摘要
本文在对比现有线路在线故障检测方法基础上,从低压配电网重要性、场景复杂性以及线路大截面低阻抗特性出发,研究了适合于低压配电网特性SSTDR检测方法,针对低压配电网的接线方法提出了多分枝电网的区段故障定位方法,通过站室智能终端间的配合、检测终端与阻波器配合,实现了低压电网的故障检测与定位。该方法利用站室配电终端对低压线路量测数据监测起动故障定位,在故障情况下通过扩展频谱时域反射波发生器可快速实现故障测距,再加以阻波器的配合可实现多个扩展频谱时域反射波发生器分区端定位,可有效适应低压线路T型连接及分支箱多分枝情况的故障定位时间与定位精度。
Based on the comparison of the existing line fault detection method, the SSTDR detection method is engaged in low voltage distribution network characteristic, for the importance of low voltage distribution network, the complexity of the scene and the low impedance characteristics of the numerous LV lines. The section faults location method of lv multi-branch network is proposed based on SSTDR. The fault detection and positioning of the LV power network are realized by the cooperation between the intelligent terminal of the station and the detection terminal. The method can be used to monitor the fault location of the low-voltage line measurement data through the distribution terminal unit. In the event of a fault, the time-domain reflected wave generator can be quickly realized by the extended spectrum. It is effective to adapt to the fault location time and positioning accuracy of the T-type connection and the branch gearbox of the LV line.
作者
逯怀东
吕平
谢荣昆
向珉江
Lu Huaidong Lv Ping Xie Rongkun Xiang Minjiang(Ji＇nan Power Company of State Grid, Ji＇nan 25020)
出处
《电气技术》
2017年第7期78-81,共4页
Electrical Engineering
