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Author: Marco Iván Perdomo Mercado
Publisher:
ISBN:
Category :
Languages : es
Pages :
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Book Description
El siguiente trabajo muestra el funcionamiento del control de un inversor trifásico fotovoltaico conectado a la red eléctrica, con la capacidad de poder solventar fallos en la red eléctrica mediante la variación de inyección tanto de potencia activa como reactiva. Para poder caracterizar los diferentes tipos de huecos de tensión, hemos realizado un estudio teórico para poder observar el efecto de las tensiones mediante un control en lazo abierto. Para llevar a cabo este estudio tenemos que tener en cuenta cuatro parámetros (Potencia activa, Potencia reactiva y dos variables de control). Basándonos en el estudio anterior proponemos un algoritmo de control en lazo cerrado que sea capaz de detectar, caracterizar y solventar los diferentes tipos de huecos de tensión, utilizando para ello diversos ajustes de inyección tanto de potencia activa como reactiva. La capacidad de solventar los huecos está limitada por la potencia de la huerta fotovoltaica. Una vez detallado el funcionamiento del algoritmo de control comprobaremos su funcionalidad con los resultados obtenidos mediante diferentes pruebas realizadas en el entorno Matlab Simulink.
Author: Marco Iván Perdomo Mercado
Publisher:
ISBN:
Category :
Languages : es
Pages :
Get Book Here
Book Description
El siguiente trabajo muestra el funcionamiento del control de un inversor trifásico fotovoltaico conectado a la red eléctrica, con la capacidad de poder solventar fallos en la red eléctrica mediante la variación de inyección tanto de potencia activa como reactiva. Para poder caracterizar los diferentes tipos de huecos de tensión, hemos realizado un estudio teórico para poder observar el efecto de las tensiones mediante un control en lazo abierto. Para llevar a cabo este estudio tenemos que tener en cuenta cuatro parámetros (Potencia activa, Potencia reactiva y dos variables de control). Basándonos en el estudio anterior proponemos un algoritmo de control en lazo cerrado que sea capaz de detectar, caracterizar y solventar los diferentes tipos de huecos de tensión, utilizando para ello diversos ajustes de inyección tanto de potencia activa como reactiva. La capacidad de solventar los huecos está limitada por la potencia de la huerta fotovoltaica. Una vez detallado el funcionamiento del algoritmo de control comprobaremos su funcionalidad con los resultados obtenidos mediante diferentes pruebas realizadas en el entorno Matlab Simulink.
Author: Eloy-Garcia Carrasco Joaquin
Publisher: Editorial Academica Espanola
ISBN: 9783844344790
Category :
Languages : es
Pages : 160
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Book Description
La electronica de potencia juega un papel fundamental en las nuevas redes electricas, en las que es cada vez mas comun encontrar inversores entre los generadores y la red. En este escenario, las exigencias sobre el inversor se han ido incrementando en los ultimos anos: mejores respuestas dinamicas, adaptabilidad ante fallos la red, etc. Esto ha propiciado la aparicion de nuevas estrategias de control, como el Control Directo de Potencia (CDP). En este libro se presenta un estudio del CDP aplicado a inversores conectados a la red. Previamente se hace una revision de las principales tecnicas de control de inversores conectados a la red. Los fundamentos del CDP se explican sobre un inversor de dos niveles de tension y se hacen extensivos a inversores multinivel a traves del llamado EDPC, Control Directo de Potencia Extendido, un algoritmo de CDP generico valido para inversores multinivel de cualquier numero de niveles de tension. Los resultados que se presentan se obtuvieron con un inversor de tres niveles de tension con enclavamiento por diodos del punto medio. Finalmente, se hace un estudio del comportamiento del CDP en redes desequilibradas y se proponen mejoras en su control."
Author: Javier Morales López
Publisher:
ISBN:
Category :
Languages : es
Pages :
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Book Description
Se presenta el funcionamiento de un inversor trifásico fotovoltaico con capacidad de inyección de potencia reactiva a la red eléctrica cuando esta se encuentra en fallo. Las redes de distribución eléctrica presentan unos códigos y normas que describen el comportamiento de la fuente de energía ante los fallos de red, con referencia a la inyección de potencia reactiva para permanecer conectado a la misma. Se propone un novedoso algoritmo de control que pueda tratar distintos tipos de fallos en la red, aportando a esta un apoyo de voltaje flexible. De esta forma el algoritmo se encarga de detectar, caracterizar y solventar los huecos de tensión que se dan en la red, empleando diferentes estrategias de inyección de potencia reactiva dependiendo de las características del fallo. Una vez expuestas detalladamente las distintas estrategias se realiza una comparación de sus funcionalidades mediante los resultados obtenidos de diferentes pruebas realizas en el entorno de programación Matlab Simulink.
Author: Nora Clichevsky
Publisher:
ISBN: 9781558441491
Category : Land use, Urban
Languages : en
Pages : 0
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Book Description
Vacant urban land--the product of land market activity, the actions of private agents, and the policies of public agents--is an important challenge for policy makers. Vacant lots on the urban fringe and in central and interstitial areas have affected growth patterns in Latin America. Contributors to this book analyze the problems and opportunities related to vacant urban land in five cities: Buenos Aires, Argentina; Rio de Janeiro, Brazil; Quito, Ecuador; Lima, Perú; and San Salvador, El Salvador.
