Partial Discharge on SF<sub>6</sub> Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage

doi:10.7652/xjtuxb201604017

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Partial Discharge on SF₆ Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage

更新时间：2025-07-09

- Partial Discharge on SF₆ Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage
- Vol. 50, Issue 4, Pages: 108-116(2016)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201604017
  CLC： TM855
- Online First：10 April 2016，
  
  Published：2016
- 稿件说明：
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Partial Discharge on SF₆ Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage[J]. 2016, 50(4): 108-116. DOI: 10.7652/xjtuxb201604017.
DOI：

Partial Discharge on SF₆ Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage[J]. 2016, 50(4): 108-116. DOI: 10.7652/xjtuxb201604017. DOI：

摘要

为了深入研究尖板模型振荡雷电冲击电压下局部放电特性

首先搭建了振荡冲击电压发生器

产生符合IEC 60060-3标准的振荡型雷电冲击电压

基于特高频法和脉冲电流法

建立了冲击电压下局部放电测量系统

进而构建了SF

尖板模型

对负极性振荡雷电冲击电压下局部放电进行了测量

对比了特高频法和脉冲电流法测量局部放电的灵敏度

分析了放电时延、放电幅值、放电数目和放电相位随外施电压的变化规律。结果表明:特高频法测量灵敏度更高

适合在气体绝缘组合电器(GIS)现场冲击耐压试验中使用; 局部放电集中在外施电压各波峰附近; 随着外施电压的升高

放电时延和放电起始相位急剧减小

放电结束相位则稍有增大; 各周期放电幅值和数目随波峰电压的升高而线性增加。进一步分析表明

在负极性振荡雷电冲击电压下

局部放电的产生和发展可用金属电极表面发射、负离子场致碰撞脱附和电晕稳定化作用进行很好的阐释。研究成果有助于GIS现场冲击耐压试验中局部放电的检测与分析。

Abstract

Aiming at partial discharge(PD)characteristics on needle-plane defect under oscillating lighting impulse voltage

an oscillating impulse voltage generator was constructed

and the oscillating lighting impulse waveform was obtained

which meets the requirement of IEC 60060-3 standard. The partial discharge detecting system was built based on UHF detection and pulse current detection. A needle-plane defect model was designed and its partial discharge under negative oscillating impulse voltage was measured. The measurement sensitivity of UHF detection was compared with that of pulse current detection. The relations of the applied voltage with statistical time lag

PD amplitude

PD time and PD phase distribution were analyzed. The results show that UHF detection with higher measurement sensitivity is suitable for on-site impulse voltage withstand test; PD appears around each wave peak of the applied voltage; with the increasing applied voltage

statistical time lags and starting phase decrease rapidly

while the ending phase increases slightly; with the increasing peak voltage in a period. PD amplitude and PD time in each oscillating period both increase linearly. Further analysis indicates that the occurrence and development of PD under negative oscillating lighting impulse voltage can be well explained by electron emission from metal surface

field detachment from negative ions

and corona stabilization effect. This approach is valuable for PD measurement and analysis in on-site impulse voltage withstand test for GIS.

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references

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Related Institution

State Key Laboratory of Power Equipment and Electrical Insulation, Xi'an Jiaotong University

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⁰

Partial Discharge on SF6 Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage

DOI：10.7652/xjtuxb201604017

摘要

Abstract

关键词

Keywords

references

Partial Discharge on SF₆ Needle-Plane Defect under Negative Oscillating Lighting Impulse Voltage