In recent years, the online monitoring technology for transformer oil has made significant progress, providing strong guarantees for the safe and stable operation of power equipment. By monitoring the key parameters of transformer oil in real-time, operation and maintenance personnel can timely grasp the operating status of transformers and detect potential fault hazards in advance.

In the ± 800 kV high-voltage direct current transmission project from Longdong to Shandong, which started live commissioning on March 23, the chemical environmental protection professional team of State Grid Gansu Electric Power Research Institute used gas chromatography to accurately detect dissolved gases in the insulation oil of the converter transformer. By analyzing changes in gas composition and content, potential faults such as partial discharge and overheating can be detected in advance, providing scientific basis for debugging decisions. The team strictly follows standard procedures to ensure sampling standards, accurate data, and timely analysis, providing first-hand information on equipment status for the debugging team.

At present, various advanced online monitoring technologies have been commercially applied. A real-time monitoring system based on sensors can continuously monitor parameters such as moisture content, acid value, and dissolved gas composition of transformer oil 24 hours a day, and transmit data in real-time to the monitoring center. The application of big data analysis and artificial intelligence diagnostic technology can deeply mine and analyze massive monitoring data, accurately judge equipment operating status, predict potential faults, and achieve early warning of faults.

The widespread application of these technologies not only helps to reduce the operation and maintenance costs of the power system, minimize power outage losses caused by equipment failures, but also ensures the safe and stable operation of the power grid, which is of great significance for ensuring the continuity of power supply. With the continuous development and improvement of technology, transformer oil online monitoring technology will play a more important role in the power industry, further enhancing the intelligent operation and maintenance level of power equipment.