Author: Nikos Hatziargyriou
Publisher: John Wiley & Sons
ISBN: 1118720687
Category : Technology & Engineering
Languages : en
Pages : 340
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Book Description
Microgrids are the most innovative area in the electric power industry today. Future microgrids could exist as energy-balanced cells within existing power distribution grids or stand-alone power networks within small communities. A definitive presentation on all aspects of microgrids, this text examines the operation of microgrids – their control concepts and advanced architectures including multi-microgrids. It takes a logical approach to overview the purpose and the technical aspects of microgrids, discussing the social, economic and environmental benefits to power system operation. The book also presents microgrid design and control issues, including protection and explaining how to implement centralized and decentralized control strategies. Key features: original, state-of-the-art research material written by internationally respected contributors unique case studies demonstrating success stories from real-world pilot sites from Europe, the Americas, Japan and China examines market and regulatory settings for microgrids, and provides evaluation results under standard test conditions a look to the future – technical solutions to maximize the value of distributed energy along with the principles and criteria for developing commercial and regulatory frameworks for microgrids Offering broad yet balanced coverage, this volume is an entry point to this very topical area of power delivery for electric power engineers familiar with medium and low voltage distribution systems, utility operators in microgrids, power systems researchers and academics. It is also a useful reference for system planners and operators, manufacturers and network operators, government regulators, and postgraduate power systems students. CONTRIBUTORS Thomas Degner Aris Dimeas Alfred Engler Nuno Gil Asier Gil de Muro Guillermo Jiménez-Estévez George Kariniotakis George Korres André Madureira Meiqin Mao Chris Marnay Jose Miguel Yarza Satoshi Morozumi Alexander Oudalov Frank van Overbeeke Rodrigo Palma Behnke Joao Abel Pecas Lopes Fernanda Resende John Romankiewicz Christine Schwaegerl Nikos Soultanis Liang Tao Antonis Tsikalakis
Author: Lester R. Brown
Publisher: W. W. Norton & Company
ISBN: 0393344150
Category : Nature
Languages : en
Pages : 161
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Book Description
With food supplies tightening, countries are competing for the land and waterresources needed to feed their people.
Author: Fernando M. Reimers
Publisher: Springer Nature
ISBN: 3030821595
Category : COVID-19 Pandemic, 2020-
Languages : en
Pages : 352
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Book Description
Based on twenty case studies of universities worldwide, and on a survey administered to leaders in 101 universities, this open access book shows that, amidst the significant challenges caused by the COVID-19 pandemic, universities found ways to engage with schools to support them in sustaining educational opportunity. In doing so, they generated considerable innovation, which reinforced the integration of the research and outreach functions of the university. The evidence suggests that universities are indeed open systems, in interaction with their environment, able to discover changes that can influence them and to change in response to those changes. They are also able, in the success of their efforts to mitigate the educational impact of the pandemic, to create better futures, as the result of the innovations they can generate. This challenges the view of universities as "ivory towers" being isolated from the surrounding environment and detached from local problems. As they reached out to schools, universities not only generated clear and valuable innovations to sustain educational opportunity and to improve it, this process also contributed to transform internal university processes in ways that enhanced their own ability to deliver on the third mission of outreach
Author: James Gleick
Publisher: Vintage
ISBN: 0307379574
Category : Science
Languages : en
Pages : 400
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Book Description
From the bestselling author of the acclaimed Chaos and Genius comes a thoughtful and provocative exploration of the big ideas of the modern era: Information, communication, and information theory. Acclaimed science writer James Gleick presents an eye-opening vision of how our relationship to information has transformed the very nature of human consciousness. A fascinating intellectual journey through the history of communication and information, from the language of Africa’s talking drums to the invention of written alphabets; from the electronic transmission of code to the origins of information theory, into the new information age and the current deluge of news, tweets, images, and blogs. Along the way, Gleick profiles key innovators, including Charles Babbage, Ada Lovelace, Samuel Morse, and Claude Shannon, and reveals how our understanding of information is transforming not only how we look at the world, but how we live. A New York Times Notable Book A Los Angeles Times and Cleveland Plain Dealer Best Book of the Year Winner of the PEN/E. O. Wilson Literary Science Writing Award
Author: Rob Flickenger
Publisher: "O'Reilly Media, Inc."
ISBN: 9780596005023
Category : Computers
Languages : en
Pages : 190
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Book Description
Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.
Author: Jose M. Herrou Aragon
Publisher: José M. Herrou Aragón
ISBN: 1471725693
Category : Religion
Languages : en
Pages : 107
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Book Description
Gnosis means knowledge. But we are not referring to just any knowledge. Gnosis is knowledge which produces a great transformation in those who receive it. Knowledge capable of nothing less than waking up man and helping him to escape from the prison in which he finds himself. That is why Gnosis has been so persecuted throughout the course of history, because it is knowledge considered dangerous for the religious and political authorities who govern mankind from the shadows. Every time this religion, absolutely different from the rest, appears before man, the other religions unite to try to destroy or hide it again. Primordial Gnosis is the original Gnosis, true Gnosis, eternal Gnosis, Gnostic knowledge in its pure form. Due to multiple persecutions, Primordial Gnosis has been fragmented, distorted and hidden.
