Analysis method for the operation health of all-fiber optical current transformer

2020 ◽  
Author(s):  
Jieqing Deng ◽  
Xiaozheng Tang ◽  
Xu Wei ◽  
Chunlei Yu ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Current Transformer ◽  
Analysis Method ◽  
Fiber Optical

scholarly journals Research on error mechanism analysis and compensation method of Fiber-Optical Current Transformer

2019 ◽  
Vol 1311 ◽  
pp. 012012
Author(s):  
Dengyun Li ◽  
Min Lei ◽  
Dandan Zhang ◽  
Shi Mo ◽  
Yongfeng Chai
Keyword(s):  
Current Transformer ◽  
Compensation Method ◽  
Mechanism Analysis ◽  
Fiber Optical

scholarly journals Fault Mechanism of Fiber Optical Current Transformer Based on Signal Processing Method

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Fubin Pang ◽  
Qiang Huang ◽  
Yu Liu ◽  
Peng Li ◽  
Xiangping Kong ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic ◽  
Harmonic Component ◽  
Current Transformer ◽  
Processing Method ◽  
Fault Analysis ◽  
Measured Current ◽  
Signal Processing Method ◽  
Fiber Optical ◽  
Fault Mechanism

The fiber optical current transformer (FOCT) with sine wave modulation has been widely used in the DC transmission project, while its fault rate is much higher than that of an electromagnetic current transformer, which seriously threatens the safe operation of power grid. In order to investigate the fault mechanism of FOCT, the output signal model of the FOCT photodetector is established, and its basic methods of modulation and demodulation are analyzed to explore the influencing factors of the signal processing method used in the calculation of measured current. It is found that the reduction of the second harmonic component in the photodetector output is the root cause of FOCT fault, and the optical path, modulation signal amplitude, and measured current are important factors affecting the second harmonic component. The influencing law of three factors on the second harmonic component is calculated by simulation and the characteristic differences between them are given. Finally, the fault simulation test of FOCT light intensity and a modulation circuit were carried out in the laboratory, and the results verify the correctness of theoretical analysis. The research in this paper provides reference for fault analysis and reliability improvement of FOCT.

scholarly journals Design and applicability analysis of independent double acquisition circuit of all-fiber optical current transformer

2019 ◽  
Vol 2 (6) ◽  
pp. 531-540
Author(s):  
Songlin Gu ◽  
Liu Han ◽  
Dongwei Liu ◽  
Wenbin Yu ◽  
Zhihong Xiao ◽  
...  
Keyword(s):  
Current Transformer ◽  
Fiber Optical

Simulation of fiber optical current transformer base a novel structure

2015 ◽  
pp. 757-760
Author(s):  
J Xie ◽  
T Shen ◽  
L Liu ◽  
S Meng ◽  
W Liu ◽  
...  
Keyword(s):  
Current Transformer ◽  
Novel Structure ◽  
Fiber Optical

Influence of Loop Gain on Measurement Accuracy of Fiber Optical Current Transformer

2016 ◽  
Vol 43 (9) ◽  
pp. 0910002
Author(s):  
于佳 Yu Jia ◽  
张春熹 Zhang Chunxi ◽  
王夏霄 Wang Xiaxiao ◽  
李传生 Li Chuansheng ◽  
张宇宁 Zhang Yuning
Keyword(s):  
Measurement Accuracy ◽  
Current Transformer ◽  
Loop Gain ◽  
Fiber Optical
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