基于实时拓扑识别的分布式馈线自动化控制方法

Distributed Feeder Automation Based on Automatic Recognition of Real-time Feeder Topology

现有分布式馈线自动化(FA)算法大都针对具体的馈线拓扑结构与联络开关位置设计,馈线运行方式改变时需要重新调整算法。通过检测开关两侧电压,可以识别联络开关的身份并自动调整控制算法,但要求每一个分段开关两侧都安装电压互感器。提出通过智能终端之间的接力查询,自动识别馈线实时拓扑结构与联络开关位置。相邻分段开关的智能终端间通过交换故障电流检测信息,定位并隔离故障区段;联络开关处的配电终端根据馈线实时拓扑结构计算备供电源容量裕度,从而最大范围恢复非故障区段供电。根据所提方法建立FA系统,静模试验及现场运行结果证明了该方法能够自动适应馈线拓扑结构变化,快速进行故障隔离与供电恢复控制。

The existing feeder automation(FA)mostly designs the algorithm based on the fixed network topology and tie switch position.The algorithm of FA system needs to be reconfigured if the feeder topology changes.Tie switches can be recognized and the algorithm can be adjusted automatically by detecting the voltages of switches with potential transformers installed on both sides.The smart terminal unit(STU)can recognize the feeder topology and the position of tie switches byrelay inquiry.STUs of adjacent switches locate and isolate the faults by exchanging fault current information.STU monitoring tie switch restores maximum power supply according to the real-time feeder topology and the capacity of backup source.The static simulation test and field application proves that the proposed method can automatically adapt to the change of feeder topology,quickly isolate the fault and restore the power supply.