Progression of positive corona on cylindrical insulating surfaces. I. Influence of dielectric material

Tan, B.; Allen, N.L.; Rodrigo, H.

doi:10.1109/tdei.2007.302878

Cited by 24 publications

(19 citation statements)

References 7 publications

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“…Specially, the electric field required for stable streamer propagation along ceramic is lower, because the charge is rarely accumulated on the surface of ceramic [40]. Consequently, the influence of the weakening of electric fields in the second half part of the gap for the negative surface charge and surface attachment of positive charge in the streamer along ceramic is much less.…”

Section: Influence Of Materials Property Onmentioning

confidence: 99%

Characteristics of streamer propagation along the insulation surface: influence of dielectric material

Meng

Mei

Changlong

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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Research on dynamics of streamer propagation along different dielectric materials under a uniform electric field is presented. In the three-electrode arrangement, the variation of the streamer propagation probability, velocity and light intensity with electric field in the air and along the different dielectric materials was measured through three photomultipliers. The photographs of the streamer propagation in the air and along the different dielectric materials were taken with an ultraviolet camera. The test results have shown that the electric field required for streamer propagation in air alone is less than along the insulation surface. Furthermore, for electric fields higher than streamer 'stability' propagation fields, the streamer propagates along insulation surface with a 'fast' and a 'slow' component. However, the streamer propagates in air alone without a 'fast' component, only with a 'slow' component. The velocity of the streamer propagating in air alone is significantly less than the velocity of the 'fast' component, and is higher than the velocity of the 'slow' component. The streamer 'stability' propagation field and velocity depend upon the nature of the dielectric material. Specifically, higher electric fields are required for streamers to propagate along a dielectric material with larger permittivity. The velocity of streamer propagation along the dielectric material is also affected by attachment of charge to the surface and photoemission of secondary electrons from the surface so much. Consequently, under the same electric field, the relationship between streamer propagation velocity and permittivity of dielectric material is not very evident, roughly inverse proportion.Index Terms -Streamer propagation, dielectric material, three-electrode arrangement, streamer propagation electric field, streamer propagation velocity, streamer propagation light intensity.

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Section: Influence Of Materials Property Onmentioning

confidence: 99%

Characteristics of streamer propagation along the insulation surface: influence of dielectric material

Meng

Mei

Changlong

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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“…To study the influence of the confinement of the discharge by the capillary tube, a first important point is the distance between the dielectric surface and the point of initiation of the discharge. Indeed, Allen et al [Allen and Mikropoulos, 1999;Tan et al, 2007] showed that, close to dielectric surfaces, discharges in air usually propagate in two modes: a fast component over the dielectric surface and a slow one in ambient air. It is important to note that in all these studies, the discharge is generated in a point-to-plane geometry and the dielectric is a plane or a cylinder set on one side of the discharge.…”

Section: Introductionmentioning

confidence: 99%

“…These authors also concluded that the discharge propagates faster over the dielectric surface than through the gas. It is important to note that in both studies the electrodes were in contact [Allen and Mikropoulos, 1999] or at a few millimeters from the dielectric surface [Tan et al, 2007;Sobota et al, 2009]. In this work, we propose to study discharge initiation and propagation in capillary tubes and therefore to study the influence of a cylindrical constraint on the discharge.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the discharge propagation in a capillary tube in air at atmospheric pressure

Jánský¹,

Tholin²,

Bonaventura³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. This paper presents simulations of an air plasma discharge at atmospheric pressure initiated by a needle anode set inside a dielectric capillary tube. We have studied the influence of the tube inner radius and its relative permittivity ε r on the discharge structure and dynamics. As a reference, we have used a relative permittivity ε r = 1 to study only the influence of the cylindrical constraint of the tube on the discharge. For a tube radius of 100 µm and ε r = 1, we have shown that the discharge fills the tube during its propagation and is rather homogeneous behind the discharge front. When the radius of the tube is in the range 300 to 600 µm, the discharge structure is tubular with peak values of electric field and electron density close to the dielectric surface. When the radius of the tube is larger than 700 µm, the tube has no influence on the discharge which propagates axially. For a tube radius of 100 µm, when ε r increases from 1 to 10, the discharge structure becomes tubular. We have noted that the velocity of propagation of the discharge in the tube increases when the front is more homogeneous and then, the discharge velocity increases with the decrease of the tube radius and ε r . Then, we have compared the relative influence of the value of tube radius and ε r on the discharge characteristics. Our simulations indicate that the geometrical constraint of the cylindrical tube has more influence than the value of ε r on the discharge structure and dynamics. Finally, we have studied the influence of photoemission processes on the discharge structure by varying the photoemission coefficient. As expected, we have shown that photoemission, as it increases the number of secondary electrons close to the dielectric surface, promotes the tubular structure of the discharge.

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“…Because there is no ferromagnetic resonance problem in ECVT, this paper focuses on analyzing its transient response characteristics as illustrated emphatically [34,35]. The primary side to ground short circuit and the reclosing with trapped charge are analyzed respectively.…”

Section: Simulation Analysis Of Transient Characteristicsmentioning

confidence: 99%

Research on Characteristics of ECVT for Power Quality Detection and Optimum Design of Its Parameter

Liu

Zeng

et al. 2019

Energies

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Electronic Capacitive Voltage Transformer (ECVT), connecting the transmission system and measuring device, is the key equipment of digital substation in the distribution network. Its frequency characteristics and the rapid transient response performance exert decisive effects on whether it is in keeping with the power quality requirements for wide frequency domain and high precision detection. Many detection methods that require special testing equipment have limitations of high-cost and complexity in project implementation. We establish the mathematical model of ECVT, which is utilized to study its integrative characteristics based on the definitions of frequency response and transient voltage error. Besides, the harmonic and transient disturbance detection performances are analyzed comprehensively with the model by simulation. Then, we propose a multi-objective parameter optimization design model with minimization of transient voltage decay duration, maximization of frequency bandwidth and minimization of transient impulse voltage, which is solved through the entropy weighting method and genetic algorithm. The analysis and optimization results indicate that selecting resistor divider through the proposed method can achieve data transmission results with acceptable accuracy. Further, its superior performance on transforming transient disturbances conforms to the distribution network’s electric energy quality requirements.

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Progression of positive corona on cylindrical insulating surfaces. I. Influence of dielectric material

Cited by 24 publications

References 7 publications

Characteristics of streamer propagation along the insulation surface: influence of dielectric material

Characteristics of streamer propagation along the insulation surface: influence of dielectric material

Simulation of the discharge propagation in a capillary tube in air at atmospheric pressure

Research on Characteristics of ECVT for Power Quality Detection and Optimum Design of Its Parameter

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