Active Power Filter PWM Simulation - Implementation and Analysis

In this paper, we present methodologies for PWM (Pulse Width Modulation) simulation using Active Power Filters (APF). The implementation typically involves MATLAB/Simulink models where the harmonic extraction algorithm employs Instantaneous Power Theory (p-q theory) or Fourier analysis techniques. We first examine the fundamental definition and operational principles of active filters, including their circuit applications in power quality improvement. The simulation framework includes reference current generation using phase-locked loops (PLL) and DC-link voltage control loops. Subsequently, we detail the core principles and applications of PWM modulation, particularly space vector PWM (SVPWM) implementation with switching frequency optimization algorithms. The role of APF in PWM systems is demonstrated through hysteresis current control implementations and proportional-integral (PI) controller tuning methods. Furthermore, we discuss laboratory testing procedures for APF PWM simulations, including THD (Total Harmonic Distortion) calculation algorithms and real-time waveform analysis using FFT techniques. The results analysis section covers performance metrics comparison under different load conditions and stability assessment methods. Finally, we conclude with key findings and provide recommendations for future research directions, including adaptive control algorithms and artificial intelligence-based optimization approaches for enhanced harmonic compensation.