106 citations · 248 across the 32 of their papers we have counts for
38 papers
Tutorial: Grid-Following Inverter for Electrical Power Grid
Muhammad Hamza Ali, Amritanshu Pandey
The growing use of inverter-based resources in modern power systems has made grid-following inverters a central topic in power-system modeling, control, and simulation. Despite the…
Frequency-Aware Sparse Optimization for Diagnosing Grid Instabilities and Collapses
Swadesh Vhakta, Denis Osipov, Reetam Sen Biswas +3
This paper aims to proactively diagnose and manage frequency instability risks from a steady-state perspective, without the need for derivative-dependent transient modeling. Specif…
Large-scale Grid Optimization: The Workhorse of Future Grid Computations
Amritanshu Pandey, Mads Almassalkhi, Sam Chevalier
Purpose: The computation methods for modeling, controlling and optimizing the transforming grid are evolving rapidly. We review and systemize knowledge for a special class of compu…
Contingency Analyses with Warm Starter using Probabilistic Graphical Model
Shimiao Li, Amritanshu Pandey, Larry Pileggi
Cyberthreats are an increasingly common risk to the power grid and can thwart secure grid operations. We propose to extend contingency analysis to include cyberthreat evaluations.…
Tutorial: Circuit-based Electromagnetic Transient Simulation
Amritanshu Pandey
The growing penetration of inverter-based resources and associated controls necessitates system-wide electromagnetic transient (EMT) analyses. EMT tools and methods today were not…
Actionable Three-Phase Infeasibility Optimization with Varying Slack Sources
Elizabeth Foster, Timothy McNamara, Amritanshu Pandey +1
Modern distribution grids that include numerous distributed energy resources (DERs) and battery electric vehicles (BEVs) will require simulation and optimization methods that can c…
Continuous Switch Model and Heuristics for Mixed-Integer Problems in Power Systems
Aayushya Agarwal, Amritanshu Pandey, Larry Pillegi
Many power systems operation and planning computations (e.g., transmission and generation switching and placement) solve a mixed-integer nonlinear problem (MINLP) with binary varia…
Towards Practical Physics-Informed ML Design and Evaluation for Power Grid
Shimiao Li, Amritanshu Pandey, Larry Pileggi
When applied to a real-world safety critical system like the power grid, general machine learning methods suffer from expensive training, non-physical solutions, and limited interp…
Circuit-theoretic Line Outage Distribution Factor
Shimiao Li, Amritanshu Pandey, Larry Pileggi
This work presents the design of AC line outage distribution factor created from the circuit-theoretic power flow models. Experiment results are shown to demonstrate its efficacy i…
A Risk-Managed Steady-State Analysis to Assess the Impact of Power Grid Uncertainties
Naeem Turner-Bandele, Amritanshu Pandey, Larry Pileggi
Electricity systems are experiencing increased effects of randomness and variability due to emerging stochastic assets. The increased effects introduce new uncertainties into power…
Two-Stage Homotopy Method to Incorporate Discrete Control Variables into AC-OPF
Timothy McNamara, Amritanshu Pandey, Aayushya Agarwal +1
Alternating-Current Optimal Power Flow (AC-OPF) is an optimization problem critical for planning and operating the power grid. The problem is traditionally formulated using only co…
Three-Phase Infeasibility Analysis for Distribution Grid Studies
Elizabeth Foster, Amritanshu Pandey, Larry Pileggi
With the increase of distributed energy resources in the distribution grid, planning to ensure sufficient infrastructure and resources becomes critical. Planning at the distributio…
A Convex Method of Generalized State Estimation using Circuit-theoretic Node-breaker Model
Shimiao Li, Amritanshu Pandey, Larry Pileggi
An accurate and up-to-date topology is critical for situational awareness of a power grid; however, wrong switch statuses due to physical damage, communication error, or cyber-atta…
Practical Adoption of Cloud Computing in Power Systems- Drivers, Challenges, Guidance, and Real-world Use Cases
Song Zhang, Amritanshu Pandey, Xiaochuan Luo +5
Motivated by The Federal Energy Regulatory Commission's (FERC) recent direction and ever-growing interest in cloud adoption by power utilities, a Task Force was established to assi…
Analytical Inverter-Based Distributed Generator Model for Power Flow Analysis
Naeem Turner-Bandele, Amritanshu Pandey, Larry Pileggi
Quantifying the impact of inverter-based distributed generation (DG) sources on power-flow distribution system cases is arduous. Existing distribution system tools predominately mo…
Combined Transmission and Distribution State-Estimation for Future Electric Grids
Amritanshu Pandey, Shimiao Li, Larry Pileggi
Proliferation of grid resources on the distribution network along with the inability to forecast them accurately will render the existing methodology of grid operation and control…
Fast AC Steady-State Power Grid Simulation and Optimization Using Prior Knowledge
Aayushya Agarwal, Amritanshu Pandey, Larry Pileggi
Fast and accurate optimization and simulation is widely becoming a necessity for large scale transmission resiliency and planning studies such as N-1 SCOPF, batch contingency solve…
Dynamic Graph-Based Anomaly Detection in the Electrical Grid
Shimiao Li, Amritanshu Pandey, Bryan Hooi +2
Given sensor readings over time from a power grid, how can we accurately detect when an anomaly occurs? A key part of achieving this goal is to use the network of power grid sensor…
A WLAV-based Robust Hybrid State Estimation using Circuit-theoretic Approach
Shimiao Li, Amritanshu Pandey, Larry Pileggi
For reliable and secure power grid operation, AC state-estimation (ACSE) must provide certain guarantees of convergence while being resilient against bad-data. This paper develops…
Incremental Model Building Homotopy Approach for Solving Exact AC-Constrained Optimal Power Flow
Amritanshu Pandey, Aayushya Agarwal, Larry Pileggi
Alternating-Current Optimal Power Flow (AC-OPF) is framed as a NP-hard non-convex optimization problem that solves for the most economical dispatch of grid generation given the AC-…
A LASSO-Inspired Approach for Localizing Power System Infeasibility
Shimiao Li, Amritanshu Pandey, Aayushya Agarwal +2
A method is proposed to identify and localize the cause of network collapse with augmented power flow analysis for a grid model with insufficient resources. Owing to heavy network…
A Circuit-Theoretic Approach to State Estimation
Shimiao Li, Amritanshu Pandey, Soummya Kar +1
Traditional state estimation (SE) methods that are based on nonlinear minimization of the sum of localized measurement error functionals are known to suffer from non-convergence an…
SUGAR-R: Robust Online Restoration Platform for SCADA-Absent Grid
Amritanshu Pandey, Aayushya Agrawal, Marko Jereminov +1
Secure and fast grid restoration from a collapsed state is increasingly critical as blackouts are becoming more prevalent around the globe. Generally, the restoration of grid durin…
Implicitly Modeling Frequency Control within Power Flow
Aayushya Agarwal, Amritanshu Pandey, Marko Jereminov +1
In this paper, we extend a circuit-based, current-voltage power flow formulation to include frequency deviations and implicitly model generator primary and secondary control action…