Measurement and simulation of partial discharge using optical signal based on crystal fluorescent fiber

Optical signals measurement of discharge plasma in air switch cabinet using a fluorescent optical fiber as the sensor

“…It can be found that T 1 , T 2 and T 3 increase with the increase of applied voltage. This is due to the fact that the discharge quantity will increase with the applied voltage, and researches showed that the first-order integral value of the PD signal, which is related to the amplitude, waveform and the time duration, have a positive correlation with the PD quantity [16]. Additionally, the rising edge time T 1 is in the range of tens to hundreds of nanoseconds, which is much shorter than the falling edge time T 2 .…”

“…Plasmas will be generated when PDs occur [12], which is accompanied by light, and optical-based sensors have been shown to be very sensitive in discharge plasma measurements [13,14]. Among many PD sensors, fluorescent optical fiber is highly praised for its high resistance to electromagnetic interference, high sensitivity and ease to be built-in [15][16][17]. Since Schwarz proposed that fluorescent fiber sensors have higher sensitivity than conventional quartz fibers [18], scholars have developed many advanced fiber optic-based PD detection systems, and subsequently proposed fault diagnosis algorithms [19,20].…”