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The advantages and disadvantages of SCR static thyristor excitation and brushless AC excitation

          SCR stationary SCR excitation mode started in the 70s of last century, brushless AC excitation than late about 10 years. SCR SCR basic principle is the use of the semiconductor diode, as the original reversing. Used to change the polarity of the AC current that references the main generator. Turn the referenced AC into DC. SCR SCR excitation, in the classification of self-excitation. This excitation method completely eliminated the excitation with exciter way, the excitation from the moving excitation into static excitation. As a result, the weight of the generator is reduced. 

          The basic principle of SCR excitation is to use a thyristor as a rectifier that supplies a small proportion of the AC power from the synchronous generator either directly from the synchronous generator terminal or through an addi- tional additional winding in a rectifier transformer or generator and After rectification into the generator rotor excitation winding, as excitation purposes, and the SCR components by the automatic voltage regulator to control its conduction angle, so as to adjust the size of the generator excitation current to maintain the generator terminal voltage Stable.

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