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| Research progress and prospects of protection technologies for new type power distribution systems based on power converter active signal injection |
| DOI：10.19783/j.cnki.pspc.250677 |
| Key Words:new type distribution system power converter active signal injection relay protection |
| Author Name | Affiliation | | DENG Jinglei1,2 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | YAO Liangzhong1,2 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | DENG Jinglei1,2 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | LIANG Shuai1,2 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | YANG Fei3 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | CHEN Shi4 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China | | YUAN Yubo4 | 1. Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network (Wuhan University),
Wuhan 430072, China
2. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
3. State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai 200120, China
4. Electric Power
Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China |
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| Abstract:Due to weak-feed characteristics of converter-interfaced renewable energy sources, fault characteristics in new type distribution systems are significantly weakened, rendering traditional relay protection techniques increasingly inapplicable. Active signal injection-based protection enhances fault characteristics by actively modulating converter output behavior during faults, thereby overcoming the limitations imposed by weakened characteristics and emerging as a key development direction for protection technologies in new type distribution systems. Focusing on typical fault types, research progress on protection in new type distribution systems is reviewed, highlighting the limitations of traditional passive protection methods and the necessity of developing active signal injection-based protection strategies. On this basis, the key technologies such as the generation and selection of injected signals are analyzed, common issues in existing studies are summarized, and typical application scenarios are discussed. Finally, future research directions are outlined, aiming to provide references for further in-depth studies on active signal injection-based protection technologies for new type distribution systems. |
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