Laser Triggering of Spark Gap Switches

Larsson, Anders; Yap, Danny; Au, Juliana; Carlsson, Tomas

doi:10.1109/tps.2013.2297161

Cited by 13 publications

(2 citation statements)

References 34 publications

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“…Spark gap possesses several distinguishable features, such as low cost, simple mechanical structure, extremely wide range of withstanding voltage and current, which make it the most popular switches in various situations [1][2][3][4][5]. In electric power system, specifically, spark gap is applied as the over voltage protector for the series compensation system and keeps the system from being destroyed by the operating over voltage [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the limited triggering energy of the trigger pulse results in the lack of the charged particles ejected in the spark gap. Thus, the working coefficient (the ratio of the charging voltage to the self-breakdown voltage) of the spark gap is generally larger than 50%, normally 70% [1,5,14,15]. In actual operation, there may be situation that the breakdown of the spark gap is required even when the working voltage is extremely low.…”

Section: Introductionmentioning

confidence: 99%

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Study on a New Ignition Method of the Spark Gap Based on Plasma Ejection in Air

Huang

Yang

Huo³

et al. 2016

Contrib. Plasma Phys.

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A new ignition method of the spark gap based on plasma ejection is proposed in this paper, as the conventional trigatron spark gap performs poorly under the low working coefficient (the ratio of the charging voltage to the self‐breakdown voltage) in air. The plasma is generated by the capillary discharge, which has high pressure, high temperature and high velocity. The capillary discharge device is placed inside the low voltage electrode. As long as the triggering signal is sent to the device, a column of the plasma flow is ejected in axial direction and develops rapidly towards the high voltage electrode. Subsequently, the gap is broken down and a high resistive channel is formed, where the thermal ionization takes place and the arc across the whole gap is generated and develops into a well conductive channel. The process of the thermal ionization of the high resistive channel varies with the change of the spark gap distance. The breakdown delay and the delay jitter of the spark gap increase with the spark gap distance, as both parameters are mainly determined by the developing process of the plasma ejection. The characteristics of the plasma flow determine the possibility of the breakdown of the spark gap under the low working coefficient. The ignition method based on capillary plasma ejection has been proved by the preliminary experiments, which indicate that under the gap length of 8 cm and the working coefficient of less than 3%, the effective ignition is still achievable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on a New Ignition Method of the Spark Gap Based on Plasma Ejection in Air

Huang

Yang

Huo³

et al. 2016

Contrib. Plasma Phys.

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Precise triggering of electrical discharges by ultraviolet laser radiation for the investigation of ignition processes

Essmann

Spörhase

Großhans

et al. 2018

Journal of Electrostatics

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Closing performances of double‐gap laser‐triggered vacuum switch

et al. 2020

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To develop high-voltage-pulsed power switches with better performances, a multi-gap laser-triggered vacuum switch is proposed in this study. Based on established test prototype for double-gap laser-triggered vacuum switch, closing processes of double-gap laser-triggered vacuum switch are discussed combined with laser-produced plasma. Closing performances of double-gap laser-triggered vacuum switch under different gap polarity configurations, operating voltages, laser energies and laser split ratios are investigated. Closing time delay characteristics of double-gap laser-triggered vacuum switch and single-gap laser-triggered vacuum switch are compared later. The test results prove that, affected by the imbalanced developed initial plasma between gaps, double-gap laser-triggered vacuum switch with two positive gaps and 1:1 laser split ratio presents best closing performances than other switches. With the rise of laser energy, closing delay time and jitter time of double-gap laser-triggered vacuum switch both decrease, while the influences from increasing voltages are weak. Closing delay time of P-P type double-gap laser-triggered vacuum switch can be controlled within 103 � 1.5 ns under 90 mJ laser energy, and it is about 10 ns longer than single-gap laser-triggered vacuum switch. For some direct current applications with changing voltage directions, P-N type double-gap laser-triggered vacuum switch with 1:1 laser split ratio shows more stable closing performances. In addition, closing performances of double-gap laser-triggered vacuum switch can be further improved by optimizing the developments of initial plasma in series gaps. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Laser Triggering of Spark Gap Switches

Cited by 13 publications

References 34 publications

Study on a New Ignition Method of the Spark Gap Based on Plasma Ejection in Air

Study on a New Ignition Method of the Spark Gap Based on Plasma Ejection in Air

Precise triggering of electrical discharges by ultraviolet laser radiation for the investigation of ignition processes

Closing performances of double‐gap laser‐triggered vacuum switch

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