Grid-Interfacing Converter Systems With Enhanced Voltage Quality for Microgrid Application-Concept and Implementation

Grid-interfacing converter systems with enhanced voltage quality are proposed for microgrid applications in this paper. By adapting the conventional series-parallel structure, a group of grid-interfacing system topologies are proposed for the purpose of interfacing local generation/microgrid to the...

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Veröffentlicht in:IEEE transactions on power electronics 2011-12, Vol.26 (12), p.3501-3513
Hauptverfasser: Wang, Fei, Duarte, Jorge L., Hendrix, Marcel A. M.
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creator Wang, Fei
Duarte, Jorge L.
Hendrix, Marcel A. M.
description Grid-interfacing converter systems with enhanced voltage quality are proposed for microgrid applications in this paper. By adapting the conventional series-parallel structure, a group of grid-interfacing system topologies are proposed for the purpose of interfacing local generation/microgrid to the grid, or interconnecting microgrids. The functionality of the proposed systems is also reconfigured in order to ease the control design and to improve overall system performance, differing from existing series-parallel structure-based systems. Experiments with a concrete laboratory system are given to detail the proposed concepts and to demonstrate the practical implementations. Two three-phase four-leg inverters, together with dc microsources and nonlinear loads, are employed to construct a general series-parallel grid-interfacing system. Through the introduction of multilevel control objectives, it is illustrated that the proposed system could ride through voltage disturbances and continue the power transfer between the local generation and the grid, while a high-quality voltage is maintained for the local loads. The system also shows the possibility to achieve auxiliary functions such as voltage unbalance correction and harmonic current compensation. The main design aspects of the controllers are specified, and the entire system is effectively validated on a laboratory setup.
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subjects Applied sciences
Compensation
Control systems
Converters
Convertors
Design engineering
Distributed generation
Electric currents
Electric potential
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Electricity generation
Electronics
Energy storage
Exact sciences and technology
grid-interfacing
Harmonic analysis
Inverters
microgrid
Miscellaneous
Operation. Load control. Reliability
Power networks and lines
Power quality
Regulation and control
smart grid
Smart grids
Topology
Voltage
Voltage control
voltage quality
title Grid-Interfacing Converter Systems With Enhanced Voltage Quality for Microgrid Application-Concept and Implementation
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