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Analysis and NN-based control of doubly fed induction generator in wind power generation

Soares, Orlando; Gonçalves, Henrique; Martins, António; Carvalho, Adriano
Fonte: Renewable Energy & Power Quality Journal Publicador: Renewable Energy & Power Quality Journal
Tipo: Artigo de Revista Científica
Português
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46.11%
With the increasing size of wind power generation it is required to perform power system stability analysis that uses dynamic wind generator models. In this paper are presented all the wind power system components, including the turbine, the generator, the power electronic converter and controllers. The aim is to study the Doubly Fed Induction Generator (DFIG) operation and its connection to the power system, either during normal operation or during transient grid fault events. Two different control system design technologies are present, the first is performed by standard PI controllers and the second is based on artificial neural networks

Water-power at Niagara Falls to be successfully utilized : its objects, facilities and resources, inducements for manufacturers, etc. /

Niagara River Hydraulic Tunnel, Power and Sewer Co.
Fonte: Buffalo : Matthews, Northrup, Publicador: Buffalo : Matthews, Northrup,
Tipo: Artigo de Revista Científica
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The lithograph, "General view of lands, tunnel and docks of Niagara River Hydraulic Tunnel, Power and Sewer Company," called for p. [4] in the Index, has been removed and encapsulated, and is shelved separately.

Canadian Niagara Power League Meeting (1897)

Canadian Niagara Power League. Meeting (1897 : Niagara Falls, Ont.); Rakine, William Birch
Fonte: Brock University Publicador: Brock University
Tipo: Livro
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Remarks of Mr. William B. Rankine, secretary of the Canadian Niagara Power Company.

Greening the Wind : Environmental and Social Considerations for Wind Power Development

Ledec, George C.; Rapp, Kennan W.; Aiello, Roberto G.
Fonte: World Bank Publicador: World Bank
Português
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This report identifies good practices for managing the key environmental and social issues associated with wind power development and provides advice on how best to address these issues in project planning, construction, and operation and maintenance. It provides detailed background information on wind power, with special focus on two emerging themes of growing scientific and public interest: namely the biodiversity-related impacts and the broader socioeconomic and cultural dimensions of wind power development. Like wind power itself, the scope of this report is worldwide although special attention is paid to the issues characteristic of the Latin America and Caribbean (LAC) region. While the principal focus is on land-based wind power, it also briefly addresses the environmental and social impacts related to off shore wind development. Wind power today is widely regarded as a key component of an environmentally sustainable, low-carbon energy future because it is renewable, requires almost no water, and generates near-zero emissions of greenhouse gases and other pollutants. In many parts of the world...

Investigation and Research of China Power Social Universal Services

North China Electric Power University
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
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The investigation conducted by this project concernt China power social universal services include: the investigation on the actuality of the domestic power social universal services or on the other industries and the research and study on abroad services. Through research of the domestic power social universal service, we could realize the actuality of the domestic power social universal services, hold the scale of the requirement, the characteristics of the region, and also the existing problems and obstacles of the universal service, furthermore, calculate the amount of capital that power social universal services needed; then draw the successful experience of domestic and foreign services to make suggestions on the policy, regulatory measures and implementation of programs which are adapt to the development of China power social universal service.

Revisiting Policy Options on the Market Structure in the Power Sector

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Português
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The objectives of this study are to develop a taxonomy of the existing power market structures, as shown by the extent of vertical and horizontal unbundling found among restructured power systems, across developing countries; to design an analytical framework for assessing the desirability of unbundling under the variety of economic conditions found among developing countries; and To propose insights for operational guidance on alternative market structures based on relevant criteria, in particular on the initial conditions of a country and its power sector. The study specifically examines whether power system size and country per capita income can be reliable indicators of initial conditions for guiding policy on power market structure. This guidance is needed to address issues such as whether there are solid foundations for recommending vertical unbundling for small power systems in low-income countries, particularly in the absence of short term privatization prospects. The policy recommendations therefore have to be tailored to the specific taxonomy of market structures that characterize the electricity sector in developing countries. The study reports the evidence from econometric analysis and case studies on the (relative) success of achieving the objectives of unbundling. These objectives may be to enhance transparency and governance...

