Wind Power Capacity Value Metrics And Variability
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Wind Power Capacity Value Metrics And Variability
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Author : Frederick W. Letson
language : en
Publisher:
Release Date : 2015
Wind Power Capacity Value Metrics And Variability written by Frederick W. Letson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Capacity value is the contribution of a power plant to the ability of the power system to meet high demand. As wind power penetration in New England, and worldwide, increases so does the importance of identifying the capacity contribution made by wind power plants. It is critical to accurately characterize the capacity value of these wind power plants and the variability of the capacity value over the long term. This is important in order to avoid the cost of keeping extra power plants operational while still being able to cover the demand for power reliably. This capacity value calculation is particularly interesting because wind power output and demand for electricity are not statistically independent. They are both driven by the weather. This dissertation describes a model of the New England power system in the presence of increasing wind power penetration, used to achieve three major ends: 1. To evaluate the magnitude of the contribution that wind power would make to resource adequacy in the New England Power system at various levels of penetration (up to 50%). 2. To characterize the inter-annual variability in that contribution. 3. To assess various capacity value metrics with regard to their ability to predict the long term capacity value of wind power plants, especially based on limited data. 4. To characterize the interaction of wind power plants and energy storage with respect to capacity value. These ends were achieved by completing three studies: a long-term study based on measured wind data, a high-penetration study based on synthesized data, and an investigation of the effect of grid-scale energy storage. While the methods used in these studies are generally applicable, New England is used as a consistent example since many of these phenomena are strongly affected by the regional wind and power system characteristics. The results of this work show that wind power capacity value is relatively high at low penetration and decreases substantially as penetration increases to 50% and that this is not significantly improved by the inclusion of grid-scale (daily load-shifting) energy storage. Also, the capacity value of this energy storage, considered separately is relatively high, and not strongly dependent on wind energy penetration level. In future power systems with higher wind penetrations than 50% or those relying on longer-term storage (which could be necessary to reach very high levels of renewable penetration), new metrics of capacity value may be necessary to ensure system adequacy
Parameterizing The Variability And Uncertainty Of Wind And Solar In Cems
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Author :
language : en
Publisher:
Release Date : 2016
Parameterizing The Variability And Uncertainty Of Wind And Solar In Cems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
We present current and improved methods for estimating the capacity value and curtailment impacts from variable generation (VG) in capacity expansion models (CEMs). The ideal calculation of these variability metrics is through an explicit co-optimized investment-dispatch model using multiple years of VG and load data. Because of data and computational limitations, existing CEMs typically approximate these metrics using a subset of all hours from a single year and/or using statistical methods, which often do not capture the tail-event impacts or the broader set of interactions between VG, storage, and conventional generators. In our proposed new methods, we use hourly generation and load values across all hours of the year to characterize the (1) contribution of VG to system capacity during high load hours, (2) the curtailment level of VG, and (3) the reduction in VG curtailment due to storage and shutdown of select thermal generators. Using CEM model outputs from a preceding model solve period, we apply these methods to exogenously calculate capacity value and curtailment metrics for the subsequent model solve period. Preliminary results suggest that these hourly methods offer improved capacity value and curtailment representations of VG in the CEM from existing approximation methods without additional computational burdens.
Electric Utility Value Determination For Wind Energy
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Author : David Percival
language : en
Publisher:
Release Date : 1981
Electric Utility Value Determination For Wind Energy written by David Percival and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Renewable energy sources categories.
Parameterizing The Variability And Uncertainty Of Wind And Solar In Cems
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Author :
language : en
Publisher:
Release Date : 2016
Parameterizing The Variability And Uncertainty Of Wind And Solar In Cems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
We present current and improved methods for estimating the capacity value and curtailment impacts from variable generation (VG) in capacity expansion models (CEMs). The ideal calculation of these variability metrics is through an explicit co-optimized investment-dispatch model using multiple years of VG and load data. Because of data and computational limitations, existing CEMs typically approximate these metrics using a subset of all hours from a single year and/or using statistical methods, which often do not capture the tail-event impacts or the broader set of interactions between VG, storage, and conventional generators. In our proposed new methods, we use hourly generation and load values across all hours of the year to characterize the (1) contribution of VG to system capacity during high load hours, (2) the curtailment level of VG, and (3) the reduction in VG curtailment due to storage and shutdown of select thermal generators. Using CEM model outputs from a preceding model solve period, we apply these methods to exogenously calculate capacity value and curtailment metrics for the subsequent model solve period. Preliminary results suggest that these hourly methods offer improved capacity value and curtailment representations of VG in the CEM from existing approximation methods without additional computational burdens.
