Pilot protection of flexible DC line based on Jaccard similarity integration criterion
The flexible DC line protection based on the double-ended method with large communication and long action time is greatly affected by factors such as noise, which makes it difficult to set. Based on this, a pilot protection method of flexible DC line based on Jaccard similarity integration criterion...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2023-03-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/220517703 |
| _version_ | 1827978558997266432 |
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| author | LI Zhenxing SHE Shuangxi XU Hao CUI Xiaolin LI Zhenhua ZHANG Mengmeng |
| author_facet | LI Zhenxing SHE Shuangxi XU Hao CUI Xiaolin LI Zhenhua ZHANG Mengmeng |
| author_sort | LI Zhenxing |
| collection | DOAJ |
| description | The flexible DC line protection based on the double-ended method with large communication and long action time is greatly affected by factors such as noise, which makes it difficult to set. Based on this, a pilot protection method of flexible DC line based on Jaccard similarity integration criterion is proposed. Firstly, the fault characteristics of voltage and current change rate in the case of internal and external faults of flexible DC lines are analyzed, and the conversion relationship between analog quantities and logical quantities is constructed respectively. Then a Jaccard similarity model based on the comparison of logical quantities under the 0.5 ms data window is proposed. The integrated criterion is constructed with high similarity to realize fault type identification, and fault starting and fault pole selection criteria are not required. Finally, the double-ended longitudinal protection scheme based on the comparison of logical quantities realizes the rapid protection of the flexible DC line. The scheme is easy to be implemented, because the protection principle of that is simple with fast action speed. Using the four-terminal flexible straight model built by PSCAD/EMTDC, the protection effectiveness in various scenarios such as different fault types, high-resistance grounding, and noise interference inside and outside the zone were verified. |
| first_indexed | 2024-04-09T21:22:47Z |
| format | Article |
| id | doaj.art-78829498a1e6433e8078e54148b77e02 |
| institution | Directory Open Access Journal |
| issn | 2096-3203 |
| language | zho |
| last_indexed | 2024-04-09T21:22:47Z |
| publishDate | 2023-03-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj.art-78829498a1e6433e8078e54148b77e022023-03-28T03:31:10ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032023-03-014229410210.12158/j.2096-3203.2023.02.011220517703Pilot protection of flexible DC line based on Jaccard similarity integration criterionLI Zhenxing0SHE Shuangxi1XU Hao2CUI Xiaolin3LI Zhenhua4ZHANG Mengmeng5Hubei Provincial Engineering Technology Research Center for Power Transmission Line (China Three Gorges University), Yichang 443002, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, ChinaEHV Company of State Grid Hubei Electric Power Co., Ltd., Wuhan 430050, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, ChinaHubei Provincial Engineering Technology Research Center for Power Transmission Line (China Three Gorges University), Yichang 443002, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, ChinaThe flexible DC line protection based on the double-ended method with large communication and long action time is greatly affected by factors such as noise, which makes it difficult to set. Based on this, a pilot protection method of flexible DC line based on Jaccard similarity integration criterion is proposed. Firstly, the fault characteristics of voltage and current change rate in the case of internal and external faults of flexible DC lines are analyzed, and the conversion relationship between analog quantities and logical quantities is constructed respectively. Then a Jaccard similarity model based on the comparison of logical quantities under the 0.5 ms data window is proposed. The integrated criterion is constructed with high similarity to realize fault type identification, and fault starting and fault pole selection criteria are not required. Finally, the double-ended longitudinal protection scheme based on the comparison of logical quantities realizes the rapid protection of the flexible DC line. The scheme is easy to be implemented, because the protection principle of that is simple with fast action speed. Using the four-terminal flexible straight model built by PSCAD/EMTDC, the protection effectiveness in various scenarios such as different fault types, high-resistance grounding, and noise interference inside and outside the zone were verified.https://www.epet-info.com/dlgcjsen/article/abstract/220517703four-terminal flexible dc transmission systemflexible dc linejaccard similarityintegration criterionpilot protectionfault type identification |
| spellingShingle | LI Zhenxing SHE Shuangxi XU Hao CUI Xiaolin LI Zhenhua ZHANG Mengmeng Pilot protection of flexible DC line based on Jaccard similarity integration criterion 电力工程技术 four-terminal flexible dc transmission system flexible dc line jaccard similarity integration criterion pilot protection fault type identification |
| title | Pilot protection of flexible DC line based on Jaccard similarity integration criterion |
| title_full | Pilot protection of flexible DC line based on Jaccard similarity integration criterion |
| title_fullStr | Pilot protection of flexible DC line based on Jaccard similarity integration criterion |
| title_full_unstemmed | Pilot protection of flexible DC line based on Jaccard similarity integration criterion |
| title_short | Pilot protection of flexible DC line based on Jaccard similarity integration criterion |
| title_sort | pilot protection of flexible dc line based on jaccard similarity integration criterion |
| topic | four-terminal flexible dc transmission system flexible dc line jaccard similarity integration criterion pilot protection fault type identification |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/220517703 |
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