Introduction
This project aims to design a dispersing proportional resonance (PR) controller for selective harmonic current compensation in shunt active power filters (APF). Harmonics generated by nonlinear loads deteriorate power quality and cause equipment malfunction. The PR controller targets specific harmonic frequencies by providing infinite gain at the resonant frequency, enabling precise compensation. The dispersing PR approach enhances stability and robustness, enabling the filter to effectively eliminate targeted harmonics without affecting the fundamental components.
Objectives
- Develop a dispersing proportional resonance controller for selective harmonic cancellation in shunt APFs.
- Enhance power quality by reducing harmonics and improving current waveforms.
- Analyze controller stability and robustness under varying load conditions.
- Validate the control strategy via simulation and real-time implementation.
Methodologies
- Design PR controllers tuned to eliminate dominant harmonics (e.g., 3rd, 5th, 7th).
- Mathematical and frequency domain analysis of control loop stability.
- Simulation of APF operation with dispersing PR controller using MATLAB/Simulink.
- Hardware implementation on a DSP or microcontroller-based platform with real-time harmonic compensation.
- Performance evaluation through Total Harmonic Distortion (THD) analysis and dynamic response tests.
Expected Outcomes
- Significant reduction of selected harmonic currents improving power quality.
- Stable and robust controller operation under dynamic load changes.
- Lower THD of source currents meeting international standards (e.g., IEC 61000).
- Practical implementation feasibility demonstrated through experimental results.
Applications
- Industrial and commercial power systems with nonlinear loads.
- Renewable energy integration requiring harmonic compensation.
- Power quality improvement in data centers, hospitals, and manufacturing units.
- Advanced active power filters for smart grids and microgrids.
