Experimental Study of Characteristics of Discharge Shock Waves in High-Repetition-Rate Excimer Lasers

Bin, 刘斌 Liu; Jinbin, 丁金滨 Ding; Kuibo, 王魁波 Wang; Yi, 周翊 Zhou; Rui, 江锐 Jiang; Yu, 王煜 Wang

doi:10.3788/cjl201946.1201001

Cited by 2 publications

(1 citation statement)

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“…The mechanism behind the generation and propagation of shock waves entails alterations in key physical parameters, including gas pressure, temperature, and density [18]. Various techniques, such as interferometric methods [19], optical spectroscopy [20], the Schlieren method [21], and shadowing [22], are commonly employed to investigate these parameters. Among them, the shadowing technique is particularly prevalent due to its simple optical setup and ease of operation.…”

Section: Introductionmentioning

confidence: 99%

Investigating the characteristics of internal discharge shock waves in gas‐insulated switchgear under varied gap configurations

Jia,

Haochu,

Zhao

et al. 2024

IET Generation Trans & Dist

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Gas‐insulated switchgears (GIS) are crucial components of high‐voltage power transmission and distribution systems. Internal discharges within GIS have garnered significant attention in the field of power engineering. This study investigates the characteristics of internal discharge shock waves in GIS under an air pressure of 0.3 MPa and three different discharge gap conditions: 1, 1.5, and 2 mm. High‐speed shadowing techniques are used to analyse the propagation speed, morphology, and post‐wave parameters. The study findings reveal that although the characteristics of internal discharge shock waves in GIS noticeably change with the gap size, they also exhibit a consistent trend: as the gap size increases, the initial shock wave accelerates, intensifying the discharge. Simultaneously, the rate of attenuation rises, with the shock wave becoming weaker after ≈30 µs. Furthermore, the post‐wave parameters follow a similar pattern, with an increase in gap size leading to higher parameter values but also a faster decay rate. The parameters decay more rapidly between 10 and 20 µs, slow down between 20 and 30 µs, and ultimately stabilize after around 30 µs. The results of this study hold significant theoretical and practical implications for the monitoring, diagnosis, and prevention of internal discharges in GIS.

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Section: Introductionmentioning

confidence: 99%