A voltage weak node identification method considering fault reconstruction in distribution networks
The voltage crossing limit problem is gradually highlighted and the stable operation of the system is becoming increasingly complex in the context of building a new distribution system. In this paper, based on the holomorphic embedding method, the offset characteristics of node voltage indicator tra...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2025-01-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/240702621 |
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| _version_ | 1823865241984827392 |
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| author | YANG Junwen SHANG Lei YE Xinzhi LIU Chengxi DONG Xuzhu |
| author_facet | YANG Junwen SHANG Lei YE Xinzhi LIU Chengxi DONG Xuzhu |
| author_sort | YANG Junwen |
| collection | DOAJ |
| description | The voltage crossing limit problem is gradually highlighted and the stable operation of the system is becoming increasingly complex in the context of building a new distribution system. In this paper, based on the holomorphic embedding method, the offset characteristics of node voltage indicator trajectories under topology changes are studied, and a weak node identification method considering fault reconfiguration in distribution networks is proposed. Firstly, the node voltage index and distribution network voltage visible safety region are derived and constructed based on the idea of decoupling power system. Then, the node voltage index trajectory is solved based on the holomorphic embedding method. The concept of voltage index offset distance characterizing the trajectory characteristics is defined, and the probabilistic voltage index trajectory solution method is proposed taking into account the topology changes after the fault in distribution network. Finally, the weak node evaluation index system and identification method are proposed according to the relative position relationship between the voltage visible security region of distribution network and the node voltage index trajectory by considering the normal state and N-1+1 fault state operation conditions of the distribution network. Using the IEEE 33-node distribution system as an example for arithmetic analysis, the results show that the proposed method can realize the visual monitoring of the node voltage status and accurately identify the weak nodes. |
| format | Article |
| id | doaj-art-69220fca43fe4550893ce837b2fd9f61 |
| institution | Kabale University |
| issn | 2096-3203 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj-art-69220fca43fe4550893ce837b2fd9f612025-02-08T08:40:18ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032025-01-01441394910.12158/j.2096-3203.2025.01.005240702621A voltage weak node identification method considering fault reconstruction in distribution networksYANG Junwen0SHANG Lei1YE Xinzhi2LIU Chengxi3DONG Xuzhu4School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaSchool of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaState Grid Jiangsu Electric Power Co., Ltd., Nanjing Power Supply Company, Nanjing 210008, ChinaSchool of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaSchool of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, ChinaThe voltage crossing limit problem is gradually highlighted and the stable operation of the system is becoming increasingly complex in the context of building a new distribution system. In this paper, based on the holomorphic embedding method, the offset characteristics of node voltage indicator trajectories under topology changes are studied, and a weak node identification method considering fault reconfiguration in distribution networks is proposed. Firstly, the node voltage index and distribution network voltage visible safety region are derived and constructed based on the idea of decoupling power system. Then, the node voltage index trajectory is solved based on the holomorphic embedding method. The concept of voltage index offset distance characterizing the trajectory characteristics is defined, and the probabilistic voltage index trajectory solution method is proposed taking into account the topology changes after the fault in distribution network. Finally, the weak node evaluation index system and identification method are proposed according to the relative position relationship between the voltage visible security region of distribution network and the node voltage index trajectory by considering the normal state and N-1+1 fault state operation conditions of the distribution network. Using the IEEE 33-node distribution system as an example for arithmetic analysis, the results show that the proposed method can realize the visual monitoring of the node voltage status and accurately identify the weak nodes.https://www.epet-info.com/dlgcjsen/article/abstract/240702621holomorphic embedding methodweak nodefault reconstructionnode voltage indexvoltage safety regionvoltage stability boundary |
| spellingShingle | YANG Junwen SHANG Lei YE Xinzhi LIU Chengxi DONG Xuzhu A voltage weak node identification method considering fault reconstruction in distribution networks 电力工程技术 holomorphic embedding method weak node fault reconstruction node voltage index voltage safety region voltage stability boundary |
| title | A voltage weak node identification method considering fault reconstruction in distribution networks |
| title_full | A voltage weak node identification method considering fault reconstruction in distribution networks |
| title_fullStr | A voltage weak node identification method considering fault reconstruction in distribution networks |
| title_full_unstemmed | A voltage weak node identification method considering fault reconstruction in distribution networks |
| title_short | A voltage weak node identification method considering fault reconstruction in distribution networks |
| title_sort | voltage weak node identification method considering fault reconstruction in distribution networks |
| topic | holomorphic embedding method weak node fault reconstruction node voltage index voltage safety region voltage stability boundary |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/240702621 |
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