This breakthrough algorithm developed by scientists at Oak Ridge National Laboratory and the University of Tennessee, Knoxville, offers a groundbreaking solution to the critical issue of predicting electric grid stability. By tapping into signals from pumped storage hydropower (PSH) projects, the method provides valuable insights, especially in the context of the grid's increasing reliance on intermittent renewable power sources. PSH, a form of renewable energy, plays a pivotal role by providing inertia to the grid, essential for maintaining balance.
The novel algorithm focuses on the distinct signal generated when PSH pumps shut down, enabling the calculation of overall grid inertia. This becomes particularly significant as traditional sources like coal and gas are gradually replaced by renewable energy, resulting in reduced inertia. Unlike traditional power plants, solar and wind, which are integral parts of the evolving energy landscape, contribute minimal inertia to the grid due to their connection through inverters.
The researchers, led by Yilu Liu, UT-ORNL Governor's Chair for power grids, have successfully incorporated the PSH signal into their algorithm. Additionally, they leverage data from low-cost grid sensors deployed across the country through the FNET/GridEye system developed by ORNL and UTK researchers for comprehensive grid monitoring. The resulting algorithm provides grid operators with a real-time and highly accurate estimation of grid inertia, critical for anticipating and addressing potential instability issues.
To make the benefits of this innovative approach more accessible, the researchers have developed a visualization interface. This tool empowers grid operators to monitor grid inertia efficiently, offering enhanced situational awareness and better preparation for potential instability. The validation of this method involved collaboration with utilities and power regulating authorities across the western and eastern United States, where pumped storage hydropower projects are prevalent.
As the global energy landscape undergoes a paradigm shift towards increased reliance on renewable sources, solutions like this algorithm become indispensable. By demonstrating the importance of inertia and showcasing how pumped storage hydro can contribute, the researchers hope to pave the way for improved grid stability, especially amid the growing integration of intermittent renewable energy sources. The visualization tool is now being demonstrated to utilities and grid coordinating authorities, emphasizing its potential significance in enhancing the resilience and efficiency of modern power grids.
Source: Techxplore.com