A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints
Due to the limited inertial support capability and insufficient dispatchable generation resources (such as energy storage and backup units), microgrids struggle to quickly balance power during unexpected unplanned islanding events, leading to severe frequency fluctuations that threaten system stabil...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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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/S0142061525004806 |
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| author | Jie Liu Xiangtao Zhuan Lei Shang Shi Su Qingyang Xie |
| author_facet | Jie Liu Xiangtao Zhuan Lei Shang Shi Su Qingyang Xie |
| author_sort | Jie Liu |
| collection | DOAJ |
| description | Due to the limited inertial support capability and insufficient dispatchable generation resources (such as energy storage and backup units), microgrids struggle to quickly balance power during unexpected unplanned islanding events, leading to severe frequency fluctuations that threaten system stability. To address the disturbances caused by sudden unplanned islanding during grid-connected operation, this paper proposes a load-shedding preplan (LSPP) strategy based on dynamic frequency security constraints. This strategy is immediately executed upon an islanding event, implementing day-ahead load-shedding preplan to ensure frequency stability and secure operation through only once shedding action and the primary frequency response of dispatchable resources. The optimization model of the load-shedding preplan strategy aims to minimize both the amount of load shed and the associated economic losses, while ensuring that frequency deviations remain within critical limits. Simulation results demonstrate that the proposed strategy can rapidly stabilize system frequency in the event of unplanned islanding, effectively reducing load shedding and enhancing both system security and economic efficiency. |
| format | Article |
| id | doaj-art-af40452d69d245d591c58a85e1a149dc |
| institution | DOAJ |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-af40452d69d245d591c58a85e1a149dc2025-08-20T03:03:46ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-09-0117011093210.1016/j.ijepes.2025.110932A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraintsJie Liu0Xiangtao Zhuan1Lei Shang2Shi Su3Qingyang Xie4School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaSchool of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China; Corresponding author.School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaYunnan Electric Power Research Institute, Yunnan 650217, ChinaYunnan Electric Power Research Institute, Yunnan 650217, ChinaDue to the limited inertial support capability and insufficient dispatchable generation resources (such as energy storage and backup units), microgrids struggle to quickly balance power during unexpected unplanned islanding events, leading to severe frequency fluctuations that threaten system stability. To address the disturbances caused by sudden unplanned islanding during grid-connected operation, this paper proposes a load-shedding preplan (LSPP) strategy based on dynamic frequency security constraints. This strategy is immediately executed upon an islanding event, implementing day-ahead load-shedding preplan to ensure frequency stability and secure operation through only once shedding action and the primary frequency response of dispatchable resources. The optimization model of the load-shedding preplan strategy aims to minimize both the amount of load shed and the associated economic losses, while ensuring that frequency deviations remain within critical limits. Simulation results demonstrate that the proposed strategy can rapidly stabilize system frequency in the event of unplanned islanding, effectively reducing load shedding and enhancing both system security and economic efficiency.http://www.sciencedirect.com/science/article/pii/S0142061525004806Microgrid schedulingUnplanned islandingDynamic frequency security constraintLoad-shedding preplan strategySystem stability |
| spellingShingle | Jie Liu Xiangtao Zhuan Lei Shang Shi Su Qingyang Xie A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints International Journal of Electrical Power & Energy Systems Microgrid scheduling Unplanned islanding Dynamic frequency security constraint Load-shedding preplan strategy System stability |
| title | A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| title_full | A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| title_fullStr | A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| title_full_unstemmed | A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| title_short | A load-shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| title_sort | load shedding preplan strategy for unplanned microgrid islanding considering frequency security constraints |
| topic | Microgrid scheduling Unplanned islanding Dynamic frequency security constraint Load-shedding preplan strategy System stability |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525004806 |
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