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Overview of Functional Technical Requirements for Intentional Islands
This document provides an overview of intentional islands, otherwise known as microgrids. The topics covered include common types of microgrid configurations, high level summaries of standards that address some aspect of microgrid implementation and interconnection, and a discussi...
Narang, D. et al NLR
Nov 30, 2022
Performance Evaluation and Costs of a Combined Ground Source Heat Pump and Solar Photovoltaic Storage System in an Extreme Cold Climate
This report outlines the effectiveness and economics of a ground source heat pump system installed together with solar photovoltaic panels and a battery storage system in a local community building situated in a cold climate. The community building is a tribal building located in ...
Truffer-Moudra, D. et al NLR
May 31, 2023
Regulating Voltage: Recommendations for Smart Inverters
This report from GridLab provides recommendations for regulators and utilities on leveraging the advanced capabilities of smart inverters to manage voltage on distribution networks with high penetrations of solar and other DERs. It explains how functions such as volt VAR, frequenc...
O’Connell, R. et al GridLab
Sep 11, 2019
Phase I Microgrid Cost Study: Data Collection and Analysis of Microgrid Costs in the United States
The U.S. Department of Energy (DOE) Office of Electricity Microgrid Cost Study project is looking at identifying the costs of components, integration and installation of U.S. microgrids and project cost improvements and technical accelerators over the next 5 years and beyond. This...
Giraldez Miner, J. et al NLR
Oct 31, 2018
Comparison of Load Models for Estimating Electrical Efficiency in DC Microgrids: Preprint
This paper compares several electrical load models for estimating the efficiency of DC vs. AC distribution in microgrids. Candidate models include energy balance, harmonic power flow, and time-domain modeling. Model results are compared with numerical studies and validated with ex...
Santos, A. et al Colorado State University
Aug 31, 2020
Integrated Synchronization Control of Grid-Forming Inverters for Smooth Microgrid Transition
This paper develops an integrated synchronization control technique for a grid-forming inverter operating within a microgrid that can improve the microgrid's transients during microgrid transition operation. This integrated synchronization control includes the disconnection synchr...
Wang, J. et al NLR
Jul 31, 2019
Evaluating the Role of Pre-Application Reports in Improving Distributed Generation Interconnection Processes
NREL report, Evaluating the Role of Pre-Application Reports in Improving Distributed Generation Interconnection Process, evaluates the impact of the pre-application report process and how it relates to the application approval rate. This summary document is based on NREL report ...
Peterson, Z. and Lockhart, E. NLR
Oct 31, 2018
Clause-by-Clause Summary of Requirements in IEEE Std 1547-2018
This summary document distills the key requirements of the IEEE Std 1547-2018, the standard that defines the interconnection and interoperability criteria for distributed energy resources with electric power systems. Organized by clause, it outlines technical specifications relate...
Narang, D. et al NLR
Feb 29, 2020
A Primer on the Unintentional Islanding Protection Requirement in IEEE Std 1547-2018
This primer provides an accessible explanation of the unintentional islanding protection provisions in IEEE Std 1547-2018. It describes why preventing unintentional islanding is critical, outlines testing and detection methods, and clarifies performance requirements for distribute...
Narang, D. et al NLR
Mar 31, 2022
Sourcing Distributed Energy Resources for Distribution Grid Services
This DOE report explores how utilities and grid operators can procure and coordinate distributed energy resources (DERs) such as solar, storage, and demand response to provide distribution grid services. It analyzes market structures, procurement mechanisms, and regulatory framewo...
Electricity, O. U.S. Department of Energy
Nov 30, 2024
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