Repetitive Gas-Discharge Closing Switches for Pulsed Power Applications

Li, Longjie; Zhao, Zheng; Wang, Kun; Li, Chenjie; Ren, Jiarui; Li, Jiangtao

doi:10.1109/tps.2019.2933660

Cited by 36 publications

(7 citation statements)

References 63 publications

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“…Spark-gap switches exist in many different configurations, but all rely on a conducting channel being formed in an electrode system [23,24]. In its simplest form, a spark gap consists of two opposing electrodes placed in a gas (or liquid) medium.…”

Section: General Concept Of Nanosecond Pulse Sourcesmentioning

confidence: 99%

Nanosecond pulsed streamer discharges Part I: Generation, source-plasma interaction and energy-efficiency optimization

Huiskamp

2020

Plasma Sources Sci. Technol.

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Streamer discharges generated by nanosecond high-voltage pulses have gained attraction for a variety of reasons, but mainly because they are very efficient for a number of plasma-processing applications. More specifically, researchers have noted that the pulse duration and the rise time of the applied high-voltage pulse have a significant influence on the radical yield of the transient plasmas generated with these pulses; shorter pulses result in higher yields. With the need to study transient plasmas generated by these short pulses comes the need to understand how to generate those pulses and to understand the interaction between the pulse source and the discharge. In this topical review, we will explore the different methods with which to generate nanosecond highvoltage pulses, how the interaction between the pulse source and the discharge may influence the source and the discharge and how to optimize the energy transfer from the pulse source to the discharge.

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Section: General Concept Of Nanosecond Pulse Sourcesmentioning

confidence: 99%

Nanosecond pulsed streamer discharges Part I: Generation, source-plasma interaction and energy-efficiency optimization

Huiskamp

2020

Plasma Sources Sci. Technol.

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“…This phenomenon has been reported in investigations of gas switches with uniform fields. The intermediate plateau found in the insulation recovery process is thought to be due to a transient increase in the negative ion population, which produces a large number of initial electrons by detachment collision, in the electrode gap [13]. The appearance of the plateau will seriously extend the insulation recovery time.…”

Section: A Insulation Recovery Curvementioning

confidence: 99%

“…Previous research has revealed that gas switches can be roughly divided into high-pressure and low-pressure switches according to their working pressure range. This classification is related to Paschen's curve [9]- [13].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Electric Field Inhomogeneity on Repetitive Performance of a Corona-Stabilized Switch

Huang

Yang

2020

IEEE Access

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The corona-stabilized switch has a great potential in pulsed power systems where high pulse repetition frequencies are required. Corona discharge in SF 6 in highly inhomogeneous electric field is utilized to improve repetitive performance of this kind of switch. To clarify how the repetitive performance (insulation recovery and repetitive breakdown stability) of the switch depends on the field inhomogeneity, the insulation recovery and repetitive breakdown stability of a corona-stabilized switch are experimentally investigated and theoretically analyzed. An innovative double-pulse method combining breakdown voltage and discharge channel images is used to measure the insulation recovery of the switch. For different electrodes, their voltage jitters at pulse repetition frequencies of 1-2000 Hz are measured to illustrate the stability of repetitive breakdown. The experimental results are theoretically analyzed from the memory effect and behavior characteristics of the residual plasma, the critical volume and its dynamic characteristics. The results reveal the corona stabilization enhancement effect during the repetitive breakdown in SF 6 in extremely inhomogeneous field. The influence of electrode profile on the propagation of discharge channel shock wave, the decay of residual plasma and the recovery of neutral gas density are clarified. Effect of the electrostatic conditions, including the critical volume and its dynamic characteristics, and the intensity of corona discharge, on the repetitive performance of the switch are also clarified. INDEX TERMS Corona stabilization, electric field inhomogeneity, gas discharge devices, insulation recovery, memory effect.

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“…For example, the pulse power switch is very important in pulse fracturing technology, and the characteristics and performance of the pulse power switch directly affect the efficiency of pulse power discharge and the reservoir fracturing effect. The gas spark switch was the most widely used [18] due to its simple structure and high-power breakdown capability, though it has the disadvantages of low repetition rate and serious switch corrosion. Scholars solve its weakness by improving the recovery rate of hold-off voltage through adding airflow between electrodes [19], decreasing electrode space [20], injecting different gases between electrodes [21,22] and changing switch geometry structure [23].…”

Section: Introductionmentioning

confidence: 99%

Improvement of circuit oscillation generated by underwater high voltage pulse discharges based on pulse power thyristor

Yu¹,

Kang²

2023

Plasma Sci. Technol.

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High voltage fracturing technology was widely used in the field of reservoir reconstruction due to its advantages of being clean, pollution-free, and high-efficiency. However, high-frequency circuit oscillation occurs during the underwater high voltage pulse discharge process, which brings security risks to the stability of the pulse fracturing system. In order to solve this problem, an underwater pulse power discharge system was established, the circuit oscillation generation conditions were analyzed and the circuit oscillation suppression method was proposed. Firstly, the system structure was introduced and the charging model of the energy storage capacitor was established by the state space average method. Next, the electrode high-voltage breakdown model was established through COMSOL software, the electrode breakdown process was analyzed according to the electron density distribution image, and the plasma channel impedance was estimated based on the conductivity simulation results. Then the underwater pulse power discharge process and the circuit oscillation generation condition were analyzed, and the circuit oscillation suppression strategy of using the thyristor to replace the gas spark switch was proposed. Finally, laboratory experiments were carried out to verify the precision of the theoretical model and the suppression effect of circuit oscillation. The experimental results show that the voltage variation of the energy storage capacitor, the impedance change of the pulse power discharge process, and the equivalent circuit in each discharge stage were consistent with the theoretical model. The proposed oscillation suppression strategy can not only prevent the damage caused by circuit oscillation but also reduce the damping oscillation time by 77.1%, which can greatly improve the stability of the system. This research has potential application value in the field of underwater pulse power discharge for reservoir reconstruction.

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Repetitive Gas-Discharge Closing Switches for Pulsed Power Applications

Cited by 36 publications

References 63 publications

Nanosecond pulsed streamer discharges Part I: Generation, source-plasma interaction and energy-efficiency optimization

Nanosecond pulsed streamer discharges Part I: Generation, source-plasma interaction and energy-efficiency optimization

The Influence of Electric Field Inhomogeneity on Repetitive Performance of a Corona-Stabilized Switch

Improvement of circuit oscillation generated by underwater high voltage pulse discharges based on pulse power thyristor

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