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Preface
Effects of environmental, economic, social, political and technical factors have led to the rapid deployment of various sources of renewable energy-based power generation.
The incorporation of these generation technologies have led to the development of a broad array of new methods and tools to integrate this new form of generation into the power system network. This book, arranged into six sections,
tries to highlight various renewable energy based generation technologies. Section 1 provides a general overview of the wind power technology, where the classification of wind turbines based on generators, power electronic converters, and grid connection is described in detail. In Chapter 1, the fundamentals of wind power systems and their design aspects are presented; the modeling methods ofthe wind phenomenon and turbine mechanical system are described in Chapter 2.
Chapter 3 presents modeling and integration of wind power systems to the grid, while a literature review on the technologies and methods used for wind resource assessment (WRA) and optimum wind turbine location is presented in Chapter 4.In the next chapter, the descriptions of the different types of economic analysis methods are presented with case studies. The operation and control of a line side converter used in variable-speed wind energy conversion systems under balanced and unbalanced grid voltages conditions is discussed in Chapter 6, and lastly, the wake effect from wind turbines on overhead lines and, in particular, a tower line close to wind farms is analyzed in Chapter 7. Section 2 is on solar energy. Although sun charts are widely used, there are situations where charts are inadequate and precise computations are preferred. This is discussed in Chapter 8 as a computational approach that is applicable to both thermal collection/conversion processes and photovoltaics (PV) systems.
In Chapter 9, the different types of PV systems, grid-connected and stand-alone, designing of stand-alone PV system, both for electricity supply to remote homes and solar water pumping systems, are presented. Concentrated solar power appears to be a method of choice for large capacity, utility-scale electric generation in the vii viii Preface near future, in particular, distributed trough systems, which represent a reasonably mature approach. The power tower configuration is also a viable candidate. Both these technologies have the possibility of energy storage and auxiliary heat production during the unavailability of sunlight, and a discussion on this is carried out in Chapter 10. Chapter 11 presents various overviews on battery-operated solar energy storage, its charging technologies and performance, and maximum power point tracking (MPPT). Non-grid solar thermal technologies like water heating systems, solar cookers, solar drying applications and solar thermal building designs are simple and can be readily adopted, as can be seen in Chapter 12. The solar tunnel dryer is one of the promising technologies for large scale agricultural and industrial processes. In this technology, the loading and unloading of material in process is relatively easy and thus, more quantity can be dried at lower cost, as discussed in Chapter 13.

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