Página 1 dos resultados de 86 itens digitais encontrados em 0.006 segundos
Wind-CSP short-term coordination by MILP approach
Fonte: Institution of Engineering and Technology
Publicador: Institution of Engineering and Technology
Tipo: Artigo de Revista Científica
Publicado em //2014
ENG
Relevância na Pesquisa
56.22%
This paper is on the maximization of total profit in a day-ahead market for a price-taker producer needing a short-term scheduling for wind power plants coordination with concentrated solar power plants, having thermal energy storage systems. The optimization approach proposed for the maximization of profit is a mixed-integer linear programming problem. The approach considers not only transmission grid constraints, but also technical operating constraints on both wind and concentrated solar power plants. Then, an improved short-term scheduling coordination is provided due to the more accurate modelling presented in this paper. Computer simulation results based on data for the Iberian wind and concentrated solar power plants illustrate the coordination benefits and show the effectiveness of the approach.
Link permanente para citações:
Options for a Low Carbon Energy Future in Morocco
Fonte: Washington, DC
Publicador: Washington, DC
EN_US
Relevância na Pesquisa
46.36%
#ABATEMENT COST#ABATEMENT MEASURES#AIR#AIR POLLUTION#ALTERNATIVE ENERGY#ATMOSPHERE#AVAILABILITY#BASES#BIOMASS#BIOMASS FIRING#BIOMASS POWER
Morocco s economy is growing rapidly in
all its sectors (tourism, agriculture, industry , etc.)
Consequently, the energy demand has been increasing steadily
in the period 2003-2007 when primary energy demand rose by
5% per annum and electricity demand by 8% per annum. At the
request of the World Bank Group, this study was launched
having 3 main objectives: An analysis of the current
characteristics of energy supply and demand, the assessment
of the energy strategy of Morocco for the coming years, and
then a development of an alternative energy scenario with
low carbon energies. Beicip-Franlab has established a
detailed energy balance of Morocco on the basis ofMoroccan
and international studies already conducted on the energy
sector of Morocco as well as on well known databases like
IEA ones.For the period 2009-2030, Morocco has
defined an energy strategy which was presented during the
first Assises de l Energie organized in March 2009. An
assessment of this strategy considering both energy and
environmental criteria will be presented in order to be
compared with the business as usual
scenario.Finally an alternative scenario is
proposed. Based on an intensive introduction
ofrenewable energy (RE) and energy efficiency
(EE)...
Link permanente para citações:
Private Sector, Small Scale, Grid-connected Renewable Power Generation in Sri Lanka : A Review of the Experience of the Past Decade 1996 to 2006
Fonte: Washington, DC
Publicador: Washington, DC
EN_US
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46.5%
#ACCESS TO ELECTRICITY#APPROACH#ATMOSPHERE#AVAILABILITY#BIO-ENERGY#BIOGAS#BIOMASS#BIOMASS FUEL#BIOMASS PLANTS#BIOMASS POWER#BIOMASS RESOURCE
The objective of this report, therefore,
is to provide a comprehensive analysis of the development of
the renewable power generation sector in the country over a
period of ten years, from 1996 to 2006, as a reference for
the design of future policy and market interventions in Sri
Lanka and other countries. This analysis aims to assist
stakeholders to assess the potential for growth in terms of
energy contribution from indigenous renewable resources,
private sector investment and rural infrastructure
development. The report also serves to reveal the
conflicting priorities of stakeholders, which impact the
development of indigenous energy resources, and thereby
create a platform for constructive debate towards realizing
a sustainable and optimal outcome for the country.
