冲击电压下SF<sub>6</sub>气体在极不均匀场中局部放电的时频特征

任重 1; 董明 1; 任明 1; 杨彦博 1; 肖智刚 1; 邱爱慈 1; 2

doi:10.7652/xjtuxb201308020

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冲击电压下SF₆气体在极不均匀场中局部放电的时频特征

更新时间：2025-05-08

- 冲击电压下SF₆气体在极不均匀场中局部放电的时频特征
- Time-Frequency Characteristics of Partial Discharge of SF₆ Gas in an Extremely Uneven Field under Impulse Voltage
- 西安交通大学学报 2013年47卷第8期页码：115-120
- 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：
  
  : 2013-02-26。作者简介: 任重(1989—),男,硕士生;董明(通信作者),男,副教授。基金项目: 国家自然科学基金资助项目(50907051)
- DOI：10.7652/xjtuxb201308020
  中图分类号： TM835.4
- 网络首发：2013-08-10，
  
  纸质出版：2013
- 稿件说明：
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任重 1, 董明 1, 任明 1, 等. 冲击电压下SF₆气体在极不均匀场中局部放电的时频特征[J]. 西安交通大学学报, 2013,47(8):115-120. DOI: 10.7652/xjtuxb201308020.

Time-Frequency Characteristics of Partial Discharge of SF₆ Gas in an Extremely Uneven Field under Impulse Voltage[J]. 2013, 47(8): 115-120. DOI: 10.7652/xjtuxb201308020.
任重 1, 董明 1, 任明 1, 等. 冲击电压下SF₆气体在极不均匀场中局部放电的时频特征[J]. 西安交通大学学报, 2013,47(8):115-120. DOI: 10.7652/xjtuxb201308020. DOI：

Time-Frequency Characteristics of Partial Discharge of SF₆ Gas in an Extremely Uneven Field under Impulse Voltage[J]. 2013, 47(8): 115-120. DOI: 10.7652/xjtuxb201308020. DOI：

摘要

为了研究冲击电压下GIS腔体内绝缘缺陷局部放电的发生发展机理

采用短时傅里叶变换(STFT)、伪Wigner-Ville分布和Gabor分布理论

对标准负极性操作冲击电压下SF

气体在极不均匀场的局部放电光信号和电流信号的时频特征进行了分析。结果表明:STFT、伪Wigner-Ville分布和Gabor分布均能有效提取放电信号的时频特征

但Gabor分布具有较好的时频聚集性

不具有交叉干扰项

且对信号的时频特征的刻画最为细致

而STFT的时频聚集性较差

伪Wigner-Ville分布则存在固有交叉干扰项; 冲击电压下局部放电光信号和电流信号在时频平面的分布不同

光脉冲的能量上升到峰值的时间要小于电流脉冲。

Abstract

To investigate the mechanism of partial discharge(PD)of insulation defects in gas-insulated metal-enclosed switchgear(GIS)under impulse voltage

time-frequency characteristics of optical signals and current signals of PD are analyzed with short time Fourier transform(STFT)

pseudo Wigner-Ville distribution theory and Gabor distribution theory. The analysis reveals that: 1)The time-frequency characteristics of PD signals can be effectively extracted; 2)Gabor distribution of PD signals is endowed with the best time-frequency aggregation behavior without cross-interference items and reflects the most detailed characteristics of PD signals in time-frequency plane; 3)STFT of PD signals possesses the poorest time-frequency aggregation behavior and 4)Pseudo Wigner-Ville distribution of PD signals includes several inherent cross-interference terms. The time-frequency characteristics of the optical signals and the current signals of PD are different and the rising time of the optical pulse is less than that of the current pulse in time-frequency plane.

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references

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冲击电压下SF6气体在极不均匀场中局部放电的时频特征

Time-Frequency Characteristics of Partial Discharge of SF6 Gas in an Extremely Uneven Field under Impulse Voltage

DOI：10.7652/xjtuxb201308020

摘要

Abstract

关键词

Keywords

references

冲击电压下SF₆气体在极不均匀场中局部放电的时频特征

Time-Frequency Characteristics of Partial Discharge of SF₆ Gas in an Extremely Uneven Field under Impulse Voltage