An Optical Measurement Method for Electrostatic Sensing Based on Fabry-Perot Interference Mechanism

Optical electrostatic sensors play an essential function in the development of digitalization and intelligence of power systems due to their passive, anti-electromagnetic interference, and fast response speeds. However, the performance of optical electrostatic sensors is affected by the collector size. In this paper, the dynamic output characteristics of fiber optic electrostatic sensors with different collector sizes are tested. Meanwhile, models of different sizes of collectors are also constructed and simulated and analyzed. The results show that the sensitivity of the sensor increases with the increase of the collector area. The sensitivity of the sensor with a 5 cm radius collector is 53.1 pm/kV. This study provides meaningful insights for the design and optimization of electrostatic sensors.