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检索条件"机构=Advanced System Technology Branch of Fraunhofer IOSB"

共 31 条记录，以下是11-20 订阅

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Development of a manipulatorsystem with several integrated effectors for a small hybrid Remotely Operated Vehicle (ROV)

Development of a manipulatorsystem with several integrated e...

引用

OCEANS - Europe

作者： Martin Raeder Daniel Weber Helge Renkewitz Thomas Rauschenbach Tom Ströhla Thomas Sattel Insitute for Mechatronics Technical University of Ilmenau Ilmenau Germany Branch of Fraunhofer IOSB Advanced System Technology (AST) Ilmenau Germany

For small hybrid ROV's avoiding additional load during their mission is a crucial aspect. Especially if the task is an underwater manipulation for maintenance reasons. Therefore, it is important to choose suitable manipulators and at the same time to enable a variety of tasks for underwater manipulation. This paper presents an approach to use one manipulator with several effectors, which are interchangeable. The approach aims to guarantee an effective time cost operation as well as a universal usage of the manipulator system and at the same time to keep the overall weight at a certain level.

关键词： Manipulator dynamics Task analysis Wind power generation Actuators Underwater vehicles Maintenance engineering

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Challenges and opportunities for phasor data based event detection in transmission control centers under cyber security constraints

Challenges and opportunities for phasor data based event det...

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Power Tech Conference

作者： André Kummerow Dennis Rösch Cristian Monsalve Steffen Nicolai Peter Bretschneider Christoph Brosinsky Dirk Westermann Department of Energy Advanced System Technology Branch of Fraunhofer IOSB Ilmenau Germany Power Systems Group Technische Universität Ilmenau Ilmenau Ilmenau Germany

The scope of this survey is the phasor based event detection under cyber security constraints in modern transmission control centers. A general concept for a physical and cyber event detection is developed as a combination of state-of-the-art disturbance classification and cyber-attack detection methods. This requires the incorporation of heterogeneous data sources and advanced data fusion and analysis techniques. An enhanced and robust recognition of the current grid situation is proposed to distinguish between different scheduled and unscheduled grid events. Furthermore, Digital Twins are considered as new promising technology for control centers and potential benefits for physical and cyber event detection are described.

关键词： Power system dynamics IEC Standards Phasor measurement units Graphical user interfaces Indexes Steady-state Energy management

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Market Scenarios for Integration of Distribution system Operators within the Scheduling system

Market Scenarios for Integration of Distribution System Oper...

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International Conference on European Electricity Market, EEM

作者： Bjoern Illing Steffi Naumann Stefan Klaiber Oliver Warweg Fraunhofer IOSB - Advanced System Technology AST Ilmenau Germany

The integration of renewable energy generation into gross electricity consumption is a major target of the German government. This target causes a need of more flexibility within the energy market and the related market processes. Therefore new approaches for optimized operating strategies for a reliable electricity supply system have to be developed. The approach of the coordinated market and grid operation (CMGO) which was developed within the venture REGEES (REGenerative rEnewable Electricity system) represents such a new process to harmonize market and system interests. The influence of this approach on the energy market mostly depends on technical, economic and social conditions. These conditions are described by scenarios. This paper focusses on developing a methodology to design scenarios. This methodology is applied to a case study. Within the market model FENIA the influence on the market in terms of the spot market price of the year 2035 is calculated. Based on these prices an optimization model [2] is used to analyse the effect of the CMGO.

关键词： Adaptation models Load modeling Optimization Electricity supply industry Power generation Predictive models Task analysis

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Intraday charging restrictions for electric vehicles with consideration to grid capacities

Intraday charging restrictions for electric vehicles with co...

引用

IEEE International Energy Conference and Exhibition (EnergyCon)

作者： Therese Klarner Alexander Arnoldt Oliver Warweg Fraunhofer Advanced System Technology (AST) Branch of Fraunhofer IOSB Ilmenau Germany

ISBN: (纸本)9781467384643

The stability of the electrical infrastructures is challenged by the volatile feed in of renewable energy and non-stationary loads such as electric vehicles (EV). This work presents an approach for controlled charging of private consumers integrated in a control cascade. The approach has been validated by simulation, which bases on mathematical optimization, and furthermore within a field test.

关键词： Load modeling Optimization Schedules Vehicles Linear programming Feeds Mathematical model

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Sensitivity analysis of adiabatic compressed air energy storage

Sensitivity analysis of adiabatic compressed air energy stor...

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2016 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT Europe 2016

作者： Rublack, Liane Warweg, Oliver Bretschneider, Peter Freund, Sebastian Bieber, Mathilde Dept. Energy Advanced System Technology Branch of Fraunhofer IOSB Ilmenau Germany Energy Systems Lab GE Global Research Europe Garching bei München Germany

ISBN: (纸本)9781509033584

The increasing use of fluctuating renewable energy represents a challenge for the German electricity market. Electricity storage plants can provide flexibility to the energy system and the development of new, efficient and economical energy storage technologies is of great importance. In this paper, the use of compressed air energy storage plants in the German electricity market is simulated and a sensitivity analysis is carried out. The optimization of the system is done to minimize at each time step the total system costs. The analysis shows the influence of storage plant parameters such as efficiency, storage capacity and natural gas usage on the dispatch and operation hours. It is performed over one year and for three different future scenarios. The results indicate that utilization of storage plants will increase in each scenario considered from 2025 to 2035 but remains in most cases significantly below the maximum capacity of 3000 h/a power generation. While the operation of storage plants lowers the total electricity cost, earnings per plant and profits are not necessarily positive: the wholesale price signals do not create enough revenues to justify the investment in CAES plants. © 2016 IEEE.

