Research on advanced anti — Interference measures in ground wave detection technology

摘要

When the PD occurs, the charge moves rapidly, producing high-frequency currents while also radiating electromagnetic waves. While the switchgear is a metal closed structure, but also make a partial discharge signal to produce multiple reflections. Usually there is a gap in the surface of the switchgear, electromagnetic waves can leak through the gap to continue in the air and switch cabinet surface propagation. TEV detection is based on this principle. However, when there is interference outside, the interference of electromagnetic waves can also be coupled to the switchgear surface, affecting the partial discharge pulse of the correct assessment. Based on this, the project uses the finite element method to study the propagation characteristics of the electromagnetic wave on the surface and the gap of the switchgear, and provides theoretical guidance for the research on the anti-jamming measures of the partial discharge detection of the switchgear.