Alternating-current voltage-stabilized power supply and control device thereof

The invention discloses an alternating-current voltage-stabilized power supply and a control device thereof. The control device comprises a high-speed metering chip, a first acquisition circuit and a microcontroller, wherein the high-speed metering chip has at least one group of differential signal input ends; the high speed is 50Hz or above; at least one path of the first acquisition circuit is arranged, the two ends of the input side of each path of voltage acquisition circuit are respectively used for connecting voltage ends corresponding to two-phase live wires at the output side of the alternating-current voltage-stabilized power supply, the two ends of the output side are respectively grounded through a divider resistor, and voltages divided by the two divider resistors are input into a group of differential signal input ends of the high-speed metering chip; and an input end of the microcontroller is connected with an output end of the high-speed metering chip, an output end of the microcontroller is us