光纖電流互感器關(guān)鍵狀態(tài)在線監(jiān)測技術(shù)研究
[Abstract]:During the practical operation of fiber optic current transformer (FOCT), the system error will increase or the function will fail due to the change of the external environment or the deterioration of the performance of the internal devices. The above changes are slow, and some key state parameters (such as ambient temperature, operating state of SLD light source, half-wave voltage of phase modulator, detector receiving light power, etc.) of FOCT can be monitored to achieve early warning. In this paper, the hardware circuit and algorithm for on-line monitoring of key state parameters of FOCT are presented, and the on-line monitoring system of FOCT critical state is developed. And in the Chinese Academy of Electric Sciences electronic transformer performance assessment platform for a period of one year. Through the analysis of the running data of the hanging network and the method of theoretical calculation and design experiment verification, the influence of the key state parameters on the performance of the system is analyzed. It is found that the main factor affecting the system error is the ambient temperature. The direct factor affecting the reliability of the system is the light power received by the detector. In order to improve the accuracy and reliability of FOCT, it is necessary to compensate the errors caused by temperature change and to give a timely warning to the attenuation of optical power. This research provides theoretical basis and data support for the improvement of FOCT design, which is helpful to further improve the reliability and accuracy of FOCT field operation.
【學位授予單位】:華北電力大學(北京)
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM452
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