The flexible interconnection system (FIS) in distribution transformer areas can improve the local consumption capacity of high penetration rate distributed photovoltaics and solve the problem of the high loading rate of distribution transformers. This paper presents an optimized grid‐forming control strategy for the FIS in distribution transformer areas. First, the DC side impedance small signal model of the FIS is built, and the reason for the stability difference of the FIS is analyzed when the active power flows in different directions. An optimized control structure is then presented based on the conventional grid‐forming control strategy. The theoretical analysis shows that the optimized grid‐forming control strategy can improve the stability of the FIS. Finally, the controller hardware‐in‐the‐loop experiments based on RT‐LAB confirm the effectiveness of the presented optimized control strategy. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

中文翻译：

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配变区柔性联网系统优化并网控制策略

配变区域柔性互联系统（FIS）可以提高高渗透率分布式光伏的就地消纳能力，解决配变高负荷率问题。本文提出了一种针对配变区域 FIS 的优化并网控制策略。首先建立FIS直流侧阻抗小信号模型，分析有功功率流向不同方向时FIS稳定性差异的原因。然后基于传统的网格形成控制策略提出了优化的控制结构。理论分析表明，优化的网格形成控制策略可以提高FIS的稳定性。最后，基于RT-LAB的控制器硬件在环实验证实了所提出的优化控制策略的有效性。 © 2024 日本电气工程师协会和 Wiley periodicals LLC。