Abstract
Growing popularity of renewable energy brings about negative effects for the power quality especially for harmonic levels of supply voltage. Voltage source inverters being inevitable for operation of renewable energy can produce significant amounts of current harmonics in power grids. This paper provides the analysis of current harmonic sources within the inverter and then introduces the Simulink model of three-phase inverter. Derived model defines the current harmonic levels of inverter in regard to the supply voltage distortion. The model validation is done by comparing the modeling results with measurement data. Finally, the analysis of frequency-dependent characteristics of voltage source inverter reveals factors with critical impact on current harmonic emission of inverter.
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