研究目的
Investigating the effects of the cylinder coil on the sensitivity, the bandwidth and the detection limit of a high sensitivity optical fiber sensor for detecting the acoustic emission generated by the partial discharge in gas-insulated-switchgear (GIS).
研究成果
The proposed AE optical fiber sensor demonstrated superior sensitivity and detection capabilities compared to conventional PZT sensors, with a 32 dB higher average sensitivity and the ability to detect partial discharges at a 17.1 % lower initial voltage. The amplitude of the signal detected by the optical system was 525 % higher than that detected by the PZT system.
研究不足
The study focuses on the detection of partial discharges in GIS using an optical fiber sensor, and the results may not be directly applicable to other types of electrical equipment or different environmental conditions.
1：Experimental Design and Method Selection:
A model was established to investigate the effects of the cylinder coil on the sensitivity, the bandwidth and the detection limit. The proposed sensor was modified based on the effects.
2：Sample Selection and Data Sources:
The sensor was tested in a 126 kV GIS with a small aluminum particle to generate partial discharges.
3：List of Experimental Equipment and Materials:
Narrow band laser source (RIO Orion?), 2 × 2 fiber coupler (50:50), optical circulator, 45° fiber optic Faraday rotator mirrors (FRM), balanced photodetector (BPD, Thorlabs PDB415A), amplifiers (40 dB, 10 kHz - 2 MHz bandwidth, soundwel), oscilloscope.
4：Experimental Procedures and Operational Workflow:
The sensor was installed on the GIS, and partial discharge experiments were performed.
5：Data Analysis Methods:
The frequency responses of the AE optical fiber sensor and the conventional PZT were compared.
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