Abstract In this paper, a novel flexible power support control with voltage fluctuation suppression is proposed for islanded hybrid AC/DC microgrid involving distributed energy storage units. The virtual inertia and the interactive relationship between DC bus voltage and AC frequency are introduced into energy storage units (ESs) both in AC and DC subgrids. Therefore, mutual power support from opposite subgrid can be realized and the system inertia can be enhanced while the AC frequency and DC bus voltage are managed. Then, the active power reference of bidirectional interlinking converter (BIC) is modified with the proposed control strategy to achieve proportional power sharing in the whole islanded hybrid AC/DC microgrid. In addition, a controller based on linear active disturbance rejection control (LADRC) is designed according to the BIC model to suppress AC bus voltage fluctuation by using the estimates of disturbances obtained from linear extended state observer (LESO). Finally, stability of the system is analyzed and the results of an RT-LAB-based real-time simulation platform verify the correctness and effectiveness of the proposed control strategy.

中文翻译：

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含分布式储能单元的孤岛式交直流混合微电网电压波动抑制新型柔性电力支持控制

摘要 在本文中，针对包含分布式储能单元的孤岛式交直流混合微电网，提出了一种具有电压波动抑制功能的新型柔性电力支持控制。直流母线电压和交流频率之间的虚拟惯性和交互关系被引入到交流和直流子电网中的储能单元（ES）中。因此，在控制交流频率和直流母线电压的同时，可以实现对端子网的电力相互支持，增强系统惯性。然后，使用所提出的控制策略修改双向互连转换器 (BIC) 的有功功率参考，以在整个孤岛混合 AC/DC 微电网中实现比例功率共享。此外，根据 BIC 模型设计了基于线性自抗扰控制 (LADRC) 的控制器，通过使用从线性扩展状态观测器 (LESO) 获得的扰动估计来抑制交流母线电压波动。最后，对系统的稳定性进行了分析，基于RT-LAB的实时仿真平台的结果验证了所提出控制策略的正确性和有效性。