一种适用于特高压线路的快速选相方法  

A method of fast faulted phase detection suitable for UHV transmission lines

作　　者：梁景芳[1] 高厚磊[1] 苏文博[2] 王大鹏[2] 邹贵彬[1] 

机构地区：[1]山东大学电气工程学院,山东济南250061 [2]山东电力研究院,山东济南250002

出　　处：《电力系统保护与控制》2010年第15期95-99,131,共6页Power System Protection and Control

基　　金：教育部博士点基金课题(20070422099);山东电力集团科技项目支持课题(2008A-26)

摘　　要：分析了电流模故障分量的基本特征,根据不同故障类型下电流模故障分量的能量差异,提出了一种快速的故障选相方法。该方法以各模量电流的能量作为特征量并利用其最小值进行故障选相,其原理清晰,可靠性高,易于实现。PSCAD/EMTDC仿真结果表明,该方法能快速准确地识别特高压线路上发生的各种类型故障,且不易受到采样频率、故障初始角、过渡电阻、故障位置等因素的影响,具有较好的适应性。The basic characteristics of the current modular fault components are analyzed.According to energy differences of current modular fault components under different fault types,this paper proposes a new fast faulted phase detection method.Taking energy of each modular fault current as character quantity and utilizing their minimum,faulted phase detection is achieved.T he principle of this method is reliable,and easy to understand and implement.Simulation results based on PSCAD/EMTDC show that this method can rapidly and accurately identify various fault types on UHV transmission lines.Moreover,this method is almost not affected by sampling frequency,fault inception angle,fault resistance,fault location,etc.So it has a good adaptability.

关 键 词：故障选相 模故障分量 能量最小值 特高压线路 

分 类 号：TM773[电气工程—电力系统及自动化]