Particle-Initiated Breakdown Characteristics of Conical Insulator in N2 GAS and N2/02 Mixture under DC Voltage

Hara, M.; Adachi, K.; Tobata, Hitoshi; Akazaki, Masanori; Mao, Fei

doi:10.1109/tei.1987.298971

Cited by 23 publications

(6 citation statements)

References 7 publications

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“…There is a transient process when the particles are charged on the surface of coated electrodes, thus obtaining the relaxation response of particles [20]. The charging properties and particle behaviors in DC [21,22] and AC [23,24] electric fields were studied without considering the discharge effect between particle and electrode during their collision. Particle motions are charged near the electrode, influenced by discharge [25][26][27], characteristics of gas [28,29], and space charge [30][31][32].…”

Section: Section Headingmentioning

confidence: 99%

Particle trajectories and its charging behaviors: effect of gas type and electric field

et al. 2020

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Conductive particles in the gas insulated transmission lines (GIL) induce the breakdown between electrodes or the flashover along insulators. To solve the problem of particle moving and realize the particle-moving regulation, particle trajectories should firstly be determined in air and SF6. This paper presents the results of particle trajectories and its charging behaviors at vacuum and SF6, respectively. Metal particles with different materials and sizes were introduced and the charge quantity was calculated. The results showed that the particle lift-off electric field in SF6 was higher than that in air under the same gas pressure, that is, the charge on particle in SF6 was about 0.789 times lower than that in air under the same condition. Besides, the lift-off electric field of particle increased with the pressure increase of SF6. The charge on particle was affected by the concentration of electric field near particle and the electrical negative features of SF6. The work provided the data support for development of DC GIL in particle defect suppression.

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Section: Section Headingmentioning

confidence: 99%

Particle trajectories and its charging behaviors: effect of gas type and electric field

et al. 2020

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“…However, the conducting protrusion contaminations in gas-insulated equipment can remarkably damage the robustness of the insulation. In order to ameliorate the dependability of the GIS, many studies have been produced, presuming the particle motion behavior, as well as particle-activated breakdown attributes in various gas gaps, with and without spacers, under several administered voltage wave shapes [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The Estimation of Lightning Impulses Superimposed onto Pre-Stressed DC Breakdown Voltages Using the Leader Propagation Method

et al. 2022

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The impulse breakdown attributes are of rudimentary importance in the insulation coordination in the gas-insulated switchgear (GIS). The critical voltage waveshape for the insulation is the surge over voltages. Usually, such over-voltages will emerge on the electrical equipment while these are burdened under DC or AC working voltages. Therefore, during relatively small-time intervals, the undermined devices are exposed to surge voltages that are superimposed upon the already running DC or AC voltages. From a safety point of view, and for providing reliable power to the consumer, we need to study the breakdown characteristics under such over-voltages, with reference to normal operating voltages (DC or AC). The breakdown mechanism of the GIS under compressed SF6 gas is known to be controlled by a stepped leader propagation method. Although different experimental studies have been conducted by many researchers for different experimental conditions under DC, AC, or impulse high voltages alone, not much research has been performed, in a systematic way, to model and estimate the breakdown voltages of the GIS under such superimposed conditions. This paper presents a systematic model, using a leader propagation technique for the estimation of breakdown voltages for complex voltage conditions, i.e., a lightning impulse (LI) superimposed on pre-stressed DC for different experimental conditions. The estimated values are in good agreement with the measured experimental results.

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“…It obstacles for the development of GIS. In order to eliminate the metal particles in GIS, particle capture traps are usually designed in the production with the withstand voltage test before its operation, which enables particles to move to the trap [1][2][3][4][5][6][7][8][9]. In order to optimise particle traps and apply withstand tests, there are many researches on particle movement characteristics [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

Sun

Chen

et al. 2019

High Voltage

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Metal particles, difficult to be eliminated in gas-insulated metal-enclosed switchgear (GIS), can cause GIS discharge and breakdown between electrodes, or flashover on the insulator surface. It influences the development of ultra-high voltage (UHV) projects. Therefore, the work optimised the model of metal particle movement under AC voltage, studying the metal particle movement and distribution characteristics between ball-plane electrodes through experiment and simulation. Under AC voltage, the particle jumps on a small scale on the plane surface. With the increase of voltage, the jump amplitude increases. However, the collision frequency decreases until the particle collides with the ball electrode. When the initial phase angle of power changes, the particle-moving pattern is symmetrical in the angle ranging from 0 to 180°, and from 180 to 360°. The collision frequency changes slightly with the increase of jump amplitude when the angel ranges from 0 to 120°.

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Particle-Initiated Breakdown Characteristics of Conical Insulator in N2 GAS and N2/02 Mixture under DC Voltage

Cited by 23 publications

References 7 publications

Particle trajectories and its charging behaviors: effect of gas type and electric field

Particle trajectories and its charging behaviors: effect of gas type and electric field

The Estimation of Lightning Impulses Superimposed onto Pre-Stressed DC Breakdown Voltages Using the Leader Propagation Method

Metal particle movement and distribution characteristics under AC voltage and ball‐plane electrodes

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