3 citations · 6 across the 14 of their papers we have counts for
17 papers
Cross-Atlantic Research Agenda for Scalable Grid Architectures and Distributed Flexibility
Mads R. Almassalkhi, Dakota Hamilton, Hasan Giray Oral +10
Electric power systems are rapidly evolving into deeply digital, cyber-physical infrastructures in which large fleets of distributed energy resources must be coordinated as system-…
Improving frequency response with synthetic damping available from fleets of distributed energy resources
Hani Mavalizadeh, Luis A. Duffaut Espinosa, Mads R. Almassalkhi
With the increasing use of renewable generation in power systems, responsive resources will be necessary to support primary frequency control in future low-inertia/under-damped pow…
Market mechanism to enable grid-aware dispatch of Aggregators in radial distribution networks
Nawaf Nazir, Mads Almassalkhi
This paper presents a market-based optimization framework wherein Aggregators can compete for nodal capacity across a distribution feeder and guarantee that allocated flexible capa…
Exploring reactive power limits on wind farm collector networks with convex inner approximations
Nawaf Nazir, Mads Almassalkhi, Ian Hiskens
A wind farm can provide reactive power at sub-transmission and transmission buses in order to support and improve voltage profiles. It is common for the reactive power capability o…
Optimal Frequency Regulation using Packetized Energy Management
Sarnaduti Brahma, Adil Khurram, Hamid Ossareh +1
Packetized energy management (PEM) is a demand dispatch scheme that can be used to provide ancillary services such as frequency regulation. In PEM, distributed energy resources (DE…
Real-time Grid and DER Co-simulation Platform for Validating Large-scale DER Control Schemes
Adil Khurram, Mahraz Amini, Luis A. Duffaut Espinosa +2
Distributed energy resources (DERs) such as responsive loads and energy storage systems are valuable resources available to grid operators for balancing supply-demand mismatches vi…
Guaranteeing a physically realizable battery dispatch without charge-discharge complementarity constraints
Nawaf Nazir, Mads Almassalkhi
The non-convex complementarity constraints present a fundamental computational challenge in energy constrained optimization problems. In this work, we present a new, linear, and ro…
A Methodology for Quantifying Flexibility in a fleet of Diverse DERs
Adil Khurram, Luis A. Duffaut Espinosa, Mads Almassalkhi
This paper addresses the question: how many distributed energy resources (DERs) are needed to provide MW of flexibility over a number of hours? For this purpose, a metric bas…
Optimal and resilient coordination of virtual batteries in distribution feeders
Sarnaduti Brahma, Nawaf Nazir, Hamid Ossareh +1
This paper presents a novel hierarchical framework for real-time, network-admissible coordination of responsive grid resources aggregated into virtual batteries (VBs). In this cont…
Distributed Control of Charging for Electric Vehicle Fleets under Dynamic Transformer Ratings
Micah Botkin-Levy, Alexander Engelmann, Tillmann Mühlpfordt +2
Due to their large power draws and increasing adoption rates, electric vehicles (EVs) will become a significant challenge for electric distribution grids. However, with proper char…
Stochastic multi-period optimal dispatch of energy storage in unbalanced distribution feeders
Nawaf Nazir, Mads Almassalkhi
This paper presents a convex, multi-period, AC-feasible Optimal Power Flow (OPF) framework that robustly dispatches flexible demand-side resources in unbalanced distribution feeder…
Voltage positioning using co-optimization of controllable grid assets in radial networks
Nawaf Nazir, Mads Almassalkhi
With increasing penetration of solar PV, some distribution feeders are experiencing highly variable net-load flows and even reverse flows. To optimize distribution systems under su…
Grid-aware aggregation and realtime disaggregation of distributed energy resources in radial networks
Nawaf Nazir, Mads Almassalkhi
Dispatching a large fleet of distributed energy resources (DERs) in response to wholesale energy market or regional grid signals requires solving a challenging disaggregation probl…
Optimal multi-period dispatch of distributed energy resources in unbalanced distribution feeders
Nawaf Nazir, Pavan Racherla, Mads Almassalkhi
This paper develops an efficient algorithm for the multi-period optimal dispatch of deterministic inverter-interfaced energy storage in an unbalanced distribution feeder with signi…
Convex inner approximation of the feeder hosting capacity limits on dispatchable demand
Nawaf Nazir, Mads Almassalkhi
This paper presents a method to obtain a convex inner approximation that aims to improve the feasibility of optimal power flow (OPF) models in distribution feeders. For a resistive…
A Model-Predictive Control Method for Coordinating Virtual Power Plants and Packetized Resources, with Hardware-in-the-Loop Validation
Mahraz Amini, Adil Khurram, Andrew Klem +2
In this paper, we employ a bi-level control system to react to disturbances and balance power mismatch by coordinating distributed energy resources (DERs) under packetized energy m…
Optimal corrective dispatch of uncertain virtual energy storage systems
Mahraz Amini, Mads Almassalkhi
High penetrations of intermittent renewable energy resources in the power system require large balancing reserves for reliable operations. Aggregated and coordinated behind-the-met…