MATLAB Simulation of PWM Rectifiers with Implementation Details

The simulation program for PWM rectifier in MATLAB is correct and functionally validated. The implementation typically includes key components such as: - Space Vector Pulse Width Modulation (SVPWM) algorithm for precise voltage control - Double closed-loop control structure (outer voltage loop and inner current loop) - Insulated Gate Bipolar Transistor (IGBT) switching models with proper dead-time compensation - Phase-Locked Loop (PLL) synchronization for grid connection The simulation parameters commonly involve grid voltage specifications (e.g., 380V/50Hz), DC-link capacitance values, switching frequencies (typically 10-20kHz), and load conditions. Performance metrics include total harmonic distortion (THD) analysis, power factor measurements, and dynamic response testing under load variations. PWM rectifiers are crucial in power electronics for their ability to achieve near-unity power factor, bidirectional power flow, and low harmonic distortion compared to conventional diode/thyristor rectifiers. They are widely applied in motor drives, renewable energy systems, and Uninterruptible Power Supplies (UPS). The simulation demonstrates implementation considerations for different PWM rectifier topologies including voltage-source and current-source configurations, highlighting their respective control characteristics and stability analysis methods. The code structure typically organizes functions into modular blocks: main simulation file, PWM generation subroutine, controller calculation module, and data logging/visualization scripts. Key MATLAB functions employed may include ode solvers for system dynamics, FFT analysis tools for harmonic assessment, and Simulink Power Systems工具箱 components for power circuit modeling.