Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Liu, Shaowei; Ma, Hui; Chen, Jinlong; Geng, Yingsan; Wang, Jianhua

doi:10.1049/gtd2.12372

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…Jie Deng and et al studied the performance of the triggered vacuum arc under the TMF-AMF electrode and they pointed out that the vacuum arc maintained a diffused state with rotation on the electrode surface and the arc presented different behaviour under different current levels (5 kA∼20 kA) [6]. The research group of Yingsan Geng and Jianhua Wang put their focuses on the studies of the rotation behaviour of the TMF-based vacuum arcs [7,8] and they furtherly compared the interruption performance of vacuum circuit breaker between TMF-based electrodes and the AMF-based one [9]. They proposed a method to determine the rotation velocity of the constricted vacuum arc which provided the ideas for the subsequent analysis of the present work.…”

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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Evolution and interruption characteristics of DC vacuum arc under Halbach transverse magnetic fields

Liu,

Jin,

Chen

et al. 2024

International Journal of Electrical Power & Energy Systems

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Determination of the critical contact separation length for DC interruption in a vacuum subject to an external transverse magnetic field

Ma,

Liu,

Chen

et al. 2023

Physics of Plasmas

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The objective of this work is to experimentally determine the critical contact separation length Lcritical for DC interruption in vacuum under an external transverse magnetic field (TMF), according the interruption behaviors and vacuum arc characteristics. L is defined as the separation length at the instant of TMF application. Lcritical is the critical and the minimal necessary separation length of the contacts for a successful DC interruption in vacuum. A pair of Helmholtz coils was used to generate the external TMF. A high-speed camera was used to record the vacuum arc appearance. The experimental results quantitatively determine Lcritical for DC vacuum interruption under a certain DC and the external TMF. When the DC ranged from 100 to 500 A under an external TMF of 30 mT, Lcritical ranged from 2.1 to 3.7 mm and did not show linear variation. Second, the extinguishing time of DC vacuum interruption te at various currents significantly increased in a similar pattern under decreasing L in the range of 0.3–1.6 ms. The decrease in L mainly increased the duration of the stable stage and had little apparent influence on the duration of the unstable stage of the DC vacuum arc. Third, the physical mechanism determining Lcritical in DC vacuum interruption under a TMF could be explained from two aspects: the expansion of the vacuum arc column and the diffusion of the metal plasma. In successful DC vacuum interruption, Lcritical should be large enough for the formation and expansion of the “C”-shaped arc column, and enough space should be available for the diffusion of the metal plasma.

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Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Cited by 5 publications

References 43 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

Evolution and interruption characteristics of DC vacuum arc under Halbach transverse magnetic fields

Determination of the critical contact separation length for DC interruption in a vacuum subject to an external transverse magnetic field

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