Campuses:

distributed control

Thursday, May 12, 2016 - 9:45am - 10:30am
Alejandro Dominguez-Garcia (University of Illinois at Urbana-Champaign)
This talk discusses the problem of frequency regulation in islanded ac microgrids with no inertia, i.e., those consisting entirely of generators interfaced through power electronics. The control architecture we propose to achieve this is designed to drive the average frequency error to zero while ensuring that the frequency at every bus is equal and that the operating point that results is stable. We also introduce a distributed implementation of the proposed control architecture that relies on a combination of several distributed algorithms.
Tuesday, May 10, 2016 - 3:15pm - 4:00pm
Ana Busic (INRIA )
Renewable energy sources such as wind and solar power have a high degree of unpredictability and time-variation, which makes balancing demand and supply challenging. One possible way to address this challenge is to harness the inherent flexibility in demand of many types of loads. We propose a technique for distributed control for automated demand response that can be used by grid operators as ancillary service for maintaining demand-supply balance. It is assumed that there is one-way communication from the grid operator to each load.
Tuesday, May 10, 2016 - 9:00am - 9:45am
Christopher DeMarco (University of Wisconsin, Madison)
A long literature has illustrated the potentially severe consequences of subversion of feedback control within electric power grids, well before Stuxnet brought wide attention to the threat of industrial control system cyber-attacks. The electromechanical dynamics of the power system make it uniquely vulnerable. Power grids typically possess lightly damped, wide-area oscillatory modes, requiring relatively little control energy to destabilize, thereby allowing subverted control systems to induce wide-area instabilities.
Wednesday, October 21, 2015 - 11:30am - 12:20pm
Neil Walton (Universiteit van Amsterdam)
We consider distributed control in two distinct network applications: sponsored search and switched networks.

First, we consider a large-scale sponsored search market. For this pay-per-click market, we discuss an efficient and highly decomposed mechanism that maximizes social welfare. Here on each search occurrence, the search-platform solves an assignment problem and, on a slower time scale, each advertiser submits a bid which matches its demand for click-through with supply.
Monday, October 19, 2015 - 2:00pm - 2:50pm
Anders Rantzer (Lund University)
Consider a network where each node is generating products using a time-varying supply of resources and consumes products to satisfy a time-varying set of needs. The actions of each node are governed by a desire to optimize a given utility function. Two main control approaches will be discussed. In the first approach a distributed control law is designed to attenuate the effect of disturbances. A global performance objective for the network dynamics is optimized. This can be done in a scalable way using the theory for positive/monotone systems.
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