摘要
运行稳定性是评价光学电流互感器性能的重要指标之一。推导了线性双折射影响下磁光式光学电流互感器输出光强的数学模型,定义了静态工作光强。对现场运行数据进行了挖掘,得到静态工作光强的时间序列。引入相关性分析的理论,通过对静态工作光强与环境温度的互相关系数的计算,分析了环境温度对光学电流互感器运行稳定性的影响程度,分析结果表明:静态工作光强与环境温度的大小及变化率强相关;环境温度对静态工作光强的作用具有延时性。提出了光强长期温度特性的概念,并在此基础上,提出了光学电流互感器运行稳定性的评判原则。
The operating stability is one of the important indices for evaluating the performance of optical current transformer. The mathematical light intensity models of magneto- optical current transformer are deduced based on the effects of linear birefringence and the static state operating light intensity is defined as well. The time series of static state operating light intensity is obtained by field data mining. The correlation analysis theory is introduced and the effect of ambient temperature on the operating stability of optical current transformer is analyzed by calculating the cross correlation coefficient between them. The analytical results show that,the static state operating light intensity is greatly related to the ambient temperature and the effect of ambient temperature has time-lag on the static state operating light intensity. The long-term temperature characteristic of light intensity is proposed,based on which the evaluation criterion for the operating stability of optical current transformer is proposed.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第10期38-43,共6页
Electric Power Automation Equipment
关键词
光学电流互感器
光强
运行稳定性
线性双折射
optical current transformer
light intensity
operating stability
linear birefringence
