Tags:Multilevel inverter, Quadrupole Boost, Renewable energy, Self-Balancing and Total Harmonic Distortion (THD)
Abstract:
Low-voltage renewable energy sources necessitate inverters with high boosting capability for their transformerless integration with the grid. Switched capacitor multilevel inverters have emerged as a promising solution for this, providing high-quality ac voltage with reduced loss. Newer topologies and control algorithms are evolving to ease capacitor voltage balancing, reduce component count, and reduce voltage stress across the switches. This paper proposes a novel topology that uses only 10 switches, 3 diodes, 3 capacitors, and a single source to produce 9-level stair-case ac voltage with a voltage gain of 4. The generated switching signal controls the switches in a way that charges and discharges the capacitors in a balanced way without requiring any additional sensors or auxiliary circuitry. Total harmonic distortion of the generated output voltage is 8.98%, and aiding a filter, it improves to 0.39%. The performance of the proposed topology has been evaluated through extensive simulation on the MATLAB/Simulink platform. Dynamic load variation has been tested for its applicability in a real-life scenario. The superiority of the proposed has been analyzed through comparison with other existing topologies. This topology has the potential for a streamlined solution for renewable energy applications and other areas where high output voltage and low total harmonic distortion are essential. Thus, aligning its goals with the broader framework of sustainable development, particularly in the area of clean energy.
A Reduced Component Nine-Level Inverter with Quadruple Boosting Capability: Design and Simulation