Publications

Sep, 2026

ORNL Report

Component-Level Analysis of System Degradation, Restoration, and Resilience: Development of a Scalable Grid Interconnection-Point Availability Model

Electric-grid resilience is difficult to quantify because system performance depends on network topology, component reliability, operating configuration, and restoration time. This project produced a scalable component-level framework for estimating resilience at grid interconnection points. The framework converts standard power-system planning models to undirected network…

Aug, 2026

Journal

Assessing Transmission Grid Resilience Through Graph-Theoretic Contingency Bounds

Aug, 2026

ORNL Report

ORNL CESER August Monthly Highlight Report

Jul, 2026

Conference Paper

Understanding Regional Inertia Dynamics in CAISO from Real Grid Disturbances

The shift from synchronous generators to inverter-based resources has caused power system inertia to be unevenly distributed across power grids. As a result, certain grid regions are more vulnerable to high rate-of-change of frequency (RoCoF) during disturbances. This paper presents a measurement-based framework for estimating grid inertia in CAISO (California Independent…

Jun, 2026

ORNL Report

ORNL CESER June Monthly Highlights Report

Jun, 2026

ORNL Report

ORNL CESER May Monthly Highlights Report

May, 2026

ORNL Report

ORNL CESER April Monthly Highlights Report

Apr, 2026

Journal

Regional inertia dynamics of U.S. interconnections: An event-based measurement approach

Power grid inertia plays a vital role in frequency stability following large disturbances, yet its distribution across the U.S. grid is highly uneven. While interconnection-wide inertia benchmarks are useful, they can mask regional variability driven by resource mix, network coupling, and geographic separation. This paper extends event-driven inertia estimation to the regi…

Mar, 2026

ORNL Report

ORNL March Monthly Highlight Report – CESER

Mar, 2026

Conference Paper

Convolutional Variational Autoencoder-based Unsupervised Learning for Power Systems Faults

Classification of power system event data is a growing need, particularly where non-protective relaying-based sensors are used to monitor grid performance. Given the high burden of obtaining event data with appropriate labeling, an unsupervised approach is highly valuable. This approach enables using event data without labeling, which is far easier to obtain. This paper pr…

Mar, 2026

Conference Paper

Regional Inertia Estimation Using Actual Event Measurements: Florida Case

As inverter-based resources’ integration in power grids increases, their uneven distribution across the electrical network leads to the formation of local regions that are weakly coupled to the larger interconnection. This signifies the necessity of regional frequency dynamics investigation and analyzing various inertia metrics. This paper presents a practical methodology…

Mar, 2026

Conference Paper

Comparative Analysis of Inter-Area Oscillations in the US Eastern and Western Interconnections

This paper presents a comparative analysis of interarea oscillations in the US Eastern and Western Interconnections using frequency disturbance data collected from the advanced wide-area Frequency Monitoring Network (FNET/GridEye), enabling us to investigate and compare the oscillation characteristics of both regions. The study analyzes the statistical data from the two in…