Future Of Wind
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Author : International Renewable Energy Agency IRENA
language : en
Publisher: International Renewable Energy Agency (IRENA)
Release Date : 2019-10-01
Future Of Wind written by International Renewable Energy Agency IRENA and has been published by International Renewable Energy Agency (IRENA) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-01 with Technology & Engineering categories.
This study presents options to speed up the deployment of wind power, both onshore and offshore, until 2050. It builds on IRENA’s global roadmap to scale up renewables and meet climate goals.
Economic And Technical Impacts Of Wind Variability And Intermittency On Long Term Generation Expansion Planning In The U S
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Author : Caroline Elisabeth Hénia Brun
language : en
Publisher:
Release Date : 2011
Economic And Technical Impacts Of Wind Variability And Intermittency On Long Term Generation Expansion Planning In The U S written by Caroline Elisabeth Hénia Brun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Electricity power systems are a major source of carbon dioxide emissions and are thus required to change dramatically under climate policy. Large-scale deployment of wind power has emerged as one key driver of the shift from conventional fossil-fuels to renewable sources. However, technical and economic concerns are arising about the integration of variable and intermittent electricity generation technologies into the power grid. Designing optimal future power systems requires assessing real wind power capacity value as well as back-up costs. This thesis develops a static cost-minimizing generation capacity expansion model and applies it to a simplified representation of the U.S. I aggregate an hourly dataset of load and wind resource in eleven regions in order to capture the geographical diversity of the U.S. Sensitivity of the optimal generation mix over a long-term horizon with respect to different cost assumptions and policy scenarios is examined. I find that load and wind resource are negatively correlated in most U.S. regions. Under current fuel costs (average U.S. costs for year 2002 to year 2006) regional penetration of wind ranged from 0% (in the South East, Texas and South Central regions) to 22% (in the Pacific region). Under higher fuel costs as projected by the Energy Information Administration (average for the period of 2015 to 2035) penetration ranged from 0.3% (in the South East region) to 59.7% (in the North Central region). Addition of a C02 tax leads to an increase of optimal wind power penetration. Natural gas-fired units are operating with an actual capacity factor of 17% under current fuel costs and serve as back-up units to cope with load and wind resource variability. The back-up required to deal specifically with wind resource variations ranges from 0.25 to 0.51 MW of natural gas-fired installed per MW of wind power installed and represents a cost of $4/MWh on average in the U.S., under current fuel costs.
Complementarity Of Variable Renewable Energy Sources
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Author : Jakub Jurasz
language : en
Publisher: Academic Press
Release Date : 2022-05-23
Complementarity Of Variable Renewable Energy Sources written by Jakub Jurasz and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-23 with Technology & Engineering categories.
Complementarity of Variable Renewable Energy Sources consolidates current developments on the subject, addressing all technical advances, presenting new mapping results, and bringing new insights for the continuation of research and implementation on this fascinating topic. By answering questions such as How can complementarity be used in the operation of large interconnected systems?, What is the real applicability potential of energetic complementarity?, and How will it impact energy generation systems?, this title is useful for all researchers, academic and students investigating the topic of renewable energy complementarity in systems. In just over a decade, the subject of 'energy complementarity' has experienced a growing presence and understanding by researchers and managers of energy resources looking to enhance energy systems. Early research proposed methods to quantify complementarity, the effects of complementarity on performance of hybrid systems, and how to identify and map complementarity between solar energy, wind energy and hydroelectric energy systems. Includes chapter maps to visualize system performance under different complementarity indexes Addresses complementarity in the operation of large and small to medium-sized hybrid systems Provides methods for determining complementarity between various energy sources
Valuing Wind Generation On Integrated Power Systems
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Author : Ken Dragoon
language : en
Publisher: William Andrew
Release Date : 2010-09-28
Valuing Wind Generation On Integrated Power Systems written by Ken Dragoon and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-28 with Technology & Engineering categories.
