T接电路暂态保护分析  

Analysis of Transient Protection in T-circuit

作　　者：肖凯文[1] 陈皓[1] 宋燕霖[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《四川电力技术》2007年第3期19-22,73,共5页Sichuan Electric Power Technology

摘　　要：由于T接线路与二端口线路相比,具有良好的经济性与环保优势,因而在超高压输电系统中将会有非常广泛的应用。然而使用传统的保护方法,很难对其进行有效的保护。将基于故障暂态电流的单端量无通信保护用于T接线路,并且根据故障暂态电流的特点,利用Daubechies小波计算暂态保护判据。通过在不同的故障位置、不同的过渡电阻、不同的故障时间以及各种故障类型的情况下,对实际T接线路进行的详细仿真,证明了暂态保护应用于T接线路的可行性。T- circuits are used widely in extra high voltage （EHV） transmission system due to their significant economic and environmental advantages over two - tennlnal lines. But it is difficult to protect T- circuit using the traditional techniques. Non - communication protection based on fault transient current component is used in T - circuit, and in terms of the features of fault transient current component, transient protection criterion is calculated using Daubechies wavelet. The detailed simulation of T- circuit is carried out in different positions, different transition resistances, different fault times and different fault types, and it has proved the feasibility to use the transient protection in T- circuit.

关 键 词：T接线路 暂态保护 DAUBECHIES小波 保护判据 阻波器 

分 类 号：TM773[电气工程—电力系统及自动化]