Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization
The existing earth fault detection methods for low-voltage distribution networks demonstrate poor adaptability to faults with fault resistance. To address this problem, the composition of residual current during non-fault states and its impact on earth fault detection are analysed. A distributed ear...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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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/S0142061525003199 |
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| author | Zhongyu Sun Bingyin Xu Wei Wang Tony Yip Fan Li |
| author_facet | Zhongyu Sun Bingyin Xu Wei Wang Tony Yip Fan Li |
| author_sort | Zhongyu Sun |
| collection | DOAJ |
| description | The existing earth fault detection methods for low-voltage distribution networks demonstrate poor adaptability to faults with fault resistance. To address this problem, the composition of residual current during non-fault states and its impact on earth fault detection are analysed. A distributed earth fault detection method is then proposed. This method divides a low-voltage distribution network into multiple protection zones and uses the differential residual current of each protection zone to identify earth faults, effectively reducing the impact of residual current during non-fault states. Furthermore, a time synchronization technique using phase voltage as a reference is proposed, which achieves low-cost time synchronization without relying on external clocks. The effectiveness of the proposed method is verified by simulations and field tests in an actual low-voltage platform. Compared with conventional approaches, the proposed method exhibits significant enhancements in both sensitivity and reliability. |
| format | Article |
| id | doaj-art-3a66a1c6b9e2469a9162d2b87cd5a596 |
| institution | OA Journals |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-3a66a1c6b9e2469a9162d2b87cd5a5962025-08-20T02:07:56ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-08-0116911077110.1016/j.ijepes.2025.110771Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronizationZhongyu Sun0Bingyin Xu1Wei Wang2Tony Yip3Fan Li4School of Electrical Engineering, Shandong University, Shandong, Jinan 250061, ChinaSchool of Electrical Engineering, Shandong University, Shandong, Jinan 250061, China; School of Electrical and Electronic Engineering, Shandong University of Technology, Shandong, Zibo 255000, China; Corresponding author at: School of Electrical Engineering, Shandong University, Shandong, Jinan 250061, China.School of Electrical and Electronic Engineering, Shandong University of Technology, Shandong, Zibo 255000, ChinaKehui International Ltd, Hertford, Hertfordshire SG13 7GX, UKState Grid Weihai Power Supply Company, Shandong, Weihai 264200, ChinaThe existing earth fault detection methods for low-voltage distribution networks demonstrate poor adaptability to faults with fault resistance. To address this problem, the composition of residual current during non-fault states and its impact on earth fault detection are analysed. A distributed earth fault detection method is then proposed. This method divides a low-voltage distribution network into multiple protection zones and uses the differential residual current of each protection zone to identify earth faults, effectively reducing the impact of residual current during non-fault states. Furthermore, a time synchronization technique using phase voltage as a reference is proposed, which achieves low-cost time synchronization without relying on external clocks. The effectiveness of the proposed method is verified by simulations and field tests in an actual low-voltage platform. Compared with conventional approaches, the proposed method exhibits significant enhancements in both sensitivity and reliability.http://www.sciencedirect.com/science/article/pii/S0142061525003199Differential residual currentEarth fault detectionLow-voltage distribution networksTime synchronizationProtection zones |
| spellingShingle | Zhongyu Sun Bingyin Xu Wei Wang Tony Yip Fan Li Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization International Journal of Electrical Power & Energy Systems Differential residual current Earth fault detection Low-voltage distribution networks Time synchronization Protection zones |
| title | Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| title_full | Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| title_fullStr | Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| title_full_unstemmed | Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| title_short | Distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| title_sort | distributed earth fault detection method for low voltage distribution networks using phase voltage synchronization |
| topic | Differential residual current Earth fault detection Low-voltage distribution networks Time synchronization Protection zones |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525003199 |
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