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Understanding Line Losses and Transformer Losses in Rural Isolated Distribution Systems
Rural, isolated power systems in the mainland U.S. and in states like Alaska and Hawaii are powered by assets like diesel generators. These rural, isolated power systems also cannot operate at the higher band of medium voltage (like 69kV). They are primarily in the 12 to 14 kV ran...
Prabakar, K. NLR
May 01, 2024
A Mixed Integer Linear Programming Approach for Optimal DER Portfolio, Sizing, and Placement in Multi-Energy Microgrids
Optimal microgrid design is a challenging problem, especially for multi-energy microgrids with electricity, heating, and cooling loads as well as sources, and multiple energy carriers. To address this problem, this paper presents an optimization model formulated as a mixed-integer...
Mashayekh, S. et al Lawrence Berkeley National Laboratory
Jan 31, 2017
Load Control for Frequency Response A Literature Review
As electricity grids employ greater fractions of renewable energy, which introduce additional variability and uncertainty in the net-load, balancing electrical load and generation becomes more challenging. This paper reviews the literature documenting physical simulations and real...
Anderson, B. et al NLR
Jan 31, 2022
Impact of IEEE 1547 Standard on Smart Inverters and the Applications in Power Systems
This white paper presents smart inverter features along with the implementation challenges and potential solutions. The paper describes smart inverter functionality and discusses their modeling, capabilities, testing, and certification. Originally published by a "fast track" worki...
Bravo, R. et al California Institute of Technology
Jul 31, 2020
Security-Constrained Design of Isolated Multi-Energy Microgrids
Energy supply in rural and off-grid communities has traditionally relied on diesel-based microgrids, due to limited access. But global environmental concerns are pushing for the transformation of these systems into renewable-based microgrids. This transition to more complex system...
Mashayekh, S. et al Lawrence Berkeley National Laboratory
Mar 31, 2018
User Objectives and Design Approaches for Microgrids: Options for Delivering Reliability and Resilience, Clean Energy, Energy Savings, and Other Priorities
This briefing paper, produced by NARUC and NASEO's Microgrids State Working Group, explores why different customers pursue microgrids and how design choices affect outcomes. Microgrids can operate in grid-connected or islanded mode, using local generation, storage and controls to ...
National Association of Regulatory Utility Commissioners, N.
Dec 31, 2020
NREL Topic 1 Final Report: Cohesive Application of Standards-Based Connected Devices to Enable Clean Energy Technologies
This document is the final report of a two-year development, test, and demonstration project entitled “Cohesive Application of Standards-Based Connected Devices to Enable Clean Energy Technologies”. The project was part of NREL’s (NREL) Integrated Network Test-bed for Energ...
Hudgins, A. et al NLR
Jan 31, 2018
Use of Traveling Wave Signatures in Medium-Voltage Distribution Systems for Fault Detection and Location
Protection systems are a critical feature for the proper operation of a power grid. Protection systems should be able to quickly detect, identify, locate, and isolate the faults within a time frame that prevents damage to grid components and reduces customer outages. As more inver...
Prabakar, K. et al NLR
Jul 31, 2021
Microgrid Controller Survey Report: 2024 Update
In the past decade, the number of microgrids deployed by electric utilities, end-use customers, and third parties has been increasing significantly both in the US and worldwide. The increase is driven by various reasons, such as carbon emission reduction, energy efficiency improve...
Liu, G. and Starke, M. Oak Ridge National Laboratory
Mar 31, 2024
Evaluation of Multi-Inverter Anti-Islanding With Grid Support and Ride-Through and Investigation of Island Detection Alternatives
The report, Evaluation of Multi-Inverter Anti-Islanding With Grid Support and Ride-Through and Investigation of Island Detection Alternatives, documents results from a set of laboratory simulations and experiments. This report documents results from a set of laboratory simulations...
Ropp, M. et al Sandia National Laboratories
Dec 31, 2018
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