Partial discharge behaviors in cavities under square voltage excitation at very low frequency

2016 ◽  
Author(s):  
H.V.P. Nguyen ◽  
B.T. Phung ◽  
T. Blackburn
Keyword(s):  
Partial Discharge ◽  
Low Frequency ◽  
Very Low Frequency

scholarly journals Review of Partial Discharge Activity Considering Very-Low Frequency and Damped Applied Voltage

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 440
Author(s):  
Mohamad Ghaffarian Niasar ◽  
Xiaolei Wang ◽  
Respicius Clemence Kiiza
Keyword(s):  
Partial Discharge ◽  
Time Lag ◽  
Low Frequency ◽  
Research Field ◽  
Very Low Frequency ◽  
Main Development ◽  
Charge Decay ◽  
Power Frequency ◽  
Statistical Time ◽  
Inception Voltage

When detecting the presence of partial discharge (PD) activity in the insulation system in high-voltage equipment, the excitation voltages at variable frequency have been widely used instead of power-frequency (50/60 Hz) sinusoidal voltage in order to reduce the charging power. This work reviews the relevant research on PD activity at very low frequency (VLF) method, including sinusoidal or cosine-rectangular voltage shape, and damped AC (DAC) method. Based on the research history and development status, some major PD characteristics, such as PD inception voltage (PDIV), PD amplitude, PD charge, PD phase-resolved pattern, and several hot issues, such as surface charge decay and statistical time lag, have been discussed. Moreover, the advantages, disadvantages, and applied conditions of two reviewed methods has been summarized. Finally, the prospects have been made on the main development trends of this research field in the future.

Characterization and comprehension of corona partial discharge in air under power frequency to very low frequency voltage

2018 ◽  
Vol 20 (5) ◽  
pp. 054016 ◽  
Author(s):  
Yuanxiang ZHOU ◽  
Zhongliu ZHOU ◽  
Ling ZHANG ◽  
Yunxiao ZHANG ◽  
Yajun MO ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Low Frequency ◽  
Very Low Frequency ◽  
Power Frequency
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