同杆并架双回线基于电流突变量的综合选相  

Phase Selector Based on Fault Component Current for Double-circuit Transmission Lines on Single Tower

作　　者：刘千宽[1] 黄少锋[1] 王兴国[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京市102206

出　　处：《电力系统自动化》2007年第21期53-57,共5页Automation of Electric Power Systems

摘　　要：相电流差突变量选相元件在单回线故障中具有良好的选相性能,但在同杆双回线跨线故障中可能误选相。利用六序故障分量的分析方法,分析了相电流突变量在同杆双回线跨线故障中的幅值和相位特征,给出了其相位比相方程。在此基础上,提出了一种运用测量阻抗和方向元件相结合的综合选相方法,并给出了选相流程图。仿真结果表明,在双回线简单故障和跨线故障时,基于单回线单端电气量的同杆并架双回线综合选相方法具有较理想的选相性能。Although fault component current phase selector has excellent performance for single transmission lines, it may select unwanted phase for cross-country faults in double-circuit lines on a same tower. By using the six-sequence fault component, this paper investigates the amplitude and phasor characteristics of fault component current for cross faults of double lines with their phasor comparison equations presented. Based on the results of fault component current phase selector, a kind of synthesis selection scheme, which takes impedance measurement and directional component as supplementary method, is put forward and its flow chart for phase selection is given. Dynamic simulation results by using RTDS show that the synthesis phase selection scheme based on the quantities of single lines at one terminal has better performance for simple faults and crosscountry faults of double-circuit lines.

关 键 词：同杆并架双回线 选相 六序故障分量 跨线故障 

分 类 号：TM753[电气工程—电力系统及自动化]