摘要
对气体绝缘金属封闭输电线路(GIL)设备进行局部放电故障诊断与定位对其内部绝缘保护具有重要意义,由于GIL呈全封闭结构,现有外置式的检测方式对内部缺陷检测不够敏感,无法实现局部放电的量化描述与定位。因此,提出一种基于Teager能量谱极限学习机的局部放电故障诊断与定位方法。以脉冲电流能量波动特征与频段为分析对象,首先,利用Teager能量算子提取不同放电故障位置的能量波动特征;其次,利用小波包变换对不同位置的放电故障能量特征频段占比进行计算;最后,结合极限学习机(ELM)对GIL设备局部放电故障进行定位与诊断。结果表明,不同位置的局部放电缺陷能量波动差别明显,利用小波包变换分析后的特殊频段能量占比可以作为故障分类的依据。通过与其他在线监测方法的对比,表明ELM可以实现GIL设备局部放电故障的有效定位与诊断。
Partial discharge fault diagnosis and location of gas insulated metal enclosed transmission line(GIL)is of great significance for its internal insulation protection.Because GIL is fully enclosed structure,the existing external detection method is not sensitive to the internal defect detection,so it is unable to realize the quantitative description and location of partial discharge.Therefore,a partial discharge fault diagnosis and location method based on Teager energy spectrum extreme learning machine was proposed.Firstly,Teager energy operator was used to extract the energy fluctuation characteristics of different discharge fault locations.Secondly,wavelet packet transform was used to calculate the proportion of characteristic frequency band of discharge fault energy at different positions.Finally,combined with extreme learning machine(ELM),the partial discharge fault of GIL equipment was located and diagnosed.The results show that the energy fluctuation of partial discharge defects at different positions is obviously different,the energy proportion of special frequency band analyzed by wavelet packet transform(WPT)can be used as the basis of fault classification.Compared with other on-line monitoring methods,ELM can effectively diagnose and locate partial discharge fault of GIL equipment.
作者
戴锋
陈轩
王立宪
马宏忠
DAI Feng;CHEN Xuan;WANG Lixian;MA Hongzhong(State Grid Jiangsu Electric Power Co.,Ltd.Maintenance Branch Company,Nanjing 211102,Jiangsu,China;College of Energy and Electrical Engineering,HoHai University,Nanjing 211100,Jiangsu,China)
出处
《电气传动》
2022年第22期73-80,共8页
Electric Drive
基金
国网江苏省电力公司重点科技项目(J2020040)。
关键词
气体绝缘金属封闭输电线路
局部放电
脉冲电流
Teager能量谱
小波包变换
故障诊断与定位
gas insulated metal enclosed transmission line(GIL)
partial discharge(PD)
pulse current
Teager energy spectrum
wavelet packet transform(WPT)
fault location and diagnosis