Link permanente para citações:
Revisiting Public-Private Partnerships in the Power Sector
Fonte: Washington, DC: World Bank
Publicador: Washington, DC: World Bank
EN_US
Relevância na Pesquisa
46.27%
#ABATEMENT#ABATEMENT COST#ABATEMENT POTENTIAL#ACCESS TO ELECTRICITY#ADAPTATION TO CLIMATE CHANGE#AIR#ALLOCATION#ANNUAL COST#APPROACH#AUCTION#AUCTIONS
As the world demand for energy continues
to grow, a big question is where will all the energy come
from and what will the price tag be. With such enormous sums
needed, public-private partnerships (PPPs) could play a big
role. But the financial crisis has raised worries about
funding, and much is still not known about how best to
attract PPPs. This report reviews the evidence to date with
sectoral reforms and considers different approaches in
varying circumstances to help outline the potential role of
the private and public sector in: 1) strengthening the
corporate governance of private and public utilities; 2)
helping governments to establish legal, regulatory,
contractual, and fiscal frameworks; and 3) improved market
governance to attract private investment. Chapter one
reviews the impact of the recent financial crisis on PPP
investment compared with what happened in earlier financial
crises. It also looks out the latest projections for
additional power sector investment needed because of climate
change and the possible sources of financing. Chapter two
examines how PPP investment in the power sector has fared.
It also gives the results of an econometric study that
explores which types of incentives and variables matter most
to PPPs when they are weighing entering the power sector...
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How Fit are Feed-in Tariff Policies? Evidence from the European Wind Market
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
EN_US
Relevância na Pesquisa
46.34%
#ALTITUDE#ANNUAL WIND GENERATION#AVAILABILITY#BALANCE#BIDDING#CAPACITY FACTOR#CLEAN ENERGY#CLIMATE#CO#CONVENTIONAL ELECTRICITY#COST OF GAS
Feed-in tariffs have become the most
widely used policy instrument to promote renewable energy
deployment around the world. This paper examines the
relation between tariff setting and policy outcome based on
wind capacity expansion in 35 European countries over the
1991-2010 period. Using a dynamic panel data model, it
estimates the long-run elasticity of wind deployment with
respect to the level of feed-in support. The analysis finds
that higher subsidies do not necessarily yield greater
levels of wind installation. Non-economic barriers and
rent-seeking may have contributed to the weak correlation.
On the other hand, the length of feed-in contract and
guaranteed grid access are important determinants of policy
effectiveness. A one-year extension of an original 5-year
agreement on average increases wind investment by 6 percent
annually, while providing an interconnection guarantee
almost doubles wind investment in one year.
Link permanente para citações:
Power Purchase Agreements for Small Power Producers
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
EN_US
Relevância na Pesquisa
56.17%
#ALTERNATIVE ENERGY#ALTERNATIVE ENERGY PROGRAM#BIOMASS#BIOMASS POWER#BIOMASS POWER PLANTS#CAPACITY PAYMENTS#CAPITAL EQUIPMENT#CAPTIVE CUSTOMERS#CASH FLOW#COMPETITIVE BIDDING#CONTRACT PRICES
Five Asian nations, India, Indonesia,
Sri Lanka, Thailand, and Vietnam began designing or
instituting Small Power Producer (SPP) programs in the
mid-1990s to support energy development jointly with the
private sector. This note draws on important markers and
lessons for other countries on how to implement similar
programs based on these experiences. While all Asian
programs demonstrate certain commonalities due to
fundamental legal relationships, each experience has been
tailored to local conditions and requirements. Some have
introduced innovative bidding, competitive, or incentive
structures. The result is a rich palette of experience with
small power projects in Asia.
Link permanente para citações:
Designing Strategies and Instruments to Address Power Projects Stress Situations
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
EN_US
Relevância na Pesquisa
46.28%
#ACID#ACID RAIN#AFFORDABLE ENERGY#AIR#AIR POLLUTION#AIR POLLUTION PROBLEMS#APPROACH#AVAILABILITY#BALANCE#BASES#BENEFITS OF HYDROPOWER
It is an internationally recognized
reality that continued and increased investment in the power
sector by private firms is essential to providing affordable
and reliable energy to an increasing portion of the world
population. However, investing in power projects in the
developing regions of the world exposes nations,
governments, consumers, and investors to unusually high
levels of risk. This study will have succeeded if it
encourages parties, on all sides, to recognize problems as
early as possible and concentrate on identifying possible
solutions, and then implementing them. This study marks the
interest of investors and lenders in finding procedures and
instruments to facilitate the resolution of disputes arising
from stress situations. To begin with we will summarize the
predominant causes, characteristics, and consequences of
project stress in the energy sector of emerging markets. The
author will seek to describe and understand the incidence of
various patterns of characteristics and consequences of
project stress that emerge as power projects are broken down
by type industry stage and region. Then the author will
discuss how to prevent the emergence of stress situations in
power projects as well as the instruments and strategies
available for the resolution of power project stress.
