The self and shunt excitation system only have one excitationtransformer, and it is the cheapest and the most simple one.
自并励励磁系统只采用一台励磁变压器,是自励系统中接线最简单,造价最低廉的一种。
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It is suggested that the excitationtransformer power be introduced as the operational power supply for the regulator, and the rotor overvoltage protection of the unit be modified.
In addition, equivalent series reactance of excitationtransformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor.