Study on the Path and Thermal Characteristics of the Spark Discharge Between Ice and Electrode Gap

Meng, Wei; Hu, Jianlin; Zhang, Ruihe; Jiang, Xingliang; Sun, Keer

doi:10.1109/tdei.2023.3243617

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…It does not depend on the self-illumination of the flow field to be measured. Considering the cost and complexity of experiment, the refractive index of plasma is mostly measured at a single wavelength, and the plasma temperature and particle density are obtained based on LTE [23][24][25]. For MV AC air arcs, it is difficult to apply the above plasma diagnostic techniques.…”

Section: Introductionmentioning

confidence: 99%

Measurement of medium-voltage AC air arc temperature and particle number density based on dual-wavelength Moiré deflection technology

Zhou,

Yang,

Yuan

et al. 2024

J. Phys. D: Appl. Phys.

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AC air arcs are generated in medium-voltage (MV) power systems under the effect of harsh weather conditions, equipment aging, and high penetration of distributed generation, threatening equipment and public safety. The arc current and temperature are low due to the wide application of arc suppression devices. In this scenario, the MV AC air arc does not satisfy the local thermodynamic equilibrium (LTE) condition. In addition, the repeated arcing and extinguishing processes further complicate the arc discharge mechanism, which bring challenges in the modeling and detection of MV AC air arcs. Experimental methods are a direct and efficient approach to determine the properties of arc plasmas. In this study, a dual-wavelength moiré deflection diagnostic system was established to determine the time evolution of the particle density and radial distribution of the temperature in an MV AC air arc without relying on the LTE assumption. The electron number density and heavy particle number density change transiently during the arc discharge process and change gradient along the radial direction. The heavy particle temperature and electron temperature were then calculated based on the measured particle number density. During the arcing stage, the temperature of the electrons exceeded that of the heavy particles significantly, and the arc deviated from LTE. Finally, the limitations of the traditional single-wavelength moiré deflection method are analyzed. The classic single-wavelength moiré deflection method, while capable of estimating heavy particle temperature in plasma, exhibits a significant error in electron density estimation compared to the dual-wavelength moiré deflection method.

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Section: Introductionmentioning

confidence: 99%

Measurement of medium-voltage AC air arc temperature and particle number density based on dual-wavelength Moiré deflection technology

Zhou,

Yang,

Yuan

et al. 2024

J. Phys. D: Appl. Phys.

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Magnetohydrodynamic simulation and test of compression arc-extinguishing device under icing condition

Huang,

Xu,

Qin

et al. 2024

AIP Advances

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When the weather is cold and wet, the insulator and the transmission line components often undergo icing. In order to study the inhibition effect of the compression arc-extinguishing device with icing on the recovery of arc plasma conductivity and air disruptive strength, this paper will verify it through simulation and test. In the simulation part, a two-dimensional geometric model is established, and the magnetohydrodynamic equation group is used as the control equation group. The breakdown characteristics of the device with and without icing are compared, and the dynamic characteristics of the arc are studied in terms of temperature and conductivity. The results show that the temperature of the arc plasma can be reduced to 3000 K within 1 ms, and the conductivity can be reduced to 0 within 250 µs. In the test part, the suppression effect on arc current amplitude after the device with icing is subjected to high current impact is verified, and the coupling triggering method of impulse voltage and power frequency voltage is adopted to further verify the arc extinguishing condition of the device when the power frequency current continues. The results show that the amplitude of the arc produced by high current impulse decreases from 67 to 35 kA and to 0 within 1 ms after passing through the device with icing, and the current amplitude can still drop to 0 at 2.5 ms after adding the power frequency voltage. It is proved that the device with icing can inhibit the recovery of arc plasma conductivity and air disruptive strength.

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Study on the Pressure Field Reconstruction Method and Its Relationship With Audible Noise of DC Corona Discharge

Wei,

Li,

et al. 2023

IEEE Access

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Study on the Path and Thermal Characteristics of the Spark Discharge Between Ice and Electrode Gap

Cited by 4 publications

References 28 publications

Measurement of medium-voltage AC air arc temperature and particle number density based on dual-wavelength Moiré deflection technology

Measurement of medium-voltage AC air arc temperature and particle number density based on dual-wavelength Moiré deflection technology

Magnetohydrodynamic simulation and test of compression arc-extinguishing device under icing condition

Study on the Pressure Field Reconstruction Method and Its Relationship With Audible Noise of DC Corona Discharge

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