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可控硅交流调压的负载是大功率升压变压器。若同一相的正、负脉冲不对称，直流分量加大。变压器对直流是短路的，直流电流过大，则会烧毁可控硅。本文提出一种工程上实用的调试方法来解决这一问题。
Thyristor AC voltage regulator load is a high-power step-up transformer. If the same phase of the positive and negative pulse asymmetry, DC component increases. Transformer DC is short-circuit, DC current is too large, it will burn SCR. This article presents a practical debugging method to solve this problem.