An Improved Three-Port Resonant PV Converter for Wide Range Operation Based on Adjustable Inductor Coupling Assisted Resonance

IF 6.5 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Electronics Pub Date : 2024-12-11 DOI:10.1109/TPEL.2024.3514823

Ting Qian;Xuefan Yu;Yajing Zhang

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Abstract

This article proposes a simple scheme to improve efficiencies for standalone three-port photovoltaic (PV) systems. Specifically, the new scheme skillfully couples a resonant inductor with an existing filtering inductor of battery management, and thus, achieves an effect that focuses on adjusting the resonant states for isolated power conversion (such as LLC) without affecting other functions or adding extra costs. This leads to a wide voltage gain range between the PV port and the load port, even when only a single-stage resonant power conversion with a narrow switching frequency range is utilized. Also, the adjustability of resonance is achieved simply through phase-shift regulation between the mosfet bridges, which does not add much complexity to overall system control. Additionally, due to the abovementioned advantages, a larger magnetizing inductance for the transformer is allowed in comparison to regular LLC converters. Based on a detailed theoretical analysis, experimental results verify the effectiveness of the proposed concept.

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基于可调电感耦合辅助谐振的宽工作范围改进三端口谐振式光伏变换器

本文提出了一种简单的方案来提高独立三端口光伏（PV）系统的效率。具体而言，新方案巧妙地将谐振电感与现有的电池管理滤波电感耦合在一起，从而实现了在不影响其他功能或增加额外成本的情况下，专注于调整隔离功率转换（如LLC）的谐振状态的效果。这导致PV端口和负载端口之间的电压增益范围很宽，即使仅使用窄开关频率范围的单级谐振功率转换。此外，谐振的可调节性仅通过大多数桥之间的相移调节来实现，这不会给整个系统控制增加太多的复杂性。此外，由于上述优点，与常规LLC变换器相比，允许变压器具有更大的磁化电感。在详细的理论分析基础上，实验结果验证了所提概念的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Power Electronics 工程技术-工程：电子与电气

CiteScore

15.20

自引率

20.90%

发文量

1099

审稿时长

3 months

期刊介绍： The IEEE Transactions on Power Electronics journal covers all issues of widespread or generic interest to engineers who work in the field of power electronics. The Journal editors will enforce standards and a review policy equivalent to the IEEE Transactions, and only papers of high technical quality will be accepted. Papers which treat new and novel device, circuit or system issues which are of generic interest to power electronics engineers are published. Papers which are not within the scope of this Journal will be forwarded to the appropriate IEEE Journal or Transactions editors. Examples of papers which would be more appropriately published in other Journals or Transactions include: 1) Papers describing semiconductor or electron device physics. These papers would be more appropriate for the IEEE Transactions on Electron Devices. 2) Papers describing applications in specific areas: e.g., industry, instrumentation, utility power systems, aerospace, industrial electronics, etc. These papers would be more appropriate for the Transactions of the Society which is concerned with these applications. 3) Papers describing magnetic materials and magnetic device physics. These papers would be more appropriate for the IEEE Transactions on Magnetics. 4) Papers on machine theory. These papers would be more appropriate for the IEEE Transactions on Power Systems. While original papers of significant technical content will comprise the major portion of the Journal, tutorial papers and papers of historical value are also reviewed for publication.