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A Research on DC Voltage Offsets Generated by PWM-Controlled Inverters

Authors: Marios N. Moschakis


The increasing penetration of Distributed Generation and storage connected to the distribution network via PWM converters increases the possibility of a DC-component (offset) in voltage or current flowing into the grid. This occurs when even harmonics are present in the network voltage. DC-components can affect the operation and safety of several grid components. Therefore, an investigation of the way they are produced is important in order to take appropriate measures for their elimination. Further research on DC-components that appear on output voltage of converters is performed for different parameters of PWM technique and characteristics of even harmonics.

Keywords: Power Quality, Distributed Generation, Electric Machine Drive Systems, Asymmetric even harmonics, DC-offsets

Digital Object Identifier (DOI):

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