74 citations · 246 across the 43 of their papers we have counts for
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Optimization-Based Bound Tightening using a Strengthened QC-Relaxation of the Optimal Power Flow Problem
Kaarthik Sundar, Harsha Nagarajan, Sidhant Misra +3
This article develops a strengthened convex quadratic convex (QC) relaxation of the AC Optimal Power Flow (AC-OPF) problem and presents an optimization-based bound-tightening (OBBT…
Convex Hull Formulations for Mixed-Integer Multilinear Functions
Harsha Nagarajan, Kaarthik Sundar, Hassan Hijazi +1
In this paper, we present convex hull formulations for a mixed-integer, multilinear term/function (MIMF) that features products of multiple continuous and binary variables. We deve…
Algorithms for Optimal Topology Design, Placement, Sizing and Operation of Distributed Energy Resources in Resilient Off-grid Microgrids
Sreenath Chalil Madathil, Harsha Nagarajan, Russell Bent +3
Power distribution in remote communities often depends on off-grid microgrids. In order to address the reliability challenges for these microgrids, we develop a mathematical model…
On Maximizing Weighted Algebraic Connectivity for Synthesizing Robust Networks
Harsha Nagarajan
This article deals with the following simpler version of an open problem in system realization theory which has several important engineering applications: Given a collection of ma…
Juniper: An Open-Source Nonlinear Branch-and-Bound Solver in Julia
Ole Kröger, Carleton Coffrin, Hassan Hijazi +1
Nonconvex mixed-integer nonlinear programs (MINLPs) represent a challenging class of optimization problems that often arise in engineering and scientific applications. Because of n…
Hierarchical Predictive Control Algorithms for Optimal Design and Operation of Microgrids
Sai Krishna Kanth Hari, Kaarthik Sundar, Harsha Nagarajan +2
In recent years, microgrids, i.e., disconnected distribution systems, have received increasing interest from power system utilities to support the economic and resiliency posture o…
Tight Piecewise Convex Relaxations for Global Optimization of Optimal Power Flow
Mowen Lu, Harsha Nagarajan, Russell Bent +2
Since the alternating current optimal power flow (ACOPF) problem was introduced in 1962, developing efficient solution algorithms for the problem has been an active field of resear…
Communication-Constrained Expansion Planning for Resilient Distribution Systems
Geunyeong Byeon, Pascal Van Hentenryck, Russell Bent +1
Distributed generation and remotely controlled switches have emerged as important technologies to improve the resiliency of distribution grids against extreme weather-related distu…