Link permanente para citações:
Optimal operation of a pumped-storage hydro plant that compensates the imbalances of a wind power producer
Fonte: Elsevier
Publicador: Elsevier
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/article
Formato: application/pdf
Publicado em /09/2011
ENG
Relevância na Pesquisa
76.26%
#Wind power#Management of forecast errors#Pumping storage#Wind-hydro coordination#Wind power scenarios#Optimization#Ingeniería Industrial
The participation of wind energy in electricity markets requires providing a forecast for future energy production of a wind generator, whose value will be its scheduled energy. Deviations from this schedule because of prediction errors could imply the payment of imbalance costs. In order to decrease these costs, a joint operation between a wind farm and a hydro-pump plant is proposed; the hydro-pump plant changes its production to compensate wind power prediction errors. In order to optimize this operation, the uncertainty of the wind power forecast is modeled and quantified. This uncertainty is included in an optimization problem that shifts the production of the hydro-pump plant in an optimal way, aiming at reducing the imbalance costs. The result of such a method is profitable for both participants, the wind farm and the hydro-pump plant. A realistic test case is used to evaluate the proposed method.; The authors thanks for the financial support granted by the Ministerio de Ciencia e Innovación of Spain, IREMEL project with reference ENE2010-16074, called “Integración de Energías Renovables en el Mercado de Electricidad” and ANEMOS.plus and Integrated Action IT2009-0063 projects.
Link permanente para citações:
Economic effects of a high share of renewable energies on power systems
Fonte: Universidade Carlos III de Madrid
Publicador: Universidade Carlos III de Madrid
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
56.33%
The aim of this thesis is to study the participation of renewable energies in the Spanish power system. For this purpose, two kind of studies have been developed in the present work. On the one hand, the first part of the work aims to assess the participation of wind energy producers in the Spanish electricity market. On the other hand, the overall effects of an increased installed capacity of renewable energies on the power system are evaluated. Due to the intermittent nature and the low predictability of wind power, the participation of this energy in the day-ahead market implies large deviations from the initial schedule, which leads to a cost that has to be borne by the wind farm owner. By means of short term wind power prediction programs, these losses may be reduced, and, if the market allows the possibility of updating previous bids at intraday markets, the total income of the wind power producers can be increased by a significant percent. The imbalance losses for a wind power producer are important, and may be reduced by strategic bidding. Then, a tool that maximizes the incomes of wind power producers in electricity markets is employed in this study. Through a stochastic process a strategic bidding algorithm is designed, which takes into account the variables involved in the process...
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Impact of wind power uncertainty forecasting on the market integration of wind energy in Spain
Fonte: ELSEVIER SCI LTD
Publicador: ELSEVIER SCI LTD
Tipo: Articles in periodicals and books
Formato: Printed
ENG
Relevância na Pesquisa
56.22%
The growing share of electricity production from variable renewable energy sources increases the stochastic nature of the power system. This has repercussions on the markets for electricity. Deviations from forecasted production schedules requires balancing and buying or selling short term products on power or reserve markets and provides opportunities to actors who can offer flexibility in the short term. To model the value of flexibility using stochastic scenario extensions requires as a first step understanding the nature of the uncertainty. This study provides a new approach for determining the forecast errors of wind power generation in the time period between the closing of the day ahead and the intraday markets for the example of Spain. The methodology has been developed using time series analysis for the years 2010-2013 to find the explanatory variables of the wind error variability; applying clustering techniques to reduce the range of the uncertainty; and regressive techniques to forecast the probability density functions of the price of the intra-day. This methodology has been tested considering different system actions showing its suitability for developing intra-day bidding strategies and also for the generation of RES-E scenarios. This methodology could allow a wind power producer to optimally bid into the intraday market based on more accurate scenarios...
