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ESIG—a forum for practitioners that provides resources for information on the status of wind and solar technology deployment—curates a list of grid integration studies and summary reports. Many reference documents for the studies cited in the Grid Integration Study Examples below (among others) can be found in this library.
Located in Integration Topics / Grid Integration Studies / Grid Integration Studies folder
Developed in response to the ambitious RE targets established by the Hawaii Clean Energy Initiative, the Hawaii Solar Integration Study evaluates the operational impacts of high penetrations of solar PV (including both centralized and distributed PV) on the electricity grids of two Hawaiian islands: Maui and Oahu. The two islands provide examples of small power grids with differing levels of firm and RE capacity. The study examines variability, the ability to curtail power output, grid support, and load characteristics in the context of increasing variable RE on these systems. The technical reports underlying the summary are available here.
Located in Integration Topics / Grid Integration Studies / Grid Integration Studies folder
This report examines the future of electricity resource planning in the context of a changing electricity industry. The report examines emerging issues and evolving practices in five key areas that will shape the future of resource planning: (1) central-scale generation, (2) distributed generation, (3) demand-side resources, (4) transmission, and (5) uncertainty and risk management. The analysis draws on a review of recent resource plans for 10 utilities that reflect some of the U.S. electricity industry’s extensive diversity.
Located in Integration Topics / Planning for Grid Integration / Planning for Grid Integration folder
Capacity expansion modeling is a fundamental tool for planning the future power system. Capacity expansion models can provide insights on possible pathways for the power system under different assumptions about technology innovation, transmission expansion, demand changes, and policies. This report summarizes the experience of capacity expansion modeling at the National Renewable Energy Laboratory (NREL). The authors address in detail NREL’s approach to key questions that arise when modeling future capacity expansion, with a particular emphasis on modeling significant levels of variable RE deployment.
Located in Integration Topics / Planning for Grid Integration / Planning for Grid Integration folder
This report, written as a summary for power system regulators and operators of Mexico, examines key practices of different U.S. jurisdictions for evaluating and approving generation and transmission expansion projects. The report includes a discussion about cost-benefit analysis to inform decision–making and a discussion about reliability standards and how to model reliability in the bulk electric power system in the context of increased adoption of variable renewable resources. Section 3.3 reviews approaches to modeling dispatch, capacity expansion, and power flow, with an emphasis on accurate representation of variable renewable resources, and Table 3 provides samples of power system models in use in North America.
Located in Integration Topics / Planning for Grid Integration / Planning for Grid Integration folder
India has a target of 40 GW of rooftop PV by 2022. The study intends to provide an overview of the characteristics of the Indian power system and its challenges with regard to a significant increase in rooftop PV, as well as a template for distribution companies on how to manage rising PV shares, which studies to conduct and which technology options to select.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
Integrating DPV on a distribution system poses both unique challenges and opportunities. This factsheet reviews the barriers and provides best practices when operating and planning for distributed solar.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
When not properly addressed, high penetrations of DPV on a distribution system present issues like voltage overload, reverse power flow, and protection failure, which threaten system reliability. Drawing upon results from a five-year study of the Southern California Edison (SCE) distribution system, this handbook presents a detailed analysis of the potential impacts and mitigation techniques when integrating DPV. Written for distribution engineers, the handbook also provides a study guide for modeling and assessing PV impacts, covering topics such as model development, data validation and measurement, study criteria, and the steps involved in power flow and fault analysis. While the impacts and mitigation techniques described in this handbook are written for utility-scale PV systems (1-5 MW), much of the information is also relevant for the proliferation of smaller, DPV systems.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
In anticipation of significant growth in DPV in India, this report reviews policies and regulations for DG; identifies technical challenges to significantly increasing grid-connected DPV; and makes recommendations for addressing power quality, safety, grid stability, and distribution system operation issues. The report provides an example of a country-specific review and synthesis of best practices to inform national and state-level technical and grid code specifications, advanced inverter functionalities, meter technology deployment, certification, and testing processes.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
DPV can be designed to supply electricity during grid outages. This paper presents approaches that specifically support resiliency through design of PV systems utilizing community energy storage, solar-diesel hybrid systems, and micro-grids. The paper also considers policies and regulations to support resiliency.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
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