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Skelleftea, Sweden

Agency: Cordis | Branch: FP7 | Program: CP | Phase: ICT-2013.6.4 | Award Amount: 4.59M | Year: 2013

The global demand for energy will challenge energy supply directly impacting the productivity for future growth and prosperity of cities. Stability and efficiency across multi domain energy grids are crucial. Coupling technologies like Combined Heat and Power (CHP) allow theses multi-utility grids to be considered and operated as Hybrid Energy Network increasing even more efficiency levels and reducing overall CO2 footprint. Although multi-dimensional synergies are increasingly apparent, they neither have been comprehensively investigated so far.\n\nIn this project, a Hybrid Energy network control system for Smart Cities will be elaborated implementing novel Cooperative Control Strategies for the optimal interactions between multiple in Coexistence operated energy grids. This will improve the existing hybrid network. Exploiting higher levels of ICT in all energy systems, methods for enabling simultaneous optimization for individual response requirements, energy efficiencies and energy savings as well as coupled operational, economic and social impacts will be developed by\n Enhanced realization of todays market by enhancing grid systems with physical coupling options and enhanced control strategies exploited by increasing level of smart infrastructure (metering, sensors, ICT infrastructure) for operation control including grid coupling devices, and adaptation of the monitoring systems advances available in the ICT Machine-to-Machine field, and incorporation sophisticated meteorological data for different time resolutions needs;\n Concept realizations in future markets through definition of cooperative algorithms for cross-grid control decisions capable of load balancing by optimizing multiple utilities demand, supply and storage preferences to integrate prosumers and utilizing respective control strategies in decision support system design for an energy control platform based on different new business models.\nThe demonstration targets will be two cities, Ulm in Germany and Skellefte in Sweden. The outcomes of the project, namely the Cooperative control Strategies for the Cooperative Coexistence of Hybrid Energy Networks will be integrated in the existing ICT infrastructure of the demo sites at the city of Ulm and the city of Skellefte.\nThe results of the evaluation will be concluded and highlight the lessons learnt throughout the different processes. All activities planned for the dissemination will facilitate the take-up of the results, in particular targeting ICT Providers, municipal authorities, representatives from distributor and energy system operators and stakeholders of the smart cities and communities to ensure the replication of the Cooperative Control strategy for the Cooperative Coexistence of Hybrid Energy Networks.

Ronnberg S.K.,Lulea University of Technology | Bollen M.H.J.,Lulea University of Technology | Bollen M.H.J.,Stri Ab | Wahlberg M.,Lulea University of Technology | Wahlberg M.,Skelleftea Kraft Elnat AB
IEEE Transactions on Power Delivery | Year: 2011

This paper discusses some of the electromagnetic-compatibility issues concerning the use of power lines for communication. Based on a series of measurements performed in a laboratory environment and in the field, five different types of interactions between communication and end-user equipment are distinguished. Measurement examples are shown for several of these types. It is concluded that the creation of a low-impedance path by end-user equipment is the main cause of interference. © 2011 IEEE. Source

Larsson E.O.A.,Lulea University of Technology | Bollen M.H.J.,Lulea University of Technology | Bollen M.H.J.,Stri Ab | Wahlberg M.G.,Lulea University of Technology | And 3 more authors.
IEEE Transactions on Power Delivery | Year: 2010

This paper presents different methods to describe voltage and current distortion in the frequency range 2 to 150 kHz. The timefrequency domain was shown to give additional information next to the time-and frequency-domain representations. Measurements of different devices and at different locations showed remnants of the switching frequency of the power electronics as well as lower frequency oscillations around the current zero crossing to be present in voltage and current. The voltage distortion is shown to vary a lot during the day and between locations. © 2010 IEEE. Source

Ronnberg S.K.,Lulea University of Technology | Wahlberg M.,Lulea University of Technology | Wahlberg M.,Skelleftea Kraft Elnat AB | Bollen M.H.J.,Lulea University of Technology | Bollen M.H.J.,Stri Ab
Proceedings of International Conference on Harmonics and Quality of Power, ICHQP | Year: 2012

The paper presents measurements performed in an urban area in the north of Sweden with two individual houses and on LV side of the distribution transformer supplying these two and ten more houses. Measurements of harmonic and interharmonic groups were performed before and after replacing all existing (mainly incandescent) lamps in all 12 houses with LED lamps. The total power of all lamps was reduced from approximately 2300 W to approximately 450 W, per house. All new lamps were low-power-factor lamps. The paper shows the variations of the most important harmonics with time and relevant spectra before and after the replacement. The emission during the evening hours is studied in specific detail. Despite the low power factor of the individual lamps, no change in emission due to the lamps has been observed, neither for any of the two individual houses nor the distribution transformer supplying all 12 houses © 2012 IEEE. Source

Yang K.,Lulea University of Technology | Bollen M.H.J.,Lulea University of Technology | Bollen M.H.J.,Stri Ab | Wahlberg M.,Lulea University of Technology | Wahlberg M.,Skelleftea Kraft Elnat AB
IEEE Power and Energy Society General Meeting | Year: 2011

This paper presents measurements of harmonic current emissions up till 2kHz from four different windparks in northern Sweden, all equipped with modern power-electronics converters. The measurement results are presented in different ways, including a method to quantify the impact on the grid and a method to show the variations in the spectrum with time. The results show that there exists different dominating harmonics in different windturbines and that the magnitudes of the individual frequency components vary strongly with time. Each turbine however shows a broadband component with superimposed narrowband components. The impact on the grid, with reference to permissible levels of voltage distortion, is biggest for the interharmonic components. © 2011 IEEE. Source

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