PhD defence Thomas le Fevre Kristensen


12.12.2017 kl. 12.30 - 12.12.2017 kl. 16.00


“Assessment of Electricity Distribution Grid Control Utilizing Information Access over Non- ideal Communication Networks”

Among private households the popularity of photo voltaic panels and small wind turbines is increasing. This introduction of power production into the distribution grids cannot be accommodated by the current power grid control systems. In order to ensure proper power quality, future distribution grid controllers will require up-to-date information about the power grid and its state. Since this information is distributed over the entire power grid, a communication network is needed to provide it to the controllers. In this dissertation we focus on how these communication networks and their imperfections impact the performance of the smart grid control system, and how the impact can be minimized.

To investigate this impact, several evaluation frameworks were developed, ranging from simulation frameworks to real-time experimental test setups. These frameworks were used to evaluate distribution grid energy balancing and voltage control use cases under different communication network scenarios. Once the impact of imperfect communication network conditions on smart grid system performance is established, an information quality metric is proposed as a way to link communication network performance to overall control system performance as not to remove the need to evaluate the overall system performance for communication network analysis. Such an information quality metric is introduced as the probability of having incorrect information at the moment of control actuation due to communication network delay. This metric is then evaluated against the overall system performance to gain an understanding of how this metric can be used as an intermediate link between communication network studies and control studies.

Assessment Committee
Senior Researcher, Felicita Di Giandomenico, Dependable Computing LAB at ISTI, Italy
Network Architect, Morten Tranberg Hansen, Kamstrup A/S, Denmark
Associate Professor, Tatiana K. Madsen, Aalborg University (Chairman)

Professor, Hans-Peter Schwefel, Aalborg University
Associate Professor, Rasmus L. Olsen, Aalborg University

Associate Professor, Flemming B. Frederiksen, Aalborg University

After the defence there will be a reception at Fredrik Bajers Vej 7, room A1-112. Please feel welcome to join


Free of charge


Wireless Communication Networks Section, Department of Electronic Systems


Aalborg University, Fredrik Bajers Vej 7, room A4-108