Blake Lundstrom
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View article: Scalable Hybrid Classification-Regression Solution for High-Frequency Nonintrusive Load Monitoring
Scalable Hybrid Classification-Regression Solution for High-Frequency Nonintrusive Load Monitoring Open
Residential buildings with the ability to monitor and control their net-load (sum of load and generation) can provide valuable flexibility to power grid operators. We present a novel multiclass nonintrusive load monitoring (NILM) approach …
View article: Scalable Hybrid Classification-Regression Solution for High-Frequency Nonintrusive Load Monitoring
Scalable Hybrid Classification-Regression Solution for High-Frequency Nonintrusive Load Monitoring Open
Residential buildings with the ability to monitor and control their net-load (sum of load and generation) can provide valuable flexibility to power grid operators. We present a novel multiclass nonintrusive load monitoring (NILM) approach …
View article: Evaluation of Optimal Net Load Management in Microgrids Using Hardware-in-the-Loop Simulation: Preprint
Evaluation of Optimal Net Load Management in Microgrids Using Hardware-in-the-Loop Simulation: Preprint Open
This paper presents the performance evaluation of a net load management (NLM) engine that balances load and generation in an isolated community to power a critical facility after a grid interruption event (e.g., lost a large generation uni…
View article: New Industry Partnerships: Solar Energy Technologies Office Support for Early Projects in the Energy Systems Integration Facility: An Agreement Closeout Summary Report
New Industry Partnerships: Solar Energy Technologies Office Support for Early Projects in the Energy Systems Integration Facility: An Agreement Closeout Summary Report Open
The U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) Solar Energy Technologies Office (SETO)-funded New Industry Partnerships (NIPs) agreement established multiple new cooperative research projects wi…
View article: What is Energy Systems Integration?
What is Energy Systems Integration? Open
To achieve the most efficient, flexible, and reliable energy system, NREL’s Energy Systems Integration researchers work with manufacturers, utilities, and other research organizations to find solutions to big energy challenges. This video …
View article: Isochronous Architecture-Based Voltage-Active Power Droop for Multi-Inverter Systems
Isochronous Architecture-Based Voltage-Active Power Droop for Multi-Inverter Systems Open
Advanced microgrids consisting of distributed energy resources interfaced with multi-inverter systems are becoming more common. Consequently, the effectiveness of voltage and frequency regulation in microgrids using conventional droop-base…
View article: Optimal Power Hardware-in-the-Loop Interfacing: Applying Modern Control for Design and Verification of High-Accuracy Interfaces
Optimal Power Hardware-in-the-Loop Interfacing: Applying Modern Control for Design and Verification of High-Accuracy Interfaces Open
Here, we develop a novel approach to designing power hardware-in-the-loop (PHIL) simulation interfaces that maximizes simulation bandwidth and accuracy by leveraging a modern control framework that explicitly considers objectives on accura…
View article: Distribution Feeder-Scale Fast Frequency Response via Optimal Coordination of Net-Load Resources—Part II: Large-Scale Demonstration
Distribution Feeder-Scale Fast Frequency Response via Optimal Coordination of Net-Load Resources—Part II: Large-Scale Demonstration Open
This work is the second of a two-part series in which we develop and experimentally demonstrate a hierarchical control solution for optimally coordinating thousands of deferrable loads and distributed energy resources (DERs) to provide fas…
View article: Distribution Feeder-Scale Fast Frequency Response via Optimal Coordination of Net-Load Resources—Part I: Solution Design
