The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree
With the increasing integration of huge-size generators and tighter interconnection among power grids, in internal fault, the fault current of Series Compensated (SC) lines may be reversed. At this time, the differential protection of SC lines may fail to operate due to insufficient sensitivity. In...
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| Format: | Article |
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MDPI AG
2019-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/9/1639 |
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| author | Zhenxing Li Yuting Fu Ling Wang Lu Wang Wenliang Bao Yanxia Chen |
| author_facet | Zhenxing Li Yuting Fu Ling Wang Lu Wang Wenliang Bao Yanxia Chen |
| author_sort | Zhenxing Li |
| collection | DOAJ |
| description | With the increasing integration of huge-size generators and tighter interconnection among power grids, in internal fault, the fault current of Series Compensated (SC) lines may be reversed. At this time, the differential protection of SC lines may fail to operate due to insufficient sensitivity. In this research analyzes the reasons for the current reverse in SC lines and its effect on differential protection. The operation characteristics of differential protection are studied by focusing on multiple factors, including different series compensation degree, fault types, system operation mode, power angle difference, fault points, and transition resistance. An improved criterion based on the current amplitudes and phases on both sides of the series compensated lines is proposed. Further, to strengthen the operation characteristics of differential protection, the triple-fold line is chosen to improve the sensitivity for internal faults in this paper. The criterion is effective to improve the protection sensitivity of SC lines during internal fault. The PSCAD/EMTDC simulation and the power system dynamic physics simulation demonstrates that protection sensitivity is obviously increased in the improved scheme. |
| first_indexed | 2024-04-14T01:20:25Z |
| format | Article |
| id | doaj.art-3b5742fcb27043ea8d4757b7735c8e2c |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T01:20:25Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj.art-3b5742fcb27043ea8d4757b7735c8e2c2022-12-22T02:20:39ZengMDPI AGEnergies1996-10732019-04-01129163910.3390/en12091639en12091639The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation DegreeZhenxing Li0Yuting Fu1Ling Wang2Lu Wang3Wenliang Bao4Yanxia Chen5College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, ChinaState Grid Yichang Electric Power Company, Yichang 443000, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, ChinaCollege of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, ChinaBeijing Electric Power Research Institute, Beijing 100075, ChinaWith the increasing integration of huge-size generators and tighter interconnection among power grids, in internal fault, the fault current of Series Compensated (SC) lines may be reversed. At this time, the differential protection of SC lines may fail to operate due to insufficient sensitivity. In this research analyzes the reasons for the current reverse in SC lines and its effect on differential protection. The operation characteristics of differential protection are studied by focusing on multiple factors, including different series compensation degree, fault types, system operation mode, power angle difference, fault points, and transition resistance. An improved criterion based on the current amplitudes and phases on both sides of the series compensated lines is proposed. Further, to strengthen the operation characteristics of differential protection, the triple-fold line is chosen to improve the sensitivity for internal faults in this paper. The criterion is effective to improve the protection sensitivity of SC lines during internal fault. The PSCAD/EMTDC simulation and the power system dynamic physics simulation demonstrates that protection sensitivity is obviously increased in the improved scheme.https://www.mdpi.com/1996-1073/12/9/1639series compensation devicecurrent reversedifferential protectionsensitivity analysis |
| spellingShingle | Zhenxing Li Yuting Fu Ling Wang Lu Wang Wenliang Bao Yanxia Chen The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree Energies series compensation device current reverse differential protection sensitivity analysis |
| title | The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree |
| title_full | The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree |
| title_fullStr | The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree |
| title_full_unstemmed | The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree |
| title_short | The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree |
| title_sort | analysis and solution of current differential protection maloperation for transmission line with high series compensation degree |
| topic | series compensation device current reverse differential protection sensitivity analysis |
| url | https://www.mdpi.com/1996-1073/12/9/1639 |
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