一种基于序分量关系的单端输电线路故障测距算法  

A Single Terminal Fault Location Method of Transmission Line Based on Relationship of Sequence Components

作　　者：李笑夫 范春菊[1] 邓孟华[2] 张帆[1] 姜军[1] 郭煜华[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海市电力公司市南供电公司,上海200233

出　　处：《水电能源科学》2017年第5期187-190,216,共5页Water Resources and Power

摘　　要：为准确确定输电线路故障点位置,提出一种基于单端电气量的输电线路故障测距算法,该算法采用分布参数模型,通过保护安装处的电气量计算各序分量,然后推导出故障点各序分量值,利用不同故障类型的序分量的关系获得故障测距的电气序分量关系,根据过渡电阻不含电抗的特点,构造出基于过渡电阻虚部为零的测距方程。利用PSCAD和RTDS软件对算法进行数字仿真表明,该测距算法合理、有效。A kind of single terminal transmission line fault location method based sequence components is proposed in this paper.The algorithm adopts distributed parameter model and calculates various sequence components from electrical quantities at relay location.And then the relationship among electrical sequence components of fault location is deduced.The fault location equation is constructed based on the imaginary part of transition resistance is zero.The method dispensed with the electrical quantities such as voltage and current of the opposite terminal and locates the fault by one-dimension search.The result is of high accuracy and out of the influence of false root.The results of PSCAD and RTDS simulation indicate the effectiveness of the method.

关 键 词：输电线路 故障测距 序分量 单端测距法 

分 类 号：TM75[电气工程—电力系统及自动化]