Distribution Feeder-Scale Fast Frequency Response via Optimal Coordination of Net-Load Resources—Part I: Solution Design Open
This work is the first of a two-part series that develops and experimentally demonstrates a first-of-its-kind hierarchical control solution for optimally dispatching thousands of deferrable loads and distributed energy resources (DERs) acr…
View article: Design of a Non-PLL Grid-Forming Inverter for Smooth Microgrid Transition Operation: Preprint
Design of a Non-PLL Grid-Forming Inverter for Smooth Microgrid Transition Operation: Preprint Open
This paper develops a non-phase-locked loop (PLL) grid-connected inverter that can improve the microgrid’s transients during transition operation. By emulating the operation of a synchronous machine, the inverter generates its own voltage …
View article: Design of a Non-PLL Grid-forming Inverter for Smooth Microgrid Transition Operation
Design of a Non-PLL Grid-forming Inverter for Smooth Microgrid Transition Operation Open
This paper develops a controller for a grid-forming (GFM) inverter that is capable of operating as either a GFM or grid-feeding source that can improve the operation of a microgrid during on-off grid transitions through use of a novel sync…
View article: Distributed Power Apportioning with Early Dispatch for Ancillary Services in Renewable Grids
Distributed Power Apportioning with Early Dispatch for Ancillary Services in Renewable Grids Open
This article develops a distributed framework for coordinating distributed energy resources (DERs) in a power network to provide secondary frequency response (SFR) as an ancillary service to the bulk power system. A distributed finite-time…
View article: Isochronous Architecture-Based Voltage-Active Power Droop for\n Multi-Inverter Systems
Isochronous Architecture-Based Voltage-Active Power Droop for\n Multi-Inverter Systems Open
Advanced microgrids consisting of distributed energy resources interfaced\nwith multi-inverter systems are becoming more common. Consequently, the\neffectiveness of voltage and frequency regulation in microgrids using\nconventional droop-b…
View article: High-Frequency, Multiclass Nonintrusive Load Monitoring for Grid-Interactive Residential Buildings
High-Frequency, Multiclass Nonintrusive Load Monitoring for Grid-Interactive Residential Buildings Open
Smart buildings with net-load metering and control capabilities can provide valuable flexibility to grid operators. This article develops a novel approach for high-frequency, multiclass nonintrusive load monitoring (NILM) that enables effe…
View article: Coordinated Control Of The Modern Grid: High-Bandwidth Optimal Coordination, Inference, And Verification
Coordinated Control Of The Modern Grid: High-Bandwidth Optimal Coordination, Inference, And Verification Open
University of Minnesota Ph.D. dissertation. March 2020. Major: Electrical/Computer Engineering. Advisor: Murti Salapaka. 1 computer file (PDF); x, 126 pages.
View article: Systematic Characterization of Power Hardware-in-the-Loop Evaluation Platform Stability
Systematic Characterization of Power Hardware-in-the-Loop Evaluation Platform Stability Open
This poster provides an overview of systematic characterization of power-hardware-in-the-loop evaluation platform stability.
View article: Systematic Characterization of Power Hardware-in-the-Loop Evaluation Platform Stability
Systematic Characterization of Power Hardware-in-the-Loop Evaluation Platform Stability Open
This paper presents a systematic approach to characterize the stability of a power-hardware-in-the-loop (PHIL) platform, an important step in PHIL tests. Many existing works focus the stability assessments on the PHIL interface algorithm; …
View article: Multi-PCC Electric Distribution System Power Hardware-in-the-Loop
Multi-PCC Electric Distribution System Power Hardware-in-the-Loop Open
Summary of recent NREL work on grid integration research using multi-point of common coupling electric distribution system power hardware-in-the-loop simulation.
