摘要
首先分析了法拉第光学直流电流互感器的信噪频带重叠现象及低频噪声的影响,提出了直流光学传感频谱迁移测量法,推导了光学调制和信号解调方法的数学模型。其次设计了直流光学传感频谱迁移测量法的实现方案。最后对所设计的直流光学电流测量系统进行了误差分析及特性试验。实验结果表明,该测量系统具有较高的测量精度,能够消除信噪重叠现象,证明了该方法的实用性。
Firstly, the phenomenon of signal noise frequency band overlapping and the effect of low frequency noise in the direct current optical transducer are analyzed. The direct current optical sensing spectrum shifting measurement method is presented, and the mathematical model of optical modulation and signal demodulation is developed. Secondly, the realization of direct current optical sensing spectrum shifting measurement method is designed. Finally, the error analysis and characteristic test are finished in the direct current optical transducer. The test results show that the proposed measurement system has high accuracy of direct current measurement, and can eliminate the signal noise frequency band overlapping phenomenon. The practicality of the proposed method is thus proven.
出处
《电力系统自动化》
EI
CSCD
北大核心
2012年第15期96-100,共5页
Automation of Electric Power Systems
基金
国家科技支撑计划重大项目(2011BAG02B14)
国家高技术研究发展计划(863计划)资助项目(2011AA05A109)
已获得实用新型专利(ZL201120107778.4)~~
关键词
光学电流互感器
光学传感
频谱迁移
法拉第磁光效应
直流电流测量
调制
解调
optical current transformer
optical sensing
spectrum shifting
Faraday magneto-optical effect
direct current measurement
modulation
demodulation
