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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Dynamic Nonlinear Droop Control (DNDC): A Novel Primary Control Method for DC Microgrids
Not provided.
Passenger Survey - Washington DC Metrorail - 2012
The primary purposes of the survey were to update ridership by the jurisdiction of residence for use in Metrorail’s operating subsidy allocation and to collect demographic, travel, and access data for Title VI compliance, system planning, and operation analyses. It was not a customer opinion survey; the focus was on ridership and travel characteristics.
Metrobus Survey - Washington DC - 2014
The primary purposes of the survey were to update ridership by the jurisdiction of residence for use in Metrobus’ operating subsidy allocation and to collect demographic, travel, and access data for Title VI compliance, system planning, and operation analyses. It was not a customer opinion survey; the focus was on ridership and travel characteristics.
High-current DC gun for low energy RHIC cooler project
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Light and Electron Emission as Breakdown Probes: Synergistic DC and RF Study
The project was motivated by a particular and critical need in accelerator R&D to understand vacuum breakdown and arc as it would allow for developing high gradient machines. Accelerator systems operated at high gradients are less costly and more compact. This, in turn, would enable advanced and cost-effective accelerators for future colliders. Universities and medical centers would be able to build compact accelerator machines for basic X-ray and microscopy sciences, therapy, isotope production, sterilization etc.
NEXUS-DC: Nuclear Energy eXpedition for US Data Centers [Slides]
This presentation covers the growing interest in utilizing nuclear power to satisfy the increasing energy demands of data centers in the United States, emphasizing the factors that accelerate reactor deployment. It addresses clean and reliable energy needs, highlights the importance of power supply redundancy for reliability, and discusses challenges and solutions related to cooling, waste heat reuse, and techno-economics. Additionally, it includes a strength, weakness, opportunities and threat analysis and emphasizes community engagement and collaboration for accelerating regulatory approvals and reactor deployment.
Isolated DC-AC Conversion with Bidirectional Semiconductor Devices
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Modeling and Control of a Direct-Connect Medium-Voltage Storage System Featuring a Cascaded DC Subsystem
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Sandia's Redesigned Pressure Chamber for the Characterization of Zener DC Voltage Standards
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Retarding Field Energy Analyzer Based Analysis of DC Sputtered High Performance MoS2 Tribological Coatings
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Particle-in-cell simulations of the anode sheath in dc discharges
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Scalable Hybrid Large-Scale dc-ac Grid Analysis Methods (Phase II)
The goals of the project included the identification and evaluation of a voltage source converter multiterminal high-voltage direct current (VSC-MTdc) system architecture suitable for a high amount of power transfer through long transmission lines.
DC Fast Charging Test Procedures
This report has been drafted as an initial effort to develop a standardized test procedure for DCFC for LD EVs. The proposed test procedures are designed to be time-efficient, aligned with EV discharge tests, and practical to implement, thereby minimizing the testing and computational efforts required by OEMs and testing authorities.
Probing μeV Dynamic Spin Interactions with Spin-Polarized DC Scanning Tunneling Spectroscopy
Invited talk at SpinQuest: Ascona, Switzerland
EV-EVSE Fault Study: An Analysis of Thermal Events Caused by Electrical Faults during DC Charging
This report outlines multiple avenues of analysis of electrical faults associated with electric vehicles (EVs) during charging, focusing specifically on the interactions between EVs and EV supply equipment (EVSE). Key concerns include the identification and mitigation of overtemperature events that can result in fires, which are commonly initiated by localized heating of connectors, wiring, or high-impedance fault current paths.
Novel three-in-one high-temperature-superconducting DC cables for grid revolution
Abstract not provided.
Performance Characterization of InCharge™ ICE-66 V2X Bidirectional DC Fast Charger
Vehicle-to-grid (V2G) technology extends the role of Plug-in Hybrid Vehicle’s (PHEV) and Battery Electric Vehicle’s (BEV) batteries beyond transportation by enabling bidirectional power transfer between the vehicle's onboard energy storage and the utility grid. Modern battery-powered vehicles are equipped with high-capacity battery packs that remain stationary and underutilized for the majority of their operational life. A vehicle used for daily commuting may be parked and connected to charging infrastructure for 18–20 hours per day, representing a significant untapped energy resource. When considered at scale, the aggregated storage capacity of a modest fleet of 10–15 vehicles within a single parking facility can reach the MWh range, sufficient to partially offset peak demand for a mid-size commercial building or contribute meaningful ancillary services to the local grid. The ability to charge during off-peak periods when electricity prices are low and discharge during peak demand when prices are high positions EV batteries as distributed energy arbitrage assets, with the potential to offset vehicle ownership and charging costs. Beyond energy arbitrage, V2G-capable assets can provide ancillary grid services through active and reactive power injections. Active power supports grid frequency regulation, while reactive power supports local voltage regulation. Together, these capabilities establish V2G as a technically promising and economically relevant pathway toward greater integration of battery-powered vehicles into the broader energy system.