Power electronicconverters have attracted significant attention in renewable energy generation and distribution systems. However, some crucial techniques, such as power quality and stability enhancement of converters, still need to be further improved. In this study, an improved reduced-order generalised integrator (ROGI), which can achieve decoupling, is proposed. It can reduce the -axis and -axis current coupling and improve the dynamic response performance, maintaining the advantage of the conventional ROGI (e.g. less computational burden). Besides, delay compensation is added to the proposed decoupled ROGI, which improves the stability of the current loop and can be effectively applied for the current/voltage harmonic suppression in the distributed system. Also, the procedures of parameter tuning and optimal delay compensation angle computation are given. Finally, the harmonic current compensation of the three-phase grid-connected converter is taken as an example for simulation analysis, and the experimental results verify the reasonability and effectiveness of the proposed method.

中文翻译：

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具有延迟补偿的增强型降阶广义积分器，用于配电系统的谐波抑制

电力电子转换器在可再生能源发电和配电系统中引起了极大的关注。但是，一些关键技术，例如电源质量和转换器的稳定性增强，仍需要进一步改进。在这项研究中，提出了一种可以实现去耦的改进的降阶广义积分器（ROGI）。它可以减少 轴和 轴电流耦合并改善了动态响应性能，保持了传统ROGI的优势（例如，较少的计算负担）。此外，在提出的去耦ROGI上增加了延迟补偿，提高了电流环路的稳定性，可有效地应用于分布式系统中的电流/电压谐波抑制。此外，给出了参数调整和最佳延迟补偿角计算的过程。最后，以三相并网变换器的谐波电流补偿为例进行仿真分析，实验结果验证了该方法的合理性和有效性。