Optimizing the Efficiency of Non-Uniform Electric Field Systems Under AC Voltage and a contaminating environnement

The basic concept of this research work concerns the mathematical study of the distribution of field lines for a configuration of point-plane electrodes protected by a glass barrier. Using COMSOL Multiphysics software for this simulation. This one aims to improve the understanding and predict the electric field behavior in a system where the electrode geometry creates a non-uniform field.To validate the simulation results, an experimental study was conducted in the High Voltage laboratory. The aim of this study is to evaluate the electrical performance of the system which is put under extremely severe pollution conditions. an AC voltage of 50 Hz has been applied to this system. Experimental testing compares simulation data with real results, thus ensuring the reliability of the conclusions drawn.An experimental device was designed to allow the simultaneous variation of the inter-electrode distance. This device is composed of two supports nested within each other. This innovative design enables easy adjustment of the distance between the electrodes without needing to rebuild the entire system for each modification.Disruption tests of the air gap in this system, especially in the presence of heavily polluted barriers, were conducted to evaluate the device’s performance and robustness. These trials were supported by precise visualization of the electrical ionization channel, clearly identifying the critical areas where discharges occur.The results demonstrated a perfect equivalence between experimental observations and numerical simulations. This strong correlation validates the methodological approach used and confirms the reliability of the results obtained through simulation.Furthermore, it was found that using considerably long tubular barriers significantly improves the system’s performance. These tubular barriers contribute to a better electrical field distribution, thereby reducing the pre-discharges risk.