摘要
对10kV配电网线路单相断线非接地故障进行故障定位探讨。采用梯形模糊数估计配变负荷变化情况,建立了单相线路网络模型。当断线相电流减小幅度超过设定值以及满足电压条件时,开始对此单相线路进行电流计算,计算出某节点流出电流为零的可能性最大后,即可确定此节点与其后节点之间发生了断线故障。该方法可缩短故障定位时间。
A method to locate non-grounding line break fault of 10 kV distribution line is presented. A trapezoid fuzzy figure is adopted to estimate the load change of distribution transformer and the single-phase distribution network model is constructed. When the current decrease of broken line exceeds the setting value and the fault-voltage appears,the outflow currents of the load nodes on broken line are calculated. The fault point is between the node,which has the largest probability of zero current ,and the downstream node. The proposed method shortens fault locating time.
出处
《电力自动化设备》
EI
CSCD
北大核心
2005年第12期35-38,共4页
Electric Power Automation Equipment
关键词
配电网络
单相断线
故障定位
distribution network
single-phase line break
fauh locating
