Compensation type voltage stabilized power supply

The invention discloses a compensation type voltage stabilized power supply and belongs to the field of high-frequency single-conversion type power supplies. The load voltage is equal to the algebraicsum of the output voltage and the input voltage of a compensation circuit 3. The load current is equal to the output current of the compensation circuit 3. The compensation circuit 3 is controlled tooutput a current phase position, so the input power factors of the compensation type voltage stabilized power supply can be controlled. The input voltage and the output voltage of the compensation circuit 3 are quite low, so a low-voltage big-current MOS switch device can be selected and used, thereby reducing energy consumption and facilitating capacity expansion. Compared with the document titled 'A compensation type power supply' [201510051636.3], the essential difference is that the structure of a self-coupling transformer 2 of an input end and the external connection wire thereof are changed, and an optional swit