Voltage regulating and stabilizing device

The utility model discloses a voltage regulating and stabilizing device applied to the field of power transmission and transformation. The voltage regulating and stabilizing device consists of a main circuit and a control circuit, wherein the main circuit comprises chopper switch tubes V1 to V4, an output transformer Tr, an output filter, and rectifier diodes VD1 to VD4, the bridge type chopper switch tubes are connected in series between a commercial power supply and a load through the output transformer Tr and a secondary of the output filter; and the control circuit comprises a voltage rectification detection circuit, a comparison circuit, a triangle generator and a state switching trigger circuit. The voltage regulating and stabilizing device of the utility model can continuously regulate a compensating voltage according to a reference voltage set by a user, and can complete regulating and compensating for an amplitude of the voltage in a few milliseconds; and when an input voltage rises or drops quickly, the voltage regulating and stabilizing device can stabilize an output voltage quickly, thus compared to a traditional mechanical type voltage stabilizer and a non-contact compensated type voltage stabilizer, the voltage regulating and stabilizing device has advantages.