Design of On-line Monitoring Device for C₂H₂ in Transformer Oil Based on TDLAS

With the continuous development of the power industry, the safety and stability of transformers are becoming increasingly important. In order to meet the needs of online monitoring of C₂H₂ in transformer oil, a 1532 nm distributed semiconductor laser and a 12 m optical path White cell were selected to develop an online monitoring device for C₂H₂ in transformer oil based on tunable diode laser absorption spectroscopy and wavelength modulation technology. It has achieved functions such as separation of dissolved C₂H₂ in oil, gas detection, and result analysis. The measurement cycle is about 25 minutes, and the testing process involves non-destructive samples. The device detects accurately and quickly, without the need for manual operation, and can provide real-time safety reference opinions for transformers.