View article: Fast Primary Frequency Response Using Coordinated DER and Flexible Loads: Framework and Residential-Scale Demonstration: Preprint
Fast Primary Frequency Response Using Coordinated DER and Flexible Loads: Framework and Residential-Scale Demonstration: Preprint Open
Methods for supporting grid frequency stabilization using widespread flexible load and DER are becoming essential as the portion of synchronous generation decreases. This article develops a framework for providing fast primary frequency re…
View article: Designing a Smaller Power Inverter: The Google Little Box Challenge
Designing a Smaller Power Inverter: The Google Little Box Challenge Open
Google's Little Box Challenge offered $1 million to the team that built the best kilowatt-scale solar inverter with a power density greater than 50 watts per cubic inch. To help determine the winner, NREL validated the entries at the Energ…
View article: A Fuzzy-Logic Subsumption Controller for Home Energy Management Systems
A Fuzzy-Logic Subsumption Controller for Home Energy Management Systems Open
Presentation for NAPS 2015 associated with conference publication CP-64392. Home Energy Management Systems (HEMS) are controllers that manage and coordinate the generation, storage, and loads in a home. These controllers are increasingly n…
View article: Trans‐oceanic remote power hardware‐in‐the‐loop: multi‐site hardware, integrated controller, and electric network co‐simulation
Trans‐oceanic remote power hardware‐in‐the‐loop: multi‐site hardware, integrated controller, and electric network co‐simulation Open
Electric system operators are increasingly concerned with the potential system‐wide impacts of the large‐scale integration of distributed energy resources including voltage control, protection coordination, and equipment wear. This prompts…
View article: Plug and Play Solar Power: Simplifying the Integration of Solar Energy in Hybrid Applications; Cooperative Research and Development Final Report, CRADA Number CRD-13-523
Plug and Play Solar Power: Simplifying the Integration of Solar Energy in Hybrid Applications; Cooperative Research and Development Final Report, CRADA Number CRD-13-523 Open
The Commonwealth Scientific and Industrial Research Organisation (CSIRO) is Australia's national science agency. CSIRO received funding from the Australian Solar Institute (ASI) for the United States-Australia Solar Energy Collaboration (U…
View article: Learning Exact Topology of a Loopy Power Grid from Ambient Dynamics
Learning Exact Topology of a Loopy Power Grid from Ambient Dynamics Open
Estimation of the operational topology of the power grid is necessary for optimal market settlement and reliable dynamic operation of the grid. This paper presents a novel framework for topology estimation for general power grids (loopy or…
View article: The Google High Power Density Inverter Prize: Innovation in PV Inverter Power Density: Cooperative Research and Development Final Report, CRADA Number: CRD-14-568
The Google High Power Density Inverter Prize: Innovation in PV Inverter Power Density: Cooperative Research and Development Final Report, CRADA Number: CRD-14-568 Open
Google is encouraging development of advanced photovoltaic inverters with high power density by holding a public competition and offering a prize for the best performing high power developed. NREL will perform the performance and validatio…
View article: Life prediction model for grid-connected Li-ion battery energy storage system
Life prediction model for grid-connected Li-ion battery energy storage system Open
Lithium-ion (Li-ion) batteries are being deployed on the electrical grid for a variety of purposes, such as to smooth fluctuations in solar renewable power generation. The lifetime of these batteries will vary depending on their thermal en…
View article: Power Hardware-in-the-Loop Testing at the ESIF
Power Hardware-in-the-Loop Testing at the ESIF Open
Learn about the power hardware-in-the-loop testing capability at the Energy Systems integration Facility.
View article: Hawaiian Electric Advanced Inverter Grid Support Function Laboratory Validation and Analysis
Hawaiian Electric Advanced Inverter Grid Support Function Laboratory Validation and Analysis Open
The objective for this test plan was to better understand how to utilize the performance capabilities of advanced inverter functions to allow the interconnection of distributed energy resource (DER) systems to support the new Customer Self…
View article: Residential PV-Energy Storage Testing Collaboration with SunPower: Cooperative Research and Development Final Report, CRADA Number CRD-14-569
Residential PV-Energy Storage Testing Collaboration with SunPower: Cooperative Research and Development Final Report, CRADA Number CRD-14-569 Open
Residential scale energy storage devices have shown great promise to add value and improve the ability to integrate distributed and variable generation into the distribution grid. Battery energy storage systems combined with PV and advance…
View article: NREL Controllable Grid Interface for Testing of Renewable Energy Technologies
NREL Controllable Grid Interface for Testing of Renewable Energy Technologies Open
This presentation provides a high-level overview of NREL's multi-megawatt testing facilities and capabilities for the grid integration of renewable technologies.