An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Aaron Johnson, Iosif Isaakovich Shinder, Rodney A. Bryant, JohnPaul R. Abbott, Keith A. Gillis, Joey Boyd, James Filla, Michael R. Moldover
Accurate flow measurements are essential to quantify the amount of greenhouse gases (GHGs) and other pollutants emitted from power plant stacks. Although protocols have been developed, the uncertainty of stack flow measurements has not been documented.
Clocks are deeply integrated into practically every cyber-physical system either explicitly as provenance for time-triggered actions, or implicitly in cases where cyber components operate in lock step with physical dynamics. Recognizing the criticality of
The first synchrophasor standard was published in 1995. The standard was revised in 2001, 2005, 2011, and 2014 with evolving performance requirements. In 2012 NIST began assessing the performance of PMUs, both commercially available and pre-production
Aaron N. Johnson, Rodney A. Bryant, Tamae M. Wong, James R. Whetstone, Eric Harman, Woong Kang, Keith A. Gillis, Hsin-Hung Lee, Iosif I. Shinder, Liang Zhang
On April 20-21, 2015, NIST hosted a workshop that, through measurement science, enabled the owners of stationary sources (primarily the electric power industry) and their regulatory agencies (federal and state) to better characterize greenhouse gas (GHG)
There has been a growing interest in the deployment of Phasor Measurement Units (PMUs) not only in high-voltage transmission, but in lower-voltage distribution systems. For a Distributed Generation (DG) grid this would require deployment of PMUs at
Allen R. Goldstein, Dhananjay Anand, YaShian Li-Baboud
Between 22:30:00 June 30, 2015, and 00:30:00 July 2, 2015, UTC, the National Institute of Standards and Technology (NIST) tested eight Phasor Measurement Units (PMUs) to investigate their response to the leap second adjustment to UTC which occurred
Paul Moulema, Wei Yu, David W. Griffith, Nada T. Golmie
The smart grid is a complex system that comprises components from both the power grid and communication networks. To understand the behavior of such a complex system, co-simulation is a viable tool to capture the interaction and the reciprocal effects
Aaron N. Johnson, Joey T. Boyd, Eric Harman, Mohammad M. Khalil, Jacob E. Ricker, Christopher J. Crowley, Rodney A. Bryant, Iosif I. Shinder
The amount of CO 2 emitted from a coal-fired power plant (CFPP) is measured by continuous emissions monitoring systems (CEMS) permanently installed in the exhaust smokestack. Both the CO 2 concentration and the bulk flow are continuously measured by CEMS
Real-time electricity monitoring in residences is a growing market, with a number of systems being commercialized that provide feedback to occupants on electrical power and energy consumption. These systems are also useful for research purposes, by better
Xing Chen, Wei Yu, David W. Griffith, Nada T. Golmie, Guobin Xu, Chao Lu
Recently, there are growing concerns about smart grid security and resilience. The performance of smart grid may suffer from component failures or targeted attacks. A sophisticated adversary may target critical components in a smart grid, leading to
Wei Yu, David W. Griffith, Linqiang Ge, Sulabh Bhattarai, Nada T. Golmie
The smart grid is a new type of power grid that will use the advanced communication network technologies to support more efficient energy transmission and distribution. The grid infrastructure was designed for reliability; but security, especially against
Most types of refrigerating appliances are rated according to an established test procedure and their energy use is regulated by the US Department of energy. These products are generally built around a vapor compression system that is used to maintain a
Lee J. Gorny, Keith A. Gillis, Michael R. Moldover
As a part of NISTs program to standardize measurements of greenhouse gas emissions, we are developing long-wavelength acoustic flowmeter (LWAF) for accurate, economical measurement of flue gas flows, for example, from coal-burning power plants. A LWAF is
Christophe Martinsons, Yuqin Zong, C Cameron Miller, Yoshi Ohno
Specific issues appear in the measurement of the electrical power of AC-powered LED lamps and luminaires because they often generate harmonic currents in a wide frequency range. The topic of this paper is to clarify the impact of these harmonic currents on
As the electric power grid is changing to a smarter more dynamically controlled system, there is increasing need for measurements that show the global status of the system for wide-area monitoring and control. These measurements require time
Karl Hobart, Eugene Imhoff, F. J. Kub, Allen R. Hefner Jr., Tam H. Duong, Jose M. Ortiz, Sei-Hyung Ryu, David Grider, Scott G. Leslie, Jerry Sherbondy, B Ray
Transient liquid phase (TLP) bonding is an advanced die-attach technique for wide-bandgap power semiconductor and high-temperature packaging. TLP bonding advances current soldering techniques by raising the melting point to over 500 °C without detrimental
The National Institute of Standards and Technology (NIST) has efforts underway to accelerate the international development of interoperability standards to support the future modernized Smart Grid electric grid or energy delivery network characterized by
SangHyun S. Lim, Thomas M. Wallis, Atif A. Imtiaz, Dazhen Gu, Pavel Kabos, Pavol Krivosik
We compared three electrical detection techniques; differential resistance (dV/dI), RF/microwave transmission, and spin rectification measurements for magnetization dynamics in individual patterned sub-micron structures. Different electrical techniques
Nanying Yang, Jose M. Ortiz, Tam H. Duong, Allen R. Hefner Jr., Kathleen Meehan
The CoolMOSTM transistor is a novel power MOSFET type device that utilizes a super-junction embedded within its drift region in order to improve the trade-off between on-resistance and breakdown voltage. The super-junction results in unique inter-electrode
David A. Wollman, Gerald FitzPatrick, Paul A. Boynton, Thomas L. Nelson
The National Institute of Standards and Technology has efforts underway to accelerate the development of interoperability standards to support the future modernized "Smart Grid" electric grid or energy delivery network characterized by a two-way flow of