EWE (Germany)

Congestion management in distribution grids is an important task for distribution grid operators, both from a financial and a technological perspective. Whereas large generation units and large controllable loads might in general be controllable in a manual way, this is no option for small distributed generators and loads. With flexibility control in multiple owner scenarios, documentation, transparency and automation are of crucial importance. In this work, we present a fully automated congestion management approach based on a combination of distributed ledger technology and distributed algorithms in an agent-based architectural approach. We present a case study focused on the visualization of the concept and discuss the advantages and possible challenges for this approach. Whereas distributed ledger technology has been introduced for peer-to-peer energy trading within the last years, no similar approach has been presented yet for stable distribution grid management.

Zavarivanje jednostrano na suceonom V spoju uz pomoc keramike na brodskoj konstrukciji je moguce. Ovim postupkom dobija se na efikasnosti, kao i humanizaciji rada zavarivaca u zatvorenom prostoru Kao efikasna, ova tehnika zavarivanja može se vrlo siroko primenjivati u nasoj zavarivackoj praksi. Keramicke podloske su posebno podesne za zavarivanje u otežanim uslovima rada. Stoga je potrebno upoznati specificnosti njihove primene radi povecanja ekonomicnosti zavarivanja. Koreni zavar postavljen je u jednostranom V spoju, koji se zavaruje na keramickoj podloski, te je na taj nacin eliminisano žljebljenje i ponovo zavarivanje u nepovoljnim uslovima. Kvalitet zavarenih spojeva u kombinaciji u potpunosti zadovoljava traženi kvalitet zavarenih spojeva u brodskoj konstrukciji.

Power demand of data centers is a topic of great interest and numerous research papers. Most handle power saving by using virtualization technologies and server consolidation. In this position paper, we propose the idea of approaching a specific power consumption of an entire data center by using virtual machine migration strategies. To achieve this goal, several models of data center components are needed. We illustrate the models we developed as well as the measurement set-up and results we have. These are especially models for server power estimation and for a virtual machine power breakdown. At the end of the paper, we present our further ideas and future research intentions.

ABSTRACTOxide-metal-oxide structures are an alternative to single material transparent electrical contacts. Among other advantages, these multilayer systems provide good conductivity and transmittance, even when fabricated at room temperature. Low temperature processing is a requirement for silicon thin-film solar cells on various flexible substrates. The design and fabrication of oxide-metal-oxide structures based on ZnO:Al and Ag are investigated in this work. Further the integration of an optimized multilayer electrode into an amorphous silicon solar cell in substrate configuration was performed. Measurement results and possible loss mechanisms are discussed.

ABSTRACTLight trapping due to rough transparent conductive oxide (TCO) surfaces is a common and industrially applied technique in thin film silicon solar cells. In this study, we demonstrate a novel light trapping solution using electrochemically deposited, highly doped zinc oxide (ZnO) nanorod arrays which goes beyond standard light management concepts. The n-doped ZnO rods enable the application as front electrode in superstrate configuration. We explain our experimental results by multidimensional solar cell simulations and show how the nanorod array geometry influences the cell performance. The requirement is demonstrated to choose an appropriate average nanorod distance which strongly influences the electrical cell characteristics. The results clearly outline the potential of TCO nanorod technology for enhanced light trapping.

Abstract In January 2005, the EU wide emission trading scheme (EU ETS) for large stationary emitters of CO2 started in its then 25 Member States. The general objective of this novel economic instrument is to help the EU cost-efficiently achieve its Kyoto commitment of reducing its greenhouse gas emissions (GHG) by −8% by 2008–2012 (compared to 1990) and future – possibly more stringent – GHG reduction goals. With a view to the scale of long-term emission reduction requirements, climate protection innovations will have to play a major role. It is therefore of utmost importance to understand how the EU ETS influences activities in these technologies.KeywordsAllocation RuleEmission Trading SchemeCarbon MarketInnovation EffectLocal UtilityThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

In meinem Vortrag mochte ich Ihnen heute das E-Energy Projekt eTelligence vorstellen. Meine Vorredner haben sehr schon die Notwendigkeit dargelegt, warum wir Innovationen fur unser Stromnetz, fur ein modernes Stromnetz brauchen, ob das die Versorgungssicherheit, ob das die erneuerbaren Energien sind. Es gibt vielfaltige Grunde, dass wir unser monochromatisches Energieversorgungssystem uberdenken mussen, und mit eTelligence wollen wir einige der Ideen, die bei der EWE seit vielen Jahren entwickelt werden, weiterbringen. Wir haben uns mit sehr leistungsfahigen Partner, die zum Teil hier vertreten sind, zusammengetan und wollen diese Ideen im Rahmen des Projektes „eTelligence“ in einem Feldtest umsetzen, den Nutzen demonstrieren und damit genau wie von Herrn Scott angesprochen einige dieser Schritte tun, namlich das akademische Wissen demonstrieren, als Feldtest umsetzen und Erfahrungen sammeln.