Electromagnetic Interference from DC/DC Converter of Photovoltaic System

Abstract

This paper is focused on electromagnetic interference from DC/DC converter of photovoltaic system for home application. This converter produces disturbances in a wide frequency range. According to international standard CISPR 11, the frequency range for disturbance measurement could be divided to two sub-ranges (150 kHz – 30 MHz and above 30 MHz). All parts of the DC/DC converter is non-ideal and its have a parasitic parameters (especially passive components like an inductor and capacitor). These parasites often show unpredictable interference that is not easy to suppress. The simulation results of a buck converter are presented in the paper and the question about measurement correctness of the radiated emission of this device type according to the relevant standard is asked.