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Displaying 1 - 25 of 33

Synchronization and Coexistence in Quantum networks

March 27, 2023
Author(s)
Ivan Burenkov, Alexandra Semionova, FNU Hala, Thomas Gerrits, Anouar Rahmouni, DJ Anand, Ya-Shian Li-Baboud, Oliver T. Slattery, Abdella Battou, Sergey Polyakov
We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum DWDM channels coexisting

White Rabbit-assisted quantum network node synchronization with quantum channel coexistence

May 7, 2022
Author(s)
Thomas Gerrits, Ivan Burenkov, Ya-Shian Li-Baboud, Anouar Rahmouni, DJ Anand, FNU Hala, Oliver T. Slattery, Abdella Battou, Sergey Polyakov
We show that the Ethernet-based time transfer protocol 'White Rabbit' can synchronize two distant quantum-networked nodes to within 4 ps, enabling HOM interference at >90 % visibility using 17.6 ps FWHM single-photons coexisting with White Rabbit.

IEC 61850 Profile for Distributed Energy Resources Supporting IEEE 1547

May 4, 2022
Author(s)
Hasan Giray Oral, DJ Anand, Cuong Nguyen, Avi Gopstein, Christoph Brunner, Alexander Apostolov
This document provides an IEC 61850 profile for a Distributed Energy Resource supporting IEEE 1547 and the grid support functions therein. The profile utilizes the IEC 61850 data object model and maps the requirements of IEEE 1547 to the data object model

Use of Traveling Wave Signatures in Medium Voltage Distribution Systems for fault detection and location

August 17, 2021
Author(s)
DJ Anand, Avi Gopstein, Kumaraguru Prabakar, Lucas Monzon, Akanksha Singh, Matthew Reynolds, Yashwanth Nag Velaga, Jonathan Maack, Soumya Tiwari, Jina Roy, Colin Tombari, Ismael Mendoza Carrillo, Xinshuo Yang, Spatika Iyengar, William John
Protection systems are a critical feature for the proper operation of an electric grid. Protection systems should be able to quickly detect, identify, locate, and isolate the faults within a time frame that prevents damage to grid components and reduces

Summary Report on NIST Smart Grid Testbeds and Collaborations Workshops

March 3, 2021
Author(s)
Avi Gopstein, Allen R. Goldstein, Dhananjay Anand, Paul A. Boynton
This report captures feedback from two workshops that NIST conducted to determine the challenges and opportunities in the use and design of Smart Grid Testbeds and Collaborations, which were held April 11, 2019, at the University of Tennessee, Knoxville

Characterization of residential circuit impedance

February 17, 2021
Author(s)
DJ Anand, Md Amimul Ehsan, Wenqi Guo
Electrical harmonics associated with switching power electronics have been observed to induce electromagnetic interference with equipment sharing the same electrical circuit, some research studies have documented cases of malfunction and even damage of

Design and Capabilities of the Assistive Clock Fusion Testbed

February 4, 2021
Author(s)
Dhananjay Anand
The National Institute of Standards and Technology (NIST) has been working with industry and academia to develop algorithms and technologies to improve the resilience of timing subsystems used in high-performance sensing and control hardware. Resilience

Hierarchical, grid-aware, and economically optimal coordination of distributed energy resources in realistic distribution systems

December 9, 2020
Author(s)
DJ Anand, Mads Almassalkhi, Sarnaduti Brahma, Nawaf Nazir, Hamid Ossareh, Pavan Racherla, Soumya Kundu, Sai Pushpak Nandanoori, Thiagarajan Ramachandran, Ankit Singhal, Dennice Gayme, Chengda Ji, Enrique Mallada, Yue Shen, Pengcheng You
Forward-looking renewable portfolio standards will lead to extreme levels of variable solar PV in electric distribution systems, which makes reliability more challenging to maintain for distribution system operators (DSOs). To facilitate reliability under

Overshoot Mitigation Using the Reference Governor Framework

January 12, 2020
Author(s)
DJ Anand, Hamid Ossareh, Collin Freiheit
This paper presents a novel reference governor scheme for overshoot mitigation in a tracking control system. Our proposed scheme, referred to as the Reference Governor with DynamicConstraint (RG-DC), recasts the overshoot mitigation problem as a constraint

A timing impairment module for electrical synchrometrology.

