| 引用本文: | 王红星,关远鹏,胡春潮,冯善强.全光纤电流互感器温度误差研究[J].电力自动化设备,2017,37(12): |
| WANG Hongxing,GUAN Yuanpeng,HU Chunchao,FENG Shanqiang.Temperature error of fiber optic current transformer[J].Electric Power Automation Equipment,2017,37(12): |
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| 摘要: |
| 温度是影响全光纤电流互感器(FOCT)输出稳定性和长期稳定运行的主要因素之一。针对FOCT的温度误差问题，根据光纤中的相位延迟，结合FOCT的反射式Sagnac光路结构的互易性，提出了FOCT的温度误差数学模型，指出FOCT的温度误差不仅与温度偏移量相关，还与温度在某温度下的变化率相关。通过试验和仿真对该FOCT温度误差数学模型进行验证：在试验温度范围中，温度的偏移量绝对值与比差绝对值近似线性相关，并且温度变化率较大时，比差绝对值也相对较大。最后，通过温度拟合曲线补偿，使FOCT温度误差满足0.2级准确度的要求。 |
| 关键词: 全光纤电流互感器 温度误差 反射式Sagnac光路结构 互易性 温度拟合曲线 |
| DOI：10.16081/j.issn.1006-6047.2017.12.028 |
| 分类号:TM452+.94 |
| 基金项目:国家自然科学基金资助项目(51577074) |
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| Temperature error of fiber optic current transformer |
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WANG Hongxing, GUAN Yuanpeng, HU Chunchao, FENG Shanqiang
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Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080, China
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| Abstract: |
| Temperature is one of the key factors that affect the output stability and long-time stable operation of FOCT(Fiber Optic Current Transformer). Aiming at the required accurate temperature of FOCT, a FOCT temperature error mathematical model is proposed according to the phase delay in fibers and combined with the reciprocity of FOCT’s reflective Sagnac structure. Also, it is pointed out that the FOCT temperature error relates to not only the offset of temperature but also the variance ratio at a temperature point. The FOCT temperature error mathematical model is verified by simulations and tests, which shows that the relationship between the absolute value of the temperature off set and that of rate error is approximately linear. Furthermore, the absolute value of rate error will be relatively larger if the variance ratio is larger. Finally, through the compensation of the temperature fitting curve, the FOCT temperature error satisfies the requirement of 0.2 class accuracy. |
| Key words: fiber optic current transformer temperature error reflective Sagnac optic structure reciprocity temperature fitting curve |
