Abstract
A high-efficiency micro-grid simulation system based on STM32 is designed. The hardware circuit includes two three-phase half-bridge inverter circuits, AC voltage and current sampling circuits, and LC filter circuits. STM32F407 is used as the main controller, and outputs SVPWM waves. The main inverter has low THD when running on its own, so that can stably convert DC power into three-phase AC power. When working in parallel, the system realizes that the output power ratio of the two inverter circuits is adjustable. Through theoretical analysis and testing, the micro-grid has high efficiency, and the circuit also performs well when testing the load regulation rate. In addition, the system uses OLED screens and matrix keyboards to achieve human-computer interaction, and has overcurrent and overvoltage protection functions.
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