Three-Phase Shunt Active Power Filter with ip-iq Current Detection and Triangle Wave Comparison Control

This paper discusses a method for harmonic current suppression using a three-phase shunt active power filter based on instantaneous reactive power theory with ip-iq current detection and triangle wave comparison control. This approach effectively reduces harmonic issues in power systems while enhancing system stability and reliability. The implementation typically involves digital signal processing (DSP) or FPGA platforms, where the ip-iq detection algorithm calculates instantaneous active and reactive currents through Clarke and Park transformations. The triangle wave comparison method generates PWM signals by comparing reference signals with high-frequency carrier waves, ensuring precise switching control for harmonic compensation. Key functions include real-time harmonic current extraction, reference current generation, and inverter switching control. The system monitors load currents, computes harmonic components using the ip-iq method, and generates compensating currents through voltage-source inverters. This filter technology can be applied across various scenarios including industrial and commercial power systems, as well as renewable energy integration systems. The combination of instantaneous reactive power theory-based detection and triangle wave comparison control makes this three-phase shunt active power filter an effective solution worthy of further research and practical applications.