Active Power Filter (APF) Simulation Based on Triangular Carrier Wave

The simulation of a triangular carrier wave-based active power filter (APF) developed for my graduation project proved both fascinating and technically challenging. Through this implementation, I gained deep insights into APF operational principles and PWM rectifier design methodologies. The simulation involved critical parameter optimization including triangular carrier frequency selection (typically 2-10 kHz range) and amplitude modulation ratio adjustment (ma=0.8-1.0) to achieve optimal harmonic compensation. Key implementation aspects included developing hysteresis current control algorithms and proportional-integral (PI) controller tuning for DC-link voltage regulation. The project highlighted APF's significance in power quality improvement, particularly for harmonic mitigation in renewable energy integration and industrial power applications. The simulation results demonstrate effective THD reduction below 5% through proper switching frequency optimization and controller gain calibration. This work provides practical reference for future APF and PWM rectifier designs, incorporating real-time harmonic detection using FFT algorithms and space vector modulation techniques for enhanced performance.