A Fast Low Cost and Portable Transformer Oil Dissolved Gas Analyzer Research and Development and Application

The composition and content of dissolved gases in transformer oil are key indicators for evaluating the operating status of transformers and diagnosing potential faults. However, traditional dissolved gas analyzers for transformer oil have drawbacks such as large equipment, complex operation, long analysis time and high price, which are difficult to meet the demand for on-site rapid detection. In response to this situation, this paper has developed a rapid and portable dissolved gas analyzer in transformer oil. This analyzer is based on advanced sensor technology and optimized data processing algorithms, integrating three major modules: gas separation, detection and data analysis. In the gas separation stage, the analyzer adopts the vacuum degassing method (Ding et al. 2011). The detection module employs a combination of highly sensitive electrochemical sensors and semiconductor sensors to ensure precise detection of each gas component (Shi 2023). Data processing conducts real-time processing and analysis of sensor signals through algorithm models, which can quickly provide suggestions for gas content and fault diagnosis. The experimental results show that this portable analyzer is comparable to large-scale laboratory equipment in terms of detection accuracy, and the detection error for major gases is controlled within ±5%. Meanwhile, its detection speed has been significantly improved, and the time for a single detection has been shortened from several hours in traditional methods to within 15 min. In addition, this instrument is compact in size and light in weight, making it easy to carry to the site for real-time detection. This not only effectively enhances the operation and maintenance efficiency of power equipment, but also reduces operation and maintenance costs, providing a strong guarantee for the safe and stable operation of the power system.