Aug, 2026
Conference Paper
Publications
Showing 74 results for Author: Ben B. Ollis
Mar, 2026
Conference Paper
Electromagnetic Transient Simulation of Photovoltaic Inverter Using Implicit-Explicit Solver
This paper introduces the implementation of electromagnetic transient (EMT) simulations of a photovoltaic (PV) inverter module using the Implicit-Explicit (ImEx) solver in the Suite of Nonlinear and Differential/Algebraic Equation Solvers (SUNDIALS). This study demonstrates the effectiveness of the ImEx solver in overcoming the challenges inherent in simulating the complex…
Mar, 2026
Conference Paper
Combined Effects of Electric Vehicle Charging and Rooftop Solar Integration on Voltage Imbalance in Residential Distribution Networks
Residential electric vehicle (EV) chargers, as single phase loads, contribute to unbalanced voltage drops across phases, while rooftop solar systems, as single phase generators, can exacerbate voltage imbalance by causing unbalanced voltage increases. This paper investigates combined effects of residential EV charging and rooftop solar generation on voltage imbalance in re…
Mar, 2026
Conference Paper
Optimal Sizing of Energy Storage for Community Microgrids Considering Building Thermal Dynamics
This paper proposes an optimization model for the optimal sizing of energy storage in community microgrids considering the building thermal dynamics and customer comfort preference. The proposed model minimizes the annualized cost of the community microgrid, including energy storage investment, purchased energy cost, demand charge, energy storage degradation cost, voluntar…
Mar, 2026
Conference Paper
A Networked Microgrid Framework and Testbed for Communication, Controls, and Optimization Testing
This paper presents the development and experimental results of a networked AC microgrid testbed located at Oak Ridge National Laboratory. The testbed comprises two, 480V three-phase, four wire microgrids designed to operate standalone, grid-tied, or as a network of microgrids. This testbed represents both the state of the industry, by incorporating grid-assets commonly fo…
Aug, 2025
ORNL Report
Resilient Operation of Networked Community Microgrids with High Solar Penetration
Jan, 2025
Journal
Optimal Network Reconfiguration and Scheduling With Hardware-in-the-Loop Validation for Improved Microgrid Resilience
With the increased occurrence of various major extreme weather events, power outages and prompt power system restorations have recently drawn more attention to the resilience and recovery of power systems. From the perspective of a more resilient power delivery at the distribution grid, system restoration using network topology reconfiguration together with optimal schedul…
Oct, 2024
Journal
Demand response for frequency regulation: Research continuity and knowledge gaps
Frequency regulation is an increasingly important task in the presence of intermittent renewable generation and growing loads in the distribution energy systems. Some of the frequency regulation can be provided by leveraging demand response, relieving the pressure to build additional generating assets. The use of demand response for frequency regulation services has given…