摘要
变压器的在线监测技术是全球能源互联网建设的重要保障,而变压器油中溶解气体的诊断被视为变压器故障的有效判据。采用密度泛函理论方法模拟了6种油中溶解气体在铂修饰的C3N纳米薄片的吸附过程,通过能带结构、态密度、差分电荷密度的计算揭示相关的吸附和传感机理。结果表明铂修饰可以显著增强C3N纳米薄片的气敏响应能力,尤其是对CO和C_(2)H_(2)的捕捉能力,这主要归因于掺杂金属颗粒的d轨道电子层贡献。铂修饰C3N纳米薄片对变压器油中溶解气体的吸附能力排序为CO>C_(2)H_(2)>C_(2)H_(4)>H_(2)>CO_(2)>CH_(4)。吸附底物的电子特性发生较大变化。该研究为开发用于检测变压器油中溶解气体的高性能气敏传感器提供了理论基础。
The online monitoring technology of transformers is a crucial guarantee for the construction of global energy internet,and the diagnosis of dissolved gases in transformer oil is considered an effective criterion for transformer faults.The adsorption process of six dissolved gases on C_(3)N nanosheets modified with Pt is simulated using density functional theory method.The study reveals the relevant adsorption and sensing mechanisms through calculations of band structure,density of states,differential charge density.The results indicate that Pt modification significantly enhances the gas-sensing response of C_(3)N nanosheets,especially in capturing CO and C_(2)H_(2) gases.This enhancement is primarily attributed to the contribution of the d orbital electrons of doped metal particle.The adsorption capacity of Pt-modified C_(3)N nanosheets for dissolved gases in transformer oil is ranked as:CO>C_(2)H_(2)>C_(2)H_(4)>H_(2)>CO_(2)>CH_(4).And the electronic properties of the adsorption substrate change significantly.This work provides a theoretical basis for the experimental development of high-performance gas-sensing sensors for detecting dissolved gases in transformer oil.
作者
贾东明
韩晓昆
董翔
衣书伟
郭祥阳
JIA Dongming;HAN Xiaokun;DONG Xiang;YI Shuwei;GUO Xiangyang(State Grid Beijing Power Maintenance Company,Beijing 100073,China;College of Electrical and New Energy,China Three Gorges University,Yichang 443000,China)
出处
《智慧电力》
北大核心
2024年第4期40-46,61,共8页
Smart Power
基金
国家自然科学基金资助项目(52107108)。
作者简介
贾东明(1988),男,河南邢台人,硕士研究生,工程师,从事检测试验、设备故障分析工作。
