基于固有频率的直流输电线路故障测距新算法  

A Novel Fault-location Method for HVDC Transmission Lines Based on Natural Frequency

作　　者：杨明玉[1] 杨立红[1] 

机构地区：[1]华北电力大学,河北保定071003

出　　处：《华东电力》2013年第3期607-611,共5页East China Electric Power

摘　　要：提出一种基于固有频率的直流输电线路故障测距新算法。引入故障距离与行波波速的一次线性函数,推导出了新的测距公式;利用单端故障线路数据即可进行故障测距。采用后向预测Prony算法提取固有频率,在提取和筛选的过程中引入模糊聚类算法。介绍了PSCAD和MATLAB联合仿真结果。A novel fault-location method based on natural frequency is presented. Compared with traditional natural frequency methods, the algorithm introduces a linear function between fault distance and traveling wave velocity, and a novel fault-location method has been deduced, The proposed method not requires line parameters. Only using the data of one-terminal, the accurate fault distance can be got very easily. The backward prony algorithm is employed to ex- tract the natural frequency, improving the rapidity and accuracy of the method. Simultaneously, the introduction of fuzzy clustering algorithm in the process of extracting and screening the natural frequency has reduced the number of persons needed in the locating process,improving the level of automation. The results of simulations by PSCAD and MATLAB have showed that accurate fault location of HVDC transmission lines can be achieved with the proposed method.

关 键 词：故障测距 固有频率 模糊聚类 后向预测prony算法 

分 类 号：TM721.1[电气工程—电力系统及自动化]