoud; Dabbaghjamanesh, Morteza; Jolfaei, Alireza; Sabahi, Mehran

doi:10.1109/jestie.2021.3051586

Cited by 20 publications

(6 citation statements)

References 30 publications

(39 reference statements)

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“…In the current research landscape, various approaches are being explored to suppress fault currents in DC sub-grids within hybrid microgrid systems. Fault current limiters (FCLs) are one of the primary methods used to limit fault currents and prevent damage to system components [19][20][21][22][23][24]. Different types of FCLs, such as superconducting FCLs, resistive FCLs, and hybrid FCLs, are being studied for their effectiveness in reducing fault currents during fault events.…”

Section: Introductionmentioning

confidence: 99%

Propagation Mechanism and Suppression Strategy of DC Faults in AC/DC Hybrid Microgrid

Xiao,

Ren,

Cao

et al. 2024

Processes

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Due to their efficient renewable energy consumption performance, AC/DC hybrid microgrids have become an important development form for future power grids. However, the fault response will be more complex due to the interconnected structure of AC/DC hybrid microgrids, which may have a serious influence on the safe operation of the system. Based on an AC/DC hybrid microgrid with an integrated bidirectional power converter, research on the interaction impact of faults was carried out with the purpose of enhancing the safe operation capability of the microgrid. The typical fault types of the DC sub-grid were selected to analyze the transient processes of fault circuits. Then, AC current expressions under the consideration of system interconnection structure were derived and, on this basis, we obtained the response results of non-fault subnets under the fault process, in order to reveal the mechanism of DC fault propagation. Subsequently, a current limitation control strategy based on virtual impedance control is proposed to address the rapid increase in the DC fault current. On the basis of constant DC voltage control in AC/DC hybrid microgrids, a virtual impedance control link was added. The proposed control strategy only needs to activate the control based on the change rate of the DC current, without additional fault detection systems. During normal operations, virtual impedance has a relatively small impact on the steady-state characteristics of the system. In the case of a fault, the virtual impedance resistance value is automatically adjusted to limit the change rate and amplitude of the fault current. Finally, a DC fault model of the AC/DC hybrid microgrid was built on the RTDS platform. The simulation and experimental results show that the control strategy proposed in this paper can reduce the instantaneous change rate of the fault state current from 19.1 kA/s to 2.73 kA/s, and the error between the calculated results of equivalent modeling and simulation results was within 5%. The obtained results verify the accuracy of the mathematical equivalent model and the effectiveness of the proposed current limitation control strategy.

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Section: Introductionmentioning

confidence: 99%

Propagation Mechanism and Suppression Strategy of DC Faults in AC/DC Hybrid Microgrid

Xiao,

Ren,

Cao

et al. 2024

Processes

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“…Hence, lower loss and cost can be two important issues that Ref. [37] tries to give a solution for them by introducing a topology with reduced number of switches, gate drive, and control circuit components. Ref.…”

Section: Introductionmentioning

confidence: 99%

A New Multifunctional Protection System for Reducing Fault Current, Ferroresonance Overvoltage, and Voltage Fluctuations in Power Networks

Bashoo

Jazaeri

2022

International Transactions on Electrical Energy Systems

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This paper introduces a multifunctional protective system to mitigate more likely threats in power networks. The proposed device can cope with short circuit current, voltage sag, or swell and dangerous overvoltages due to ferroresonance by elaborate switching in its unified structure. The switching is in fact the main key for playing among the functions and altering the structure. Since the switches receive the control system’s commands based on what happens in the network, an intelligent controller has to be designed to interpret four operating modes and activate the correct function. Following the activation command, the structure is customized through switching action and the network is equipped with the corresponding protection function. The proposed scheme by employing minimum components and therefore achieving significant saving in costs can meet all expectations satisfactorily. Moreover, the control system’s performance is examined by a set of numerical simulations in a Matlab/Simulink environment. The obtained results show that the proposed device is feasible and successfully performs all three functions independently.

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“…In order to provide acceptable power quality for sensitive loads, both voltage fluctuations and short circuit current limiting concerns must be addressed. In recent years, it has become increasingly appealing to combine these two protective devices and create a dual-function FCL-DVR that controls voltage fluctuations while also reducing short circuit current [7][8][9][10][11][12]. The most significant advantage of this dual function device is the reduction of device components and the realization of a cost-effective converter.…”

Section: Introductionmentioning

confidence: 99%

Design and control of a dual-function device with simultaneous DVR and FCL capability

Asteraki¹,

Saradarzadeh²,

Pourfar³

2022

Scientia Iranica

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Dynamic voltage restorer (DVR) is a protecting device for sensitive loads which compensates grid voltage fluctuations. Although using fault current limiting devices (FCL) is a method of protecting loads and electrical networks against short circuits. In recent years, some methods have been proposed to combine these two devices to reduce the cost of converters and use the benefits of each device simultaneously. A new topology and control method to combine a DVR and an FCL is presented in this paper, which with just adding a switch to the conventional DVR, the FCL performance will be available for the network. The FCL-DVR has been developed to provide excellent dynamic performance and faster response time to network failures while maintaining appropriate reliability and a low converter cost. The performance ability of the proposed device is investigated by simulation results.

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Fault Current Limiter Dynamic Voltage Restorer (FCL-DVR) With Reduced Number of Components

Cited by 20 publications

References 30 publications

Propagation Mechanism and Suppression Strategy of DC Faults in AC/DC Hybrid Microgrid

Propagation Mechanism and Suppression Strategy of DC Faults in AC/DC Hybrid Microgrid

A New Multifunctional Protection System for Reducing Fault Current, Ferroresonance Overvoltage, and Voltage Fluctuations in Power Networks

Design and control of a dual-function device with simultaneous DVR and FCL capability

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