FPGA techniques based new hybrid modulation strategies for voltage source inverters

Area of Science:

• Electrical Engineering
• Power Electronics
• Control Systems

Background:

• Single-phase voltage source inverters are crucial in power systems.
• Existing modulation strategies often face trade-offs between efficiency and harmonic performance.
• Minimizing total harmonic distortion (THD) and switching losses is essential for improved power quality.

Purpose of the Study:

• To develop and validate three novel hybrid modulation strategies for single-phase voltage source inverters.
• To optimize inverter performance by minimizing total harmonic distortion (THD), lower-order harmonics, switching losses, and heat losses.
• To enhance power quality and reduce harmonic pollution in power systems.

Main Methods:

• Formulation of hybrid modulation strategies combining fundamental switching and carrier-based pulse width modulation (PWM).
• Optimization of specific performance criteria including THD, harmonic content, and power losses.
• Simulation using MATLAB and hardware implementation on a Xilinx Spartan FPGA processor.

Main Results:

• Demonstrated reduction in total harmonic distortion (THD) and lower-order harmonics.
• Achieved minimization of switching and heat losses.
• Validated improved harmonic profiles and enhanced power quality for a target fundamental output voltage.

Conclusions:

• The proposed hybrid modulation strategies are effective for single-phase voltage source inverters.
• The methods successfully reduce harmonic pollution and improve power quality.
• Simulation and experimental results confirm the feasibility and effectiveness of the developed strategies.