Interrupting Short-Circuit Direct Current Using an AC Circuit Breaker in Series with a Reactor

Kulkarni, Saurabh; Santoso, Surya

doi:10.1155/2012/805958

Cited by 14 publications

(7 citation statements)

References 20 publications

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“…Recent interest centers on Direct Current (DC) applications. To name but a few, Kulkarni et al [19] looked at the use of AC circuits breakers with reactors for protection of DC circuits, and Mokhberdoran et al [20] designed solid state breakers for the DC circuits. More related to the work in this article, Deb et al [21] analyzed and classified the toggle mechanisms used in circuit breakers.…”

Section: Literature Reviewmentioning

confidence: 99%

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

Ahuett–Garza

Melecio

Orta

2018

Mathematical Problems in Engineering

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A new mesoscale thermosensitive actuator design for circuit breakers based on a U-shaped compliant mechanism was introduced as a potential replacement for bimetal strips in miniature circuit breakers. In a previous study, the response of this design to the thermal fields produced by a steady current flow was analyzed. This article presents a modal analysis of the compliant mechanism. The goal of the analysis is to compare the natural frequencies of the mechanism with the frequency of the magnetic loads caused by the flow of the alternating currents. Simulations with simple beam elements and 3D elements are presented and results are compared with experimental measurements. The study finds that the natural frequency of the mechanism differs by a factor of about 8 with the AC frequency. The conclusion is that the proposed compliant mechanism design’s performance as a thermal actuator will not be affected by the cyclic loads generated by the forces induced by the AC magnetic fields.

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Section: Literature Reviewmentioning

confidence: 99%

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

Ahuett–Garza

Melecio

Orta

2018

Mathematical Problems in Engineering

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“…The second dc protection option is by creating zero crossing points for dc fault currents. This is achieved by using a series reactor with conventional electro-mechanical circuit breakers (EMCBs) on the dc side [20]. The reactor is used to limit the fault magnitude, cause the dc fault current to oscillate, thus creating a zero crossing, with the EMCB interrupts the fault at the first zero crossing.…”

Section: B Issues With Existing DC Protection Optionsmentioning

confidence: 99%

An Advanced Protection Scheme for Enabling an LVDC Last Mile Distribution Network

Emhemed

Burt

2014

IEEE Trans. Smart Grid

167

100

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Low voltage direct current (LVDC) distribution systems have the potential to support future realization of smart grids and enabling of increased penetration of distributed renewables, electric vehicles, and heat pumps. They do, however, present significant protection challenges that existing schemes based on dc fuses and conventional electro-mechanical circuit breakers cannot manage due to the nature of dc faults and slow device performance. Therefore, this paper presents an advanced protection scheme that addresses the outstanding challenges for protecting an LVDC last mile distribution network. The scheme takes advantage of advanced local measurements and communications that will be naturally integrated in smart grids, and the excellent level of controllability of solid state circuit breakers. It thus provides fast dc fault detection and interruption during dc transient periods, in addition to achieving fault limitation and fast reliable restoration. The introductory part of the paper quantifies the potential benefits of LVDC last mile distribution networks, and discusses the potential LVDC architectures that best utilize the existing plant. Based on the new LVDC architectures, a typical U.K. LV network is energized using dc and modeled, and is used as a case study for investigating the protection issues and evaluating the new protection scheme performance through simulation.

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“…One of the options for clearing the DC fault is to isolate interconnected AC-sides through front-end AC breakers [25]. Another solution might be usage of current limiting DC fuses [26].…”

Section:  DC Capacitor Voltagementioning

confidence: 99%

AC/DC Converter with DC Fault Suppression for Aircraft +/− 270 VDC Distribution Systems

Sztykiel¹,

Fletcher²,

Norman³

et al. 2015

SAE Technical Paper Series

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The increasing electrical demand in commercial and military aircraft justifies a growing need for higher voltage DC primary distribution systems. A DC system offers reduced power losses and space savings, which is of major importance for aircraft manufacturers. At present, challenges associated with DC systems include reliable fast acting short circuit protection. Solid State Contactors (SSC) have gained wide acceptance in traditional 28 VDC secondary systems for DC fault interruption. However, the reliable operation at higher operating voltages and currents requires further technology maturation.This paper examines a supporting method to SSC for more reliable fault mitigation by investigating bidirectional AC/DC converter topology with DC fault current blocking capability. Replacement of semiconductor switches with full bridge cells allows instant reversal of voltage polarities to limit rapid capacitor discharge and machine inductive currents. Demonstration of this capability is realized by tracking DC fault currents in time-domain simulations of a ±270 VDC converter dynamic model built in MATLAB-Simulink.Simulation results have shown that the modified power converter topology provides a fast response to DC faults and it can be considered as a back-up to SSCs in clearing faults in ±270 VDC distribution systems.

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Interrupting Short-Circuit Direct Current Using an AC Circuit Breaker in Series with a Reactor

Cited by 14 publications

References 20 publications

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

Modal Analysis of a New Thermosensitive Actuator Design for Circuit Breakers Based on Mesoscale U-Shaped Compliant Mechanisms

An Advanced Protection Scheme for Enabling an LVDC Last Mile Distribution Network

AC/DC Converter with DC Fault Suppression for Aircraft +/− 270 VDC Distribution Systems

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