October 31, 2019
Author(s)
Dhananjay Anand, Marc A. Weiss, Kishan Shenoi
Accurate time is frequently cited as an enabling requirement for precisely coordinated control systems used in the electrical power system. Methods and technologies to evaluate the impact of impaired time accuracy on these control systems are frequently

A demonstration of Low Power Wide Area Networking for city-scale monitoring applications

September 25, 2019
Author(s)
Sebastian Barillaro, Dhananjay Anand, Avi Gopstein, Julian Barillaro
Networks of sensors are key components of an Internet of Things. This paper outlines a demonstration of a wireless technology called LoRa/LoRaWAN that may be used to network sensors over a range of several kilometers. LoRa is an example of a Low Power Wide

Compositional models for power systems

September 8, 2019
Author(s)
Dhananjay Anand, Blake S. Pollard, Spencer J. Breiner, John S. Nolan, Eswaran Subrahmanian
The problem of integrating multiple overlapping models and data is pervasive in engineering, though often implicit. We consider this issue of model management in the context of the electrical power grid, as it transitions from centralized generation with

NIST Smart Grid Interoperability Test Tools

February 8, 2019
Author(s)
Dhananjay Anand, Kevin G. Brady, Yuyin Song, Cuong T. Nguyen, Kang B. Lee, Gerald J. FitzPatrick, Allen R. Goldstein, YaShian Li-Baboud
The National Institute of Standards and Technology (NIST), participated in the Universal Communication Architecture International User Group (UCAIug) Interoperability (IOP) Test Event on October 14-19, 2017 in New Orleans, Louisiana. The objective of the

A Calibration of Timing Accuracy in the NIST Cyber-Physical Systems Testbed

December 18, 2018
Author(s)
Marc A. Weiss, YaShian Li-Baboud, Dhananjay Anand, Kevin G. Brady, Paul A. Boynton, Cuong T. Nguyen, Martin J. Burns, Avi M. Gopstein
We propose a general methodology for assessing the time accuracy and uncertainties and report results from a project to calibrate timing in the NIST CPS and Smart Grid Testbeds. We measured clock synchronization accuracy and stability as well as latencies

A Calibration of Timing Accuracy in NIST Cyber-Physical Systems Testbed

October 3, 2018
Author(s)
Marc A. Weiss, Ya-Shian Li-Baboud, Dhananjay Anand, Paul A. Boynton, Kevin Gerard Brady, Martin Burns
We report results from a project to calibrate timing in the NIST CPS and Smart Grid Testbeds. We measured clock synchronization accuracy and stability as well as latencies for potential experiments in the testbeds. We determined calibrations of GPS

Measurement Tools for Substation Equipment: Testing the Interoperability of protocols for Time Transfer and Communication

October 3, 2018
Author(s)
Dhananjay Anand, YaShian Li-Baboud, Kevin G. Brady, Yuyin Song, Kang Lee, Cuong Nguyen, Gerald FitzPatrick, Allen R. Goldstein
A test harness was designed and developed at the National Institute of Standards and Technology (NIST) to study the interoperability of the Precision Timing Protocol-Power Profile (PTP) and other communication standards for substation automation

TMA: An Efficient Timestamp-Based Monitoring Approach to Test Timing Constraints of Cyber-Physical Systems

June 29, 2018
Author(s)
Mohammadreza Mehrabian, Mohammad Khayatian, Ahmed Mousa, Aviral Shrivastava, Patricia Derler, Ya-Shian Li-Baboud, Dhananjay Anand, Edward Griffor, Hugo Andrade, John Eidson
Formal specifications on temporal behavior of Cyber-Physical Systems (CPS) is essential for verification of performance and safety. Existing solutions for verifying the satisfaction of temporal constraints on a CPS are compute and resource intensive since

Conflict-driven Hybrid Observer-based Anomaly Detection

June 25, 2018
Author(s)
Dhananjay Anand, Zheng Wang, Dawn Tilbury, James Moyne, CheeYee Tang
This paper presents an anomaly detection method using a hybrid observer – comprised of state observers for both discrete and continuous states. We focus our attention on anomalies caused by intelligent attacks that use knowledge of the system behavior to