Investigation of Harmonic Resonance from Reactive Compensation in Hospital Electrical Installations with Magnetic Resonance Imaging (MRI)

Abstract

With the advent of outbreaks, health waves, and the advancement of electromedical equipment technology, the concern with the power quality in electrical installations has gained greater attention to the perfect performance of medical equipment. However, effective techniques have been developed that allow the necessary technical requirements to ensure compliance with these facilities. The study investigates the harmonic resonance frequency from reactive power compensation through banks of automatic capacitors applied in an electrical circuit consisting of imaging magnetic resonance (MRI) equipment. Methodologically, the concepts of reactive compensation with comparations to IEC60831-1 are applied for the current of circulating work in capacitors, above 30% of the nominal and the mitigation of the system's harmonics with implementation ant-resonant filter. However, after compensating the power factor penalty, there was a need for filter dimensioning due to the emergence of harmonic resonances. Thus, for a correct dimensioning of compensations, the concern with harmonics and their consequences are of paramount importance. © 2022 IEEE.