Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy
The flexible DC transmission project of renewable energy has become an inevitable development trend for large-scale renewable energy grid connection. Its two-terminal weak feed AC system is often composed of 100 % power electronic power equipment. The fault control strategy is used at both ends of t...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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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/S0142061524006197 |
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| _version_ | 1832595380619968512 |
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| author | Junjie Hou Qiangqiang Gao Yanfang Fan Guobing Song Xiaofang Wu Wentao Yang Runbin Cao Faxi Peng |
| author_facet | Junjie Hou Qiangqiang Gao Yanfang Fan Guobing Song Xiaofang Wu Wentao Yang Runbin Cao Faxi Peng |
| author_sort | Junjie Hou |
| collection | DOAJ |
| description | The flexible DC transmission project of renewable energy has become an inevitable development trend for large-scale renewable energy grid connection. Its two-terminal weak feed AC system is often composed of 100 % power electronic power equipment. The fault control strategy is used at both ends of the line to change the fault current characteristics, leading to a decrease in the performance of traditional differential protection. Based on analyzing the adaptability of current differential protection in the two-terminal weak feed AC system under traditional control strategy (TCS), this paper proposed an improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy. Firstly, the fault characteristics of the two terminal weak feed AC systems are analyzed. On this basis, the adaptability of differential protection under TCS is analyzed, and the quantization function that can quantify the operation performance of differential protection is given. Secondly, based on the problem of the traditional negative sequence control strategy, an improved control strategy is introduced and the operation performance of differential protection under the improved control strategy is studied. Finally, an improved differential protection scheme based on the change of current amplitude is proposed. Simulation results show that the proposed protection scheme can resist higher fault impedance(300 Ω) and noise interference(25 dB). In addition, the proposed differential protection scheme is suitable for the protection requirements of the two terminal weak feed AC systems in different scenarios and has higher sensitivity. |
| format | Article |
| id | doaj-art-278a033d828c4a1589190f7b89bacfa0 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-278a033d828c4a1589190f7b89bacfa02025-01-19T06:23:54ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-03-01164110396Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategyJunjie Hou0Qiangqiang Gao1Yanfang Fan2Guobing Song3Xiaofang Wu4Wentao Yang5Runbin Cao6Faxi Peng7School of Electrical Engineering, Xinjiang University, Urumqi, China; Corresponding author.School of Electrical Engineering, Xinjiang University, Urumqi, ChinaSchool of Electrical Engineering, Xinjiang University, Urumqi, ChinaSchool of Electrical Engineering, Xinjiang University, Urumqi, China; School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, ChinaElectric Power Research Institute of State Grid Xinjiang Electric Power Co.Ltd, Xinjiang, ChinaSchool of Electrical Engineering, Xinjiang University, Urumqi, ChinaState Key Laboratory of HVDC (Electric Power Research Institute of China Southern Power Grid Company Limited), Guangzhou, ChinaState Key Laboratory of HVDC (Electric Power Research Institute of China Southern Power Grid Company Limited), Guangzhou, ChinaThe flexible DC transmission project of renewable energy has become an inevitable development trend for large-scale renewable energy grid connection. Its two-terminal weak feed AC system is often composed of 100 % power electronic power equipment. The fault control strategy is used at both ends of the line to change the fault current characteristics, leading to a decrease in the performance of traditional differential protection. Based on analyzing the adaptability of current differential protection in the two-terminal weak feed AC system under traditional control strategy (TCS), this paper proposed an improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy. Firstly, the fault characteristics of the two terminal weak feed AC systems are analyzed. On this basis, the adaptability of differential protection under TCS is analyzed, and the quantization function that can quantify the operation performance of differential protection is given. Secondly, based on the problem of the traditional negative sequence control strategy, an improved control strategy is introduced and the operation performance of differential protection under the improved control strategy is studied. Finally, an improved differential protection scheme based on the change of current amplitude is proposed. Simulation results show that the proposed protection scheme can resist higher fault impedance(300 Ω) and noise interference(25 dB). In addition, the proposed differential protection scheme is suitable for the protection requirements of the two terminal weak feed AC systems in different scenarios and has higher sensitivity.http://www.sciencedirect.com/science/article/pii/S0142061524006197Two-terminal weak feed AC systemCurrent differential protectionNegative sequence control strategyAdaptive functionSensitivity |
| spellingShingle | Junjie Hou Qiangqiang Gao Yanfang Fan Guobing Song Xiaofang Wu Wentao Yang Runbin Cao Faxi Peng Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy International Journal of Electrical Power & Energy Systems Two-terminal weak feed AC system Current differential protection Negative sequence control strategy Adaptive function Sensitivity |
| title | Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy |
| title_full | Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy |
| title_fullStr | Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy |
| title_full_unstemmed | Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy |
| title_short | Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy |
| title_sort | improved differential protection for two terminal weak feed ac system considering negative sequence control coordination strategy |
| topic | Two-terminal weak feed AC system Current differential protection Negative sequence control strategy Adaptive function Sensitivity |
| url | http://www.sciencedirect.com/science/article/pii/S0142061524006197 |
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