Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station
The flexible DC interconnection technology can effectively improve the power quality of the power grid, and enhance the reliability of power supply, thus improving the level of new energy consumption. In a flexible DC interconnection system with master-slave control, sudden load increase and short-t...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2023-05-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/220712988 |
| _version_ | 1827941110118350848 |
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| author | WANG Chuyang ZHANG Qiuyue ZHANG Li |
| author_facet | WANG Chuyang ZHANG Qiuyue ZHANG Li |
| author_sort | WANG Chuyang |
| collection | DOAJ |
| description | The flexible DC interconnection technology can effectively improve the power quality of the power grid, and enhance the reliability of power supply, thus improving the level of new energy consumption. In a flexible DC interconnection system with master-slave control, sudden load increase and short-term fluctuation in new energy output are likely to cause the actual power of the master station to exceed its capacity. It is difficult to timely suppress power fluctuation through traditional power limiting or scheduling methods, which leads to abnormal DC side voltage and threatens the stable operation of the power system. Therefore, a master-slave control strategy that takes into account the capacity margin of the master station is proposed. The strategy optimizes the operation mechanism of the master station and incorporates the capacity margin factor into the operation mode of the master station to adjust the voltage of the master station. The loop structure and variable definition of the loop are added. A closed suppression loop based on overcapacity power is added, which ensures the continuous regulation ability of the main station to the DC bus voltage. Since the master station needs the coordinated operation among the slave stations when balancing the system power, a power support mechanism among the slave stations is introduced based on the traditional operation mode and original scheduling of the slave stations, and a system under the constraints of system power balance and other constraints is established. The multi-objective optimization model with the smallest system economic loss and the smallest source-storage equipment loss is established, and the non-dominated sorting genetic algorithm-Ⅱ (NSGA-Ⅱ) is used to solve the optimization model quickly. Finally, it is verified by simulation that the proposed strategy can effectively prevent the overcapacity of the master station and ensure the stable and efficient operation of the flexible DC interconnection system. |
| first_indexed | 2024-03-13T09:31:21Z |
| format | Article |
| id | doaj.art-504dc6e6f0224ccabbfbfe18f0985e7a |
| institution | Directory Open Access Journal |
| issn | 2096-3203 |
| language | zho |
| last_indexed | 2024-03-13T09:31:21Z |
| publishDate | 2023-05-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj.art-504dc6e6f0224ccabbfbfe18f0985e7a2023-05-26T00:26:41ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032023-05-01423819110.12158/j.2096-3203.2023.03.010220712988Master-slave control strategy of flexible DC interconnection system considering capacity margin of master stationWANG Chuyang0ZHANG Qiuyue1ZHANG Li2College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, ChinaCollege of Energy and Electrical Engineering, Hohai University, Nanjing 211100, ChinaCollege of Energy and Electrical Engineering, Hohai University, Nanjing 211100, ChinaThe flexible DC interconnection technology can effectively improve the power quality of the power grid, and enhance the reliability of power supply, thus improving the level of new energy consumption. In a flexible DC interconnection system with master-slave control, sudden load increase and short-term fluctuation in new energy output are likely to cause the actual power of the master station to exceed its capacity. It is difficult to timely suppress power fluctuation through traditional power limiting or scheduling methods, which leads to abnormal DC side voltage and threatens the stable operation of the power system. Therefore, a master-slave control strategy that takes into account the capacity margin of the master station is proposed. The strategy optimizes the operation mechanism of the master station and incorporates the capacity margin factor into the operation mode of the master station to adjust the voltage of the master station. The loop structure and variable definition of the loop are added. A closed suppression loop based on overcapacity power is added, which ensures the continuous regulation ability of the main station to the DC bus voltage. Since the master station needs the coordinated operation among the slave stations when balancing the system power, a power support mechanism among the slave stations is introduced based on the traditional operation mode and original scheduling of the slave stations, and a system under the constraints of system power balance and other constraints is established. The multi-objective optimization model with the smallest system economic loss and the smallest source-storage equipment loss is established, and the non-dominated sorting genetic algorithm-Ⅱ (NSGA-Ⅱ) is used to solve the optimization model quickly. Finally, it is verified by simulation that the proposed strategy can effectively prevent the overcapacity of the master station and ensure the stable and efficient operation of the flexible DC interconnection system.https://www.epet-info.com/dlgcjsen/article/abstract/220712988flexible dc interconnection systemmaster-slave controlpower capacity marginslave cooperative controlpower supportoptimal power flow |
| spellingShingle | WANG Chuyang ZHANG Qiuyue ZHANG Li Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station 电力工程技术 flexible dc interconnection system master-slave control power capacity margin slave cooperative control power support optimal power flow |
| title | Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station |
| title_full | Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station |
| title_fullStr | Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station |
| title_full_unstemmed | Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station |
| title_short | Master-slave control strategy of flexible DC interconnection system considering capacity margin of master station |
| title_sort | master slave control strategy of flexible dc interconnection system considering capacity margin of master station |
| topic | flexible dc interconnection system master-slave control power capacity margin slave cooperative control power support optimal power flow |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/220712988 |
| work_keys_str_mv | AT wangchuyang masterslavecontrolstrategyofflexibledcinterconnectionsystemconsideringcapacitymarginofmasterstation AT zhangqiuyue masterslavecontrolstrategyofflexibledcinterconnectionsystemconsideringcapacitymarginofmasterstation AT zhangli masterslavecontrolstrategyofflexibledcinterconnectionsystemconsideringcapacitymarginofmasterstation |