Implementation of PWM Rectifier Using SVPWM Technique

This text discusses the implementation of a PWM rectifier using SVPWM (Space Vector Pulse Width Modulation) technology, achieved through dual-loop control with MATLAB simulation. To better explain this process, we can detail the relationship between SVPWM and PWM rectifiers along with the working principle of dual-loop control. SVPWM is a space vector pulse width modulation technique commonly employed in PWM rectifiers for power modulation and control. The PWM rectifier serves as a power converter that transforms DC voltage into pulse voltage. The dual-loop control method regulates system current and voltage while ensuring stability and reliability. Through these approaches, we can implement SVPWM applications and conduct MATLAB simulations. From a coding perspective, the implementation typically involves creating SVPWM switching patterns using mathematical transformations of voltage vectors across different sectors. The dual-loop control structure generally consists of an outer voltage loop and an inner current loop, where the voltage controller generates current references for the current controller. In MATLAB/Simulink, this can be modeled using PWM generator blocks, PI controllers for both loops, and power electronics components like IGBT bridges. The SVPWM algorithm calculates appropriate switching times based on reference voltage vectors and DC bus voltage, while the control loops maintain proper power factor and DC link voltage regulation.