Introduction
With the rapid integration of renewable energy and power electronic devices into modern grids, single-phase grid-connected inverters have become widely used in photovoltaic systems, battery storage, and distributed generation. However, these inverters often introduce supraharmonic emissions (2–150 kHz) into the grid, which degrade power quality, cause electromagnetic interference, and affect sensitive equipment. This project proposes a novel active power filter (APF) designed to effectively mitigate supraharmonic emissions, ensuring compliance with grid codes and improving overall power quality.
Objectives
- Analyze the supraharmonic emissions generated by single-phase grid-connected inverters.
- Design and implement an active power filter capable of suppressing emissions in the 2–150 kHz range.
- Enhance grid stability and power quality in renewable energy integration.
- Validate the proposed filter performance through simulations and experimental setup.
Methodology
- Employ a shunt active power filter topology connected to the single-phase inverter system.
- Implement a control algorithm based on harmonic detection and compensation using digital controllers (DSP/FPGA).
- Perform MATLAB/Simulink simulations to test the design.
- Develop a scaled hardware prototype to validate practical feasibility.
Expected Outcomes
- Significant reduction in supraharmonic emissions in single-phase grid-connected inverters.
- Improved compliance with international grid standards.
- Enhanced stability, reduced electromagnetic interference, and improved efficiency of connected systems.
- Demonstrated feasibility of using APF for renewable energy applications.
Applications
- Renewable energy systems (solar PV and battery storage).
- Smart grids and distributed generation.
- Industrial setups requiring high power quality.
- Mitigation of EMI in sensitive electronic environments.
