Search Results for author: Carleton Coffrin

Found 20 papers, 11 papers with code

Managing power balance and reserve feasibility in the AC unit commitment problem

no code implementations30 Mar 2024 Robert Parker, Carleton Coffrin

Incorporating the AC power flow equations into unit commitment models has the potential to avoid costly corrective actions required by less accurate power flow approximations.

Security Constrained Optimal Power Shutoff

no code implementations26 Apr 2023 Noah Rhodes, Carleton Coffrin, Line Roald

To address this gap, we propose the Security-Constrained Optimal Power Shutoff (SC-OPS) problem which uses post-contingency security constraints to model the impact of unexpected line faults when planning a PSPS.

PowerModelsADA: A Framework for Solving Optimal Power Flow using Distributed Algorithms

1 code implementation2 Apr 2023 Mohannad Alkhraijah, Rachel Harris, Carleton Coffrin, Daniel K. Molzahn

This paper presents PowerModelsADA, an open-source framework for solving Optimal Power Flow (OPF) problems using Alternating Distributed Algorithms (ADA).

Recursive Restoration Refinement: A Fast Heuristic for Near-Optimal Restoration Prioritization in Power Systems

no code implementations5 Apr 2022 Noah Rhodes, Carleton Coffrin, Line Roald

The prioritization of restoration actions after large power system outages plays a key role in how quickly power can be restored.

High-quality Thermal Gibbs Sampling with Quantum Annealing Hardware

no code implementations3 Sep 2021 Jon Nelson, Marc Vuffray, Andrey Y. Lokhov, Tameem Albash, Carleton Coffrin

This work builds on those insights and identifies a class of small hardware-native Ising models that are robust to noise effects and proposes a procedure for executing these models on QA hardware to maximize Gibbs sampling performance.

Combinatorial Optimization Vocal Bursts Intensity Prediction

Single-Qubit Fidelity Assessment of Quantum Annealing Hardware

1 code implementation7 Apr 2021 Jon Nelson, Marc Vuffray, Andrey Y. Lokhov, Carleton Coffrin

Overall, the proposed QASA protocol provides a useful tool for assessing the performance of current and emerging quantum annealing devices.

Programmable Quantum Annealers as Noisy Gibbs Samplers

no code implementations16 Dec 2020 Marc Vuffray, Carleton Coffrin, Yaroslav A. Kharkov, Andrey Y. Lokhov

Drawing independent samples from high-dimensional probability distributions represents the major computational bottleneck for modern algorithms, including powerful machine learning frameworks such as deep learning.

A Flexible Storage Model for Power Network Optimization

1 code implementation29 Apr 2020 Frederik Geth, Carleton Coffrin, David M Fobes

This paper proposes a simple and flexible storage model for use in a variety of multi-period optimal power flow problems.

Scheduling

PowerModelsRestoration.jl: An Open-Source Framework for Exploring Power Network Restoration Algorithms

1 code implementation27 Apr 2020 Noah Rhodes, David Fobes, Carleton Coffrin, Line Roald

With the escalating frequency of extreme grid disturbances, such as natural disasters, comes an increasing need for efficient recovery plans.

PowerModelsDistribution.jl: An Open-Source Framework for Exploring Distribution Power Flow Formulations

1 code implementation20 Apr 2020 David M. Fobes, Sander Claeys, Frederik Geth, Carleton Coffrin

In this work we introduce PowerModelsDistribution, a free, open-source toolkit for distribution power network optimization, whose primary focus is establishing a baseline implementation of steady-state multi-conductor unbalanced distribution network optimization problems, which includes implementations of Power Flow and Optimal Power Flow problem types.

Computational Engineering, Finance, and Science Systems and Control Signal Processing Systems and Control

Juniper: An Open-Source Nonlinear Branch-and-Bound Solver in Julia

2 code implementations19 Apr 2018 Ole Kröger, Carleton Coffrin, Hassan Hijazi, Harsha Nagarajan

Nonconvex mixed-integer nonlinear programs (MINLPs) represent a challenging class of optimization problems that often arise in engineering and scientific applications.

Optimization and Control

PowerModels.jl: An Open-Source Framework for Exploring Power Flow Formulations

2 code implementations6 Nov 2017 Carleton Coffrin, Russell Bent, Kaarthik Sundar, Yeesian Ng, Miles Lubin

This work provides a brief introduction to the design of PowerModels, validates its implementation, and demonstrates its effectiveness with a proof-of-concept study analyzing five different formulations of the Optimal Power Flow problem.

Optimization and Control Computational Engineering, Finance, and Science

Evaluating Ising Processing Units with Integer Programming

no code implementations2 Jul 2017 Carleton Coffrin, Harsha Nagarajan, Russell Bent

The recent emergence of novel computational devices, such as adiabatic quantum computers, CMOS annealers, and optical parametric oscillators, present new opportunities for hybrid-optimization algorithms that are hardware accelerated by these devices.

Benchmarking

Probabilistic $N$-$k$ Failure-Identification for Power Systems

2 code implementations18 Apr 2017 Kaarthik Sundar, Carleton Coffrin, Harsha Nagarajan, Russell Bent

A general cutting-plane algorithm is proposed to solve the convex relaxation and linear approximations of the $N$-$k$ problem.

Systems and Control

The QC Relaxation: Theoretical and Computational Results on Optimal Power Flow

1 code implementation27 Feb 2015 Carleton Coffrin, Hassan L. Hijazi, Pascal Van Hentenryck

Convex relaxations of the power flow equations and, in particular, the Semi-Definite Programming (SDP) and Second-Order Cone (SOC) relaxations, have attracted significant interest in recent years.

Computational Engineering, Finance, and Science Optimization and Control

NESTA, The NICTA Energy System Test Case Archive

no code implementations3 Nov 2014 Carleton Coffrin, Dan Gordon, Paul Scott

In recent years the power systems research community has seen an explosion of work applying operations research techniques to challenging power network optimization problems.

A Linear-Programming Approximation of AC Power Flows

no code implementations16 Jun 2012 Carleton Coffrin, Pascal Van Hentenryck

Linear active-power-only DC power flow approximations are pervasive in the planning and control of power systems.

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