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This paper presents experimental results from the hardware implementation of a power conversion system (PCS), and its islanding control and detection algorithms, for a distributed generation (DG) unit's interface to the utility grid. The control and detection schemes implemented are shown in simulations to be stable and effective. The algorithms allow for not only transient control between modes of operation (grid-connected to stand-alone, islanding, modes) but for the elimination of nondetection zones (NDZ) and the autonomous operation of the PCS from the grid. The simulations show that the concepts of the algorithms are feasible, while the hardware implementation, via power electronics building blocks (PEBBs), shows the results that validate them.
Date of Conference: 19-23 March 2006