Fredrik Bajers Vej 5
Postboks 159 9100 Aalborg
Telefon: 9940 9940
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27.06.2017 kl. 13.00 - 16.00
Hengwei Lin, Department of Energy Technology, will defend the thesis "Protection and Stability Analysis in Microgrids".
Protection and Stability Analysis in Microgrids
Professor Josep M. Guerrero
Associate Professor Laszlo Mathe
Associate Professor Dezso Sera, Dept. of Energy Technology, Aalborg University (Chairman)
Professor Manuela Sechilariu, Université de Technologie de Compiègne, France
Associate Professor Jose Matas, BarcelonaTech UPC, Spain
Due to the high penetration of renewable energy integration and the liberalization of electricity market, lots of distributed generation units (DGs) have been integrated into the transmission and distribution systems. On the other hand, the entire electrical system has been evolving towards to an intelligent entity with more flexible ancillary services for consumers and utilities. The “smart grid” empowers the utilities and the consumers to realize new ways of operation and participation in power industry.
In extensive distribution systems, microgrid is regarded as an effective solution to manage/organize the downstream on-filed devices such as DGs, reactive compensation devices, storage units and loads. In this project, the author mainly focuses on the stability analysis for power electronic converters and the automatic protection and control system for microgrids in distribution automation. In industrial electrical systems, the system stability is often related with various disturbances while the faults behave as significant influences. In case of a fault or serious disturbance, protection must response quickly and correctly to ensure the power system operated safely. Therefore, it is meaningful to analyze the stability from a system level, instead of only focusing on the control subsystem for power electronic system which is already addressed in the previous literatures. This is also the motivation that this project focuses on the stability analysis and protection for microgrids.
However, there are some difficulties to analyze the stability for a real power system due to the severe complexity and nonlinearity. It means some new methodologies, perspectives, and proper simplifications should be considered to deal with the challenges. This project addresses mainly two practical problems: 1. from a time scale decomposition perspective, the angle instability mechanism for voltage-controlled converters is illustrated with both theoretical analysis and experiment verification. It means the power-electronics-based electrical system has the ability to maintain stable and efficient operation depending on cautious planning and design, which requires both advanced hardware and software in modern power system and future smart grid. 2. A new rule-based adaptive protection approach combined with machine learning is proposed for microgrids that can be flexibly integrated into the distribution automation system. A statistic method is also adopted in this protection scheme to analyze the influence of uncertain elements. Moreover, a discussion section is proposed for microgrids to perform reconfiguration automatically and intelligently as additional ancillary services with the extended concept of modular power architectures. Since there are still uncertainties for the evolution of the microgrid and the smart grid over time, the project presents an attempt and preparation for power industry toward an efficient framework for the future.
Department of Energy Technology
Pontoppidanstræde 111, auditorium
15.08.2017 kl. 08.00 - 18.08.2017 kl. 18.00
From 15-18 August 2017, the 29th Congress of Nordic Historians will take place at Aalborg Congress & Culture Centre, Denmark. The main organisers are the Centre for History at the Department for Culture and Global Studies at Aalborg University, the Danish Historical Society and the Nordic Committee for Historians.
18.08.2017 kl. 13.00 - 16.00
Klinisk Institut, Aalborg Universitet og Aalborg Universitetshospital har den glæde at invitere til ph.d.-forsvar ved læge Lasse Jørgensen Cehofski, Øjenafdelingen, Aalborg Universitetshospital, som forsvarer ph.d.-afhandlingen: The Retinal Protein Profile in Experimental Branch Retinal Vein Occlusion - Interventions With an Intravitreal Anti-VEGF Agent and a Corticosteroid Implant
18.08.2017 kl. 13.00 - 16.00
Anitha Asamoah, Department of Chemistry and Bioscience, will defend her thesis on "Assessment of the Contamination Level of Persistent Organic Pollutants in Breast Milk of Ghanaian Women from a Polluted Area in Accra"
18.08.2017 kl. 13.00 - 16.00
18.08.2017 kl. 13.00 - 17.00
Maciej Plocharski will defend his ph.d. thesis: "Sulcal Morphology Analysis from MRI Data for Classification of Alzheimer’s Disease"
20.08.2017 kl. 18.00 - 22.08.2017 kl. 16.00
These are extraordinary times. Unprecedented and sustained tourism growth has transformed many cities across Europe while rural and regional areas remain unsure how they can better leverage the massive growth at their doorstep. The tourism industry is undergoing restructuring, new stakeholders are emerging, landscapes of power are shifting, and lines of responsibilities are being redrawn.
21.08.2017 kl. 13.00 - 16.00
21.08.2017 kl. 13.00 - 17.00
Steffan Wittrup Christensen will defend his Ph.D. thesis on "Neck pain – Sensory and motor effects during shoulder movements"
22.08.2017 kl. 08.00 - 24.08.2017 kl. 16.00
For the first time the Nordic Laser Materials Processing Conference is to be held in Aalborg and it is a great pleasure to invite laser scientists and industrial representatives to the 16th NOLAMP conference. We will do our best to make it an inspiring conference for researchers, industry and product developers and manufactures in the laser community.
22.08.2017 kl. 13.00 - 16.00
Farshad Badie will defend his thesis "A Theoretical Model for Meaning Construction through Constructivist Concept Learning - A Conceptual, Terminological, Logical and Semantic Study within Human-Human-Machine Interaction".
23.08.2017 kl. 09.00 - 24.08.2017 kl. 16.00
This PhD course is scheduled to follow up on the two day Tourism Education Futures Initiative (TEFI) Conference “Building our stories: Co-creating tourism futures in research and practice” (20-22 August 2017).
23.08.2017 kl. 10.00 - 15.00
Invitation to a research symposium on "Knees in the Balance - New Results in Knee Osteoarthritis Research"
24.08.2017 kl. 17.00 - 19.00
Hvordan kan ÆSTETISKE LÆREPROCESSER og KUNSTINTEGRERENDE PÆDAGOGIK åbne for nye måder at lære på? Mød kreativitetsforsker Julie Borup Jensen, der sammen med praktikere vil præsentere nye måder at lære på.
28.08.2017 kl. 09.00 - 29.08.2017 kl. 16.30
På Aalborg Universitet holdes hvert år sidst i august konferencen Trafikdage hvor 300 deltagere præsenterer forskningsresultater, analyser samt praktiske erfaringer fra transportsektoren. Deltagerne er både forskere & praktikere, men også politikere og presse – fordi det er vigtigt at understøtte dialog og udbygge netværk.
28.08.2017 kl. 13.00 - 16.00
Title of the thesis: Dwelling in Mundane Mobility: Caravanning in Denmark.