Scholarlink

This paper presents a novel Dual Active Bridge (DAB) micro-inverter, and an innovative control strategy has been proposed to ensure stability under differing operation conditions. The controller leverages a Proportional Integral (PI) mechanism and a nominal phase-shift feed-forward approach, enabling accurate output current control and near-perfect synchronisation with the grid voltage. Further control is exerted through the modulation of the phase-shift index k. This effective control strategy significantly reduces reactive power and conduction losses, enhancing the overall power efficiency of the DAB micro-inverter. Effectiveness is validated through MATLAB simulations. A Proportional-Integral (PI) controller achieves precise output current control, yielding an almost perfect sinusoidal output current and a satisfactory Total Harmonic Distortion (THD) of 0.2. The controller exhibits robustness against variations in photovoltaic (PV) voltage, load, and grid voltage. The study offers a promising solution for improving DAB microinverters’ power efficiency, providing a basis for future advancements.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Novel Control Strategy Based on DAB Microinverter

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Zixing Chi,
  • Hao Xu,
  • Tianyu Liu

摘要

This paper presents a novel Dual Active Bridge (DAB) micro-inverter, and an innovative control strategy has been proposed to ensure stability under differing operation conditions. The controller leverages a Proportional Integral (PI) mechanism and a nominal phase-shift feed-forward approach, enabling accurate output current control and near-perfect synchronisation with the grid voltage. Further control is exerted through the modulation of the phase-shift index k. This effective control strategy significantly reduces reactive power and conduction losses, enhancing the overall power efficiency of the DAB micro-inverter. Effectiveness is validated through MATLAB simulations. A Proportional-Integral (PI) controller achieves precise output current control, yielding an almost perfect sinusoidal output current and a satisfactory Total Harmonic Distortion (THD) of 0.2. The controller exhibits robustness against variations in photovoltaic (PV) voltage, load, and grid voltage. The study offers a promising solution for improving DAB microinverters’ power efficiency, providing a basis for future advancements.