Numerical Analysis and Experiment of Floating Conductive Particle Motion Due to Contact Charging in High-Voltage System

Lee, Kang Hyouk; Baek, Minki; Hong, Seung Geon; Kim, Young Sun; Choi, Heung Sik; Park, Il Han

doi:10.1109/tmag.2015.2496286

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…The discharge power is directly proportional to the discharge magnitude and corresponding applied voltage. At a given voltage, the size and shape of the particle affect the electric force [20], which are obvious to influence the discharge power. In other words, the discharge power caused due to finesized particles is higher compared with medium-sized and largesized particles at lower applied voltage with same experimental setup.…”

Section: Discharge Powermentioning

confidence: 99%

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Effect of irregular‐shaped Cu particles on transformer oil PD characteristics under varying electrode configurations

Rahman

Nirgude

Burjupati

2019

IET Science, Measurement & Technology

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Electric field distribution depends on the geometry of internal parts of a transformer, which may experience as uniform, quasi-uniform and non-uniform fields. In the vicinity of these fields, particles present in transformer oil undergo various field stresses, especially in case of conducting particles. Any variation in local field stress causes relative change in partial discharge (PD) characteristics. Mineral oil in transformer may contain particles having different sizes, shapes and numbers. The irregular shape of particles can cause serious effects than smooth spherical particle. This study investigates the effect of irregular-shaped copper (Cu) particles in transformer oil PD characteristics under varying electric field. Furthermore, to study the effect of particle size, large-, medium-and fine-sized irregular-shaped Cu particles were used. Phase-resolved PD (PRPD) pattern, PD characteristics such as magnitude, number, discharge power, rise and duration time were analysed. The observed PRPD patterns were comparatively similar regardless of applied electric fields and particle size. The experiential PD characteristics are observed to depend on electrode configuration, particle size and applied voltages. The measured discharge power indicated that fine-sized particles required minimum applied voltage to dissipate sufficient discharge power in oil compared with medium-and large-sized particles.

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Section: Discharge Powermentioning

confidence: 99%

Section: Discharge Powermentioning

confidence: 99%

Effect of irregular‐shaped Cu particles on transformer oil PD characteristics under varying electrode configurations

Rahman

Nirgude

Burjupati

2019

IET Science, Measurement & Technology

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“…The motion of metal particles in the GIL/GIS cavity is similar to Brownian motion, with a substantial degree of freedom and randomness. As a result, it is almost impossible to illustrate by feature vectors deterministically [ 18 , 19 ]. However, this motion can be regarded as an atypical fractal model due to self-similarity and long-range correlation characteristics.…”

Section: Introductionmentioning

confidence: 99%

A Fault Diagnosis Scheme Using Hurst Exponent for Metal Particle Faults in GIL/GIS

Duan

Yan

et al. 2022

Sensors

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A diagnosis scheme using the Hurst exponent for metal particle faults in GIL/GIS is proposed to improve the accuracy of classification and identification. First, the diagnosis source signal is the vibration signal generated by the collision of metal particles in the electric field. Then, the signal is processed via variational mode decomposition (VMD) based on particle swarm optimization with adaptive parameter adjustment (APA-PSO). In the end, fault types are classified and identified by an SVM model, whose feature vector is composed of the Hurst exponents of each intrinsic mode function (IMF-H). Extensive experimental data verify the effect of this new scheme. The results exhibit that the classification performance of SVM is significantly improved by the new feature vector. Furthermore, the VMD based on APA-PSO with adaptive parameter adjustment can effectively enhance the decomposition quality.

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“…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]. In reference [10,12], a wedge of electrode structure was established after analysing the electric field among insulator, electrodes, and gas in GIS.…”

Section: Introductionmentioning

confidence: 99%

“…In order to optimise particle traps and apply withstand tests, there are many researches on particle movement characteristics [10–26]. In reference [10, 12], a wedge of electrode structure was established after analysing the electric field among insulator, electrodes, and gas in GIS.…”

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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Numerical Analysis and Experiment of Floating Conductive Particle Motion Due to Contact Charging in High-Voltage System

Cited by 6 publications

References 10 publications

Effect of irregular‐shaped Cu particles on transformer oil PD characteristics under varying electrode configurations

Effect of irregular‐shaped Cu particles on transformer oil PD characteristics under varying electrode configurations

A Fault Diagnosis Scheme Using Hurst Exponent for Metal Particle Faults in GIL/GIS

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

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