Invited talks by Line Roald and Josh Taylor
We have invited Line Roald from the University of Washington and Josh Taylor from the New Jersey Institute of Technology to give talks on their recent research findings.
Line Roald will explore the question of how consumers can most effectively reduce the carbon footprint of their electricity consumption and Josh Taylor will present their recent paper on active distance protection in inverter-fed grids.
Date and Time
- Date: 10 Jan 2024
- Time: 10:00 AM to 12:01 PM
- All times are (UTC+01:00) Copenhagen
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Participate in the invited talks via Zoom.
How Can Consumers Most Effectively Reduce the Carbon Footprint of Their Electricity Consumption?
Many consumers are looking for ways to reduce their carbon footprint. An increasing share of consumers own loads whose consumption can easily be changed in time, such as electric vehicle charging, and/or in space, such as hyper-scale computing loads. Many such consumers are seeking a more direct way to reduce their carbon footprint than through demand response or market participation. In this talk, we discuss the question of how consumers can shift their load to most effectively reduce carbon emissions, as well as what metrics they should use to guide their shifting. We will focus on the case of a hyper-scale data center but try to learn lessons that are relevant for all loads.
Line Roald is an Associate Professor and Grainger Institute Fellow in the Department of Electrical and Computer Engineering in University of Wisconsin—Madison. She received her Ph.D. degree in Electrical Engineering (2016) from ETH Zurich, Switzerland. Prior to joining UW Madison, she was a postdoctoral research fellow with the Center of Non-Linear Studies at Los Alamos National Laboratory. She is the recipient of an NSF CAREER award, several best paper awards and the UW Madison ECE Outstanding Graduate Mentor award. Her research
interests center around modeling and optimization of energy systems, with a particular focus on managing uncertainty and risk from extreme weather and renewable energy variability.
Active Distance Protection in Inverter-fed Grids
Power system protection schemes today rely on currents rising by several orders of magnitude when faults occur. In inverter-fed grids, a fault current might be just a few percent larger than normal, making detection more difficult. One solution is for the inverter to slightly perturb its output current and/or voltage, i.e., to inject an auxiliary signal, so as to make the system's behavior under faults easier to distinguish from normal. In this paper, we optimize auxiliary signals for fault detection with distance relays. We begin with a standard auxiliary signal design problem for generic static systems. We use duality to reformulate the problem as a bilinear program, which we solve using the convex-concave procedure. We implement the framework in an example based on distance protection, in which the auxiliary signal is negative sequence current.
Josh Taylor received the B.S. from Carnegie Mellon University in 2006 and the Ph.D. from the Massachusetts Institute of Technology in 2011, all in Mechanical Engineering. From 2011 to 2012, he was a postdoctoral researcher at the University of California, Berkeley. He was an assistant and then associate professor at the University of Toronto from 2013 to 2023. He is currently an associate professor of Electrical and Computer Engineering at the New Jersey Institute of Technology. His research focuses on control and optimization of energy and water infrastructure.
10 am: Associate Prof. Line Roald: How Can Consumers Most Effectively Reduce the Carbon Footprint of Their Electricity Consumption?
11 am: Associate Prof. Josh Taylor: Active Distance Protection in Inverter-fed Grids