Numerical Study on Arc Plasma Behavior During Arc Commutation Process in Direct Current Circuit Breaker

Yang, Fei; Ma, Ruiguang; Wu, Yi; Sun, H.; Niu, Chunping; Rong, Mingzhe

doi:10.1088/1009-0630/14/2/16

Cited by 28 publications

(11 citation statements)

References 13 publications

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“…According to the first method, conventional mechanical DC circuit breakers are applied, which utilize the arc plasma to build up the inverse voltage opposing the supply voltage in order to create current zero, such as air DC circuit breakers used in low voltage field. 2,3 However, these switches generally react and open slowly during the breaking process and can hardly limit the peak value of fault current. Moreover, with the system supply voltage grade enhanced, it is extremely difficult to break the fault current by improving the arc voltage to tens or hundreds of kV.…”

Section: Introductionmentioning

confidence: 99%

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

Rong

et al. 2015

Review of Scientific Instruments

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Articles you may be interested inInvestigation on critical breakdown electric field of hot sulfur hexafluoride/carbon tetrafluoride mixtures for high voltage circuit breaker applications A new design of DC hybrid circuit breaker based on high-speed switch (HSS) and arc generator (AG), which can drastically profit from low heat loss in normal state and fast current breaking under fault state, is presented and analyzed in this paper. AG is designed according to the magnetic pinch effect of liquid metal. By utilizing the arc voltage generated across AG, the fault current is rapidly commutated from HSS into parallel connected branch. As a consequence, the arcless open of HSS is achieved. The post-arc conducting resume time (∆t c ) of AG and the commutation original voltage (U c ), two key factors in the commutation process, are investigated experimentally. Particularly, influences of the liquid metal channel diameter (Φ) of AG, fault current rate of rise (di/dt) and U c on ∆t c are focused on. Furthermore, a suitable U c is determined during the current commutation process, aiming at the reliable arcless open of HSS and short breaking time. Finally, the fault current breaking test is carried out for the current peak value of 11.8 kA, and the validity of the design is confirmed by the experimental results. C 2015 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 99%

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

Rong

et al. 2015

Review of Scientific Instruments

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“…The arc numerical model is based on the MHD theory, which has been widely used in circuit breakers [8][9][10][11][12][13][14]. The conservation equations of mass, momentum, energy and electromagnetic field are solved to describe arcing process.…”

Section: Numerical Modelmentioning

confidence: 99%

Simulation of arcs for DC relay considering different impacts

Huang¹,

Sun²,

Niu³

2019

Plasma Sci. Technol.

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Recently DC relay has been concerned as a key component in DC power distribution, management and control systems like aircraft, new energy vehicle, IT and communication industries. Ordinarily, magnetic force and contact moving speed have great influence on arc behaviours in the breaking process. This paper focuses on the numerical investigation of arc during the contact opening process in a real 400 V/20 A DC relay product coupling with an inductive load circuit. A 3D air arc model based on the magneto-hydrodynamic theory was built and calculated. A method coupling different computational software was used to take the nonlinear permanent magnet and contact opening process into consideration simultaneously. Arc behaviours under different magnetic field and contact opening speed were presented and discussed carefully. It has been found that the increase of the magnetic field is beneficial to the quick build-up of arc length and voltage. Arc breaking duration becomes shorter with the increase in contact opening speed from 63.5 rad s −1 to 94.5 rad s −1 , such reduction is less significant with an increase of opening speed from 94.5 rad s −1 to 118.5 rad s −1 .

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“…[14,27,43] For the transient arc sheath formation process, by assuming that the sheath is a nonlinear resistance, the arc extinguishing performance of DCCB is studied in Ref. [44]. Although this hypothesis truly reflected the properties of the sheath voltage drop, the process of sheath formation, which is determined by the motion of the particles and the space charge distribution, was not analyzed in the model.…”

Section: Introductionmentioning

confidence: 99%

Fluid-chemical modeling of the near-cathode sheath formation process in a high current broken in DC air circuit breaker

Peng

Duan

et al. 2023

Chinese Phys. B

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When the contacts of medium-voltage DC air circuit breaker (DCCB) are separated, the energy distribution of arc is determined by the formation process of near electrode sheath. So, the voltage drop through the near electrode sheath is an important means to build-up the arc voltage, which determines the current-limiting performance of the DCCB directly. A numerical model describing the near electrode sheath formation process can provide insight into the physical mechanism of the arc formation and thus provide a method for arc energy regulation. In this work, a two-dimensional axisymmetric time-varying model of a medium-voltage DCCB arc when high-current interrupted was established based on a fluidchemical model involving 16 kinds of species and 47 collision reactions. The transient distributions of electron number density, positive and negative ion number density, net space charge density, axial electric field, axial potential between electrodes and near cathode sheath were obtained from the numerical model. The computational results show that the electron density in the arc column increases, then decreases, and then stabilizes during the near cathode sheath formation process, and the arc column diameter gradually becomes wider. The 11.14–12.33 V drops along the 17 µm space charge layer away from the cathode (65.5–72.5 kV/m) when the current is verying from 20–80 kA. The homogeneous external magnetic field has little effect on the distribution of particles in the near cathode sheath core, but the electron number density at the near cathode sheath periphery can increase with the magnetic field increasing and the homogeneous external magnetic field will lead to arc diffusion. The validity of the numerical model can be proved by comparison with the experiment.

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Numerical Study on Arc Plasma Behavior During Arc Commutation Process in Direct Current Circuit Breaker

Cited by 28 publications

References 13 publications

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

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

Simulation of arcs for DC relay considering different impacts

Fluid-chemical modeling of the near-cathode sheath formation process in a high current broken in DC air circuit breaker

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