引用本文:杨晶晶,林凡勤,周成瀚,等.含分布式电源的馈线电流序分量比较式保护[J].电力系统保护与控制,2019,47(15):116-123.
YANG Jingjing,LIN Fanqin,ZHOU Chenghan,et al.Comparison protection method of current sequence components for feeder with distributed generation[J].Power System Protection and Control,2019,47(15):116-123
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含分布式电源的馈线电流序分量比较式保护
杨晶晶1,林凡勤1,周成瀚2,邹贵彬2,李颖超2,乔 珊2
(1.国网潍坊供电公司，山东 潍坊 261021;2.山东大学电气工程学院，山东 济南 250061)
摘要:
分布式电源的接入对传统配电网保护带来了严重的影响。此外，逆变型DG的故障特性以及系统的故障穿越电流均会影响到常规纵联保护的动作性能。对此，提出了一种含DG馈线的电流序分量比较式保护。针对非对称性故障，根据保护区域两侧负序电流的相位差异，构造了负序电流相位比较式保护判据。针对对称性故障，根据系统侧与DG侧提供短路电流的大小差异，构造了正序电流幅值比较式保护判据。基于上述保护原理，开发了保护样机，仿真分析与动模测试结果验证了所提含DG馈线保护的有效性。
关键词:  负序电流相位  正序电流幅值  分布式电源  馈线
DOI：10.7667/PSPC20191516
分类号:
基金项目:国家电网公司科技项目(SGSDWF00FCJS1800398)
Comparison protection method of current sequence components for feeder with distributed generation
YANG Jingjing1,LIN Fanqin1,ZHOU Chenghan2,ZOU Guibin2,LI Yingchao2,QIAO Shan2
(1. State Grid Weifang Power Supply Company, Weifang 261021, China;2. School of Electrical Engineering, Shandong University, Jinan 250061, China)
Abstract:
The integration of Distributed Generations (DGs) has great impact on the traditional distribution network protection. In addition, the fault characteristics of the inverter-interfaced DG and the through-fault current of the system affect the performance of the conventional pilot protection. Therefore, a new comparison protection method using current sequence components for feeder with DG is proposed. According to the phase difference of the negative-sequence current on both sides of the protection zone, the negative-sequence current phase comparison criterion is constructed for asymmetrical faults. As for symmetrical faults, the positive-sequence current magnitude comparison criterion is proposed based on the magnitude difference of the fault current provided by the system and the DG. Based on above protection principles, a protection prototype is developed. Extensive simulation in PSCAD software and practical tests with the protection prototype verify the effectiveness of the proposed protection method. This work is supported by Science and Technology Project of State Grid Corporation of China (No. SGSDWF00FCJS1800398).
Key words:  phase of negative sequence current  amplitude of positive sequence current  distributed generation  feeder
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