微网故障特性分析及保护方法

摘要/Abstract

摘要：

摘要：建立了微电网模型，分析了微网短路时故障电流的特点，结合现有成果对微电网保护方法做了综述性研究.首先，建立了逆变型微电源模型，并验证了线路发生不同故障时微电源的安全稳定性；其次，建立了微电网模型，分析了负荷侧短路时故障电流偏小的特点，指出有必要研究不依赖故障电流模值的保护策略，并能与联网运行时的保护相配合，使微网的保护尽可能统一；然后，从孤岛和并网两个方面归纳了当前微网保护的最新研究成果，对比分析各种保护技术的优劣.最后，展望微电网保护的发展方向，指出以通信为基础，控制与保护功能相结合，实现保护功能的集成化是微电网保护的发展目标.

关键词: 分布式电源, 微电网, 故障特性, 微电网保护

Abstract:

Abstract： A simulation model of microgrid was built, the characteristics of fault current were analyzed, and the existing microgrid protection technologies were reviewed in this paper. First, simulation model of IIDG was built to study fault characteristics and verify the stability of microgrid while different faults occur on the transmission line. Then, the simulation model of microgrid was built to study fault characteristics under islanded mode and gridconnected mode.The result shows that it is necessary to study new protection strategies which do not depend on the fault current effective value. After that, the latest research progresses of microgrid protection technologies were summarized and the advantages and disadvantages of various protection technologies were analyzed. Finally, the research direction and the research objective were prospected, pointing out that the extensiveness of information collection and the integration of protection function were the aims of microgrid protection.
Key words：

Key words: distributed generation, microgrid, fault characteristics;microgrid protection

中图分类号:

TM 77

赵俊瑞，王占山，王继东，张化光. 微网故障特性分析及保护方法[J]. 上海交通大学学报（自然版）, 2015, 49(06): 913-922.

ZHAO Junrui,WANG Zhanshan,WANG Jidong,ZHANG Huaguang. Fault Characteristics of Microgrid and Protection Strategies[J]. Journal of Shanghai Jiaotong University, 2015, 49(06): 913-922.

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