Investigation of DC hybrid circuit breaker based on high-speed switch and arc generator

Wu, Yifei; Rong, Mingzhe; Wu, Yi; Yang, Fei; Li, Mei; Zhang, Jianying; Han, Guohui; Niu, Chunping; Hu, Yang

doi:10.1063/1.4907541

Cited by 11 publications

(3 citation statements)

References 16 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the temperature is high, the high collision between heavy species and electrons keeps the electron temperature close to the heavy particles' temperature. In other words, the high-current arc is approximately in the thermal equilibrium state, as found from many publications [67,68]. From the simulation results, the temperature fields of heavy species and electrons are generally consistent with each other (please see the contours of θ = T e /T h in the supplementary material).…”

Section: Arc Temperature and Incident Radiationsupporting

confidence: 77%

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

Huo¹,

Wang²,

Cao³

2020

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Arc splitting is one of the most important processes in accomplishing a power interruption by multiplying the number of voltage drops. During arc-plate interaction, the arc roots erode and vaporize the metals which significantly alters the gas composition and plasma properties, such as the radiation absorption coefficient. In this work, we perform a 3D computational study of arc splitting in a circuit breaker. In order for the study to be systematic, the metal vaporization, species transport, and radiative heat transfer are integrated into the magnetohydrodynamics modeling with some special considerations. Firstly, the simulation considers the ferromagnetic effect of steel plates. Secondly, the metal-vapor-enhanced radiation is numerically implemented by the discrete ordinate method with consideration given to the banded radiation spectrum. Thirdly, the simulation model incorporates a near-electrode layer to implement the voltage drop and imposes additional heat flux on the arc spots. The simulation results show that the metal vaporization not only influences the arc dynamics (via Stefan flow) but also enhances the local radiation intensity. Besides, due to the ferromagnetic effect, the magnetic field increases dramatically during arc splitting. However, the self-induced magnetic force has quite a different influence on the motion of sub-arcs, which prevents even and concurrent arc splitting. This simulation reveals that the magnetic-field-induced uneven splitting can be compensated by the enhanced pressure wave or externally applied transversal magnetic field. This study is expected to explore more applications in simulating arc interruption and improve the design of highly-efficient circuit breakers.

show abstract

Section: Arc Temperature and Incident Radiationsupporting

confidence: 77%

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

Huo¹,

Wang²,

Cao³

2020

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Solid-state circuit breakers have the disadvantage of a large rated current loss and need additional heat dissipation devices [5][6][7]. With the development of DC breaking technology, many new technologies have appeared in recent years [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Reference [11] proposes a new design of a DC hybrid circuit breaker based on a highspeed switch (HSS) and arc generator (AG), which can drastically profit from low heat loss in a normal state and fast current breaking under a fault state. The AG is designed according to the magnetic pinch effect of liquid metal.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of the High Current Rising Rate Hybrid DC Current Limiting Circuit Breaker

Wang

Zhuang

et al. 2023

Electronics

View full text Add to dashboard Cite

To solve the problem of the high rising rate and large peak value of the expected current of the short-circuit current in marine DC power system faults, a hybrid DC current limiting circuit breaker scheme based on a high-speed electromagnetic repulsion mechanism is proposed. A parameter selection model is constructed by comprehensively considering the short-time withstand of the thyristor, the volume of the commutation circuit, and capacitor energy, and the optimal value of the commutation circuit parameters at a certain voltage level is obtained. The finite element mathematical model of the high-speed electromagnetic repulsion mechanism is established by coupling the electromagnetic force field, which enables the deformation process of the mechanism under the condition of high acceleration to be considered. The von Mises yield criterion is adopted as the mechanical boundary condition in the design of a high-speed electromagnetic repulsion mechanism, which solves the problem of the long inherent time of opening. The experiment platform is built, and the experiment under the fault condition with a current rising rate of 20 A/μs is completed. The arcing time, commutation time, zero-voltage recovery time, and contact movement characteristics are obtained, which meet the design requirements, verify the effectiveness of the analysis, and lay a solid foundation for further research and development of the current limiting circuit breakers for medium voltage DC systems.

show abstract

A novel design of energy absorption branch for HVDC circuit breakers

Gao,

You,

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

Metal oxide varistors (MOV) used for energy absorption branch in DC circuit breakers are complex enough to meet the requirements for small volume, light weight, and reliability in future high-voltage direct current (HVDC) grids. Therefore, a new energy absorption branch circuit that combines MOV and a liquid metal alloy energy absorber (LMEA) is proposed. Based on the constructed equivalent mathematical model of LMEA, the working principle and energy absorption process of MOV and LMEA in DC breaking process are analysed in PSCAD/EMTDC simulation software. Results demonstrate that LMEA, in contrast to MOV alone, absorbs 2.12 MJ of energy, constituting 35.6% of the total energy. Moreover, LMEA enhances energy dissipation density while reducing volume. Experimental analysis reveals MOV’s energy absorption mechanism via achieving residual voltage with ZnO varistor’s non-linear properties, swiftly transitioning from high to low resistance states to absorb energy. Conversely, LMEA relies on pulse current amplitude to initiate internal arcing, sharply increasing internal resistance for effective energy absorption. Experimental findings validate LMEA’s contribution of one-third of total energy absorption when pulse current amplitude reaches critical arcing threshold, consistent with simulation results. The results provide theoretical support for the engineering application of the new liquid metal alloy energy absorption in DC circuit breakers.

show abstract

Investigation of DC hybrid circuit breaker based on high-speed switch and arc generator

Cited by 11 publications

References 16 publications

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

Analysis and Design of the High Current Rising Rate Hybrid DC Current Limiting Circuit Breaker

A novel design of energy absorption branch for HVDC circuit breakers

Contact Info

Product

Resources

About