High-power AC compensation purifying valtage-regulated power supply

The utility model relates to an AC compensation-purifying and voltage-stabilizing power supply with high power. The utility model is characterized in that a primary voltage-stabilizing part comprises at least a transformer, a plurality of power switches, an input sampling circuit, a comparison circuit 1 and monolithic computers 1, 2 which are connected with the power switch and the comparison circuit 1; a secondary voltage-stabilizing part comprises a middle sampling circuit, a comparison circuit 2 which is connected with the middle sampling circuit, the monolithic computers 1, 2, a main loop, an output sampling circuit, a comparison circuit 3, a zero passage collection circuit which is connected with the main loop and a monolithic computer 3, wherein, the monolithic computer 3 receives signals of the zero passage collection circuit and the comparison circuit and interchanges the information with the monolithic computers 1, 2, and outputs the given signal to control a bidirectional thyristor after the treatment.