Showing 26 results for Author: Gary Hahn
Sep, 2026
ORNL Report
This report presents results from stress, resilience, and timing-tamper tests against Cyber Grid Guard (CGG), a system for data attestation using distributed ledger technology (DLT). The configuration of CGG under test targets substation Modbus data and uses Hyperledger Fabric for the DLT. Testing covered four scenarios. These were longevity under continuous operation (S1)…
Jun, 2026
Journal
Modern electrical grids face growing stability risks from customer-owned generators, especially at points of common couplings (PCCs). Disruptive behavior from power-electronic sources can cause protective relays to isolate problematic generators, making measurement integrity critical. This article presents a distributed ledger technology (DLT) approach that uses smart cont…
Mar, 2026
ORNL Report
Phase IV of the DarkNet project, spearheaded by Oak Ridge National Laboratory (ORNL), focused on significant advancements in the Cyber Grid Guard (CGG) framework through the integration of Distributed Ledger Technology (DLT). Building on the foundational work from previous phases, this phase aimed at deploying the enhanced framework in operational environments, addressing…
Jun, 2025
ORNL Report
In this study is presented two power system applications with distributed ledger technology (DLT) and smart contracts (SC) that were assessed in a Cyber-Grid-Guard System (CGGS) advanced testbed, with protective relays, power meters, communication devices, DLT devices, synchronized time source, clock displays and real time simulator. This CGGS testbed was set in the Advanc…
May, 2025
Book Chapter
Electrical utility substations are wired with intelligent electronic devices (IEDs), such as protective relays, power meters, and communication switches. Substation engineers commission these IEDs to assess the appropriate measurements for monitoring, control, power system protection, and communication applications. Like real electrical utility substations, complex electri…
Dec, 2024
ORNL Report
This report presents a successful technical learning integration of student interns in the Advanced Protection Laboratory space, located in the Grid Research Integration and Deployment Center (GRID-C) at the Department of Energy’s (DOE’s) Oak Ridge National Laboratory (ORNL). The Advanced Protection Laboratory was created for the primary goal of supporting DOE’s research p…
Oct, 2024
Journal
In modern electrical grids, the numbers of customer-owned distributed energy resources (DERs) have increased, and consequently, so have the numbers of points of common coupling (PCC) between the electrical grid and customer-owned DERs. The disruptive operation of and out-of-tolerance outputs from DERs, especially owned DERs, present a risk to power system operations. A com…
Aug, 2024
Journal
Modern electrical grids have intelligent electronic devices (IEDs) such as protective relays that use internal logic to detect the types of electrical faults. The increasing integration of distributed energy sources and the resulting complexity of electrical grid communication architectures necessitates enhanced robustness of IEDs’ monitoring while maintaining security aga…