Enhanced High-Gain Y-Source DC-DC Converter with Switched-Inductor-Capacitor Design for Improved Efficiency and Reliability in Grid-Integrated Solar Power Systems

Efficient and reliable high-gain DC–DC converters are critical in photovoltaic (PV) grid-connected systems to bridge the gap between low-output PV voltages and the high input voltages required by the grid. This paper presents a novel high-gain DC–DC converter that integrates a Y-source network with a hybrid switched-inductor-capacitor (SLC) boost module, achieving superior voltage amplification at reduced duty cycles. The proposed converter architecture can achieve a voltage gain of up to ۱۶ times the input voltage with only an ۱۸% duty cycle, thereby minimizing conduction and switching losses and extending the converter’s operational lifespan.The design enables continuous current draw from the source while maintaining reduced stress on components, distinguishing it from conventional converters. A detailed steady-state analysis and design methodology for the inductive and capacitive elements are provided, with final component values optimized for performance and reliability. MATLAB/Simulink simulations validate the theoretical analysis, demonstrating an efficiency of ۸۸.۸% at ۱۰۰ W output power and a mean time to failure (MTTF) of ۱۰۴.۱۴ kHr, representing substantial improvements over existing topologies.Experimental validation on a ۱۰۰ W prototype confirms the converter’s reliability and performance, achieving a stable output voltage of ۱۹۲ V from a ۱۲ V input. Comparative analysis with traditional Y-source and SLC-based converters highlights the proposed topology’s advantages in efficiency, voltage gain, and reduced component count, making it a promising candidate for PV grid applications.

کلیدواژه ها:

High-gain DC-DC converter ، Y-Source Network ، Switched Inductor-Capacitor ، photovoltaic systems ، Grid-connected applications ، Voltage amplification ، reliability analysis ، Energy efficiency