核电数字化仪控用光耦器件寿期预测建模与试验研究  

Lifetime Prediction Modeling and Experimental Study of the Optocoupler in the Digital I&C System of Nuclear Power Plant

作　　者：汪绩宁 王玉贵 徐冬苓 WANG Jining;WANG Yugui;XU Dongling(Nuclear Power Operation Research Institute,Shanghai 200120,China)

机构地区：[1]核电运行研究(上海)有限公司,上海200120

出　　处：《中国核电》2024年第4期520-524,共5页China Nuclear Power

摘　　要：为解决传统的核电仪控用光耦器件老化研究中无法定量评价光耦器件的正向电流传输比(CTR)衰减程度的问题,提出了一种光耦器件的CTR与热应力、工作时间之间定量函数关系的测试与建模方法。首先设计了光耦器件的老化试验装置,并对光耦器件执行热老化试验,监测并记录了光耦器件的CTR衰减情况。在仿真软件中对试验数据进行指数拟合,并校验拟合函数的正确性,最后得到光耦工作温度下的工作时间与输出电流之间的定量变化关系,确定了光耦的热老化模型。结果显示老化模型与试验数据吻合较好。In order to solve the problem that the attenuation degree of the forward current transfer ratio(CTR)of the optocoupler cannot be quantitatively evaluated in the traditional study on aging of optocoupler devices,a quantitative functional relationship between the CTR,thermal stress and working time of optocoupler devices is proposed.Firstly,the aging test device of the optocoupler is designed,and the thermal aging test is performed on the optocoupler,and the CTR attenuation of the optocoupler is monitored and recorded.In the simulation software,the test data are fitted exponentially,and the correctness of the fitting function is checked.Finally,the quantitative relationship between the working time and the output current at the operating temperature of the optocouple is obtained,and the thermal aging model of the optocouple is obtained.The results show that the aging model is in good agreement with the experimental data.

关 键 词：核电 光耦 老化试验 寿期预测 

分 类 号：TM623[电气工程—电力系统及自动化]