DSP (digital signal processor) based energy-feedback electronic load grid-connected inverting system and control method thereof

The invention discloses a DSP (digital signal processor) based energy-feedback electronic load grid-connected inverting system and a control method thereof. The system comprises a main circuit and a control circuit. The main circuit comprises a grid-connected inverting module and an output filter module in sequential connection, the grid-connected inverting module is connected with a 400V DC (direct-current) output end of a booster system, the output filter module is connected with a public power grid phase, and the control circuit comprises a fault protection circuit module, a current voltage sampling and signal processing module, a human-computer interaction module, a DSP embedded system module and a high-frequency driving module. Fully digitalized control of the grid-connected inverting system is realized by a reliability test aiming at low-voltage direct-current power output characteristics for the first time in China, on the basis of the high-frequency PWM (pulse-width modulation) technology and adopting an industrial-level high-performance digital signal processor DSP chip, 400V high-voltage direct-current output by the energy-feedback electronic load booster system is inverted into 220V single-phase power-frequency current, and an output side is connected into a power grid.