Effect of AC and switching impulse superimposed voltage on PD characteristics in SF<sub>6</sub> gas

He, Cong; Zhang, Liang; Li, Junhao; Zhang, Qian; Yao, Xin

doi:10.1109/tdei.2019.007986

Cited by 10 publications

(2 citation statements)

References 17 publications

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“…In contrast, a few characteristics of PD in the gas-insulated system have been carried out. PD characteristics on the epoxy surface under AC voltage superimposed with impulse have been studied [25,26]. Less work around the surface PDs under superimposed voltage of DC and impulse have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Wang

Guo

et al. 2021

High Voltage

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The presence of lightning impulses (LIs) on the DC waveform can seriously influence the insulation performance of a GIL system. The waveshape can be a superposition of the DC and impulse waveform. In this study, the behaviour of partial discharge (PD) on an epoxy surface is investigated under DC and LI superimposed voltage in SF 6 . The lightning impulses with different polarities are superimposed on the epoxy surface under both positive and negative DC voltages, respectively. Positive lightning impulses are superimposed on a negative DC voltage with a 90% of the partial discharge inception voltage (PDIV) magnitude. The number and amplitude of the PDs are used to evaluate the insulation performance. The experimental results show that the LI with a different polarity applied to DC can excite the PDs on the epoxy surface. The excitation effect of positive LI superimposed on negative DC is more significant. According to the impulse amplitude and PD characteristics, the influence of superimposed LI on PD excitation can be divided into three stages. As the superimposed LI increases, the amplitude of the excited PD increases gradually, while the PD number first increases and then decreases. This study is expected to provide reference for manufacture and protection of power equipment.

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Section: Introductionmentioning

confidence: 99%

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Wang

Guo

et al. 2021

High Voltage

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“…The Gas Insulated Busduct (GIB) is common because of its compactness, high reliability, low footprint, environmentally friendly and rapid growth in energy consumption and urbanization [1]. To meet the high electric demand, a three-phase GIB needs to emerge for practical implementation.…”

Section: Introductionmentioning

confidence: 99%

Electric Field Stress in a Three Phase Common Enclosure Gas Insulated Busduct with FGM Post Type Spacer and Reduction with Metal Inserts

Sobhan

Pakalapati

Kumar

et al. 2020

J. Electr. Eng. Technol.

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The establishment of supporting insulators plays a vital role in the continuous operation of the three-phase Gas Insulated Busduct (GIB), which primarily depends on the distribution of electric field stress on the spacer surface. Shape control is a technique used along the spacer surface to achieve uniform field intensity, but this technique can also lead to very irregular shapes. The Triple Junction (TJ) is the region where the field stress has to be reduced. Over a period, high field stresses along the spacer surface will result in a surface flashover and thus de-energize the complete GIB, leading to enormous losses economically. In this paper, a Functionally Graded Material (FGM) spacer for a three-phase GIB has been designed with more number of gradings and further field stress at TJ is minimized by inserting and reshaping the metal inserts (MI) at the end of the enclosure. By doping them with different permittivity values, functionally graded materials are spatially distributed with multiple filler materials to achieve uniform stress on the electric field. Simulation is carried out with the FGM and epoxy (post type) Spacers for different voltages and FGM gradings. With MI, the stress is minimized and an enhanced uniform field allocation along the surface is obtained.

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Design and optimization for GIS UHF-Overvoltage composite sensor

Wang,

Chen,

Zhang

et al. 2025

Measurement

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Effect of AC and switching impulse superimposed voltage on PD characteristics in SF₆ gas

Cited by 10 publications

References 17 publications

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Electric Field Stress in a Three Phase Common Enclosure Gas Insulated Busduct with FGM Post Type Spacer and Reduction with Metal Inserts

Design and optimization for GIS UHF-Overvoltage composite sensor

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Effect of AC and switching impulse superimposed voltage on PD characteristics in SF6 gas

Cited by 10 publications

References 17 publications

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Partial discharge measurement and analysis under lightning impulse superimposed DC voltage in SF6 gas

Electric Field Stress in a Three Phase Common Enclosure Gas Insulated Busduct with FGM Post Type Spacer and Reduction with Metal Inserts

Design and optimization for GIS UHF-Overvoltage composite sensor

Contact Info

Product

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Effect of AC and switching impulse superimposed voltage on PD characteristics in SF₆ gas