Carrier Phase Synchronization Based on Circulating Current Identification for Distributed Inverters

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

IEEE Transactions on Power Electronics Pub Date : 2025-03-11 DOI:10.1109/TPEL.2025.3550705

Jiakang Zhang;Dehong Zhou;Jianxiao Zou;Xin Liu;Hong Zhang;Zewei Shen

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引用次数: 0

Abstract

Distributed parallel inverters are a promising solution for large power systems due to their flexibility and reliability. However, the distributed control mode often causes carrier phase desynchronization among the control units, leading to adverse effects on high-frequency harmonics and power loss. To address this issue, this article proposes a carrier phase synchronization (CPS) method for distributed parallel inverters, leveraging circulating current identification. In the proposed scheme, circulating currents in parallel inverters directly influence high-frequency harmonics and carry carrier phase information. The peak amplitude of these currents is used to identify the CPS point and adaptively adjust the carrier phase difference. The proposed strategy leverages existing circulating currents to achieve CPS in parallel inverters, eliminating the need for additional synchronization hardware. Consequently, this solution not only reduces system costs and size but also enables CPS-based multifunctionality, such as power quality optimization and common mode reduction. Finally, both simulation and experimental results are provided to validate the effectiveness of the proposed CPS method and the associated analysis.

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基于循环电流辨识的分布式逆变器载波相位同步

分布式并联逆变器由于其灵活性和可靠性，在大型电力系统中是一种很有前途的解决方案。然而，分布式控制方式往往会导致控制单元之间的载波相位失同步，从而对高频谐波和功率损耗产生不利影响。为了解决这个问题，本文提出了一种利用环流识别的分布式并联逆变器载波相位同步（CPS）方法。在该方案中，并联逆变器中的循环电流直接影响高频谐波并携带载波相位信息。利用这些电流的峰值幅度来识别CPS点并自适应调整载波相位差。所提出的策略利用现有的循环电流在并联逆变器中实现CPS，从而消除了对额外同步硬件的需求。因此，该解决方案不仅降低了系统成本和尺寸，而且还实现了基于cps的多功能，如电能质量优化和减少共模。最后，给出了仿真和实验结果，验证了所提出的CPS方法和相关分析的有效性。

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.