As an expert in large grid dynamic modeling and simulations, Yilu Liu is using signals from pumped storage hydropower to monitor grid inertia, which helps grid operators predict and avoid potential outages.
Tell us about your research and its impacts on hydropower.
The project that I work on is actually using pumped storage hydropower for grid service and specifically a very good probing signal to estimate system inertia. Inertia is basically a physical phenomenon. If something is rotating, it takes energy to make it stop. You want to constantly know the inertia because you want to know that, if you have a disturbance in the system, how much help you need to give the grid in order to stabilize it. The probing tests the system's ability to stay still.
What keeps you motivated?
Generally, I think it's interesting work. You feel the work is worthwhile – it's important. Because you can contribute. And, of course, you know, working with students... working with young people keeps you young and energized.
What would you tell a female student considering a career in water power research and development?
If they are this far, you know, if they're young scientists, at Oak Ridge National Lab or if they're already an engineering school women's student, I would tell them they are already past 99 percent of the hurdle. I think the people who really need help are the kids who are before fifth grade. That's when they decide engineering or STEM or maths or physics are too challenging for them.
I would still go back to the famous saying "follow your passion." If you find yourself good in maths, physics, you can easily pursue any of those. Science and engineering careers are rewarding both financially as well as mentally.
This research is supported by the Water Power Technologies Office in the Department of Energy’s Office of Energy Efficiency and Renewable Energy.