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Educational and Technological Approaches to Renewable Energy

Edited By Walter Leal Filho and Julia Gottwald

This book documents and disseminates a number of educational and technological approaches to renewable energy, with a special emphasis on European and Latin American experiences, but also presenting experiences from other parts of the world. It was prepared as part of the project JELARE (Joint European-Latin American Universities Renewable Energy Project), undertaken as part of the ALFA III Programme of the European Commission involving countries in Latin America (e.g. Bolivia, Brazil, Chile, Guatemala) as well as in Europe (Germany and Latvia). Thanks to its approach and structure, this book will prove useful to all those dedicated to the development of the renewable energy sector, especially those concerned with the problems posed by lack of expertise and lack of training in this field.

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A Study of Voltage Dips and Disturbances in Spanish Photovoltaic Power Plants

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J. Guerrero-Pérez, F. Espín, J. Martínez, A. Molina-García, E. Gómez Lázaro1 Abstract Some European transmission network operators are proposing additional grid connection requirements for renewable power plants, particularly wind farms. These requirements will be extended to photovoltaic plants during the forthcom- ing years to include this renewable source as a significant power contribution avoiding undesirable interruptions from voltage dips or disturbances. Within this framework, the paper discusses a preliminary study of voltage dips and distur- bances measured in Spanish photovoltaic power plants. This analysis gives addi- tional information about the requirements demanded by the new generation of inverters and the minimum characteristics they should offer in a mid-term. Real measurements have been recorded in Spanish photovoltaic plants over several months, from both AC and DC sides. A full description of the results, as well as a detailed analysis of the disturbances in comparison with previous data collected in Spanish wind farms, are also included in the paper. I. Introduction Power supply from photovoltaic (PV) power plants has increased considerably over the past years, mainly due to the development of new solar panel technolo- gies as well as different policies and incentives offered in several countries. In this case, PV plants will become a relevant influence on the operation of power systems in the near future. As the operation of power systems is supported by grid codes producing a set of requirements for all network users to comply to, some European transmission network operators have...

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