Department of Computer Science

PhD defence by Emmanouil Valsomatiz

In partial fulfillment of the terms for obtaining the PhD degree, Emmanouil Valsomatzis will give a lecture on the following subject: Aggregation Techniques for Energy Flexibility on Monday 4th of December 2017, 13:00, in room 0.2.13 at Selma Lagerlöfs Vej 300

Last modified: 22.11.2017


Over the last few years, the cost of energy from renewable resources, such as sunlight and wind, has declined resulting in an increasing use of Renewable Energy Sources (RES). As a result, the energy produced by RES is fed into the power grid while their share is expected to significantly increase in the future.

However, RES are characterized by power fluctuations and their integration into the power grid might lead to power quality issues, e.g., imbalances. At the same time, new energy hungry devices such as heat-pumps and Electric Vehicles (EVs) become more and more popular. As a result, their demand in power, especially during peak-times, might lead to electrical grid overloads and congestions. In order to confront the new challenges, the power grid is transformed into the socalled Smart Grid. Major role in Smart Grid plays the Demand Response (DR) concept. 

According to DR, Smart Grid better matches energy demand and supply by using energy flexibility. Energy flexibility exists in many individual prosumers (producers and/or consumers). For instance, an owner of an EV plugs-in his EV for more time than it is actually needed. Thus, the EV charging can be timely shifted. The load demanded for charging could be moved to time periods when production from wind turbines is high or away from peak-hours. Thus, RES share is increased and/or the electrical grid operation is improved.

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All interested parties are welcome. After the defense the department will be hosting a small reception in cluster 3.

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