An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs
Due to the inherent output fluctuations of inverter-interfaced distributed generators （IIDGs）， the fault characteristics of distribution networks have changed， posing challenges for relay protection setting. Taking a typical low-resistance grounding system with IIDG as an example， this paper first a...
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zhejiang electric power
2025-07-01
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| Series: | Zhejiang dianli |
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| Online Access: | https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/179b88083e3f779cb2cb2c20901ad4d6 |
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| _version_ | 1849246020271079424 |
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| author | LI Juan JIANG Yunlong ZHU Rui YANG Xiong |
| author_facet | LI Juan JIANG Yunlong ZHU Rui YANG Xiong |
| author_sort | LI Juan |
| collection | DOAJ |
| description | Due to the inherent output fluctuations of inverter-interfaced distributed generators （IIDGs）， the fault characteristics of distribution networks have changed， posing challenges for relay protection setting. Taking a typical low-resistance grounding system with IIDG as an example， this paper first analyzes the zero-sequence current characteristics during single phase-to-ground faults after IIDG integration and clarifies its impact on traditional instantaneous zero-sequence current protection. Based on this analysis， a fault current calculation algorithm for IIDGs is proposed， along with an adaptive zero-sequence current protection scheme to enhance protection selectivity and reliability， thereby accommodating high-penetration renewable energy integration. Finally， simulation results validate the effectiveness and practicality of the proposed method. |
| format | Article |
| id | doaj-art-ba5b90ed0b794a63be4c6d7be379d320 |
| institution | Kabale University |
| issn | 1007-1881 |
| language | zho |
| publishDate | 2025-07-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj-art-ba5b90ed0b794a63be4c6d7be379d3202025-08-20T03:58:36Zzhozhejiang electric powerZhejiang dianli1007-18812025-07-0144710211210.19585/j.zjdl.2025070111007-1881（2025）07-0102-11An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGsLI Juan0JIANG Yunlong1ZHU Rui2YANG Xiong3State Grid Jiangsu Electric Power Co.， Ltd. Research Institute， Nanjing 211103， ChinaState Grid Jiangsu Electric Power Co.， Ltd. Research Institute， Nanjing 211103， ChinaState Grid Jiangsu Electric Power Co.， Ltd. Research Institute， Nanjing 211103， ChinaState Grid Jiangsu Electric Power Co.， Ltd. Research Institute， Nanjing 211103， ChinaDue to the inherent output fluctuations of inverter-interfaced distributed generators （IIDGs）， the fault characteristics of distribution networks have changed， posing challenges for relay protection setting. Taking a typical low-resistance grounding system with IIDG as an example， this paper first analyzes the zero-sequence current characteristics during single phase-to-ground faults after IIDG integration and clarifies its impact on traditional instantaneous zero-sequence current protection. Based on this analysis， a fault current calculation algorithm for IIDGs is proposed， along with an adaptive zero-sequence current protection scheme to enhance protection selectivity and reliability， thereby accommodating high-penetration renewable energy integration. Finally， simulation results validate the effectiveness and practicality of the proposed method.https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/179b88083e3f779cb2cb2c20901ad4d6iidgfault currentadaptive zero-sequence current protectionsingle phase-to-ground fault |
| spellingShingle | LI Juan JIANG Yunlong ZHU Rui YANG Xiong An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs Zhejiang dianli iidg fault current adaptive zero-sequence current protection single phase-to-ground fault |
| title | An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs |
| title_full | An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs |
| title_fullStr | An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs |
| title_full_unstemmed | An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs |
| title_short | An adaptive zero-sequence current protection scheme for distribution networks based on iterative fault current calculation of IIDGs |
| title_sort | adaptive zero sequence current protection scheme for distribution networks based on iterative fault current calculation of iidgs |
| topic | iidg fault current adaptive zero-sequence current protection single phase-to-ground fault |
| url | https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/179b88083e3f779cb2cb2c20901ad4d6 |
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