Methods for harmonic control in microgrids

Which control strategies are proposed to mitigate harmonics?

The control strategies proposed to mitigate harmonics are classified into three groups: primary, secondary, and tertiary. Furthermore, this overview draws a sketch on the global trends in harmonic mitigation methods of an ac microgrid directly applicable to today's smart grid applications. References is not available for this document. Need Help?

Are harmonic mitigation methods a hierarchical control strategy?

Hence, the main goal of this article is to clearly present a comprehensive review of harmonic mitigation methods from a hierarchical control viewpoint. The control strategies proposed to mitigate harmonics are classified into three groups: primary, secondary, and tertiary.

What are the global trends in harmonic mitigation methods of AC microgrid?

Furthermore, this overview draws a sketch on the global trends in harmonic mitigation methods of an ac microgrid directly applicable to today's smart grid applications. The microgrid concept has been emerged into the power system to provide reliable, renewable, and cheaper electricity for the rising global demand.

Why are voltage and current harmonics important in microgrids?

Voltage and current harmonics are an important power quality concern in single-phase microgrids. Harmonic distortion increases the power losses and may cause stability problems particularly in islanded microgrids. Current harmonics can be injected by the DG units due to poorly designed control loops.

Can centralized current-based control be used in low-voltage microgrids?

This paper discusses a centralized current-based control for distributed generators in low-voltage microgrids, capable of accurately sharing among the units the active, reactive, and harmonic current needs of the microgrid, without requiring knowledge of the network topology and parameters.

Can a single-phase microgrid improve power quality?

The comparison is performed with respect to the ability of the method/device in improving the following power quality issues when applied to single-phase microgrids: reduce/eliminate voltage and frequency fluctuations; reduce/eliminate the reactive power exchange between DG units, and reduce/eliminate the current and voltage harmonic distortions.