Development of a Regional Power Market in the Greater Mekong Sub-Region : Compatibility of Regulatory Systems and Pricing Principles

Vernstrom, Robert
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
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A 1999 study by the Bank, which summarized the unprecedented opportunity for economic, and environmental benefits for individual countries, and the entire Greater Mekong Sub-region (GMS) associated with cross-border power trade, concluded that a full trade scenario, could yield significant savings over the next two decades, even before quantifying substantial environmental benefits. Based on these conclusions, GMS member countries were surveyed (attached as an appendix), and, this report compares the status of institutional/regulatory, and commercial policies across the region, to provide background information. Specifically, the focus is on the compatibility of national regulatory systems, especially for wheeling; the compatibility of pricing principles at both production, and transmission; and, the potential barriers to enhanced trade, which are revealed in this review. Section 2 provides a brief review of on-going reforms in member countries. Section 3 compares progress with respect to key regulatory, and commercial issues (particularly pricing) most critical to power trade...

The Potential of Regional Power Sector Integration : South African Power Pool Transmission and Trading Case Study

Economic Consulting Associates
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
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Developing countries are increasingly pursuing and benefitting from regional power system integration (RPSI) as an important strategy to help provide reliable, affordable electricity to their economies and citizens. Increased electricity cooperation and trade between countries can enhance energy security, bring economies-of-scale in investments, facilitate financing, enable greater renewable energy penetration, and allow synergistic sharing of complementary resources. This briefing note draws from the experiences of RPSI schemes around the world to present a set of findings to help address these challenges. It is based on case studies of 12 RPSI projects and how they are dealing with key aspects of RPSI, such as: (i) finding the right level of integration; (ii) optimizing investment on a regional basis; (iii) appropriate regional institutions (iv) technical and regulatory harmonization; (v) power sector reform and integration (vi) the role of donor agencies (vii) reducing emissions through RPSI; and (viii) RPSI and renewable energy.

The Potential of Regional Power Sector Integration : Greater Mekong Subregion Transmission and Trading Case Study

Economic Consulting Associates
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
Relevância na Pesquisa
36.24%
Developing countries are increasingly pursuing and benefitting from regional power system integration (RPSI) as an important strategy to help provide reliable, affordable electricity to their economies and citizens. Increased electricity cooperation and trade between countries can enhance energy security, bring economies-of-scale in investments, facilitate financing, enable greater renewable energy penetration, and allow synergistic sharing of complementary resources. This briefing note draws from the experiences of RPSI schemes around the world to present a set of findings to help address these challenges. It is based on case studies of 12 RPSI projects and how they are dealing with key aspects of RPSI, such as: (i) finding the right level of integration; (ii) optimizing investment on a regional basis; (iii) appropriate regional institutions (iv) technical and regulatory harmonization; (v) power sector reform and integration (vi) the role of donor agencies (vii) reducing emissions through RPSI; and (viii) RPSI and renewable energy.

India Power Sector Diagnostic Review : More Power to India - The Challenge of Distribution

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Português
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36.24%
This report reviews the evolution of the Indian power sector since the landmark Electricity Act of 2003 (EA 2003, or EA), with a focus on distribution as key to performance and viability of the sector. While all three segments of the power sector generation, transmission, and distribution are important, revenues originate with the customer at distribution, so subpar performance there hurts the entire value chain. Persistent operational and financial shortcomings in distribution have repeatedly led to central bailouts for the whole sector, even though power is a concurrent 1 subject under the Indian constitution and distribution is almost entirely under state control. Ominously, the recent sharp increase in private investment and market borrowing means power sector difficulties are more likely to spill over to lenders and affect the broader financial sector. Government-initiated reform efforts first focused on the generation and transmission segments, reflecting the urgent need for adding capacity and the complexity of issues to be addressed at the consumer interface. Consequently...

