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As part of the U.S. SunShot Initiative—aiming to make PV electricity cost-competitive with conventional generation by 2020—this report analyzes the impact of high-penetration variable generation on the distribution grid, it demonstrates that in most cases DG can be safely integrated at much higher levels than interconnection standards allow. By streamlining interconnection processes, deploying advanced inverter functionalities, and coordinating DGPV, upwards of 350 GW can be hosted on the U.S. grid with little additional hardware. The report also outlines challenges to interconnection such as voltage regulation, power flow, and protection issues. It then studies the role of storage and complementary technologies to overcome reliability constraints. This research is applicable outside of the U.S. in demonstrating how to maximize an existing grid for DG.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
High penetration of DPV often leads to the infamous “duck curve,” the formation of two daily peaks in the morning and evening when PV is not available. This easy to read report assesses a variety of options to mitigate the “duck curve” from targeted efficiency, time of use rate design, storage, demand response, balancing, and complementing DPV with peak-oriented renewables. Implantation of these recommendations flattens the demand curve, allowing for additional DPV.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
This report, written to inform energy planning in China, showcases regulatory support, policies, and financing innovations that have enabled DPV deployment and market growth in the U.S.
Located in Topics & Resources / Regulation & Public Policy / Regulation & Public Policy folder
Video Integrating Variable Renewable Energy into the Grid: Key Issues and Emerging Solutions
This webinar reviews the challenges to integrating significant quantities of variable renewable energy to the grid as well as the emerging solutions that policymakers, regulators and grid operators have taken to integrate wind and solar and meet renewable energy targets. Webinar participants learn about the myths, misperceptions, costs and options for scaling up grid-connected renewable energy, as well as the Greening the Grid website and technical assistance opportunities.
Located in Trainings / Webinars
New Resource - Solar and Wind Participation in Automatic Generation Control Systems
The National Renewable Energy Laboratory (NREL) has released a report titled, "Solar and Wind Participation in Automatic Generation Control Systems." This report focuses on emerging technological and regulatory considerations for using solar and wind generators to provide essential reliability services through participation in area-wide automatic generation control (AGC) systems.
Located in News and Events
This report provides a concise global overview of grid integration challenges and emerging solutions, covering topics such as supply-side flexibility innovations, flexibility from distributed generation, curtailment, transmission and distribution system planning, and electricity market design. The report draws on experience from several jurisdictions where renewables provide 20%–40% of electricity generation, with particular emphasis on experiences in Germany, Denmark, and California. The report also references actions by developing countries (China, India, and South Africa).
Located in Integration Topics / Cross-Cutting / Cross-cutting links folder
This filmed presentation summarizes a 2014 report from Ecofys. The first half of the video discusses the grid operation challenges that arise with high penetrations of variable RE. The second half of the video describes the various technical, regulatory, and market options for improving flexibility of the grid over the short-, medium-, and long-term. The Ecofys report includes factsheets on the following topics: Active Power Control (pg. 19), Demand Management in Industrial Installations and in Services and Households (pgs. 21-22), Electric Vehicles (pg. 23), Compressed Air Storage (pg. 27), Fly Wheels (pg. 28), and Batteries (pg. 29).
Located in Integration Topics / Ancillary Services / Ancillary Services folder
FERC Order 784 is a final rule from the United States Department of Energy’s Federal Energy Regulatory Commission (FERC) that outlines revisions to its regulations to foster competition and transparency in ancillary services markets. The revision affects market-based rate regulations, ancillary services requirements under the pro forma open-access transmission tariff (OATT), and accounting and reporting requirements. The changes proposed also modify the accounting regulations to increase transparency for energy storage facilities.
Located in Integration Topics / Ancillary Services / Ancillary Services folder
This paper summarizes existing research on the relationship between energy efficiency and demand response. Energy efficiency measures and rate design can impact investments towards demand response measures (and vice versa). Using information gathered through interviews with program administrators, customers, and service providers, this paper suggests four ways to coordinate energy efficiency and demand response programs (combining program offerings, coordinating program marketing and education, enabling market-driven coordinated services, and developing building codes and appliance standards) and also discusses barriers and opportunities to facilitate coordination.
Located in Integration Topics / Demand Response and Storage / Demand Response and Storage Folder
These slides describe the Flexibility Assessment Tool (FAST), which can be used to assess the flexibility of a power system. This assessment can help operators address the added variability and uncertainty associated with large-scale variable RE penetration on the grid. The tool specifically enables the examination of flexible generation, interconnection, storage, and demand-side management. Although these slides are intended to describe the FAST tool, they can also be used as a general guide for key steps to assess system flexibility.
Located in Integration Topics / Flexible Generation / Flexible Generation folder
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