高电压技术2011，Vol.37Issue(8)：1944-1951,8.
利用过渡电阻参数识别的输电线路永久性故障确认方法
Permanent Fault Identification Method of Transmission Lines Using Transition Resistance Parameter
摘要
Abstract
We propose a method to identify permanent faults for the transmission lines with shunt reactors. The method uses π type equivalent model （including the transition resistor branch） of single-phase fault that is switched off as the proto type, and di~tinguishes permanent fault from transient fault by calculating the value of transition re- sister. Furthermore, it {s supposed that the result of fault location is known. In the case of permanent fault, the cal- culated value of transition resistor is very low, but for the transient fault, the value ot＂ transition reslstdr is very high. An alternative transients program （ATPIsimulation software is used to make simu/ation models of transmis- sion lines to emulate transmission line faults in all situations. Then the simulation results are processed through edi- ting MATLAB（matrix laboratory） program, which uses least-square method to calculate the value of transition re- sistor and then draws figures of the results. Through analyzing the figures, we can distinguish permanent fault from transient fault. Compared with traditional criterions, this method is not influenced by non-periodic components and transitidn condition harmonics, etc. Moreover, the severity of the permanent fault can be reflected through calculat- ing the value of transition resistance and the extinction time of secondary arc can be assessed. ATP simulation re- sults show that the proposed method can effectively distinguish permanent fault from transient fault. This method can be applied to the single-phase adaptive reclosure in transmission lines with shunt reactors.关键词
输电线路/参数识别/“型等效模型/单相重合闸/过渡电阻/永久性故障/重合闸时问Key words
transmission lines/parameter identification/π type equivalent model/single-phase rec｜osure/transitiork＂resistance~ permanent fault/reclosing time分类
信息技术与安全科学引用本文复制引用
索南加乐,代玲,宋国兵,王增超,仝小虎..利用过渡电阻参数识别的输电线路永久性故障确认方法[J].高电压技术,2011,37(8):1944-1951,8.基金项目
国家自然科学基金 （）
国家自然科学基金重点项目（51037005）. （）
