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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 presents a brief introduction to the IRP process as it has been implemented in the United States and describes the purpose and use of the IRP process. The report presents several case studies of IRPs and summarizes how they differ in terms of planning horizon, frequency of updates, representation of existing resources and planned retirements, and relationship with long-term procurement processes. The case studies include examples of best-practices for including renewable energy and energy efficiency considerations in the IRP process.
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
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
Technological innovations are supporting increased DPV penetration levels. One important innovation involves the use of advanced inverter functionality to address PV grid integration challenges. In many cases these functionalities only require software and protocol updates to inverters currently in use. The report describes the use of advanced inverters to support voltage and frequency level control as DG comes on and off-line. Policy and regulatory considerations to support advanced inverter deployment are also presented in the paper.
Located in Topics & Resources / Grid Planning, Integration, & Operations / Grid Planning, Integration, & Operations folder
Traditional interconnection processes evaluate the impacts a distributed generator has on system safety, reliability, and power quality. This concept paper introduces “Integrated Distribution Planning,” an emerging alternative methodology designed to enable DPV. In the report, utilities and distribution system operators proactively study the hosting capacity of distribution circuits, the ability of these circuits to accommodate growth in DG, and any necessary infrastructure upgrades; all in advance of receiving interconnection requests from generators.
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
Incentive programs credit DPV generators for their production and, in several U.S. states, have been successful at creating demand for DPV to meet targets. This report examines various incentive structures and recommends best practices. Some incentive structures are found to be contextually more applicable than others, and tools to align incentives with changing market conditions are discussed. Because ratepayers are usually funding incentives, methods to protect ratepayers and ensure cost-effectiveness are also discussed. Utilities looking for ways to incentivize DPV to meet targets or obligations can find value in this report.
Located in Topics & Resources / Regulation & Public Policy / Regulation & Public Policy folder
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