Corona Onset Models: A Computational and Experimental Evaluation

The paper investigates corona onset models proposed in the literature. Initially, the models and their limits of application are discussed. Different factors such as the electric field (E-field) distribution around the electrodes and their surface conditions are taken into account. The models are then numerically and experimentally evaluated for different point-plane arrangements. The results show good agreement for situations where highly non-uniform fields occur. Additionally, a model based on the Field Efficiency Factor (FEF) is also analyzed. An adjustment at the FEF, based on the experimental results, is proposed.