Sinusoidal pulse width modulation for a photovoltaic-based single-stage inverter.

Area of Science:

• Electrical Engineering
• Renewable Energy Systems
• Power Electronics

Background:

• Traditional inverters contribute to grid overloading and have drawbacks like reliance on non-renewable sources and complex multistage conversions.
• Addressing power shortages in rural areas requires economically feasible and efficient energy solutions.

Purpose of the Study:

• To develop a cost-effective, single-stage renewable energy system for AC power applications.
• To improve upon the limitations of traditional inverters by introducing a novel topology.

Main Methods:

• Implementation of a quasi-impedance source inverter (QZSI) with a single-stage power conversion.
• Utilizing an allowed shoot-through state to minimize components and switching losses.
• Application of sinusoidal pulse width modulation (SPWM) for harmonic reduction.

Main Results:

• MATLAB simulations confirm a significant reduction in total harmonic distortion (THD) compared to existing systems.
• The proposed QZSI demonstrates effective energy utilization from photovoltaic (PV) panels with reduced fluctuations.
• The system's inherent filtering capacity eliminates the need for additional external filters.

Conclusions:

• The proposed QZSI offers an economically viable and efficient solution for rural power supply and backup power.
• The single-stage topology and SPWM control effectively reduce harmonics and enhance system performance.
• This technique uniquely integrates PV energy with improved stability and reduced component count.