平行/同杆双回线的单线故障精确测距算法  

Single-line fault locating for double circuits on same pole or in parallel

作　　者：林军[1] 程传玲[2] 

机构地区：[1]福建工程学院电子电气系,福建福州350014 [2]福州大学电气工程系,福建福州350002

出　　处：《电力自动化设备》2008年第7期69-72,共4页Electric Power Automation Equipment

摘　　要：平行/同杆双回线的一条线路发生故障时,由于非故障线路包含了对侧系统的信息,可以实现利用单端故障信息实现故障测距。介绍平行/同杆双回线的单线故障的一种故障测距算法,算法采用正、负、零序分量的分布参数模型和传输线方程,利用线路单端的故障信息,根据实际故障点的纯电阻特征,得到平行/同杆双回线单线故障时距离测量点的距离。用特征模量分解方法解决同杆双回线的零序分量网络中存在互阻抗和互电纳的难题。算法的精度不受分布电容影响和对端系统阻抗变化的影响。精确计算表明,线路换位(相序排列)对测距精度的影响可以用误差校正曲线或表格的方法校正。When one line of double circuits on same pole or in parallel has fault,the healthy line contains the information of other terminal,which can be used to locate the fault. A fault locating algorithm is proposed for it. The distributed parameter models of positive ,zero and negative sequence components and transmission line equations are adopted,and the distance of fault point from the measuring point is calculated according to the fault information got at one line terminal and based on the pure resistance feature of actual fault point. With eigen-modulus analysis,the mutual admittance and impedance of parallel lines in zero-sequence network are de-coupled. The accuracy of algorithm is not affected by the distributed capacitance and the system impedance diversification of other terminal. The accurate calculation shows that the influence of phase arrangement on locating accuracy can be corrected by using error correction curve or table .

关 键 词：超高压 双回线 故障测距 分布参数模型 

分 类 号：TM744[电气工程—电力系统及自动化]