Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary
In order to analyze the impact of power flow transfer of the DC grid on safe operation, this paper studies the calculation methods of power flow transfer of the DC grid under master–slave control and droop control, including the calculation of power flow transfer in line disconnection situation and...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472202577X |
| _version_ | 1797781920207077376 |
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| author | Qin Jiang Baohong Li Yingmin Zhang Ziwen Wang Tianqi Liu Tengxin Wang Min Zhang |
| author_facet | Qin Jiang Baohong Li Yingmin Zhang Ziwen Wang Tianqi Liu Tengxin Wang Min Zhang |
| author_sort | Qin Jiang |
| collection | DOAJ |
| description | In order to analyze the impact of power flow transfer of the DC grid on safe operation, this paper studies the calculation methods of power flow transfer of the DC grid under master–slave control and droop control, including the calculation of power flow transfer in line disconnection situation and converter power changing situation. Through the proposed calculation methods, by considering the safety boundary constraints of the converter station based on the PQ power domain, the impact on the safe operation of a complex DC grid when power flow transferring is analyzed. Finally, to solve instability caused by the power flow transfer, a virtual impedance-based method is introduced to increase the safety boundary and enhances the stable operation ability of the system. Finally, the simulations of an 11-terminal CIGRE DC system established in PSCAD/EMTDC software verify the correctness of the proposed method. 11 This work is supported by Cloud energy storage framework-based AI dispatching strategy of renewable energy integration and contingency response (5100-202199274A-0-0-00). |
| first_indexed | 2024-03-13T00:03:46Z |
| format | Article |
| id | doaj.art-4761cbe153324b48a197df431c8d5361 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-03-13T00:03:46Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-4761cbe153324b48a197df431c8d53612023-07-13T05:28:37ZengElsevierEnergy Reports2352-48472023-12-01917201730Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundaryQin Jiang0Baohong Li1Yingmin Zhang2Ziwen Wang3Tianqi Liu4Tengxin Wang5Min Zhang6School of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, China; Corresponding author.School of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaState Grid Shanxi Electric Power Research Institute, Taiyuan 030002, ChinaState Grid Shanxi Electric Power Research Institute, Taiyuan 030002, ChinaIn order to analyze the impact of power flow transfer of the DC grid on safe operation, this paper studies the calculation methods of power flow transfer of the DC grid under master–slave control and droop control, including the calculation of power flow transfer in line disconnection situation and converter power changing situation. Through the proposed calculation methods, by considering the safety boundary constraints of the converter station based on the PQ power domain, the impact on the safe operation of a complex DC grid when power flow transferring is analyzed. Finally, to solve instability caused by the power flow transfer, a virtual impedance-based method is introduced to increase the safety boundary and enhances the stable operation ability of the system. Finally, the simulations of an 11-terminal CIGRE DC system established in PSCAD/EMTDC software verify the correctness of the proposed method. 11 This work is supported by Cloud energy storage framework-based AI dispatching strategy of renewable energy integration and contingency response (5100-202199274A-0-0-00).http://www.sciencedirect.com/science/article/pii/S235248472202577XDC gridPower flow transferSafety boundaryVirtual impedance |
| spellingShingle | Qin Jiang Baohong Li Yingmin Zhang Ziwen Wang Tianqi Liu Tengxin Wang Min Zhang Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary Energy Reports DC grid Power flow transfer Safety boundary Virtual impedance |
| title | Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary |
| title_full | Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary |
| title_fullStr | Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary |
| title_full_unstemmed | Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary |
| title_short | Analysis of power flow transfer characteristics and stability improvement method of DC grid considering converter’s safety boundary |
| title_sort | analysis of power flow transfer characteristics and stability improvement method of dc grid considering converter s safety boundary |
| topic | DC grid Power flow transfer Safety boundary Virtual impedance |
| url | http://www.sciencedirect.com/science/article/pii/S235248472202577X |
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