| 基于DG综合配电系统的多元件电流差动保护方法 |
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| 引用本文：朱力1,肖明东1,朱博1,杨金龙2.基于DG综合配电系统的多元件电流差动保护方法[J].电网与清洁能源,2025,41(4):27~33 |
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| 基金项目:国家自然科学基金项目（52107108） |
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| 中文摘要:随着分布式发电（distributed generation，DG）大规模集成到配电系统，与横向保护协调和中间DG馈电或负载等问题使传统过电流保护方案已不再适用。提出了一种基于DG综合配电系统的多元件电流差动保护方法，可在故障期间使尽可能多的负载和DG单元保持运行。首先，介绍了所提多元件电流差动保护方法的基本原理。然后，对所提多元件电流差动保护方法的正常设置程序进行详细阐述，差动保护区中的多个延时差动元件保证了该保护区的横向保护装置与连续差动保护区间的协调性，灵敏延时差动元件可保护相对较高的电阻故障，而瞬时差动元件可以尽可能提高保护速度。最后，将所提出的方案应用于具有环形拓扑和分布式发电的实际中压配电系统模型，仿真结果证明了所提出方案的实用性和优越性。 |
| 中文关键词:分布式发电 差动保护 差动元件 环形拓扑 中压配电系统 |
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| A Multi-Component Current Differential Protection Method Based on DG Integrated Distribution System |
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| Abstract:With the large-scale integration of distributed generation（DG） into distribution systems， traditional overcurrent protection schemes are no longer applicable due to issues such as lateral protection coordination and intermediate DG feeding or load. This paper proposes a multi-element current differential protection method based on DG integrated distribution systems， which can keep as many loads and DG units in operation as much as possible during the fault. Firstly， the basic principle of the proposed multi-element current differential protection method is introduced. Next， the normal setting procedure of the proposed multi-element current differential protection method is elaborated in detail. The multiple delay differential elements in the differential protection zone ensure the coordination between the lateral protection device of the protection zone and the continuous differential protection zone. The sensitive delay differential element can protect relatively high resistance faults， while the instantaneous differential element can increase the protection speed as much as possible. Finally， the proposed scheme is applied to an actual medium voltage distribution system model with a ring topology and distributed generation， and the simulation results have proved the practicality and superiority of the proposed scheme. |
| keywords:distributed power generation differential protection differential components ring topology medium voltage distribution system |
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