Private Participation in the Indian Power Sector : Lessons from Two Decades of Experience

Mukherjee, Mohua
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
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This book reviews the major developments in and the lessons learned from the 21-year (1991-2012) experience with private sector participation (PSP) in the power sector in India. It discusses the political economy context of the policy changes, looks at reform initiatives that were implemented for the generation sector, describes transmission and distribution segments at different points in the evolution of the sector, and concludes with a summary of lessons learned and a suggested way forward. The evolution of private participation in the Indian power sector can be divided into different phases. Phase one was launched with the opening of the generation sector to private investment in 1991. Phase two soon followed - early experiments with state-level unbundling and other reform initiatives, including regulatory reform, culminating in divestiture, and privatization in Orissa and Delhi respectively. Phase three, the passage of the electricity act of 2003 by the central government, followed by a large increase in private entry into generation and forays into transmission and experiments with distribution franchise models in urban and rural areas during the 11th five-year plan (2007-12) period. In phase four...

Power inverter for photovoltaic plant and expertise in power control for wind generators

Arnaltes Gómez, Santiago
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Relatório Formato: application/pdf
Publicado em 14/04/2008 Português
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The Power System Control Group of a Madrid based university has developed a technology that allows the control of power inverters for photovoltaic plants grid connection. The research group has a great deal of experience in R&D projects dealing with the modelling and control of electrical machines, mainly for wind energy and photovoltaic applications, and renewable energy grid integration. They are seeking companies in these energy sectors, for a technical cooperation

Research and innovation in power electronics systems applied to energy management

Barrado Bautista, Andrés
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Relatório Formato: application/pdf
Publicado em 15/04/2008 Português
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The Power Electronics Systems Group (GSEP) at University Carlos III de Madrid (Spain) offers its wide experience and background in consultancy, R&D projects with private and public funding and pre-industrial prototype building in four main topics: energy conversion (design, modelling and prototyping of equipments and systems), magnetic components modelling and design, photovoltaic systems and electromagnetic compatibility (EMC).

Study of the current performance of the European power transformer fleet

Ortiz Fernández, Alfredo; Fernández Diego, Cristina; Olmo Salas, Cristian; Carcedo Haya, Juan; Renedo Estébanez, Carlos Javier; Delgado San Román, Fernando
Fonte: European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ) Publicador: European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ)
Tipo: info:eu-repo/semantics/article; publishedVersion
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In many countries, diverse legislations are today asking for more rational use of energy. For this reason, several initiatives are nowadays promoting a reduction of the overall energy consumption. The European Union has published a Directive 2009/125/EC which fix eco-design requirements to energy-related products. One of these products is power transformers which are a basic piece of generation, transmission, distribution and consumption of electrical energy. The operation of these machines implies the transformation of energy, a part of this energy is dissipated in electrical and magnetic circuits. The amount of losses produce by transformers is defined during the design of these machines. So, they must comply with the above EU Directive. In fact, the Official Journal of the European Union has set a list of energy efficiency limits to be fulfilled by new machines sold in Europe (Commission Regulation 548/2014). This article presents three parts. The calculation of the maximum performance is presented in the first part. This is independent of the load percentage, the impedance and the voltage level. A description of the European fleet of power transformer, up to 100MVA is presented on the second section. In the last part of this work...

Preliminary results of a power quality survey in a distribution network bases on No‐Gap PQ meters

González, A.; Madrazo Maza, Alfredo; Laso Pérez, Alberto; Martínez Torre, Raquel; Domingo Fernández, Rodrigo; Mañana Canteli, Mario; Arroyo Gutiérrez, Alberto; Cavia Soto, María de los Ángeles
Fonte: European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ) Publicador: European Association for the Development of Renewable Energies, Environment and Power Quality (EA4EPQ)
Tipo: info:eu-repo/semantics/article; publishedVersion
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This paper describes a preliminary experience with the installation and use of a no-gap power quality meter network along a distribution grid in the North of Spain. No-gap power quality meters record all cycles of voltage and current waveform for all the monitored channels. This approach extends the analysis further than the classical approach provided by other power quality meters that records only survey data and events triggered according predefined rules. A comparison with the classical approach is discussed and the results of a two year power quality survey are also provided.

Utility-Scale Solar Photovoltaic Power Plants; A Project Developer’s Guide

International Finance Corporation
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Working Paper; Publications & Research; Publications & Research :: Working Paper
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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...

