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Hydrogen content is an important indicator for judging the internal fault of oil-immersed transformers. The accuracy and timeliness of the detection results of the hydrogen sensor are of great significance for the early warning of equipment failure. In this paper, a test platform was designed and built to study the performance of two types of sensors, hydrogen measurement in gas mixture and direct measurement of hydrogen in oil based on palladium alloy, and the performance of two types and three sensors were compared and tested from six aspects: response characteristics, repeatability, sensitivity, linearity, cross-interference and temperature. The results show that the sensitivity of the hydrogen sensor based on \({\text{SnO}}_{2}\) reaches 0.3 V/ppm, and the response time is about 40 min considering the oil-gas separation process. The change of hydrogen concentration in oil measured by the GRIDSCAN 5000 direct detection sensor of hydrogen in oil based on palladium alloy is about 1.7 ppm per minute and the response time is about 60 min, and the change of hydrogen concentration in oil measured by the Model 3000 direct detection sensor is about 2.5 ppm per minute, and the response time is about 60 min. The sensitivity of the hydrogen sensor is better than that of the palladium alloy-based hydrogen in oil direct measurement sensor, and the response time is also shorter. However, due to the large size of the degassing module, it is extremely inconvenient for practical operation. The direct-to-oil hydrogen sensor is small in size and easy to carry, and is widely used in fault detection of electrical equipment.

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Comparative Study on the Performance of \({{\text{SnO}}}_{2}\) Based and Palladium Based Transformer Oil Dissolved Hydrogen Gas Sensors

  • 会议论文

  • 发表日期：

    2025年

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  • Liufang Wang,
  • Honggeng Yuan,
  • Fengxiang Ma,
  • Chen Hang,
  • Zhengjie Xu,
  • Kang Li

摘要

Hydrogen content is an important indicator for judging the internal fault of oil-immersed transformers. The accuracy and timeliness of the detection results of the hydrogen sensor are of great significance for the early warning of equipment failure. In this paper, a test platform was designed and built to study the performance of two types of sensors, hydrogen measurement in gas mixture and direct measurement of hydrogen in oil based on palladium alloy, and the performance of two types and three sensors were compared and tested from six aspects: response characteristics, repeatability, sensitivity, linearity, cross-interference and temperature. The results show that the sensitivity of the hydrogen sensor based on \({\text{SnO}}_{2}\) reaches 0.3 V/ppm, and the response time is about 40 min considering the oil-gas separation process. The change of hydrogen concentration in oil measured by the GRIDSCAN 5000 direct detection sensor of hydrogen in oil based on palladium alloy is about 1.7 ppm per minute and the response time is about 60 min, and the change of hydrogen concentration in oil measured by the Model 3000 direct detection sensor is about 2.5 ppm per minute, and the response time is about 60 min. The sensitivity of the hydrogen sensor is better than that of the palladium alloy-based hydrogen in oil direct measurement sensor, and the response time is also shorter. However, due to the large size of the degassing module, it is extremely inconvenient for practical operation. The direct-to-oil hydrogen sensor is small in size and easy to carry, and is widely used in fault detection of electrical equipment.