PI: Mani Venkatsubramanian
Co-PI(s):
Sponsor: Power System Engineering Research Center
Award Amount: $200,000
Project Period: 7/2019 – 7/2021
Summary: With the growth of renewable energy sources, the transmission flow patterns are changing in power grids all over the world. Moreover, fast dynamic devices that are built into the newer power electronic based energy interfaces and advanced control systems are interacting with the traditional power grid controls in unknown ways. These complex and nonlinear dynamic mechanisms are impacting on the small-signal and transient stability properties of the power system. This project will focus on the study of nonlinear phenomena in the presence of poorly damped oscillatory modes for understanding the impact of the nonlinearities on transient stability properties. Specifically, the analysis will develop methods to distinguish between supercritical (nonlinear stable) versus subcritical (nonlinear unstable) types of oscillatory behavior. Model based simulation and bifurcation analytic studies will be used to derive insight and theoretical understanding, and the project will then extend the analysis to measurement based algorithms to the extent possible. The project will also work on speeding up time-domain ambient modal analysis methods for reducing their computational burden, and develop efficient methods for processing real-time alarms by combining the estimation results from multiple ambient and ringdown analysis algorithms