| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 724232 | Journal of Electrostatics | 2015 | 9 Pages |
•The effect of a layer of dielectric placed on the surface of ground electrode on Corona discharges were investigated.•A FEM-based numerical model was developed to study the surface charge decay process.•The surface charge decay may follow different mechanisms depending on the applied stress.
The decay of surface charges deposited on the dielectric material by the partial discharge (PD) activity has a great impact on the repetition of partial discharges. In this work, the effect of dielectric placed on the surface of ground electrode in a needle-plane configuration on the discharge activity was investigated, with the application of a periodic negative step voltage. The charge decay mechanisms on a corona charged dielectric surface were investigated based on a comparison between experiments and a FEM-based numerical model. The comparison indicates that the surface charges may decay due to different mechanisms depending on the applied stress.
