A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems
In the realm of isolated direct-current microgrids with varying distributed energy storage unit capacities, a new energy equalization strategy is proposed. This method involves an innovative approach that integrates an improved state-of-charge equalization control integrated with a sigmoid function...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061524006215 |
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| author | Yuanxi Liu Ling Yang Maohua Wei |
| author_facet | Yuanxi Liu Ling Yang Maohua Wei |
| author_sort | Yuanxi Liu |
| collection | DOAJ |
| description | In the realm of isolated direct-current microgrids with varying distributed energy storage unit capacities, a new energy equalization strategy is proposed. This method involves an innovative approach that integrates an improved state-of-charge equalization control integrated with a sigmoid function to adaptively adjust the droop coefficient, aiming to accelerate the state-of-charge equalization rate. Furthermore, a virtual voltage drop equalization control is designed to dynamically adjust the output current of each distributed energy storage unit through a simple proportional–integral controller. This eliminates the influence of line impedance on accurate current distribution, improving overall accuracy. Additionally, a dynamic consistency algorithm is employed to gather average information about the distributed energy storage system, reducing communication line pressure as local nodes only exchange information with neighboring nodes. Integrating the aforementioned modules, the strategy proposed in this paper achieves rapid state-of-charge equalization, precise distribution of output current, and stable maintenance of the bus voltage. Finally, rigorous analysis of experimental results under various operating conditions verifies the feasibility and effectiveness of this control strategy by using the RT-LAB. |
| format | Article |
| id | doaj-art-b5eb5039bc9744e4ad4242b34cdc05b9 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-b5eb5039bc9744e4ad4242b34cdc05b92025-01-19T06:23:54ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-03-01164110398A novel droop coefficient to realize rapid SOC balance for distributed energy storage systemsYuanxi Liu0Ling Yang1Maohua Wei2School of Automation, Guangdong University of Technology, Guangdong, ChinaCorresponding author.; School of Automation, Guangdong University of Technology, Guangdong, ChinaSchool of Automation, Guangdong University of Technology, Guangdong, ChinaIn the realm of isolated direct-current microgrids with varying distributed energy storage unit capacities, a new energy equalization strategy is proposed. This method involves an innovative approach that integrates an improved state-of-charge equalization control integrated with a sigmoid function to adaptively adjust the droop coefficient, aiming to accelerate the state-of-charge equalization rate. Furthermore, a virtual voltage drop equalization control is designed to dynamically adjust the output current of each distributed energy storage unit through a simple proportional–integral controller. This eliminates the influence of line impedance on accurate current distribution, improving overall accuracy. Additionally, a dynamic consistency algorithm is employed to gather average information about the distributed energy storage system, reducing communication line pressure as local nodes only exchange information with neighboring nodes. Integrating the aforementioned modules, the strategy proposed in this paper achieves rapid state-of-charge equalization, precise distribution of output current, and stable maintenance of the bus voltage. Finally, rigorous analysis of experimental results under various operating conditions verifies the feasibility and effectiveness of this control strategy by using the RT-LAB.http://www.sciencedirect.com/science/article/pii/S0142061524006215DC microgridDistributed energy storage systemState of chargeVoltage drop equalizationVoltage compensation |
| spellingShingle | Yuanxi Liu Ling Yang Maohua Wei A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems International Journal of Electrical Power & Energy Systems DC microgrid Distributed energy storage system State of charge Voltage drop equalization Voltage compensation |
| title | A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems |
| title_full | A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems |
| title_fullStr | A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems |
| title_full_unstemmed | A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems |
| title_short | A novel droop coefficient to realize rapid SOC balance for distributed energy storage systems |
| title_sort | novel droop coefficient to realize rapid soc balance for distributed energy storage systems |
| topic | DC microgrid Distributed energy storage system State of charge Voltage drop equalization Voltage compensation |
| url | http://www.sciencedirect.com/science/article/pii/S0142061524006215 |
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