Abstract:

In unattended substations, as power transformer serves as common and major equipment, its operation status should be monitored at all times, and corresponding alarms should be triggered when abnormal situations occur. A detection method for transformer oil leakage based on color feature was presented, in which abnormal area could be detected through difference method, and its H-S Color Histogram could be analyzed. When the tawny part of images before and after changed much, it could be determined that oil leaks abnormally. The experimental results show that this method is easy to carry out, the accurate detection of transformers oil leakage, and it can also well eliminate the influence of shadows on testing.

Key words: power transformer, color feature, transformer oil leakage, difference method, abnormal area