Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids
For a DC microgrid with a traditional droop control strategy, achieving accurate power sharing among power converters is challenging due to mismatched line resistance. In a multi-bus DC microgrid system, changes in the power flow can further lead to variation in the equivalent line resistance of eac...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/9/2183 |
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| author | Xiangyu Qin Zhengyu Lin Wei Jiang Hazel Lee |
| author_facet | Xiangyu Qin Zhengyu Lin Wei Jiang Hazel Lee |
| author_sort | Xiangyu Qin |
| collection | DOAJ |
| description | For a DC microgrid with a traditional droop control strategy, achieving accurate power sharing among power converters is challenging due to mismatched line resistance. In a multi-bus DC microgrid system, changes in the power flow can further lead to variation in the equivalent line resistance of each power converter. To improve power sharing accuracy, an adaptive line resistance estimation method is proposed in this paper, which can accurately estimate line resistance without additional hardware. The estimated line resistances are then used to compensate the droop coefficient of each power converter to ensure accurate power sharing between power converters. Simulation and experimental results are presented to demonstrate the effectiveness of the proposed method for single bus, multi-bus, and ring-bus DC microgrid systems. |
| format | Article |
| id | doaj-art-4ef5ee8b9e924b00bc9478c856eff8ff |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-4ef5ee8b9e924b00bc9478c856eff8ff2025-08-20T03:52:57ZengMDPI AGEnergies1996-10732025-04-01189218310.3390/en18092183Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC MicrogridsXiangyu Qin0Zhengyu Lin1Wei Jiang2Hazel Lee3College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaWolfson School, Loughborough University, Loughborough LE11 3TU, UKCollege of Intelligent Manufacturing, Yangzhou Polytechnic Institute; Yangzhou 225127, ChinaFrazer-Nash Consultancy; Leatherhead KT22 7LH, UKFor a DC microgrid with a traditional droop control strategy, achieving accurate power sharing among power converters is challenging due to mismatched line resistance. In a multi-bus DC microgrid system, changes in the power flow can further lead to variation in the equivalent line resistance of each power converter. To improve power sharing accuracy, an adaptive line resistance estimation method is proposed in this paper, which can accurately estimate line resistance without additional hardware. The estimated line resistances are then used to compensate the droop coefficient of each power converter to ensure accurate power sharing between power converters. Simulation and experimental results are presented to demonstrate the effectiveness of the proposed method for single bus, multi-bus, and ring-bus DC microgrid systems.https://www.mdpi.com/1996-1073/18/9/2183droop controlpower sharingline resistanceDC microgrid |
| spellingShingle | Xiangyu Qin Zhengyu Lin Wei Jiang Hazel Lee Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids Energies droop control power sharing line resistance DC microgrid |
| title | Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids |
| title_full | Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids |
| title_fullStr | Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids |
| title_full_unstemmed | Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids |
| title_short | Adaptive Line Resistance Estimation and Compensation for Accurate Power Sharing of Droop-Controlled DC Microgrids |
| title_sort | adaptive line resistance estimation and compensation for accurate power sharing of droop controlled dc microgrids |
| topic | droop control power sharing line resistance DC microgrid |
| url | https://www.mdpi.com/1996-1073/18/9/2183 |
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