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.
