Distributed control and optimization in power grids

Research Centre: Research Centre for Systems & Control

Speaker: Dr Ioannis Lestas, University of Cambridge

Abstract:

Modern power grids are currently undergoing significant transformations with an increasing need for improved efficiency and also for distributed control policies with a plug and play capability. We consider in this talk the problem of designing distributed control schemes in power networks such that stability and an optimal power sharing can be guaranteed. Local conditions on the bus dynamics are presented which allow stability for the entire network to be guaranteed, while also leading to convergence to an optimal power allocation. Various distributed control schemes are discussed for primary and secondary frequency control. Generalizations are also presented to advanced power system models involving both voltage and frequency control dynamics, and also the derivation of decentralized conditions that reduce the conservatism by taking into account the coupling strength among neighbouring dynamics.

Bio:

Ioannis Lestas received the B.A. (Starred First) and M.Eng. (Distinction) degrees in Electrical Engineering and Information Sciences and the Ph.D. in control theory from the University of Cambridge (Trinity College). His doctoral work was performed as a Gates Scholar. He has been a Junior Research Fellow of Clare College, Cambridge and has been awarded a five year Royal Academy of Engineering research fellowship. He is also the recipient of a five year ERC starting grant. He is currently a University Lecturer at Cambridge, Department of Engineering. His research interests include the analysis and control of large scale networks with applications in power systems and smart grids, data networks, and biological networks.