Wide-range contactless voltage stabilizer

he invention provides a wide-range contactless voltage stabilizer. The wide-range contactless voltage stabilizer comprises a compensating transformer T1, a boosting transformer T2, four IGBTs (Insulated Gate Bipolar Translators), four thyristors, a capacitor and an inductor, wherein the a live line L of an input voltage passes through one end of the secondary side of the compensating transformer T1, the other end of the secondary side of the compensating transformer T1 is connected to a voltage regulating module circuit and also connected to a middle fixed tap of the boosting transformer T2, the highest voltage end of the boosting transformer T2 is connected to an output live fire terminal; a null line N of input electric supply is connected with the other end of the boosting transformer T2 and serves as a working null line of the boosting transformer T2 and the complete machine; the primary input of the compensating transformer T1 is regulated by controlling on and off of the four IGBTs and the four thyristo