The project "Wind and Hydrogen Based Autonomous Energy Supply System" within possibility of use of the synchronous generator with independent excitation in autonomous power supply system which is based on wind and hydrogen power is estimated. To use this generator in wind turbine, it is necessary to develop self-excitation system of synchronous generator at which presence there will be no necessity to apply the additional exciter. For a basis the self-excitation system of synchronous machine [1] with connected to the stator rectifier to which output the excitation winding is connected is chosen. The main disadvantage of this system is uncertain and, probably, low-level residual magnetism of the generator in the self-excitation beginning that reduces reliability of the system. In [2] a brushless excitation system of synchronous generator is described. This system consists of a 3-phase stationary field generator which AC output is rectified by a group of rectifiers. The DC output from the rectifiers is connected directly to the field winding of the generator. This system is difficult and unreliable in exploitation because of the built-in exciter. Similar systems also in [3] and [4] are described.
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