Wind powered generation is the fastest growing energy source in the United States due to a combination of economic incentives, public preference for renewable energy as expressed in government policies, competitive costs, and the need to address global warming. The economic consequences of the relative variability and lower predictability of wind generation are not easily captured in standard economic analyses performed by utility planners. This book provides utility analysts and regulators a guide to analyzing the value of wind generation in the context of modern power systems.Guiding the reader through the steps to understanding and valuing wind generation on modern power systems, this book approaches the issue from the various, current perspectives in the US. These include utilities that are still primarily vertically integrated power providers and systems dominated by independent system operators (ISOs). Outlined here are the basic procedures in a wind valuation study, described with enough detail so that analysts spanning a range of resources and sophistication can reasonably undertake a competent study. Descriptions of studies performed by other utilities are also provided, explaining their specific approaches to the fundamentals. Finally, it includes a short section on power systems that utilize relatively large fractions of wind, and how operating procedures and valuing techniques may need alteration to accommodate them.• Reviews operating challenges that large amounts of wind power present to power systems operators • Outlines alternative approaches to quantifying the systems services necessary to accommodate the wind • Explains how economic analyses of wind generation are competently performed • Describes how to represent wind generation in computer models commonly used by electric utility planners that may not be specifically designed to incorporate wind generation • Reviews methods used by some select utility companies around the United States • Touches on key European issues involving relatively high levels of wind generation • Written at the level of the utility planner, assuming a basic understanding of economic dispatch of generators and elementary statistics Outlines the role of wind forecasting in wind valuation studies Evaluates the importance of estimating wind generation to meet peak demand Researches how the market structure effects the value of wind energy Discusses power systems that utilize relatively large fractions of wind power Highlights the operating procedures that can enhance the value of wind generation
Determining The Capacity Value Of Wind
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Author : Michael R. Milligan
language : en
Publisher:
Release Date : 2008
Determining The Capacity Value Of Wind written by Michael R. Milligan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Electric utilities categories.
This paper examines the various methods used to estimate the capacity value of wind and is an update of a paper we presented at WINDPOWER 2005. This paper summarizes several important state and regional studies that examine the capacity value of wind energy, how different regions define and implement capacity reserve requirements across the country, and how wind energy is defined as a capacity resource in those regions. Updates on changes to the capacity value of wind in ERCOT, ISO New England, PJM, California, and New York will be provided. We also provide an overview of wind capacity value in Europe.
The Effects Of Energy Storage Properties And Forecast Accuracy On Mitigating Variability In Wind Power Generation
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Author : Christina A. Jaworsky
language : en
Publisher:
Release Date : 2013
The Effects Of Energy Storage Properties And Forecast Accuracy On Mitigating Variability In Wind Power Generation written by Christina A. Jaworsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Electricity generation from wind power is increasing worldwide. Wind power can offset traditional fossil fuel generators which is beneficial to the environment. However, wind generation is unpredictable. Wind speeds have minute to minute variability which causes minute to minute generation to fluctuate. Additionally, wind forecasting does not perfectly predict wind generation, so it is difficult for wind to meet a generation schedule. Therefore, with increased wind production, there is a need for flexibility in the electricity grid. Electricity storage is one method of achieving greater flexibility. With storage, wind generators can have a less variable power output. They can also be made to follow a generation schedule the same way traditional generation does. This study discusses the storage requirements for reducing the variability of wind power. It also assesses the value of an accurate forecast in terms of storage requirements. Storage capacity requirements are shown to be modest compared to the size of a generator, representing approximately one minute of full power generation capacity. Accurate forecasting can reduce the storage requirements of a wind generator. However, forecasts have little added value for greater accuracy beyond correctly predicting the mean of the wind generation on delivery scheduling intervals.