Shielding Analysis of High Voltage Engineering Laboratory NUST /

Abstract

In today's technological advancements, Electromagnetic Interference (EMI) in High Voltage (HV) Laboratories is extremely important, especially for sensitive Partial Discharge (PD) measurements. To avoid electromagnetic interference during partial discharge studies, the laboratory must be shielded for accurate measurements and findings. There are several techniques used for shielding to avoid noise during PD measurements, but all the techniques are very expensive and complex. To develop a low-cost practical solution for denoising sensitive PD measurements two portable prototype models of shielding enclosures based on the operating principle of Faraday Cages are fabricated and used in this research. A comparative analysis of both portable cages was done and the effect of the cage's material on its denoising performance was observed. Practical experimentation yielded effective average noise reduction up to 0.5 pC for 1 kV by thin aluminum foil cage and the ways to further improve the denoising capability are also suggested.