SEARCH · Search NASA
Results for “aggregation”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Molecular Simulation of Nanoparticle-Nanopore Interactions: Adsorption Aggregation and Fracture.
Abstract not provided.
Impact of Aggregated PV on Subsynchronous Torsional Interaction
This paper investigates induced oscillation (specifically subsynchronous torsional interactions) in power systems arising from photovoltaic (PV) power modulation. Time domain simulations of a modified IEEE first-benchmark system are presented and analyzed. In the IEEE benchmark system, a PV generator was added at the same bus where the synchronous generator is connected. The impact of different parameters of the PV inverters’ volt-volt-ampere reactive (volt-var) curve on SSTI is examined. The most severe impact found arises from the time response of the inverter’s reactive power change. A second-order time response with natural frequency matching the rotor speed deviation oscillation frequency and low-damping ratio quickly drives the system to an unstable region. Although it is highly unlikely that conditions necessary for distributed energy resource-induced oscillations would occur in the field, with knowledge of this vulnerability in mind, inverters' control parameters can be designed to avoid it.
Multi-Label Visual Feature Learning with Attentional Aggregation
Explore the source record for details and available documents.
Real-time Dispatching for Energy Aggregators with Energy Storage and Stochastic Renewable Generation in Markets.
Abstract not provided.
Solution-processed OLED lighting devices using supramolecular aggregates of pigments
Explore the source record for details and available documents.
Simulation of Ion Transport through Percolated Aggregates in Precise Sulfophenylated Polyethylene Ionomers.
Abstract not provided.
Molecular Simulation of Nanoparticle-Nanopore Interactions: Adsorption Aggregation and Fracture.
Abstract not provided.
Optimization-Based Model Calibration for Aggregated Distributed Energy Resources
Explore the source record for details and available documents.
Microstructural characterization of neutron irradiated mineral concrete aggregates
Explore the source record for details and available documents.
4-D aggregate deconvolution for aerial measurements, RSLN-026-21, Year 2
Presentation to be presented during the Site-Directed Research and Development (SDRD) program FY 2021 review meeting (Webex), September 22–23, 2021.
Molecular Dynamics Simulations of Percolated Ionic Aggregates in PreciseSulfophenylated Polyethylene Polymers.
Abstract not provided.
Ionic Aggregate Morphology and Ion Transport in Single-Ion Conducting Polymers.
Abstract not provided.
Vapor Condensation and Coating Evaporation Are Both Responsible for Soot Aggregate Restructuring
Explore the source record for details and available documents.
Reassessing the Significance of Reduced Aggregation and Crystallinity of Naphthalene Diimide-Based Copolymer Acceptors in All-Polymer Solar Cells
Explore the source record for details and available documents.
Cluster Assemblies Produced by Aggregation of Preformed Ag Clusters in Ionic Liquids
Explore the source record for details and available documents.
Multi-Modal Characterization of Aggregates in Concrete via EDS and Raman imaging
Explore the source record for details and available documents.
Assessment of Neutron Irradiation Damage in Aggregates
Explore the source record for details and available documents.