Performance Tests on Temperature-Press Composite MEMS Sensor for Transformer Oil

Power transformer is a crucial piece of electrical equipment in power grid. In the digitalization process of power grid, rapid and effective monitoring technologies for power transformers are always a research hotspot. Optical sensor is passive and highly resistant to anti-interference, which is very suitable for high voltage and high electromagnetic environment. In this paper, the performances of a temperature-press composite optical sensor made by Micro-Electro-Mechanical System (MEMS) technology are tested for monitoring transformer oil status. The test results show that the composite optical sensor presents a satisfied measurement linearity, and the temperature-press composite MEMS sensor has long-term stability.