Direct Current Control of PWM Rectifier with Dual-Loop Control Implementation

PWM rectifier is a circuit widely used in power electronics, primarily functioning to convert alternating current (AC) input to direct current (DC) output. Typically, PWM rectifiers employ a dual-loop control system where one feedback loop regulates DC voltage stability while the other controls output current magnitude. The control algorithm may utilize PI controllers for each loop, with the inner current loop ensuring fast dynamic response and the outer voltage loop maintaining steady-state accuracy. Implementation often involves Clarke/Park transformations for grid synchronization and space vector PWM (SVPWM) techniques for precise switching control. After iterative debugging procedures including parameter tuning and stability analysis, the circuit has passed validation tests demonstrating adequate performance. In practical applications, the performance and stability of PWM rectifiers are critical as they directly impact the operational reliability of entire power electronic systems.