在变压器油中同时进行溶解气体分析,采用时间分割多重复合石英增强光声谱学.
Jialiang Dai1,2, Yixin Zhang1,2, Jiapeng Wang1,2
1State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China.
Analytical chemistry
|February 2, 2026
概括
这项研究引入了一种新的石英增强光声谱学 (QEPAS) 系统,用于同时检测变压器油中的乙和甲. 该系统具有高灵敏度和低样本体积,可提前检测故障.
科学领域:
- 电气工程 电气工程
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 溶气分析 (DGA) 对于诊断浸油变压器故障至关重要.
- 乙 (C2H2) 和甲 (CH4) 是用于变压器故障识别的关键指标气体.
- 目前的DGA方法可能需要更大的样本量,并且缺乏实时监控能力.
研究的目的:
- 开发和演示一个时间分割多重复合石英增强的光声谱学 (QEPAS) 传感系统.
- 为了实现在变压器油中同时和灵敏地检测溶解的乙 (C2H2) 和甲 (CH4).
- 为了实时监测和分析减少样本体积的溶解气体.
主要方法:
- 采用了时间划分多重复合的QEPAS传感系统,采用在线光束配置.
- 集成头部空间脱气与QEPAS进行实时分析.
- 对C2H2和CH4.4进行测量的最小检测极限 (MDLs).
主要成果:
- 达到C2H2的MDL约为15ppb,CH4的MDL为0.3ppm,远低于行业安全值.
- 由于在线光束配置,信号幅度增强了20倍.
- 该系统需要~1.6毫升的最小气体电池体积,减少油样品消耗.
结论:
- 开发的QEPAS系统为DGA提供了高灵敏度,快速响应和低样本消耗.
- 它为早期检测变压器故障提供了一种可行和有效的方法.
- 这项工作为在变压器监控中溶解气体分析中应用QEPAS奠定了基础.
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