Link permanente para citações:
Utility-Scale Solar Photovoltaic Power Plants; A Project Developer’s Guide
Fonte: Washington, DC
Publicador: Washington, DC
Tipo: Working Paper; Publications & Research; Publications & Research :: Working Paper
ENGLISH; EN_US
Relevância na Pesquisa
46.29%
#TAX INCENTIVES#VERTICAL AXIS#TRANSMISSION CAPACITY#POWER PLANTS#PLANT OWNERS#UTILITY GRID#RENEWABLE PORTFOLIO STANDARD#SOLAR RESOURCE#ELECTRICITY TARIFF#PRICE OF POWER#ENERGY PRICING
With an installed capacity greater than
137 gigawatts (GWs) worldwide and annual additions of about
40 GWs in recent years, solar photovoltaic (PV) technology
has become an increasingly important energy supply option. A
substantial decline in the cost of solar PV power plants (80
percent reduction since 2008) has improved solar PV’s
competitiveness, reducing the needs for subsidies and
enabling solar to compete with other power generation
options in some markets. The World Bank Group (including the
International Bank for Reconstruction and Development, the
International Development Association, International Finance
Corporation (IFC), and the Multilateral Investment Guarantee
Agency) helps client countries secure the affordable,
reliable, and sustainable energy supply needed to end
extreme poverty and promote shared prosperity. The approach
mirrors the objectives of the sustainable energy for all
initiative - achieving universal access, accelerating
improvements in energy efficiency, and doubling the global
share of renewable energy by 2030. The World Bank Group
recognizes that each country determines its own path for
achieving its energy aspirations...
Link permanente para citações:
Guidelines for Economic Analysis of Power Sector Projects; Renewable Energy Projects
Fonte: Washington, DC
Publicador: Washington, DC
Tipo: Working Paper; Publications & Research; Publications & Research :: Working Paper
ENGLISH; EN_US
Relevância na Pesquisa
46.34%
#AIR EMISSION#EMPLOYMENT#TRANSMISSION CAPACITY#NUCLEAR REACTORS#SUSTAINABLE ENERGY FUTURE#PUBLIC UTILITIES#OIL PRICE#ENERGY MARKETS#AIR POLLUTION DAMAGE#FLUE GAS#FOSSIL FUELS
These guidelines are directed to the economic analysis of power sector policy analysis and the appraisal of power sector investment projects. The general guidance is complemented by an Annex Volume that contains relevant technical notes, a glossary, and an extended Bibliography. In this first edition, the focus of the technical notes is on grid-connected renewable energy projects. In FY16 the scope of the technical notes will be extended to cover transmission & distribution, rural electrification, off-grid, energy efficiency, and thermal projects.
Link permanente para citações:
Wind Energy in Colombia : A Framework for Market Entry
Fonte: World Bank
Publicador: World Bank
Tipo: Publications & Research :: Publication; Publications & Research :: Publication
ENGLISH
Relevância na Pesquisa
56.38%
#ADEQUATE COMPENSATION#AMOUNT OF POWER#ANNUAL ELECTRICITY#ANTHRACITE#APPROACH#ASH#AVAILABILITY#BALANCE#BARRELS PER DAY#CALCULATION#CAPACITY FACTOR
The purpose of this report is to provide
decision makers in Colombia (and by extension other
countries or regions), who are considering the deployment or
consolidation of wind power, with a set of options to
promote its use. The options presented are the result of an
analysis of the Colombian market; this analysis included
simulations and modeling of the country's power sector,
and extensive consultations with operators, managers, and
agents. More information on the analysis and simulations is
presented in the appendixes. Wind was chosen to exemplify
the range of renewable energy alternatives available to
complement traditional power sector technologies on the
basis of its technical maturity, its relatively low cost
compared to other options, the country's experience,
and its wind power potential. This report constitutes the
second phase of a barrier analysis to wind energy in Colombia.
