TY - GEN
T1 - Study on characteristics of Fiber Optic Current Transformer and the impact on reliability of protection
AU - Wang, Ye
AU - Yuan, Yubo
AU - Bu, Qiangsheng
AU - Daonong, Zhang
AU - Ji, Jianfei
AU - Li, Ran
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/12/18
Y1 - 2014/12/18
N2 - Fiber Optic Current Transformer (FOCT) realizes current measurement by using the Faraday magneto-optical effect. With advantage of unsaturation, wide dynamic range and immunity to electromagnetic interference etc, FOCT is widely used in smart substation and HVDC transmission, so the accuracy of measurement and reliability of long-term operated have become the focus of attention[1-3]. In this paper based on the structure and principle of FOCT, the AC and DC transient response characteristic are analyzed ; the accuracy characteristic and influence factors of FOCT are researched(include Verdet constant, turns of fiber coil, particle nature of light, optical components aging, ambient temperature, magnetic field in space etc), especially impact of peak current on its accuracy, and the influence of fiber stress in its field installation process, correctness of polarity on its accuracy is also studied; furthermore the problem of protection reliability caused by characteristics of digital sampling, fiber installation and polarity is analyzed base on analysis of accuracy and transient characteristics of FOCT, then points out some strategy to deal with it; Finally the measures to improve reliability of FOCT are proposed based on FOCT operation and defects in practical engineering applications.
AB - Fiber Optic Current Transformer (FOCT) realizes current measurement by using the Faraday magneto-optical effect. With advantage of unsaturation, wide dynamic range and immunity to electromagnetic interference etc, FOCT is widely used in smart substation and HVDC transmission, so the accuracy of measurement and reliability of long-term operated have become the focus of attention[1-3]. In this paper based on the structure and principle of FOCT, the AC and DC transient response characteristic are analyzed ; the accuracy characteristic and influence factors of FOCT are researched(include Verdet constant, turns of fiber coil, particle nature of light, optical components aging, ambient temperature, magnetic field in space etc), especially impact of peak current on its accuracy, and the influence of fiber stress in its field installation process, correctness of polarity on its accuracy is also studied; furthermore the problem of protection reliability caused by characteristics of digital sampling, fiber installation and polarity is analyzed base on analysis of accuracy and transient characteristics of FOCT, then points out some strategy to deal with it; Finally the measures to improve reliability of FOCT are proposed based on FOCT operation and defects in practical engineering applications.
KW - Fiber Optic Current Transformer
KW - accuracy
KW - peak current
KW - reliability
KW - transient characteristics
UR - https://www.scopus.com/pages/publications/84942328847
U2 - 10.1109/CICED.2014.6991827
DO - 10.1109/CICED.2014.6991827
M3 - 会议稿件
AN - SCOPUS:84942328847
T3 - China International Conference on Electricity Distribution, CICED
SP - 839
EP - 844
BT - CICED 2014 - 2014 China International Conference on Electricity Distribution, Proceedings
PB - IEEE Computer Society
T2 - 2014 6th China International Conference on Electricity Distribution, CICED 2014
Y2 - 23 September 2014 through 26 September 2014
ER -