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<p>This work presents a significant advancement in the integration of renewable energy sources through the development of a multi-source energy system featuring a novel Coupled Inductor Quadratic Zeta-Luo (CIQZL) converter and a bidirectional SEPIC-Luo converter. The CIQZL converter, enhanced by a Proportional-Integral (PI) controller optimized using the Egret Swarm Optimization Algorithm (ESOA), plays a pivotal role in improving photovoltaic (PV) voltage levels and ensuring efficient energy flow between the DC bus and the storage system. Additionally, a Doubly Fed Induction Generator (DFIG)-based Wind Energy Conversion System (WECS) with a Pulse Width Modulation (PWM) rectifier enables consistent DC output from variable AC wind input, supporting uninterrupted grid connectivity. Simulations conducted in MATLAB/Simulink confirm that the proposed system significantly enhances power quality, voltage regulation, and energy management. Achieving a high efficiency of 97.95%, reduced harmonic distortion and increased reliability, this integrated approach demonstrates strong potential for scalable, stable and sustainable renewable energy deployment.</p>

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Multi-Source Renewable Energy System with Coupled Inductor Quadratic Zeta-Luo Converter and ESOA-PI Controller for Efficient Power Conversion and Grid Integration

  • 期刊论文

  • 发表日期：

    2025年11月28日

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  • P. Gajalakshmi,
  • R. Elavarasi,
  • S. Angalaeswari,
  • G. Nithya

摘要

This work presents a significant advancement in the integration of renewable energy sources through the development of a multi-source energy system featuring a novel Coupled Inductor Quadratic Zeta-Luo (CIQZL) converter and a bidirectional SEPIC-Luo converter. The CIQZL converter, enhanced by a Proportional-Integral (PI) controller optimized using the Egret Swarm Optimization Algorithm (ESOA), plays a pivotal role in improving photovoltaic (PV) voltage levels and ensuring efficient energy flow between the DC bus and the storage system. Additionally, a Doubly Fed Induction Generator (DFIG)-based Wind Energy Conversion System (WECS) with a Pulse Width Modulation (PWM) rectifier enables consistent DC output from variable AC wind input, supporting uninterrupted grid connectivity. Simulations conducted in MATLAB/Simulink confirm that the proposed system significantly enhances power quality, voltage regulation, and energy management. Achieving a high efficiency of 97.95%, reduced harmonic distortion and increased reliability, this integrated approach demonstrates strong potential for scalable, stable and sustainable renewable energy deployment.