A Novel Vacuum Interrupter Contact Design for Improved High Current Interruption Performance Based on a Double-TMF Arc Control System

Lamara, T.; Hencken, Kai; Gentsch, D.

doi:10.1109/tps.2015.2416517

Cited by 19 publications

(3 citation statements)

References 21 publications

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“…In addition, analysis of the arcing traces has shown that the arc behaviour seems to be strongly affected by the temperature distribution on the contact surface as well. Many other teams have also performed in‐depth research on the operation characteristics of the rotary‐based electrodes for vacuum circuit breakers and it could be concluded that sufficient arc rotation along the electrode edge could reduce the electrode erosion caused by the arc and the interruption performance of the vacuum circuit breaker can be improved using this kind of electrodes [14‐‐18]. Nevertheless, it has to be noted that the existing studies have been carried out on vacuum circuit breakers of which the operating mechanism is quite different compared with the PTGS developed in the present work although the principle of the electrode design is similar.…”

Section: Introductionmentioning

confidence: 99%

Dynamic performance of the plasma‐triggered‐based protective gas switch used in the hybrid UHVDC system

Wang

Gao

et al. 2022

IET Generation Trans & Dist

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Following the design demands of the protective switch used in ±800 kV hybrid UHVDC system, a plasma-triggered-based protective gas switch (PTGS) is developed by performing the comparative study of its dynamic performance by considering the arc dynamic behaviour induced by the transverse magnetic field (TMF)-based electrode used in the PTGS. The PTGS-based electrode, as the core component, is designed with a helicalslotted structure, the TMF could drive the arc between moving from the electrode centre to the electrode edge and then rotate rapidly along the edge. A 3D magnetohydrodynamic model (MHD) was established to computationally evaluate the effects of electrode structure variation on arc rotation characteristics. The model was verified by comparing the calculation results with experiments performed on the designed PTGS prototype. A comprehensive evaluation approach was also proposed to support the comparative analysis of the arc dynamic behaviour and estimate the arc-controlling capability of the designed electrode to further assess the dynamic performance of the designed PTGS. This approach could quantitatively estimate the arc behaviour from a spatial scale, the variation of characterised parameters such as temperature associated with arc behaviour is concerned as well, which reasonably supports the electrode optimum design and the PTGS.

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Section: Introductionmentioning

confidence: 99%

Dynamic performance of the plasma‐triggered‐based protective gas switch used in the hybrid UHVDC system

Wang

Gao

et al. 2022

IET Generation Trans & Dist

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show abstract

“…In the pioneering works [4][5][6], the two different contact shapes were suggested. Corresponding principles are used in the modern contact systems in vacuum interrupters and give inspiration for improved contact geometries [7]. The choice of contact design depends on the electrical and thermal load in a certain application.…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, the influence of the arc ignition position on local surface temperature of the anode and vapor density after current zero crossing was investigated in a model vacuum interrupter using the above-mentioned optical diagnostics under realistic operation conditions. Figure 1 presents the experimental setup, comprising a model vacuum interrupter (vacuum chamber 1 with pneumatic drive 2), a high-current generator (visible in the background of Figure 1), as well as electrical and optical diagnostics (3)(4)(5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%

Properties of Vacuum Arcs Generated by Switching RMF Contacts at Different Ignition Positions

et al. 2020

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The influence of initiation behavior of the drawn arc on the arc motion, on arc characteristics during the active phase, as well as on the post-arc parameters, was studied. The study was focused on arc dynamics, determination of the anode surface temperature after current interruption, and diagnostics of metal vapor density after current zero crossing. Different optical diagnostics, namely high-speed camera video enhanced by narrow-band optical filters, near infrared spectroscopy, and optical absorption spectroscopy was applied. The initiation behavior of the drawn arc had a clear influence on arc parameters. Higher local electrode temperature occurs in case of the electrodes with ignition point near the outer electrode boundary. This further causes an enhanced density of chromium vapor, even in cases with lower arc duration. The results of this study are important for design development of switching RMF contacts for future green energy applications.

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Vacuum arc characteristics of an AMF–TMF composite contact with fixed AMF contacts under different opening velocities

Wang

et al. 2022

AIP Advances

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The objective of this paper is to determine the vacuum arc characteristics of a novel axial magnetic field (AMF)–transverse magnetic field (TMF) composite contact under different opening velocities. The AMF–TMF composite contact consists of a pair of outer fixed AMF contacts and a pair of inner movable TMF contacts. Drawn arc experiments were carried out in an L– C discharging circuit with this composite contact system to observe the differences in the arc development process under different opening velocities. The opening velocity of the inner movable contact was set to 1.3, 1.8, and 2.3 m/s. The arc current was up to 20 kA rms. In the experiments, the arc behavior was recorded using a high-speed camera. The arc current of each contact and the arc voltage were measured. Then the arc characteristics, including the arc current transfer characteristics, diffused arc duration, and mental droplet distribution before zero current, were quantitatively analyzed. Furthermore, magnetic field calculation was carried out to explain why the arc characteristics are different under different opening velocities. Experimental results show that with an increase in the opening velocity from 1.3 to 2.3 m/s, the diffused arc duration before zero current increases from 1.05 to 1.75 ms when the cathode is on the fixed side and increases from 1.30 to 1.90 ms when the anode is on the fixed side. In addition, the quantity of mental droplets between contacts before zero current is less with high opening velocity. It indicates stronger short-current breaking capacity under higher opening velocity. From the simulation results, it can be seen that during the arcing period, more current transfers to the fixed AMF contact under higher opening velocity and generates a stronger AMF. It could explain the earlier diffusion of the vacuum arc column under higher opening velocity.

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A Novel Vacuum Interrupter Contact Design for Improved High Current Interruption Performance Based on a Double-TMF Arc Control System

Cited by 19 publications

References 21 publications

Dynamic performance of the plasma‐triggered‐based protective gas switch used in the hybrid UHVDC system

Dynamic performance of the plasma‐triggered‐based protective gas switch used in the hybrid UHVDC system

Properties of Vacuum Arcs Generated by Switching RMF Contacts at Different Ignition Positions

Vacuum arc characteristics of an AMF–TMF composite contact with fixed AMF contacts under different opening velocities

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