Link permanente para citações:
Vietnam Power Sector : Generation Options
Fonte: Washington, DC
Publicador: Washington, DC
Tipo: Economic & Sector Work :: Energy Study; Economic & Sector Work
ENGLISH; EN_US
Relevância na Pesquisa
46.29%
#ACID#ACID RAIN#AIR#ALTERNATIVE ENERGY#AMBIENT CONDITIONS#ANTHRACITE#APPROACH#ASH#ASH CONTENT#AVAILABILITY#BALANCE
This report discusses the energy sector
in Vietnam. The central task for the energy sector is to
meet demands for electricity in sufficient quantity and of
an acceptable quality, in as commercially and financially
efficient a way as possible. Several issues arise if this
task is to be accomplished in the short and medium term.
They are: optimizing power investments; financing the
investments that must be made; implementing the reforms in
the power industry and restructuring EVN; improving access
and service quality; and addressing shortcomings in pricing
and tariffs. This study discusses the first of these issues,
though inevitably there is some overlap. The study has four
specific objectives: (1) to inform decisions about
technology choices; (2) to inform decisions on energy and
energy sector policy; (3) to inform the energy sector
planning process; and (4) to inform the internal discussion
within the Bank on how Vietnam's energy sector
development can be assisted.
Link permanente para citações:
Implementing Onshore Wind Power Projects
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
Tipo: Journal Article; Publications & Research :: Brief
EN_US
Relevância na Pesquisa
56.36%
#access roads#Air#Air density#availability#batteries#birds#BOTTOM LINE#capacity credit#capacity factor#capacity factors#climate
The kinetic energy in wind is converted into mechanical power in specialized propeller-driven turbines mounted on towers. A generator inside the turbine converts the mechanical power into electricity. Utility-scale wind turbines range in size from 100 kilowatts to as large as several megawatts. Turbines can be built on land or offshore and are grouped into 'wind farms' that provide bulk power to the electrical grid. Smaller turbines are used for homes, telecommunications dishes, and water pumping, sometimes in connection with diesel generators, batteries, and photovoltaic systems. Such hybrid wind systems are typically used in remote, off-grid locations, where a connection to the utility grid is not available. This note focuses on onshore wind energy, which is more widely established and has lower risks than offshore wind.
Link permanente para citações:
Energizing Economic Growth in Ghana : Making the Power and Petroleum Sectors Rise to the Challenge
Fonte: Washington, DC
Publicador: Washington, DC
Tipo: Economic & Sector Work :: Energy-Environment Review; Economic & Sector Work
ENGLISH; EN_US
Relevância na Pesquisa
46.32%
#ACCESS TO ELECTRICITY#AIR#ALTERNATIVE FUEL#ALTERNATIVE FUELS#ALUMINUM#APPROACH#ASSOCIATED GAS#AVAILABILITY#BALANCE#BARREL#BARRELS PER DAY
The main objective of this report is to
provide the new Government of Ghana with recommendations on
the actions needed to improve the performance of
Ghana's energy sector. The report focuses on the power
and petroleum sectors, taking account of the interdependence
between the sectors, and providing recommendations for how
they can, together, drive future economic growth. This
report aims to highlight the centrality of fixing the
problems in the power sector as a path to ensuring that
Ghana's economic growth ambitions are not stymied by a
lack of electricity. The problems and their solutions are
well known; what has been lacking is decisive and timely
decision making to break the tendency to adopt reactive
measures that often come too late when proactive measures
will have led to better outcomes. Demand for gas in the
power sector is set to expand rapidly, as new thermal
generation capacity is built to meet rapidly growing power
demand. However, to ensure successful development of its gas
sector, Ghana will need to address a number of important
challenges. The paper is organized as follows: chapter one
gives introduction; chapter two deals with electricity
demand and supply; chapter three deals with resolving
generation and transmission bottlenecks; chapter four gives
reforms urgently needed in power distribution; chapter five
focuses on natural gas sector; and chapter six focuses on
upstream oil and gas sector.
