Professor Ian Hiskens, University of Michigan, Ann Arbor
Modelling and Control of Load Ensembles
Abstract: Growth in non-dispatchable generation, particularly renewable sources, is placing greater reliance on demand response (non-disruptive load control) for maintaining generation-load balance. Participation in fast-acting demand response can be maximized through aggregation of many small electrical loads. Numerous control strategies have been proposed for coordinating the behaviour of load ensembles to assist in power system operations. Modelling the natural and controlled response of such distributed systems is, however, quite challenging. Various modelling formalisms will be presented and their characteristics discussed. The dynamic behavior of load ensembles is strongly dependent on stochasticity and disorder within the load population. These effects will be illustrated and methods of capturing uncertainty within aggregate models will be considered. Load ensembles are inherently nonlinear and may display quite complicated dynamics, for example bifurcations associated with synchronization. Accordingly, controls must be carefully designed to avoid such complex behaviour. Case studies will illustrate the capability of load ensembles to provide fast-acting frequency regulation and to track the output of renewable generation.
Bio: Ian A. Hiskens holds the Vennema Professor of Engineering endowed chair in the Department of Electrical Engineering and Computer Science at the University of Michigan, Ann Arbor. He has held prior appointments in the Queensland electricity supply industry (for ten years), and various universities in Australia and the United States. Dr Hiskens’ research interests lie at the intersection of power system analysis and systems theory. His recent activities have focused on systems issues arising from large-scale integration of new forms of generation, and on the development of non-disruptive load control strategies. Other research interests include nonlinear and hybrid dynamical systems. He is actively involved in various IEEE societies, and recently completed his term as Vice-President for Finance of the IEEE Systems Council. He has served as an Associate Editor of IEEE Transactions on Power Systems, IEEE Transaction on Control Systems Technology and IEEE Transactions on Circuits and Systems. He is a Fellow of IEEE, a Fellow of Engineers Australia, and a Chartered Professional Engineer in Australia.
The lectures are free and everyone is welcome to attend.
ECE Distinguished Lectures Series website