More Power to India : The Challenge of Electricity Distribution

Pargal, Sheoli; Banerjee, Sudeshna Ghosh
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
Tipo: Publications & Research :: Publication
Português
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36.24%
This report assesses progress in implementing the government of India's power sector reform agenda and examines the performance of the sector along different dimensions. India has emphasized that an efficient, resilient, and financially robust power sector is essential for growth and poverty reduction. Almost all investment-climate surveys point to poor availability and quality of power as critical constraints to commercial and manufacturing activity and national competitiveness. Further, more than 300 million Indians live without electricity, and those with power must cope with unreliable supply, pointing to huge unsatisfied demand and restricted consumer welfare. This report reviews the evolution of the Indian power sector since the landmark Electricity Act of 2003, with a focus on distribution as key to the performance and viability of the sector. While all three segments of the power sector (generation, transmission, and distribution) are important, revenues originate with the customer at distribution...

Underpowered : The State of the Power Sector in Sub-Saharan Africa

Eberhard, Anton; Foster, Vivien; Briceño-Garmendia, Cecilia; Ouedraogo, Fatimata; Camos, Daniel; Shkaratan, Maria
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Economic & Sector Work :: Energy Study; Economic & Sector Work
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Sub-Saharan Africa is in the midst of a power crisis marked by insufficient generating capacity, unreliable supplies, high prices, and low rates of popular access to the electricity grid. The region's capacity for generating power is lower than that of any other world region, and growth in that capacity has stagnated. The average price of power in Sub-Saharan Africa is double that of other developing regions, but supply is unreliable. Because new household connections in many countries are not keeping up with population growth, the electrification rate, already low, is actually declining. The manifestations of the current crisis are symptoms of deeper problems that are explored in this study of power sector institutions in 24 countries of Sub-Saharan Africa, which draws extensively on a new body of research undertaken as part of the multi-donor Africa Infrastructure Country Diagnostic (AICD). There are nearly 60 medium- to longer-term power sector projects involving the private sector in the region excluding leases for emergency power generation. Almost half of these are independent power producers (IPPs). Involving more than $2 billion of private sector investment...

Beyond Crisis : The Financial Performance of India's Power Sector

Khurana, Mani; Banerjee, Sudeshna Ghosh
Fonte: Washington, DC: World Bank Publicador: Washington, DC: World Bank
Tipo: Publications & Research :: Publication
Português
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At the end of 2011, the Indian power sector found itself in financial crisis, just a decade after the 2001 bailout of state electricity boards (SEBs) by the central government. Bankrupt state power distribution utilities in several states were unable to pay their bills or repay their debts. Despite the passage of the landmark 2003 Electricity Act and implementation of a broad set of reforms over the past decade, the sector today is looking at another rescue from the center, four times larger than before. This financial rescue scheme amounts to about Rs 1.9 trillion ($42 billion) and was instigated by the nonperforming assets of the banks and other financial institutions. The Electricity Act was envisaged to create independent companies functioning on commercial principles, but they are still far away from that goal. This report presents a diagnostic of the financial and operational performance of segments in the power sector value chain between adoption of the Electricity Act, 2003, and 2011, including analysis of the factors that contributed to the recent crisis. The report focuses on efficiency and productivity...

Physical clearing mechanisms in power industry

Atkins, Karla; Homan, Christopher; Marathe, Achla
Fonte: IEEE: Proceedings of the 2004 IEEE PES Power Systems Conference and Exposition Publicador: IEEE: Proceedings of the 2004 IEEE PES Power Systems Conference and Exposition
Tipo: Proceedings
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This paper studies the performance of several different physical clearing mechanisms in the electricity market. The study is done using the simulation tool, Marketecture, developed at the Los Alamos National Laboratory. Two cities, Portland and Chicago, are used for simulating the physical clearing algorithms. The algorithms were chosen according to their ability to serve as a proxy for some of the well known policies. Our results show that, based on the economic measures chosen, both cities perform very similarly under the different physical clearing mechanisms.; "Physical Clearing Mechanisms in Power Industry," Proceedings of the 2004 IEEE PES Power Systems Conference and Exposition. Held in New York, New York: 10-13 October 2004.; ©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.