A Control Method for Flexible Transfer Converter to Enable Autonomous Control of AC Microgrids

2022 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2022-03-20 DOI:10.1109/APEC43599.2022.9773607

Ronghui An, Jinjun Liu, Z. Song, Zeng Liu, Y. P. Y. Deng

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引用次数: 1

Abstract

For grid-connected or interconnected microgrids, the transition to an autonomous and decentralized architecture was hampered by two perplexing issues: how to guarantee voltage supporting capacity while fully and controllably utilizing local power generation, and how to switch between islanded and grid-connected modes flexibly and efficiently. Through a combination the benefits of interlinking converter and switch, flexible transfer converters (FTCs), positioned at the interfaces between the utility grid and microgrids, are offered as a solution in this study. This paper proposes a control method for FTC and a universal control strategy for distributed generations, which contribute to proper power flow and flexible mode transfer in a communication-free design. They are convenient to control, easy to install based on existing assets, and hence promising in distributed microgrid applications. Also, an FTC for grid-connected microgrid system is analyzed and designed through small-signal modeling. Finally, comprehensive case studies in simulations and experiments are provided to validate its effectiveness.

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一种实现交流微电网自主控制的柔性转换变换器控制方法

对于并网或互联微电网来说，如何在充分可控地利用本地发电的同时保证电压支撑能力，以及如何在孤岛模式和并网模式之间灵活高效地切换，这两个难题阻碍了向自治和分散架构的过渡。通过结合互连转换器和开关的优点，本研究提供了位于公用电网和微电网之间接口的柔性传输转换器(FTCs)作为解决方案。本文提出了一种针对FTC的控制方法和一种针对分布式电源的通用控制策略，这有助于在无通信设计中实现合适的潮流和灵活的模式转换。它们易于控制，易于基于现有资产安装，因此在分布式微电网应用中很有前景。同时，通过小信号建模对并网微电网系统的FTC进行了分析和设计。最后，通过仿真和实验验证了该方法的有效性。

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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2022 IEEE Applied Power Electronics Conference and Exposition (APEC)

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