摘要
全光纤电流互感器(FOCT)温度误差的主要来源是λ/4波片引起的温度误差和传感光纤维尔德常数引起的温度误差。通过综合分析环境温度对λ/4波片和维尔德常数的影响,推导出了总的温度误差与λ/4波片引起的温度误差和维尔德常数引起的温度误差之间的关系,利用曲线拟合的方法得到了λ/4波片相位延迟角初始值的合理取值为86°,搭建了FOCT温度误差测试系统对理论分析结果进行了试验验证。理论分析结果和试验测试结果都表明当λ/4波片的初始相位延迟角为86°时,在绝大部分温度变化范围内电流测量值的相对误差都小于0.2%的误差极限,实现了FOCT的温度误差补偿。
The main source of all fiber optical current transformer temperature error is caused by λ/4wave-plate tem- perature error and the sensing fiber Verdet constant temperature error, this paper analyzes the relationship of the total temperature error, the λ/4 wave-plate temperature error and the sensing fiber Verdet constant temperature error, and derives the mathematical expression of them, and the curve fitting method is used to verify that the λ/4 waveplate ini- tial phase delay angle is 86° ; the theoretical analysis results are verified by the test system of FOCT temperature error. The theoretical analysis results and test resialts show that when the λ/4 waveplate initial phase delay angle is 86°, in the vast most of the temperature range the relative value of the error is less than 0.2%, which realizes compensation for temperature error.
出处
《电测与仪表》
北大核心
2017年第7期16-21,共6页
Electrical Measurement & Instrumentation
基金
北方工业大学优秀青年基金(XN072-018)
北方工业大学启动基金:经济型纯光电流互感器研究与制作
