Scholarlink

<p>Fabry–Perot (F–P) sensing, as an effective method for partial discharge (PD) ultrasound signal detection, offers advantages such as electromagnetic interference resistance and high sensitivity. However, current research primarily focuses on the size and material of the diaphragm, with insufficient attention paid to diaphragm structure. In comparison, this study designs an acoustic-sensitive diaphragm with a grooved oil cavity structure, achieving a resonant frequency of up to 60&#xa0;kHz and a peak sensitivity of 792.5&#xa0;mV/Pa. Due to the presence of the cavity in the probe, the impact of oil pressure on reliability and sensitivity remains unclear. Therefore, the optical fiber sensor reliability evaluation device was designed to assess the sensor’s reliability under oil pressure. The results show that the sensor’s sensitivity decreases as oil pressure increases, with an amplitude reduction of approximately 46.7% at 200&#xa0;kPa compared to atmospheric pressure. Additionally, the PD detection platform was established, and the F–P sensor successfully detected PD ultrasound signals, the signal-to-noise ratio (SNR) represents a 5.8&#xa0;dB improvement compared with the Piezoelectric Transducers (PZT) sensor. In summary, this research designs a highly sensitive F–P sensor and evaluates the impact of the oil pressure environment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Design and evaluation of F–P sensor for partial discharge detection in oil-immersed transformer

  • 期刊论文

  • 发表日期：

    2026年3月23日

查看全文
  • Jinggang Yang,
  • Tonglei Wang,
  • Jian Shao,
  • Yuandi Lin,
  • Peng Wu,
  • Yuncai Lu,
  • Chao Wei,
  • Ruizhi Wang,
  • Jun Jiang

摘要

Fabry–Perot (F–P) sensing, as an effective method for partial discharge (PD) ultrasound signal detection, offers advantages such as electromagnetic interference resistance and high sensitivity. However, current research primarily focuses on the size and material of the diaphragm, with insufficient attention paid to diaphragm structure. In comparison, this study designs an acoustic-sensitive diaphragm with a grooved oil cavity structure, achieving a resonant frequency of up to 60 kHz and a peak sensitivity of 792.5 mV/Pa. Due to the presence of the cavity in the probe, the impact of oil pressure on reliability and sensitivity remains unclear. Therefore, the optical fiber sensor reliability evaluation device was designed to assess the sensor’s reliability under oil pressure. The results show that the sensor’s sensitivity decreases as oil pressure increases, with an amplitude reduction of approximately 46.7% at 200 kPa compared to atmospheric pressure. Additionally, the PD detection platform was established, and the F–P sensor successfully detected PD ultrasound signals, the signal-to-noise ratio (SNR) represents a 5.8 dB improvement compared with the Piezoelectric Transducers (PZT) sensor. In summary, this research designs a highly sensitive F–P sensor and evaluates the impact of the oil pressure environment.