一种改善孤岛微电网电力共享和循环电流共振的新型自适应电压积分控制

2022 International Conference on Power Energy Systems and Applications (ICoPESA) Pub Date : 2022-02-25 DOI:10.1109/ICoPESA54515.2022.9754449

Yufei Li, Fei Wang, Xiayun Feng

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引用次数: 0

摘要

与传统的不间断电源(UPS)系统不同，孤岛微电网由于电源变流器和电力负荷的不均匀分布所决定的非结构化阻抗网络，提高功率共享和减少循环电流谐振具有重要意义。虚拟阻抗控制作为一种改进的下垂控制，被广泛用于解决这些问题。但是，随着虚阻抗的增大，负载的压降会加剧。针对虚拟阻抗控制的不足，提出了一种新的自适应电压积分控制方法，通过关键参数解决电压降问题，增强功率共享的自主性。通过阻抗分析，将所提出的自适应控制与虚拟阻抗控制在循环电流谐振方面进行了比较。仿真和实验验证了该方法的正确性和有效性。

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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A Novel Adaptive Voltage Integral Control for Improving Power Sharing and Circulating-Current Resonance in Islanded Micro-grid

Different with conventional uninterrupted power supply (UPS) system, improving power sharing and reducing circulating-current resonance are important to islanded micro-grid because of the unstructured impedance networks decided by the uneven distribution of power converters and electrical loads. Virtual impedance control, as an improved droop control, is widely used to solve these problems. However, voltage drop of the load will be aggravated with increase of the virtual impedance. This paper aims to reveal disadvantages of the virtual impedance control and a novel adaptive voltage integral control is proposed to solve the voltage drop problem and enhance power sharing autonomously through key parameters. The proposed adaptive control is compared with the virtual impedance control in aspect of circulating-current resonance by impedance analysis. The correctness and effectiveness of the proposed method are verified by simulations and experiments.

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来源期刊

2022 International Conference on Power Energy Systems and Applications (ICoPESA)

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