A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration
Calculating short-circuit currents in active distribution networks by treating renewable energy as a constant current source tends to overestimate its impact on overcurrent protection, while refined methods such as iterative calculations are difficult to promote and apply in real engineering scenari...
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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/S0142061524006410 |
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| author | Rongqi Fan Yuanlong Liu Lei Ding Qiang Huang Wei Cong Yudun Li Guobing Song Zhui Wei Lingyan Sun Jifeng Wen anning Wang |
| author_facet | Rongqi Fan Yuanlong Liu Lei Ding Qiang Huang Wei Cong Yudun Li Guobing Song Zhui Wei Lingyan Sun Jifeng Wen anning Wang |
| author_sort | Rongqi Fan |
| collection | DOAJ |
| description | Calculating short-circuit currents in active distribution networks by treating renewable energy as a constant current source tends to overestimate its impact on overcurrent protection, while refined methods such as iterative calculations are difficult to promote and apply in real engineering scenarios. This research first analyzes the voltage and current relationships of renewable energy sources in a 10 kV neutral-point-ungrounded system under both symmetrical and asymmetrical faults, with a focus on engineering feasibility. Next, the study examines the voltage increase and its increment ratio at the fault point and renewable energy connection point, with and without the presence of renewable energy sources. It is found that the voltage increment ratio at the fault point is consistent with that at the renewable energy connection point. Based on this observation, a fast calculation method for short-circuit current in networks with renewable energy integration is proposed, utilizing voltage increments. Finally, a fault simulation model for a distribution network with high renewable energy penetration is developed in PSCAD/EMTDC, and a short-circuit experiment is conducted in an actual distribution network. The results from both the software simulation and real-world experiment demonstrate that the proposed short-circuit current calculation method offers high accuracy, and can satisfy the required accuracy for protection settings. |
| format | Article |
| id | doaj-art-4361a1f66cbe4bf79b7917180a9e7b41 |
| 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-4361a1f66cbe4bf79b7917180a9e7b412025-01-19T06:23:58ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-03-01164110418A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetrationRongqi Fan0Yuanlong Liu1Lei Ding2Qiang Huang3Wei Cong4Yudun Li5Guobing Song6Zhui Wei7Lingyan Sun8Jifeng Wen9anning Wang10State Grid Shandong Electric Company, Ji’nan 250001, China; Corresponding author.State Grid Shandong Electric Company, Ji’nan 250001, ChinaShandong University, Ji’nan 250100, ChinaState Grid Shandong Electric Power Research Institute, Ji’nan 250003, ChinaShandong University, Ji’nan 250100, ChinaState Grid Shandong Electric Power Research Institute, Ji’nan 250003, ChinaGuobing Song, Xi’an Jiaotong University, Xi’an 710049, ChinaState Grid Shandong Electric Power Company Liaocheng Power Supply Company, Liaocheng 252003, ChinaState Grid Shandong Electric Power Company Liaocheng Power Supply Company, Liaocheng 252003, ChinaNARI Relays Electric Co., Ltd. Nanjing, Nanjing 211106, ChinaState Grid Shandong Electric Company, Ji’nan 250001, ChinaCalculating short-circuit currents in active distribution networks by treating renewable energy as a constant current source tends to overestimate its impact on overcurrent protection, while refined methods such as iterative calculations are difficult to promote and apply in real engineering scenarios. This research first analyzes the voltage and current relationships of renewable energy sources in a 10 kV neutral-point-ungrounded system under both symmetrical and asymmetrical faults, with a focus on engineering feasibility. Next, the study examines the voltage increase and its increment ratio at the fault point and renewable energy connection point, with and without the presence of renewable energy sources. It is found that the voltage increment ratio at the fault point is consistent with that at the renewable energy connection point. Based on this observation, a fast calculation method for short-circuit current in networks with renewable energy integration is proposed, utilizing voltage increments. Finally, a fault simulation model for a distribution network with high renewable energy penetration is developed in PSCAD/EMTDC, and a short-circuit experiment is conducted in an actual distribution network. The results from both the software simulation and real-world experiment demonstrate that the proposed short-circuit current calculation method offers high accuracy, and can satisfy the required accuracy for protection settings.http://www.sciencedirect.com/science/article/pii/S0142061524006410High renewable energy penetration in distribution networksVoltage increment analysisFast short-circuit current calculationDistribution network protection settings |
| spellingShingle | Rongqi Fan Yuanlong Liu Lei Ding Qiang Huang Wei Cong Yudun Li Guobing Song Zhui Wei Lingyan Sun Jifeng Wen anning Wang A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration International Journal of Electrical Power & Energy Systems High renewable energy penetration in distribution networks Voltage increment analysis Fast short-circuit current calculation Distribution network protection settings |
| title | A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration |
| title_full | A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration |
| title_fullStr | A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration |
| title_full_unstemmed | A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration |
| title_short | A rapid method for calculating short-circuit currents in distribution networks with high renewable energy penetration |
| title_sort | rapid method for calculating short circuit currents in distribution networks with high renewable energy penetration |
| topic | High renewable energy penetration in distribution networks Voltage increment analysis Fast short-circuit current calculation Distribution network protection settings |
| url | http://www.sciencedirect.com/science/article/pii/S0142061524006410 |
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