LI Da-jian1, LIANG Ji-zhong1, BU Ke-wei2, et al. Ultrasonic Detection of Partial Discharge on Typical Defects in GIS[J]. High voltageapparatus, 2009, 45(1): 72-75.
LI Da-jian1, LIANG Ji-zhong1, BU Ke-wei2, et al. Ultrasonic Detection of Partial Discharge on Typical Defects in GIS[J]. High voltageapparatus, 2009, 45(1): 72-75.DOI:
For detecting partial discharge of SF6 gas insulation switchgear(GIS) with the ultrasonic method
a 220 kV GIS bus bar cavity was taken as an object to design and simulate the typical partial discharge models in GIS.PD signals on different defects were thus detected with the ultrasonic method.The experimental results indicated that the ultrasonic signals of different defects showed different characteristics in waveform
amplitude and phase resolved partial discharge chart.The PD source could be accurately located with the ultrasonic method by changing the location of sensor.The research demonstrate that the ultrasonic method has better sensitivity and accuracy in PD source localization
which is helpful in PD pattern recognition for GIS.