Partial discharges in void defect of gas insulated switchgear insulator under standard aperiodic and oscillating switching impulses

Ren, Ming; Dong, Ming; Zhang, Chongxing; Liu, Jialin

doi:10.1109/tdei.2016.7736855

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…Besides, the high voltage amplitude of the impulse voltage can excite defects that may not be excited at AC voltage. Thus, PD detection under impulse voltage is an effective supplement to the evaluation of transformer insulation status [27,28].…”

Section: Diagnostic Methods For Transformermentioning

confidence: 99%

Fault diagnosis technologies for power transformers during the on‐site inductive oscillating switching impulse voltage withstand test

Zhang

Wang

Guo

et al. 2022

IET Generation Trans & Dist

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Although oscillating switching impulse (OSI) voltage is recommended for the transformer field test, the lack of corresponding fault diagnosis technologies limits its application in the field. In this study, the inductive OSI test technology and diagnostic methods are investigated. The front time and the oscillation frequency of the OSI are altered by changing the additional inductance, whereas the tail time is affected by both the front and tail resistance. The OSI voltage withstand test is carried out on a 110 kV three‐phase double‐winding transformer on site. Furthermore, transfer function (TF) analysis is used for the diagnosis of transformer insulation with high sensitivity during the OSI test. The fault winding is distinguished by comparing the change in the voltage TF and current TF at different voltage levels. The partial discharge (PD) detection method has the highest sensitivity, which realizes the early diagnosis of insulation faults. The insulation status of the windings is ascertained based on the number and amplitude of PDs. The test results prove that the inductive OSI voltage withstand test is easy to perform on site and can successfully diagnose the insulation faults of the transformer in more detail compared with other routine insulation tests.

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Section: Diagnostic Methods For Transformermentioning

confidence: 99%

Fault diagnosis technologies for power transformers during the on‐site inductive oscillating switching impulse voltage withstand test

Zhang

Wang

Guo

et al. 2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

Computation and Analysis of Electric Field Distribution Under Lightning Impulse Voltage for 1000-kV Gas-Insulated-Switchgear Spacer

Yang

Zhu

Tian

et al. 2020

J. Electr. Eng. Technol.

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Experimental research on the influence of temperature on the discharge signal of void defects in GIS

et al. 2021

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Temperature is an important environmental factor during the operation of gas-insulated switchgear (GIS), affecting the evaluation results of the GIS equipment to increase the risk of the power system. However, the influence of temperature on the partial discharge detection signal of GIS is still unclear. Aimed at the common void defects in GIS, the law of change on the number of ultrahigh-frequency (UHF) pulses, the UHF amplitude, the characteristic value of the UHF map, and the maximum apparent charge of a single pulse with temperature are obtained using the UHF method and IEC60270, and corresponding theoretical analysis is carried out. The results show that an increase in temperature leads to a decrease in the void discharge delay time, causing an increase in UHF pulses and a decrease in the apparent charge of a single discharge pulse in the experiment. The increase of temperature makes the void discharge current rise quickly so that the induced UHF amplitude increases. In the range of 40-70°C, the maximum pulse amplitude increases by approximately 30% for every 10°C increase, and the average pulse amplitude increases by approximately 12%. The result of UHF signals affected by temperature obtained in this study has research significance for the realisation of a comprehensive evaluation of the insulation state of GIS equipment considering temperature.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Partial discharges in void defect of gas insulated switchgear insulator under standard aperiodic and oscillating switching impulses

Cited by 11 publications

References 8 publications

Fault diagnosis technologies for power transformers during the on‐site inductive oscillating switching impulse voltage withstand test

Fault diagnosis technologies for power transformers during the on‐site inductive oscillating switching impulse voltage withstand test

Computation and Analysis of Electric Field Distribution Under Lightning Impulse Voltage for 1000-kV Gas-Insulated-Switchgear Spacer

Experimental research on the influence of temperature on the discharge signal of void defects in GIS

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