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A key element at the grid side of future smart power systems is the inverter. This paper introduces a robust hierarchical control strategy for realistic distributed power system with power electronics inverters as front-end. The proposed control architecture maintains the three phase voltages and frequency in the grid within limits and provides power sharing between the units according to their rating and user settings. The proposed system philosophy is totally flexible in that the developed control and management functions do not depend on the types, sizes, or numbers of the used energy conversion systems. The proposed system philosophy is also compatible with conventional grids. Therefore, the potential application areas of the proposed philosophy cover not only remote and rural electrification where stand-alone systems are required, but also distributed generation where interconnection to conventional grids is preferred.
Date of Conference: 15-18 March 2009