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考虑线路电阻不匹配时优化低压直流微电网中的功率分配精度

Optimizing power sharing accuracy in low voltage DC microgrids considering mismatched line resistances.

作者信息

Hamad Samir A, Ghalib Mohamed Ali, Elmorshedy Mahmoud F, Almutairi Sulaiman Z, Alqahtani Mohammed H, Ali Hazem Hassan

机构信息

Process Control Technology Department, Faculty of Technology and Education, Beni-Suef University, Beni-Suef, Egypt.

Renewable Energy Lab., College of Engineering, Prince Sultan University, Riyadh, Saudi Arabia.

出版信息

Sci Rep. 2024 Dec 4;14(1):30195. doi: 10.1038/s41598-024-74682-0.

DOI:10.1038/s41598-024-74682-0
PMID:39632871
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11618382/
Abstract

The main difficulties facing the operation of parallel converters in DC microgrids (DCMGs) are load sharing, circulation current, and bus voltage regulation. A droop controller is commonly used to control current sharing among parallel DC-DC converters due to its simplicity. However, the values of droop parameters impact both bus voltage regulation and the error in current sharing among converters. This study introduces an adaptive and straightforward droop control mechanism designed to estimate droop parameters. The algorithm aims to enhance both bus voltage regulation and load sharing performance within DCMGs. Additionally, to mitigate bus voltage deviation in DCMGs, the second loop shifts the droop lines to maintain voltage regulation at rated values. The proposed method has been compared with the conventional droop controller under variable input voltage and load resistance conditions. Simulation results demonstrate that the presented method outperforms the traditional control approach, achieving superior performance.

摘要

直流微电网（DCMG）中并联变换器运行面临的主要困难是负载分担、环流和母线电压调节。由于其简单性，下垂控制器通常用于控制并联DC-DC变换器之间的电流共享。然而，下垂参数的值会影响母线电压调节和变换器之间电流共享的误差。本研究介绍了一种旨在估计下垂参数的自适应且简单的下垂控制机制。该算法旨在提高直流微电网中的母线电压调节和负载分担性能。此外，为了减轻直流微电网中的母线电压偏差，第二个环路会移动下垂线以将电压调节维持在额定值。在可变输入电压和负载电阻条件下，已将所提出的方法与传统下垂控制器进行了比较。仿真结果表明，所提出的方法优于传统控制方法，具有卓越的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/f9a6cb13ea97/41598_2024_74682_Fig18_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/a5451140bb9b/41598_2024_74682_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/d5848898be40/41598_2024_74682_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/c324112f8495/41598_2024_74682_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/d090a90bcddc/41598_2024_74682_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/f12141a80af9/41598_2024_74682_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/2c7597ea4069/41598_2024_74682_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/5f7c873b6e5b/41598_2024_74682_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/23b661eb69db/41598_2024_74682_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/925012eb9514/41598_2024_74682_Fig14_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/14d8a01ac627/41598_2024_74682_Fig15_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/464815ab825f/41598_2024_74682_Fig16_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cfa/11618382/f9a6cb13ea97/41598_2024_74682_Fig18_HTML.jpg

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本文引用的文献

1
A comprehensive review of DC microgrid in market segments and control technique.直流微电网在市场细分与控制技术方面的全面综述。
Heliyon. 2022 Nov 17;8(11):e11694. doi: 10.1016/j.heliyon.2022.e11694. eCollection 2022 Nov.