Simulation of Three-Level Dual-Loop SPWM Active Power Filter

This paper presents a comprehensive simulation of a three-level dual-loop SPWM (Sinusoidal Pulse Width Modulation) active power filter. The simulation covers multiple technical aspects including: the structural configuration and operational principles of power filters, fundamental concepts and characteristics of SPWM modulation techniques, implementation methodologies for active power filters, and relevant simulation tools and software platforms. The implementation typically involves MATLAB/Simulink modeling with specific functions for harmonic detection algorithms, DC voltage control loops, and current tracking controllers. Key simulation components include Clarke/Park transformations for harmonic extraction, PR (Proportional Resonant) or PI controllers for voltage/current regulation, and SPWM pulse generation modules using carrier comparison techniques. Furthermore, this study provides detailed analysis of simulation results, examines performance data, and discusses practical applications in power systems. Through this technical exposition, readers will gain thorough understanding of three-level dual-loop SPWM active power filter simulation and develop deeper insights into its applications in modern power quality management systems.