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Search Publications by

Dhananjay Anand (IntlAssoc)

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Displaying 1 - 25 of 25

Summary Report on NIST Smart Grid Testbeds and Collaborations Workshops

March 3, 2021
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
Dhananjay 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
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 10, 2020
Dhananjay 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 13, 2020
Dhananjay 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
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
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
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
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
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
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
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
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
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

Synchrophasor Data Quality Attributes and a Methodology for Examining Data Quality Impacts upon Synchrophasor Applications

March 14, 2017
Dhananjay Anand, Allen R. Goldstein, Alison Silverstein, Laurie Miller, Francis Tuffner, Yuri Makarov
Data from synchrophasor devices like phasor measurement units (PMU) is increasingly being used to enhance and improve power grid operations, analysis, and planning applications. However, PMU data often arrive at the application with a variety of data

Timing Challenges in the Smart Grid

January 19, 2017
YaShian Li-Baboud, Cuong T. Nguyen, Marc A. Weiss, Dhananjay Anand, Allen R. Goldstein, Jason Allnutt, Bob Noseworthy, Ravi Subramaniam
Correct time and timing is one of the foundational elements in enabling the communication and orchestration of technologies for accurate and optimal wide area monitoring, protection and control in the power industry. NIST and IEEE-SA conducted a workshop

Multicast Delayed Authentication For Streaming Synchrophasor Data in the Smart Grid

May 30, 2016
Sergio Camara, Dhananjay Anand, Victoria Yan Pillitteri, Luiz F. Carmo
Multicast authentication of synchrophasor data is challenging due to the design requirements of Smart Grid monitoring systems such as low security overhead, tolerance of lossy networks, time-criticality and high data rates. In this work, we propose inf

Detecting GNSS Spoofing using a Network of Hardware Oscillators

March 11, 2016
Dhananjay Anand, Tanvir M. Arafin, Gang Qu
In the face of growing concern about spoofing attacks on GNSS transmissions, we propose a scheme to cross validate GNSS based timing against intrinsic properties of local hardware oscillators. We demonstrate our approach as being able to detect certain

Investigation of PMU Response to Leap Second: 2015

August 24, 2015
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

A Cybersecurity Testbed for Industrial Control Systems

October 9, 2014
Richard Candell, Keith A. Stouffer, Dhananjay Anand
The National Institute of Standards and Technology (NIST) is developing a cybersecurity testbed for industrial control systems (ICS). The goal of this testbed is to measure the performance of an ICS when instrumented with cybersecurity protections in