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Auflistung nach Autor:in "Dethlefs, Tim"

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  • Konferenzbeitrag
    A consumer-orientated Architecture for distributed Demand-Side-Optimization
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Dethlefs, Tim; Beewen, Dirk; Preisler, Thomas; Wolfgang, Renz
    Demand-Side-Management (DSM) is one of the key applications in the future smart grid, creating a new degree of control in order to reduce losses and fluctuations caused by volatile distributed energy resources (DERs). To integrate the consumer side, several approaches like flexible tariffs, have been proposed and tested. However, many of these approaches not have been adopted widely yet because of the needed sophisticated (and often expensive) command and control infrastructures or their impact on the user comfort. In this paper an architectural approach for a lightweight demand-side-application will be proposed. Utilizing methods of peer-to-peer (p2p) networks and abstraction patterns the architecture will be enabling consumers to form spontaneous demand-side optimization networks in order to optimize their load and to provide energy services to the Smart Grid of the future. Because of the decentralized characteristic of the architecture, the aggregation instance does not need detailed information of the optimization network, while the approach is scalable.
  • Zeitschriftenartikel
    A novel approach on the provision of distributed energy resource capabilities
    (it - Information Technology: Vol. 59, No. 5, 2017) Dethlefs, Tim
    The increasing dissemination of Distributed Energy Resources (DER) will have a significant impact on the planning and operation of the electricity grid. Many of these DERs have operational constraints e.g. weather conditions or self-sufficiency of resources or interactions within a multimodal environment. Today, established concepts on Virtual Power Plants aggregation often lack the possibility of automated, standardized and near real-time reconfiguration in case of failures or planning issues with these volatile DERs. In spite of standardization approaches a standardized description model for energy resources and their capabilities which allows aggregators to automatically find contributing or substituting DERs is lacking. The recent development in the electricity grid towards increasing Information and Communication capabilities can be used for a large scale information and allocation system for energy resources. Such a registry for energy resource capabilities will provide the opportunity for DERs to promote actual information about their capabilities based on forecasts and operational plans. Aggregators can select appropriate resources for their VPP configuration and reconfiguration while system operators can e.g. observe the grid status and the allocated capacities of all active DERs registered at the registry. In order to achieve the goals and to optimize the usage of especially renewable DERs, three main research question have to be addressed: (1) The definition of a standardized, abstracted and generalized description model for DER capabilities. (2) The interoperability and communicational requirements for such energy services. (3) Identifying the current applications and potential contributions to the development of future energy markets.
  • Konferenzbeitrag
    Scalable Integration of 4GL-Models and Algorithms for massive Smart Grid Simulations and Applications
    (Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Preisler, Thomas; Balthasar, Gregor; Dethlefs, Tim; Renz, Wolfgang
    This paper presents a scalable integration approach for algorithms and models written in fourth generation (programming) languages for massive Smart Grid simulations as well as applications. While fourth generation languages (4GL) focus on rapid application development and the reduction of lines of code, they lack of integration and scalability features. Nevertheless, they are widely spread and often used by engineers. The scalable integration of such elements is achieved in this paper by wrapping the 4GL-models and algorithms with established web technologies like RESTful web services and load balancing. The provision of a seamless integration concept allows engineers to focus on rapid application development and liberates them from integration efforts.