摘要
随着输变电线路的电压和电流等级的不断提高,传统的基于电磁原理的电流互感器已经不能满足实际测量的需要。因此,提出了一种基于电流热效应的新型光纤电流传感器的设计方案:通过带气隙的铁芯互感器把高压侧的大电流,转化为低压侧的小电流,再把此电流信号加载到电热器件上,通过对电热器件的温升测量达到间接测量电流的目的。研究了电热器件-薄膜电阻的热稳定性,根据薄膜电阻的结构和实际的测试条件,利用有限元软件ANSYS建立了薄膜电阻的三维模型,并对其进行了热分析,得到了装置的温度场分布。
As the improving of the grade of voltage and current in the power transmission lines, the traditional method that based on the electromagnetism principle already could not satisfy the need of practice. Therefore, a new method of optical fiber current sensor that based on current heat effect is presented in this paper. The high current in high voltage side is transformed low current in low voltage side by iron core coil with airspace. The low current outputted from the coil is loaded on the electric heating component. Then the current information is got indirectly by measuring the temperature signal. Heat stability of film resistance is analyzed. Three-dimensional model of thin film resistance is built and thermal analysis is performed according to their structure and test conditions by utilizing ANSYS. The temperature distribution of device is obtained.
出处
《微计算机信息》
北大核心
2008年第28期230-231,174,共3页
Control & Automation
基金
辽宁省自然科学基金资助课题(20052044)项目名称:光线高压大电流测量技术的研究
关键词
光纤
荧光
电流传感器
薄膜电阻
热分析
Optical-fiber
Fluorescence
Current sensor
Film resistance
Thermal analysis
