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| Optimization Analysis and Experiment Study on Measurement Performance of All-Fiber Optical Current Transformer |
| Li Yansong1, Wang Bing2, Liu Jun1, Jia Yupei2, Yu Zhihong2 |
1. Institute of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China;
2. China Electric Power Research Institute Beijing 100192 China |
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Abstract Mathematical model of linear birefringence’s influence on fiber-optical current transformer was established, where intrinsic linear birefringence, linear birefringence caused by bending and linear birefringence caused by temperature was analyzed comprehensively. Temperature variation, fiber bending radius and fiber winding turns are three major factors which affect FOCT’s measurement performance in accuracy and sensitivity. The bigger the temperature variation is, the smaller the accuracy and sensitivity of FOCT will be. With the increase of fiber bending radius, the accuracy and sensitivity of FOCT decreases first and then becomes larger. As the fiber winding turns increase, the accuracy of FOCT is degraded and the sensitivity of FOCT is improved. Based on the theory analysis mentioned above, a concrete optimization method which takes both accuracy and sensitivity into consideration was proposed. Besides, optimization analysis and calculation are performed with simulation on FOCT. Finally, experiment platform of FOCT is designed and set up. Linear test, temperature cycling test, accuracy test and sensitivity test are performed. The optimal fiber bending radius and winding turns arewere selected, which satisfies the requirements of both accuracy and sensitivity during temperature fluctuation. Correctness of the theoretical analysis is verified by the results of simulation and experiment.
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Received: 18 April 2017
Published: 14 September 2018
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2018, Vol. 33 
