The CNKHZ power frequency uninterruptible power supply is a new generation of industrial grade digital UPS power supply, which uses reliable DSP digital signal processors and IGBT space vector pulse width modulation (SVPWM). It is mainly developed to meet the requirements of various power grid environments and high-end electric fields.Adopting an online dual transformation topology design, DSP microcomputer processing chip, automated program processing, combined with the latest high-power IGB inverter and SCR static bypass technology, UPS protection technology, green power supply technology, battery management technology, parallel technology, network monitoring technology and other nine major technological advantages, on the basis of stable, reliable, and efficient all digital technology, a large capacity, high-power pure sine wave intelligent UPS uninterruptible power supply is designed that integrates digitization, informatization, and networking. Thoroughly improving the drawbacks of low control accuracy and slow control speed in traditional analog circuits, and effectively solving the inherent problem of parameter drift in traditional analog circuits. The system detection and control are faster, more precise, and more stable, comprehensively improving the reliability, power supply quality, and product consistency of UPS.