Prof. Chunyang Han Profile

Prof. Chunyang Han

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Proceedings Article | 9 January 2023 Paper

Fiber Fabry-Perot sensor for partial discharges detection

Maosen Guo, Hui Ding, Chen Chen, Chunyang Han

Proceedings Volume 12507, 125071V (2023) https://doi.org/10.1117/12.2656182

KEYWORDS: Fiber optics sensors, Sensors, Ultrasonics, Fiber optics, Signal detection, Fabry–Perot interferometers

Read Abstract +

Partial discharge (PD) is an early warning for deterioration of oil-paper insulated equipment, which seriously endangers the safety of power system. It is significant to realize online detection of PD in oil-paper insulated equipment. Due to the advantages of anti-electromagnetic interference and locating the discharge source, the acoustic emission (AE) method is widely used in online PD detection. Conventional piezoelectric transducer (PZT) acoustic sensors cannot be installed inside equipment in practical applications, resulting in low sensitivity and susceptibility to electromagnetic interference from electrical equipment. To solve the above issues, an ultrasonic sensor based on Fabry-Perot (FP) interferometer with gold-coated circular fused silica diaphragm is proposed and experimentally verified. The results show that the fiber optic ultrasonic sensor can be placed inside the oil-paper insulated equipment for partial discharge detection, and has higher sensitivity compared with the traditional PZT.

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