Volume 65 Issue 5
Jun.  2021
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LI Chuansheng, ZHAO Yeming, LIN Feipeng, LIANG Bo, WANG Jiafu, ZHAO Wei, SHAO Haiming. Research on Fiber-Optic Sensing Technology of Short-Circuit Test Current[J]. Metrology Science and Technology, 2021, 65(5): 3-7. doi: 10.12338/j.issn.2096-9015.2020.9054
Citation: LI Chuansheng, ZHAO Yeming, LIN Feipeng, LIANG Bo, WANG Jiafu, ZHAO Wei, SHAO Haiming. Research on Fiber-Optic Sensing Technology of Short-Circuit Test Current[J]. Metrology Science and Technology, 2021, 65(5): 3-7. doi: 10.12338/j.issn.2096-9015.2020.9054

Research on Fiber-Optic Sensing Technology of Short-Circuit Test Current

doi: 10.12338/j.issn.2096-9015.2020.9054
  • Available Online: 2021-05-08
  • Publish Date: 2021-06-24
  • A fiber-optic short-circuit current sensing method is proposed in order to solve the short-circuit test current calibration problem for the AC and DC switch electric appliance. A low-frequency simplified dynamic model of the fiber-optic current sensor was established, and the parameters of the closed-loop signal-detection system were obtained according to the time-domain and frequency-domain characteristics simulation results. The results show that the dynamic performance of the sensor can meet the requirements of tracking the measured short-circuit current. A fiber-optic current sensor calibration device was built, and the calibration results showed that the measurement accuracy of the sensor prototype was better than 0.2% in the range of 5 to 300 kA DC and 5 to 50 kA power frequency. The comparison tests of the AC short-circuit current between the fiber-optic current sensor and the common adopted Rogowski coil were performed. The results showed that for DC short-circuit currents from 6 to 100 kA, the relative error between the shunt and the fiber-optic current sensor was less than 0.3%. For the power frequency short-circuit currents from 10 to 130 kA, the relative error between the Rogowski coil and the fiber-optic current sensor does not exceed 0.2%. The research work provides a new solution for the short-circuit test current measurement.
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