含分布式能源直流-交流混合电网故障定位研究  

Research on fault location of DC⁃AC hybrid power grid with distributed energy

作　　者：张鹏昊 ZHANG Penghao(Jinan Municipal Engineering Design&Research Institute(Group)Co.,Ltd.,Jinan 250000,China)

机构地区：[1]济南市市政工程设计研究院(集团)有限责任公司,山东济南250000

出　　处：《现代电子技术》2023年第18期125-132,共8页Modern Electronics Technique

摘　　要：含分布式能源的直流-交流混合电网中,直流电网的数字故障录波器通常难以监测交流部分的故障,造成故障难以被识别及定位。为此,文中提出一种用于分布式能源的交直流混合复杂输电网的故障定位方法,无需放置虚拟总线即可准确快速地识别故障线路段。其次,研究一种新型的最佳数字故障录波器布局工艺,在安装最小数量的数字故障录波器的情况下,实现最短传播时间下监控故障;同时利用K-means聚类方法选取的故障录波器子集准确定位故障位置。最后,采用仿真软件对改进的IEEE 39总线传输系统与CIGRE B4直流电网测试系统合并形成的交直流复杂输电网进行测试。结果表明,所提方法具有较高的故障识别准确率。In the DC-AC hybrid power grid with distributed energy,the digital fault recorder in the DC grid is often difficult to monitor the faults in the AC part,making it difficult to identify and locate the faults.A fault location method for AC/DC hybrid complex power transmission network for distributed energy is proposed,which can accurately and quickly identify fault line segments without placing virtual bus.A new optimal digital fault recorder layout technology is researched to monitoring fault with the shortest propagation time under the condition of installing the minimum number of digital fault recorders.The fault location is accurately located by the subset of fault recorder selected by means of K-means clustering method.The simulation software is used to test the AC-DC complex transmission network formed by the combination of the improved IEEE 39 bus transmission system and CIGRE B4 DC grid test system.The results show that the proposed method has higher fault identification accuracy.

关 键 词：分布式能源 直流-交流混合电网 故障定位 故障录波器 K均值聚类 仿真模拟 

分 类 号：TN86-34[电子电信—信息与通信工程] TM32[电气工程—电机]