Surface charge distribution patterns of a truncated cone‐type spacer for high‐voltage direct current gas‐insulated metal‐enclosed transmission line/gas‐insulated metal‐enclosed switchgear

Xue, Jie; Wang, Han; Li, Yanqin; Li, Kefeng; Liu, Xiangyu; Fan, Xiaofeng; Deng, Jian; Zhang, Guanjun; Guo, Bao-Hong

doi:10.1049/iet-smt.2017.0325

Cited by 28 publications

(30 citation statements)

References 29 publications

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“…Then, we can get the surface charge of the core in a steady state, as shown in Equation (14). According to the above simulation results, the gas conductivity along the core surface is about 10 −17 order of magnitude, while the conductivity of RIP material is about 10 −12 order of magnitude, much smaller than the gas conductivity.…”

Section: Discussionmentioning

confidence: 94%

“…Considering the nonlinear gas conductivity of Hexafluoride (SF 6 ), numerical simulation models were created to simulate surface charge accumulation of post insulators and basin insulators [11][12][13]. In addition to those simulation studies, researchers also used manipulating devices (including active and passive probes) to measure the surface charge of the basin insulator and the post insulator [13,14]. However, the RIP wall bushing core is made of RIP material, significantly different from the epoxy/Al 2 O 3 material.…”

Section: Introductionmentioning

confidence: 99%

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Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage

et al. 2019

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As a critical component of a high-voltage direct current (HVDC) transmission system, resin impregnated paper (RIP) wall bushing has become a weak point because of its surface charge accumulation. This paper studies a model RIP wall bushing core designed by the equal capacitance method. The stationary resistive field along the gas-solid interface of the RIP wall bushing core is investigated theoretically by a gas model, which considers the non-linearly field-dependent volume conductivity. The results show that the gas conductivity along the core surface tends to be an arched distribution from the high-voltage conductor to the end shielding screen. The surface charge mainly accumulates at the turning point of the radius, which may threaten the core's insulation. Then, the surface charge is obtained through a measurement system, where the experimental results are highly consistent with the simulation results. Considering the time constant of charge dissipation is nearly 15 min, it would be better to measure the surface charge on one axial direction of RIP wall bushing core after each voltage application. The simulation and experimental results of this paper can guide the design of a RIP wall bushing core.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage

et al. 2019

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“…Since HVDC transmission technology can reduce the power loss of longdistance transmission, it has been widely used in occasions that large-scale power generation using a large amount of renewable energy, such as an offshore HVDC converter platform [1]. Under this circumstance, the application of DC GIS/GIL in the construction of HVDC transmission systems has received extensive attention [2,3]. However, due to the partial discharge and other factors [4], a large number of charges accumulate on the basin-type insulator in GIS/GIL under the HVDC condition, which will distort the electric field on the insulator and reduce its flashover voltage [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…the D p and D n are calculated to 1.21 × 10 −13 cm 2 /s according to the Einstein equation [23]. Under the natural ionisation condition, the ion pair generation rate in SF 6 is 29 IP/(cm 3 •s) [30]. If there is no special explanation, only the influence of voltage polarity reversal on a surface charge under the natural ionisation condition is calculated.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of surface charge and electric field distributions on basin‐type insulator in GIS/GIL due to voltage polarity reversal

et al. 2020

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In this study, a simulation model of surface charge accumulation has been established. The model considers three accumulation ways, i.e. electrical conduction within the gas, through insulator volume and along the insulator surface. The generation, diffusion, drift and recombination of charge carriers are also taken into account. Based on it, the influence of polarity reversal, reversal time on surface charge and electric field distribution on a basin-type insulator are studied. The polarity of the surface charges and the direction of the electric field change after the voltage polarity reversal. When the preload voltage is equal to reversal voltage, the surface charge and the electric field distributions at steady state before and after voltage polarity reversal are all the same with opposite sign, and not affected by the reversal time. However, the time to reach the steady state varies with different reversal time. The steady-state surface charge and electric field increased with the rise of reversal voltage. The transient normal and tangential electric field would not exceed the value of the steady state, which means voltage polarity reversal has no additional influence on insulation performance. This research can provide guidance to the design and manufacture of DC GIS/GIL.

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“…As for the investigations on the surface discharge in insulation materials, Deng et al [10] measured and calculated the residual charge density distribution of the PET film after surface discharge under positive pulse voltage through an electrostatic probe. In 2018, Xue et al [11] studied the charge accumulation and decay characteristics of the modified epoxy resin after surface discharge under DC voltage. They obtained that homogenous charge accumulated near the high‐voltage electrode mainly depended on the role of surface conductance.…”

Section: Introductionmentioning

confidence: 99%

Influence of frequency on the surface discharge characteristics of PEEK under positive repetitive square voltage

Yang

Meng

et al. 2020

High Voltage

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In this study, the surface discharge current pulses of polyetheretherketone (PEEK) material under positive repetitive square voltage in a nitrogen atmosphere are measured. The influences of different voltage amplitudes and frequencies on the detail parameters of forward discharge and backward discharge current pulses are statistically analysed. The results show that as the square voltage amplitude increases, the current pulse amplitude, fall time and pulse width of both forward and backward discharge current increase, and the rise time does not change significantly. As the voltage frequency increases, current pulse amplitude, fall time and pulse width of both forward and backward discharge current decrease, and the rise time does not change significantly. Due to the independence of the discharge at different repetitive cycles, the specific discharge process in one cycle is analysed in detail to explain the influence mechanism of the voltage amplitude and frequency on the discharge current. By mean of the Richardson–Schottky and the Cavallini relaxation model, the relationship between discharge voltage ratio and surface charge, and the decay process of surface discharge are analysed. Furthermore, the influences of amplitude and frequency of the positive repetitive square voltage on the PEEK surface current pulses are explained qualitatively.

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Surface charge distribution patterns of a truncated cone‐type spacer for high‐voltage direct current gas‐insulated metal‐enclosed transmission line/gas‐insulated metal‐enclosed switchgear

Cited by 28 publications

References 29 publications

Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage

Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage

Dynamics of surface charge and electric field distributions on basin‐type insulator in GIS/GIL due to voltage polarity reversal

Influence of frequency on the surface discharge characteristics of PEEK under positive repetitive square voltage

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