关键词： Compressed air

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Results of a Monte Carlo based Risk Analysis on the Impact of PEVs to the Distribution Grid

Results of a Monte Carlo based Risk Analysis on the Impact o...

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IEEE International Energy Conference

作者： Daniel Beyer Stephan Ruhe Peter Bretschneider Jens Ehrhardt Fraunhofer Advanced System Technology (AST) Branch of Fraunhofer IOSB envia Mitteldeutsche Energie AG

ISBN: (纸本)9781467384643

This paper presents the study results of possible plug in electric vehicle (PEV) integration potentials in a commonly occurring rural distribution grid in Germany as a worst case scenario simulation. This worst case consideration means, that all the simulations are running at a fix defined load point at one specific moment in time. After the simulation case definition, like e.g. the so called "strong load case", the different in Germany commonly occurring PEV-classes are connected step by step to the 0,4 kV grid. So it is possible to compute the maximum integrable amount of PEVs (of each class) in dependency on the grid operation risks. As the core method the conventional Monte Carlo approach were used in a self-implemented characteristic.

关键词： Plugin electric vehicles Smart grid Vehicle charging Simulation method

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Optimized provision of minute reserve capacity products by controlled charging of electric vehicles

Optimized provision of minute reserve capacity products by c...

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International Conference on European Electricity Market, EEM

作者： Alexander Arnoldt Therese Klarner Sabine Ritter Oliver Warweg Energy Business and System Analysis Advanced System Technology Branch of Fraunhofer IOSB Ilmenau Germany

This paper presents an approach for the provision of minute reserve capacity products at the German minute reserve market provided by a pool of electric vehicles. Therefore, the requirements of prequalification for market participation have been analyzed and examined with regard to electric vehicle pools. A mixed integer linear programming model has been developed. It ensures the provision and delivery of capacity products in an optimal way, whilst the electric vehicles charging demands are also ensured.

关键词： Optimization Load modeling Schedules Mathematical model Plugs Electric vehicles Linear programming

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A procedure for approximating a complex hydrodynamic model by the adaptive time delay method 16

A procedure for approximating a complex hydrodynamic model b...

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16th World Environmental and Water Resources Congress 2016: Professional Development, Innovative technology, International Perspectives, and History and Heritage

作者： Nguyen, Long Duc Karimanzira, Divas Rauschenbach, Thomas Ribbe, Lars Advanced System Technology Branch of Fraunhofer IOSB Am Vorgelherd 50 Ilmenau98693 Germany Faculty of Computer Science and Automation Ilmenau Univ. of Technology Ehrenbergstraße 29 Ilmenau98693 Germany 50679 Germany

ISBN: (数字)9780784479841

ISBN: (纸本)9780784479841

Model reduction in water systems provides an efficient technique for simplifying complex hydrodynamic models without eliminating the key dynamic attributes, and is inevitable for model-based control. In particular, the first order model with adaptive time delay (ATD) has proven to be suitable for approximating hydrodynamic behavior of river reaches. Experimental results of identifying parameters of ATD models from a complex hydraulic model (e.g., HECRAS) show that the state-of-art of existing methods is not enough, because time constant and time delay mutually interact, are variably and significantly depend on flood wave characteristics. Hence, the present work proposes a procedure to identify these parameters. At first, the hydrograph of extreme flood event is generated and analyzed to derive a characteristic hydrograph. Secondly, the typical outflow is simulated by HECRAS model and the inflow and outflow generated from HECRAS are used to estimate parameters of ATD model by nonlinear programming technique. A set of time constant and time delay corresponding to characteristic flood wave will be validated by a specific flood event. This procedure is an advancement of previous methods which model flow by a simplified channel geometry. In addition, it compensates deficiencies of existing methods attempting to fix a time delay as an integer value or a constant value which introduces truncation error during routing process leading to model instability. Therefore, the approach is capable to different types of flow, and returns very promising results in real time flood forecasting and control. © 2016 ASCE.

关键词： Time delay

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Achievable revenues for electric vehicles according to current and future energy market conditions

Achievable revenues for electric vehicles according to curre...

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International Conference on European Electricity Market, EEM

作者： Bjoern Illing Oliver Warweg Fraunhofer IOSB - Advanced System Technology AST Ilmenau Germany

Electric vehicles (EV) play a crucial role within the changing global and national energy policies. Thereby the market integration creates more difficulties than the technical feasibility. The controlled charging of EVs offers a possibility to trade at the energy as well as the reserve power market. A few business cases exist by which new actors like i.e. aggregators can obtain revenue. But exact figures of revenues are lacking. Thus general statements of the cost efficiency of EV market integration are missing. This paper analyses the latest development in German energy policy concerning its influence on current and future market conditions. A business model is developed to fit these market conditions. Using a holistic simulation model the revenues of EV integration are calculated depending on the market conditions, the business model as well as the regarded market. The result is the evaluation of the energy markets and shows which market is best suited to forward the electric vehicle integration.

关键词： Fuels Europe

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Sensitivity analysis of adiabatic compressed air energy storage

Sensitivity analysis of adiabatic compressed air energy stor...

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IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

作者： Liane Rublack Oliver Warweg Peter Bretschneider Sebastian Freund Mathilde Bieber Dept. Energy Advanced System Technology Branch of Fraunhofer IOSB Ilmenau Germany Energy Systems Lab Garching bei München Germany

ISBN: (纸本)9781509033591

关键词： Natural gas Optimization Adiabatic Turbines Energy storage Atmospheric modeling

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