All fibre-optic simultaneous detection of optical and acoustic emission from partial discharges in silicone elastomer

Abstract

In high-voltage facilities of power stations and transmission networks, discharge activities leading to catastrophic failure can occur. Early detection of partial discharges (PD) in polymeric insulations of HV cable terminations and joints is therefore increasingly important. This paper describes a monitoring methodology to detect PD activity in silicone elastomer by two independent fibre-optic sensor types. Fluorescent fibre-based sensors are sensitive to plasma optical emission already at the onset of PD while an acoustic fibre-optic sensor responds to acoustic emission from the PD during its progression. The sensitivities of both sensor types are compared, and it is demonstrated that they provide complementary information for fibre-optic sensor-based monitoring of high-voltage cable accessories.

Optical sensing in condition monitoring of gas insulated apparatus: a review

“…Moreover, many researchers have also reported many non‐invasive interferometric optical‐fibre ultrasonic sensors for PD detection [54–57]. Although these optical sensors have not been tested in the actual gas insulated apparatus, the feasibility can be predicted.…”

“…Moreover, the amplitude of the signal detected by the proposed AE optical system was 525% higher than that detected by the PZT system, as shown in Fig. 14. Moreover, many researchers have also reported many noninvasive interferometric optical-fibre ultrasonic sensors for PD detection [54][55][56][57]. Although these optical sensors have not been tested in the actual gas insulated apparatus, the feasibility can be predicted.…”

Optical fiber sensor of partial discharges in High Voltage DC experiments

“…Currently acoustic techniques using OF sensors are being developed [6][7][8][9]. There are some studies in this field but not many demonstrations with real PD signals.…”