Research on the performance of fiber optical current transformer for high voltage filtering capacitor unbalanced current measurement

Zhao, J., Xu, S., Wu, B., Sun, X.

Full text «Opticheskii Zhurnal»

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Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Jun Zhao, Shengguo Xu, Baofeng Wu, Xiaohan Sun. Исследование характеристик волоконно-оптического трансформатора тока для измерения тока дисбаланса высоковольтного фильтрующего конденсатора. Research on the performance of fiber optical current transformer for high voltage filtering capacitor unbalanced current measurement [на англ. яз.] // Оптический журнал. 2022. Т. 89. № 6. С. 64–72. http://doi.org/ 10.17586/1023-5086-2022-89-05-64-72

Jun Zhao, Shengguo Xu, Baofeng Wu, Xiaohan Sun. Исследование характеристик волоконно-оптического трансформатора тока для измерения тока дисбаланса высоковольтного фильтрующего конденсатора. Research on the performance of fiber optical current transformer for high voltage filtering capacitor unbalanced current measurement [in English] // Opticheskii Zhurnal. 2022. V. 89. № 6. P. 64–72. http://doi.org/ 10.17586/1023-5086-2022-89-05-64-72

For citation (Journal of Optical Technology):

Jun Zhao, Shengguo Xu, Baofeng Wu, and Xiaohan Sun, "Research on the performance of a fiber optical current transformer for high voltage filtering capacitor unbalanced current measurement," Journal of Optical Technology. 89(6), 353-358 (2022). https://doi.org/10.1364/JOT.89.000353

Abstract:

Subject of study. A fiber-optic measurement scheme for unbalanced current of high-voltage filtering capacitor is proposed, where an all-fiber temperature sensor based on temperature birefringence is presented to realize the real-time correction of temperature errors. Method. The prototypes of the all-fiber filter unbalanced fiber optical current transformer type and magneto-optical crystal type with a rated current of 1 A and rated voltage of 258 kV have been developed and performance tested. Main results. After temperature correction, the accuracy of all-fiber filter unbalanced fiber optical current transformer type in the range of −40 °C to 70 °C meets the error limit requirements of class 0.2 specified in the Chinese Standard: GB/T 20840.8-2007 ( Instrument transformers — Part 8: Electronic current transformers standard), whose accuracy, integration, reliability and anti-interference ability are better than magneto-optical crystal type. Instrument transformers — Part 8: Electronic current transformers standard whose accuracy, integration, reliability and anti-interference ability are better than magneto-optical crystal type. Practical significance. The proposed scheme has the ability of small current (less than 20 mA) measurement in high voltage (more than 110 kV) scenarios.

Keywords:

high-voltage filtering capacitor, fiber optical current transformer, fiber temperature sensor, temperature correction, accuracy

Acknowledgements:

Aeronautical Science Foundation of China (2019ZH069003); Scientific research projects of ministry and provincial key laboratories in China (2242020k30035).

OCIS codes: 060.2370

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