Harmonic current filtering and resonance damping have become important concerns on the control of an islanded microgrids. To address these challenges, this paper proposes a control method of inverter-interfaced Distributed Generation (DG) units, which can autonomously share harmonic currents and resonance damping burdens. The approach employs a load compensator based on the decomposition of output current, in addition to the outer droop-based power controller, as well as inner voltage and current controllers. The load compensator consists of a virtual fundamental impedance loop for enhanced sharing of reactive power, and a variable harmonic impedance loop which allows to counteract harmonic voltage drops across the grid-side inductance of the DG inverter, and to damp the harmonic resonance propagation throughout a distribution feeder. Experiments on a three-phase microgrid are performed to validate the performance of the proposed control scheme.
|Titel||Proceedings of the IEEE Energy Conversion Congress and Exposition 2012|
|Status||Udgivet - 2012|
|Begivenhed||the Fourth IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh Convention Center, Raleigh, USA|
Varighed: 15 sep. 2012 → 20 sep. 2012
|Konference||the Fourth IEEE Energy Conversion Congress and Exposition, ECCE 2012|
|Lokation||Raleigh Convention Center|
|Periode||15/09/2012 → 20/09/2012|