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Cyber-physical observability for the electric grid

2020 IEEE Texas Power and Energy Conference, TPEC 2020

Jacobs, Nicholas J.; Hossain-McKenzie, Shamina S.; Summers, Adam; Jones, Christian B.; Wright, Brian J.; Chavez, Adrian R.

The penetration of Internet-of-Things (IoT) devices in the electric grid is growing at a rapid pace; from smart meters at residential homes to distributed energy resource (DER) system technologies such as smart inverters, various devices are being integrated into the grid with added connectivity and communications. Furthermore, with these increased capabilities, automated grid-support functions, demand response, and advanced communication-assisted control schemes are being implemented to improve the operation of the grid. These advancements render our power systems increasingly cyber-physical. It is no longer sufficient to only focus on the physical interactions, especially when implementing cybersecurity mechanisms such as intrusion detection systems (IDSs) and mitigation schemes that need to access both cyber and physical data. This new landscape necessitates novel methods and technologies to successfully interact and understand the overall cyber-physical system. Specifically, this paper will investigate the need and definition of cyber-physical observability for the grid.

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TYPE Conference Poster YEAR 2020
DOIOSTIScopus

Market Opportunities for Deployable Wind Systems for Defense and Disaster Response

Naughton, Brian T.; Preus, Robert; Jimenez, Tony; Whipple, Brad; Gentle, Jake

This report is the first public deliverable from the Defense and Disaster Deployable Turbine project, funded through the distributed wind portfolio of the U.S. Department of Energy Wind Energy Technologies Office. The objective of the project is to explore the opportunity for deployable turbine technologies to meet the operational energy needs of the U.S. military and global disaster response efforts. This report provides a market assessment that was conducted over a year using public reports, presentations at topical conferences, and direct stakeholder engagement interviews with both military and industry representatives. It begins with the high- level operational energy strategy of the Department of Defense that provides the context for alternatives to diesel fuel to meet energy needs. The report then provides an estimate of the energy use of the military in missions where a deployable turbine could potentially serve as an alternative to the baseline use of diesel fuel in generators to provide electricity in remote locations. An overview of domestic and international disaster response is provided with a focus on the role of the military in providing energy to those events. Finally, the report summarizes the technical considerations that would enable a deployable turbine to meet military and disaster response energy needs including the global wind resource, the technical design of the turbine, and the operational constraints of various military missions.

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TYPE SAND Report YEAR 2020
DOIOSTI

On quantum-dot lasing at gain peak with linewidth enhancement factor α H = 0

APL Photonics

Chow, Weng W.; Zhang, Zeyu; Norman, Justin C.; Liu, Songtao; Bowers, John E.

This paper describes an investigation of the linewidth enhancement factor αH in a semiconductor quantum-dot laser. Results are presented for active region parameters and laser configurations important for minimizing αH. In particular, the feasibility of lasing at the gain peak with αH = 0 is explored. The study uses a many-body theory with dephasing effects from carrier scattering treated at the level of quantum-kinetic equations. InAs quantum-dot lasers with different p-modulation doping densities are fabricated and measured to verify the calculated criteria on laser cavity design and epitaxial growth conditions.

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TYPE Journal Article YEAR 2020
DOIOSTIScopus

Surface Analysis and Hydrogen Permation Measurements for Super-Permeating Membrane Materials

Wong, Chun-Shang W.; Kolasinski, Robert K.; Whaley, Josh A.

In this report, we summarize preliminary surface characterization results for Nb surfaces, using low energy ion scattering, direct recoil spectrometry, and Auger electron spectroscopy. While most surface analysis tools cannot detect hydrogen, the low energy ion beam techniques described here are among the few techniques that are directly sensitive to it. For this study, we examined chemisorption using both molecular and atomic hydrogen (using an heated tungsten capillary to dissociate the hydrogen.) To complement these results, we have been performing ex-situ spectroscopic ellipsometry as a means of detecting the surface oxide.

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TYPE Other Report YEAR 2020
DOIOSTI
Results 16601–16800 of 96,771
Results 16601–16800 of 96,771