Link permanente para citações:
Uzbekistan : Energy/Power Sector Issues Note
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
Tipo: Economic & Sector Work :: Energy Study
ENGLISH; EN_US
Relevância na Pesquisa
46.28%
#AIR#AIR TEMPERATURE#APPROACH#AVAILABILITY#AVIATION FUEL#BALANCE#BARREL OF OIL#BARRELS OF OIL#BIOMASS#BOILER#BOILER HOUSE
This note focuses on the energy and
power sector in Uzbekistan with the purpose of identifying
some of the key issues faced by the sector and outlining
potential solutions. In particular, the note aims to inform
the Government thinking by providing input on priorities in
the sector. The note also outlines potential solutions the
Government may want to consider to address the identified
challenges in the short and longer time and highlights the
areas where the Government can start acting immediately. The
analysis is based on the information and data provided by
the Government during preparation of the Bank's
investment lending operations, other analytical work as well
as data/information collected from public sources. The note
is structured as follows: section one discusses the
importance of the energy sector to the economy and provides
an overview of the sector. Section two provides a more
detailed overview of the power sector. Section three
identifies the principal challenges in the power sector.
Section four proposes potential solutions to address these
challenges. Finally...
Link permanente para citações:
Planning for Higher Oil Prices : Power Sector Impact in Latin America and the Caribbean
Fonte: World Bank, Washington, DC
Publicador: World Bank, Washington, DC
Tipo: Economic & Sector Work :: Energy Study
ENGLISH; EN_US
Relevância na Pesquisa
46.31%
#ADVERSE EFFECTS#AMOUNT OF OIL#APPROACH#ATMOSPHERE#AVAILABILITY#BALANCE#BARREL#BARREL OIL#BARREL PRICE#BARRELS PER DAY#BIOMASS
A scenario with higher oil prices has
important implications for diverting from oil-based
technologies to renewables, as well as gas, coal, and
nuclear alternatives. By 2030, energy demand in Latin
America and the Caribbean (LAC) is expected to double from
2008 levels. A key issue is deciding on the most appropriate
mix of fuels for power generation, given the various prices
of energy sources and technologies, as well as availability
of renewable energy. The study's broad aim is to
evaluate the impact of higher oil prices on the cost of
generating electricity in countries of the LAC region so
that better-informed energy policy planners can buffer
future adverse effects. The study defines high oil prices as
those above United States (U.S.) $100 per barrel. This price
is considered a reasonable starting point for discussion
given the recent range in oil prices, which averaged $95 a
barrel in 2011. A price of $150 per barrel is defined as
considerably high yet plausible given historical and current
price levels...
Link permanente para citações:
Offering Strategies of Wind Power Producers in a Day-Ahead Electricity Market
Fonte: SPRINGER, Heidelberg, Germany
Publicador: SPRINGER, Heidelberg, Germany
Tipo: Aula
ENG
Relevância na Pesquisa
76.33%
This paper presents a stochastic optimization-based approach applied
to offer strategies of a wind power producer in a day-ahead electricity market.
Further from facing the uncertainty on the wind power the market forces wind
power producers to face the uncertainty of the market-clearing electricity price.
Also, the producer faces penalties in case of being unable to fulfill the offer. An
efficient mixed-integer linear program is presented to develop the offering
strategies, having as a goal the maximization of profit. A case study with data
from the Iberian Electricity Market is presented and results are discussed to
show the effectiveness of the proposed approach.
Link permanente para citações:
Offer strategy for a wind power producer in day-ahead market
Fonte: 16th IEEE International Conference on Computer as a Tool — EUROCON 2015
Publicador: 16th IEEE International Conference on Computer as a Tool — EUROCON 2015
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
96.36%
Energy conversion from renewable energy has
been possible due to extra-market supporting policies. The extramarket
approach survives for low penetration levels, but as
energy from wind penetration increases the extra-market policies
are expected to become untenable. A wind power producer
(WPP) should expect full competition in deregulated electricity
market, i.e., has to have an offer strategy to be competitive. A
WPP has to face uncertainties on available wind energy and
market prices. Uncertainties have to be conveniently addressed;
otherwise a decrease on the financial results is expected. A
stochastic programming approach is presented to suitable
address those uncertainties. The problem formulation is
approached in the way of writing equations in order to benefit
from the well-established mixed integer linear program (MILP)
solvers in order to compute an offering strategy. A case study
with data from the Iberian Electricity Market is used to illustrate
the effectiveness of the proposed approach.
Link permanente para citações: