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<p>This paper presents a modified hybrid DC-DC boost converter topology with enhanced voltage gain capability for renewable energy applications, particularly suited for photovoltaic and micro-hydro power integration with high-voltage direct current (HVDC) transmission systems. The proposed topology incorporates a coupled inductor, switched capacitor, and voltage multiplier cell to achieve a significantly higher voltage conversion ratio compared to conventional boost converters while maintaining reduced voltage stress across the power semiconductor devices. A comprehensive steady-state analysis is performed under continuous conduction mode (CCM), and the voltage gain, current ripple, and efficiency expressions are derived analytically. Furthermore, a hybrid grey wolf optimizer–differential evolution (GWO-DE) algorithm is developed for the optimization of converter parameters, and a gradient-boosting regression surrogate is trained for rapid design-space exploration. The benefit of the GWO-DE optimization is quantified against both a classical analytical design and an exhaustive grid search, yielding a 2.7&#xa0;percentage-point efficiency advantage over the analytical design and a 22-fold reduction in design wall-clock time relative to the grid search. The proposed converter achieves a voltage gain of 12.5 at a duty cycle of 0.65, with a peak efficiency of 96.8%. Extensive simulation results obtained in MATLAB/Simulink validate the theoretical analysis and confirm the superior performance of the proposed topology in comparison with existing high-gain DC-DC converter configurations reported in the literature.</p>

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Modified hybrid DC-DC boost converter with high voltage gain for renewable energy integration using GWO-DE parameter optimization

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月26日

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  • Habung Tado,
  • Mrinal Kanti Rajak,
  • Rajen Pudur,
  • Ralli Sangno,
  • A. Lavanya

摘要

This paper presents a modified hybrid DC-DC boost converter topology with enhanced voltage gain capability for renewable energy applications, particularly suited for photovoltaic and micro-hydro power integration with high-voltage direct current (HVDC) transmission systems. The proposed topology incorporates a coupled inductor, switched capacitor, and voltage multiplier cell to achieve a significantly higher voltage conversion ratio compared to conventional boost converters while maintaining reduced voltage stress across the power semiconductor devices. A comprehensive steady-state analysis is performed under continuous conduction mode (CCM), and the voltage gain, current ripple, and efficiency expressions are derived analytically. Furthermore, a hybrid grey wolf optimizer–differential evolution (GWO-DE) algorithm is developed for the optimization of converter parameters, and a gradient-boosting regression surrogate is trained for rapid design-space exploration. The benefit of the GWO-DE optimization is quantified against both a classical analytical design and an exhaustive grid search, yielding a 2.7 percentage-point efficiency advantage over the analytical design and a 22-fold reduction in design wall-clock time relative to the grid search. The proposed converter achieves a voltage gain of 12.5 at a duty cycle of 0.65, with a peak efficiency of 96.8%. Extensive simulation results obtained in MATLAB/Simulink validate the theoretical analysis and confirm the superior performance of the proposed topology in comparison with existing high-gain DC-DC converter configurations reported in the literature.