Three-phase power regeneration system

To tackle key issues in modern power electronic systems—low energy efficiency, grid harmonic pollution, and poor dynamic response—this paper designs a three-phase energy feedback system using an STM32 microcontroller. Its hardware includes a three-phase full-bridge inverter, a power factor-corrected rectifier, precision sampling circuits, and a core control unit. Software integrates a proportional resonant controller, a second-order generalized integral phase-locked loop, and an effective value PID algorithm. Experiments show the system enables bidirectional high-efficiency power flow, ensures AC waveform quality and voltage stability, and meets requirements for harmonic suppression, load adaptability, and feedback efficiency, offering an effective solution for industrial energy management.