Saturday, April 28, 2018
The Electric Generators Handbook SYNCHRONOUS GENERATORS By ION BOLDEA
The Electric Generators Handbook SYNCHRONOUS GENERATORS By ION BOLDEA
Preface :
Electric energy is a key ingredient in a community at the civilization level. Natural (fossil) fuels, such as coal, natural gas, and nuclear fuel, are fired to produce heat in a combustor, and then the thermal energy is converted into mechanical energy in a turbine (prime mover). The turbine drives the electric generator to produce electric energy. Water potential and kinetic energy and wind energy are also converted to mechanical energy in a prime mover (turbine) that, in turn, drives an electric generator. All primary energy resources are limited, and they have thermal and chemical (pollutant) effects on the environment. So far, most electric energy is produced in rather constant-speed-regulated synchronous generators that deliver constant alternating current (AC) voltage and frequency energy into regional and national electric power systems that then transport it and distribute it to various consumers. In an effort to reduce environment effects, electric energy markets were recently made more open, and more flexible, distributed electric power systems emerged. The introduction of distributed power systems is leading to increased diversity and the spread of a wider range of power/unit electric energy suppliers. Stability and quick and efficient delivery and control of electric power in such distributed systems require some degree of power electronics control to allow for lower speed for lower power in the electric generators in order to better tap the primary fuel energy potential and increase efficiency and stability.
This is how variable speed electric generators recently came into play, up to the 400 (300) megavolt ampere (MVA)/unit size, as pump-storage wound-rotor induction generators/motors, which have been at work since 1996 in Japan and since 2004 in Germany. The present handbook takes an in-depth approach to both constant and variable-speed generator systems that operate in stand-alone and at power grid capacities. From topologies, through steady-state modeling and performance characteristics to transient modeling, control, design, and testing, the most representative standard and recently proposed electric generator systems are treated in dedicated chapters. This handbook contains most parameter expressions and models required for full modeling, design, and control, with numerous case studies and results from the literature to enforce the assimilation of the art of electric generators by senior undergraduate students, graduate students, faculty, and, especially, by industrial engineers, who investigate, design, control, test, and exploit the latter for higher-energy con version ratios and better control. This handbook represents a single-author unitary view of the multi faceted world of electric generators, with standard and recent art included. The handbook consists of two volumes: Synchronous Generators and Variable Speed Generators.
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Electrical
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Electrical
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