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Wind Energy Systems by Mohd. Hasan Ali

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Chapter 4

Power Electronics

4.1 Introduction

Power electronics is the application of solid-state electronics for the control and conversion of electric power. Power electronic converters can be found wherever there is a need to modify a form of electrical energy (i.e., change its voltage, current, or frequency). Variable-speed wind generator systems need a power electronic interface between the generator and the grid. Even for fixed-speed wind generator systems, when the energy storage system is connected to the grid power electronics devices are essential. This chapter provides a brief overview and basic understanding of various power electronics devices: rectifiers, inverters, direct current (DC)-to-DC choppers, cycloconverters, pulse width ...

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