Traditional TCRs compensate reactive power from high voltage side of transformer, so it demands highly of thyristor and its protection and measurement, thus the cost ofequipment is higher.
This paper proposes a method for Var compensation by use a device of thyristor switch series transformer to change the capacitor voltage.
提出一种用晶闸管开关装置串联变压器来改变电容端电压以调节无功的补偿方法。
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In addition, equivalent series reactance of excitation transformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor.