Browsing by Author "Gehrke, O."
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Item An integrated pan-European research infrastructure for validating smart grid systems(2018-12-01) Strasser, Thomas I.; Pröstl Andrén, F.; Widl, E.; Lauss, G.; De Jong, E. C. W.; Calin, M.; Sosnina, M.; Khavari, A.; Rodriguez, J. E.; Kotsampopoulos, P.; Blank, M.; Steinbrink, C.; Mäki, K.; Kulmala, A.; van der Meer, A.; Bhandia, R.; Brandl, R.; Arnold, G.; Sandroni, C.; Pala, D.; Morales Bondy, D. E.; Heussen, K.; Gehrke, O.; Coffele, F.; Tran, Q.-T.; Rikos, E.; Nguyen, V. H.; Orue, I.; Degefa, M. Z.; Manikas, S.; POWER SYSTEMSA driving force for the realization of a sustainable energy supply in Europe is the integration of distributed, renewable energy resources. Due to their dynamic and stochastic generation behaviour, utilities and network operators are confronted with a more complex operation of the underlying distribution grids. Additionally, due to the higher flexibility on the consumer side through partly controllable loads, ongoing changes of regulatory rules, technology developments, and the liberalization of energy markets, the system’s operation needs adaptation. Sophisticated design approaches together with proper operational concepts and intelligent automation provide the basis to turn the existing power system into an intelligent entity, a so-called smart grid. While reaping the benefits that come along with those intelligent behaviours, it is expected that the system-level testing will play a significantly larger role in the development of future solutions and technologies. Proper validation approaches, concepts, and corresponding tools are partly missing until now. This paper addresses these issues by discussing the progress in the integrated Pan-European research infrastructure project ERIGrid where proper validation methods and tools are currently being developed for validating smart grid systems and solutions.Item An integrated research infrastructure for validating cyber-physical energy systems(Springer Verlag, 2017) Strasser, T. I.; Moyo, C.; Bründlinger, R.; Lehnhoff, S.; Blank, M.; Palensky, P.; van der Meer, A. A.; Heussen, K.; Gehrke, O.; Rodriguez, J. E.; Merino, J.; Sandroni, C.; Verga, M.; Calin, M.; Khavari, A.; Sosnina, M.; de Jong, E.; Rohjans, S.; Kulmala, A.; Mäki, K.; Brandl, R.; Coffele, F.; Burt, G. M.; Kotsampopoulos, P.; Hatziargyriou, N.; Strasser, Thomas; Wahlster, Wolfgang; Marik, Vladimir; Kadera, Petr; POWER SYSTEMS; Tecnalia Research & InnovationRenewables are key enablers in the plight to reduce greenhouse gas emissions and cope with anthropogenic global warming. The intermittent nature and limited storage capabilities of renewables culminate in new challenges that power system operators have to deal with in order to regulate power quality and ensure security of supply. At the same time, the increased availability of advanced automation and communication technologies provides new opportunities for the derivation of intelligent solutions to tackle the challenges. Previous work has shown various new methods of operating highly interconnected power grids, and their corresponding components, in a more effective way. As a consequence of these developments, the traditional power system is being transformed into a cyber-physical energy system, a smart grid. Previous and ongoing research have tended to mainly focus on how specific aspects of smart grids can be validated, but until there exists no integrated approach for the analysis and evaluation of complex cyber-physical systems configurations. This paper introduces integrated research infrastructure that provides methods and tools for validating smart grid systems in a holistic, cyber-physical manner. The corresponding concepts are currently being developed further in the European project ERIGrid.Item Inverter interconnection tests performed in the LABEIN-Tecnalia microgrid involved in the DERlab round-robin testing activity(2009) De Muro, A. Gil; Rodriguez-Seco, J. E.; Zabala, E.; Mayr, C.; Bründlinger, R.; Romanovsky, G.; Gehrke, O.; Isleifsson, F.; POWER ELECTRONICS AND SYSTEM EQUIPMENT; POWER SYSTEMS; Tecnalia Research & InnovationOne of the key objectives of DERlab Network of Excellence is the development of internationally acceptable test and certification procedures for Distributed Energy Resources (DER)-components and systems connection and operation, which could be proposed to European standardisation bodies. Interconnection of inverters to the electrical grid has been identified as a key issue for the wide integration of DER, especially when international standards scenario is highly unclear. As a prenormative research, a round-robin test of two small scale photovoltaic inverters has been performed by nine DERlab laboratories during the period of January - July 2009. The test activity was focused on the verification of individual test procedures, common interpretation of standards and requirements, and determination of problems related to the equipment and facilities involved in conducting round-robin tests. Compilation of test results and first conclusions of this activity will be available during this year. As part of the intercomparison campaign, this paper is focused on the round-robin tests carried out in the microgrid of LABEIN-Tecnalia in Derio (Spain) in February 2009. It shows the results obtained and explain the lessons learned from this series of experiments to assess the application of a unified testing procedure across different testing environments.Item Towards holistic power distribution system validation and testing - An overview and discussion of different possibilities(2016) Strasser, T.; Andrèn, F.; Lauss, G.; Bründlinger, R.; Brunner, H.; Moyo, C.; Seitl, C.; Rohjans, S.; Lehnhoff, S.; Palensky, P.; Kotsampopoulos, P.; Hatziargyriou, N.; Arnold, G.; Heckmann, W.; De Jong, E. C.W.; Verga, M.; Franchioni, G.; Martini, L.; Kosek, A. M.; Gehrke, O.; Bindner, H.; Coffele, F.; Burt, G.; Calin, M.; Rodriguez-Seco, J. E.; POWER SYSTEMSRenewable energy sources are key enablers to decrease greenhouse gas emissions and to cope with the anthropogenic global warming. Their intermittent behaviour and limited storage capabilities present challenges to power system operators in maintaining the high level of power quality and reliability. However, the increased availability of advanced automation and communication technologies has provided new intelligent solutions to face these challenges. Previous work has presented various new methods to operate highly interconnected power grids with corresponding components in a more effective way. As a consequence of these developments the traditional power system is transformed into a cyber-physical system, a smart grid. Previous and ongoing research activities have mainly focused on validating certain aspects of smart grids, but until now no integrated approach for analysing and evaluating complex configurations in a cyber-physical systems manner is available. This paper tackles this issue and addresses system validation approaches for smart grids. Different approaches for different stages in the design, development, and roll out phase of smart grid solutions and components are discussed. Finally, future research directions are analysed.