ANALYSIS AND MITIGATION OF HARMONICS IN MEDICAL FIELD

Abstract

Among the various factors which causes poor power quality problems, harmonics are important one and
Harmonics play significant role in deteriorating power quality, called harmonic distortion. Harmonic distortion in
electric distribution system is mainly caused by the use of nonlinear loads. The rapid developments and use of nonlinear
load leads to voltage and current harmonics, the controlling technique is important over the harmonic. Both passive and
active filters have been used near harmonic producing loads or at the point of common coupling to block current
harmonics. For harmonic compensation at medium/high voltage level Passive filters still dominate, whereas for
low/medium voltage ratings active filters have been proclaimed. This paper presents an efficient model to compensate the
current harmonics using the inverter based Active Power Filter, Passive Power Filter, and the combination of both. The
system studies are carried for a medical center. The power flow studies are carried out to determine the data required to
design the Capacitor banks The Medical Centre is analyzed for the harmonics through harmonic analysis based on
which Active filters are designed. The study is conducted on Electromagnetic Transients Analysis Program (ETAP 12.6)