For both offline planning and online operation of smart grids, the distribution system operator (DSO) and/or the aggregator will be faced with the challenge of dispatching a large number of controllable resources of different types i.e. intermittent renewable energy supplies (RES), dispatchable micro sources, storage units and demand side management loads. This paper presents a grid and a market agent hosting the tasks of virtual power plant (VPP) operators, retailers, aggregators, DSO, energy brokers and any emerging role or actor in the smart grid. On the one hand, an extension of the distribution system operation via the grid agent will be presented, and on the other hand, a novel ICT infrastructure facilitating the aggregation mechanisms will be described Finally, various technical issues regarding the development of such a model will be presented and the advantages of the approach chosen will be assessed

The increasing installation of decentralized generators at the low voltage level is rendered difficult through the lack of monitoring and control possibilities at this level. The operation of distribution grids therefore needs to be extended in order to include this grid section. This paper presents a new control strategy based on agents which allows for the decentralized and coordinated management of generators, storage and loads. To implement this strategy, this work introduces distributed automation algorithms which are studied using the electric grid simulation software DIgSILENT Power Factory extended with an external Java/C++ development interface. The algorithms are developed and tested using a steady-state distributed simulation, and first results thereof are presented

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