一种利用双端电气量的故障测距新算法  

A new fault location algorithm with two-terminal electric quantities

作　　者：张向聪 夏经德[1,2] 陈伟利 王波[1] 康小宁[2] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048 [2]西安交通大学电气工程学院,陕西西安710049 [3]大唐环境产业集团股份有限公司特许经营分公司,江苏南京211100

出　　处：《西安工程大学学报》2016年第2期218-224,共7页Journal of Xi’an Polytechnic University

基　　金：国家自然科学基金资助项目(51037005)

摘　　要：针对现有双端量故障测距算法求解过程趋于复杂化等问题,提出一种基于对称分量法的双端量故障测距新算法.根据附加正序网络中线路两端正序电压相量之差与正序电流相量之和的比值特性建立故障测距方程式,并通过求解测距方程实现故障测距.该算法能够在线计算出线路正序参数和系统正序阻抗,减小了输电线路参数和系统阻抗对测距精度的影响具有计算量小,不存在伪根的优点.ATP仿真结果表明,该算法也不受故障类型、故障距离和故障电阻的影响,具有较高的测距精度.In view of the complexity in the process of solving the fault distance ,a novel fault lo‐cation algorithm of using two‐terminal electric quantities is proposed ,based on the method of symmetrical components .T he fault location equation is established according to the ratio of the subtraction of the voltages and the sum of the currents in the additional positive sequence net‐work .The algorithm can calculate the transmission positive line parameter and system impedence online ,reduce the impact of transmission line parameters and system impedence variation on the accuracy of fault location the fault location equation is easy to solve without false solu‐tion .ATP simulation results show that the algorithm can be executed without the influence of the fault distance ,fault type and fault resistance .

关 键 词：对称分量法 双端量 正序网络 比值特性 故障分量 

分 类 号：TM73[电气工程—电力系统及自动化]