| 引用本文: | 王夏霄,王野,王熙辰,等.全光纤电流互感器动态特性实验研究[J].电力系统保护与控制,2014,42(3):9-14. |
| WANG Xia-xiao,WANG Ye,WANG Xi-chen,et al.Experimental research on dynamic characteristics of fiber optical current transformer[J].Power System Protection and Control,2014,42(3):9-14 |
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| 摘要: |
| 全光纤电流互感器（FOCT）克服了电磁式电流互感器在暂态响应方面的弱点，满足现代电力系统对电流值实时精确测量的需求。为保证挂网使用时系统动态特性稳定符合使用要求，对光纤电流互感器的动态特性进行实验研究。根据光纤电流互感器原理建立动态模型并推导出传递函数，评估FOCT的动态特性；进一步分析该动态模型中几个重要参数与闭环带宽的关系，通过实验验证了系统闭环带宽与延迟光缆长度成反比，与前向通道增益成正比。并且与影响前向通道增益的主要参数：增益调节系数、干涉光强、和采样点数同样成正比。为了光纤电流互感器在设计和实际使用中保证一定的动态性能，在延迟光缆长度的选取、对影响系统前向通道增益各参数的选择等方面，提供了理论基础和参考依据。 |
| 关键词: 光纤电流互感器 动态特性 实验研究 闭环带宽 参数影响 |
| DOI：10.7667/j.issn.1674-3415.2014.03.002 |
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| Experimental research on dynamic characteristics of fiber optical current transformer |
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WANG Xia-xiao1, WANG Ye1, WANG Xi-chen1, WANG Ai-min2, PENG Zhi-qiang2
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1.State Key Laboratory on Inertial Science and Technology, Beihang University, Beijing 100191, China;2.Hong Feng Control Company Limited of San Jiang Astronautics, Xiaogan 432000, China
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| Abstract: |
| Fiber optic current transducer (FOCT) overcomes the weakness of electromagnetic current transducer in transient current response and meets the demands of accurate current measurement of modern power system in real-time. Experimental research on FOCT’s dynamic character is done to ensure the system dynamic characteristics meet the practical requirements. A dynamic model is established based on the working principle of FOCT, and its transfer function is also deduced, so that the dynamic characteristics of FOCT can be evaluated. Furthermore, the relationship between several important parameters in the dynamic model and the closed-loop bandwidth is analyzed; the experiment result shows that system bandwidth is inversely proportional to the length of delay fiber optic cable and proportional to the gain of forward channel. And the bandwidth is proportional to important parameters of the gain of forward channel, such as gain adjustment coefficient, interference intensity, and sampling numbers. In order to guarantee the dynamic performance in the FOCT’s designing and using, theoretical basis and reference are provided in the choice of length of delay fiber optic cable and the parameters of the gain in forward channel. |
| Key words: fiber optical current transformer (FOCT) dynamic character experimental research closed-loop width parameter influence |
